Installation
and Maintenance
Installation
and Maintenance
®
Instructions
AutogardInstructions
Torque
Limiters • Installation and Maintenance Instructions
820 Series
AUTOGARD
SERIES
820 TORQUE
LIMITER
AUTOGARD
SERIES
820 TORQUE
LIMITER
(Page 1 of 20)
British Autogard Ltd
British Autogard Ltd
2 Wilkinson Rd., Love Lane Industrial Estate, Cirencester, Glos., GL7 1YT UK
2 Wilkinson Rd., Love Lane Industrial Estate, Cirencester, Glos., GL7 1YT UK
Tel. +44 (0)1285 640333 – Fax. +44 (0)1285 659476
Tel. +44 (0)1285 640333 – Fax. +44 (0)1285 659476
www.autogard.com
www.autogard.com
Rexnord
3001 W. Canal St., Milwaukee, WI 53208-4200 USA
866-REXNORD/866-739-6673 • www.rexnord.com
PT3-006
July 2015
Supersedes Manual820
AUTOGARD 820 SERIES MODULAR TORQUE LIMITER
Autogard® Torque Limiters • Installation and Maintenance Instructions
(Page 2 of 20)
INSTALLATION ANDContents
MAINTENANCE MANUAL Issue 10
820 Series
AUTOGARD
AUTOGARD
820 SERIES
820 SERIES
MODULAR
MODULAR
TORQUE
TORQUE
LIMITER
LIMITER
Page
INSTALLATION
INSTALLATION
AND
MAINTENANCE
AND MAINTENANCE
MANUAL
MANUAL
Issue 10Issue 10
Contents
1) General Notes
2) General
PrincipleNotes
of Operation
1)
Contents
Contents
31) General Notes
Page
3
32) Principle of Operation
Page Page
3)
Installation
1) Principle
General
1) General
Notes
Notes
2)
of Operation
3
433) Installation
3
4)
Torque
Adjustment
2) Installation
Principle
2) Principle
of Operation
of Operation
3)
3
4934) Torque Adjustment
5)
Manual
Disengagement
3) Torque
Installation
3) Installation
4)
Adjustment
Disengageme
45) Manual
4
910
6)
Resetting
4) Manual
Torque
Adjustment
4) Torque
Adjustment
5)
Disengagement
96) Resetting
9
10
7)
Removing
Modules
5) Resetting
Manual
Disengagement
5) Manual
Disengagement
6)
7) Removing
Modules
10
10
8)
Refitting
ofModules
Existing Modules
6) Removing
Resetting
6) Resetting
7)
10
8) Refitting
10 of Existing M
9)
Fitting
New
Modules
7) Refitting
Removing
7) Removing
Modules
8)
ofModules
Existing
Modules
11
9)1)Fitting
Modules
10 New
General
Notes
10
10)
Switch
Removal
and
Refitting
8) Fitting
Refitting
ofPlate
Existing
Modules
8) Refitting
of
Existing
Modules
9)
New
Modules
13
1)
10)
SwitchNotes
Plate
Rem
11
10
10
2) General
Principle
of
Operatio
11)
Seat
Replacement
10)
Switch
Plate
Removal
and Refitting
9) Fitting
New
Modules
9) Fitting
New
Modules
2)
of Operatio
11)
Seat Replacement
13
11
11
3) Principle
Installation
12)
11)
10)
Routine
Maintenance
Seat
Switch
Plate
Removal
and Refitting
10) Replacement
Switch
Plate Removal
and Refitting
3)
14
12)
Routine
Maintena
13
13
4) Installation
Torque
Adjustment
13)
12)
11)
Fault-Finding
Routine
Maintenance
Seat
11) Replacement
Seat
Replacement
16
4)
Adjustment
13)
Fault-Finding
14
13
13
5) Torque
Manual
Disengagem
12)
13)
Routine
Maintenance
12) Routine
Maintenance
Fault-Finding
5)
14
14 Disengagem
6) Manual
Resetting
16
13)
Fault-Finding
13) Fault-Finding
14)
Spare Parts
INSTALLAT
AUTOGAR
INSTALLAT
2
166)
16
7) Resetting
Removing
Modules
2
167)
8) Removing
Refitting ofModules
Existing
2
1) General Notes
AUTOGAR
2
8)
of Existing
9) Refitting
Fitting New
Module
9)
NewPlate
Module
10)Fitting
Switch
Rem
Rexnord
PT3-006
1.1) This manual applies to Autogard 820 modular torque limiters types 1,2 and 3, and also
July 2015
special
units derived
Supersedes
Manual820
from these types.
3001 W. Canal St., Milwaukee, WI 53208-4200 USA
866-REXNORD/866-739-6673 • www.rexnord.com
10)
11)
Switch
Plate Rem
Seat Replacemen
14)
Spare Parts
16
Autogard® Torque Limiters • Installation and Maintenance Instructions
820 Series
(Page 3 of 20)
1) General Notes
1.1) This manual applies to Autogard 820 modular torque limiters types 1,2 and 3, and also
special units derived from these types.
1.2) This manual is to be used in conjunction with the specific assembly drawing for the unit.
Unless otherwise specified, all screwed fasteners should be secured with Loctite 243 and
torque tightened to the values given in table 1.
Table 1.
Thread Size
Tightening Torque (Nm)
Tightening Torque (lbf.ft)
M3
1.5
1.1
M4
3.3
2.4
M5
6.7
4.9
M6
11
8
M8
28
20
M10
55
40
M12
95
70
M16
236
174
M20
461
340
M24
797
588
1/4” UNF
13
10
5/16” UNF
27
20
3/8” UNF
49
36
1/2” UNF
117
86
5/8” UNF
233
172
3/4” UNF
407
300
1.3) Selection verification – The user is responsible to ensure that the unit ordered will in fact
meet the duty requirements, and that the duty has not changed from the time that the coupling
was originally selected. Autogard can supply details of the duty under which the unit was
originally selected.
2) Principle of Operation
3
Rexnord
3001 W. Canal St., Milwaukee, WI 53208-4200 USA
866-REXNORD/866-739-6673 • www.rexnord.com
PT3-006
July 2015
Supersedes Manual820
meet the duty requirements, and that the duty has not changed from the time that the coupling
Autogard
Torque Limiters
Installation
Maintenance
Instructions
was ®originally
selected.•Autogard
canand
supply
details of the
duty under which the unit was
(Pageoriginally
4 of 20) selected.
820 Series
2) Principle of Operation
The 820 series modular torque limiters include hardened seats in one half of the unit and
The
820sub-assemblies
series modular in
torque
limiters
hardened
seats
in one half
of the the
unitplunger
and
module
the other
halfinclude
such that
torque is
transmitted
between
module
other
half such
torqueinisthe
transmitted
the plunger
3 thrust
and seatsub-assemblies
(see figs 1 and in
2).the
This
produces
an that
end
plunger inbetween
proportion
to the
and
seattorque.
(see figsThis
1 and
2).isThis
produces
an end
thrust in the
plunger
in proportion
to the and
applied
force
resisted
by a ring
of segments
trapped
between
a flat surface
applied
forcebyisdisc
resisted
by aWhen
ring of
trapped
between
flat surface
a conicaltorque.
washerThis
loaded
springs.
thesegments
axial force
reaches
a levelagreater
than and
the
areaction
conicalthrough
washer loaded
by disc
springs. the
When
the axial
level
greater than
the
the spring
mechanism,
plunger
will force
retractreaches
forcinga the
segments
up the
reaction
through
spring itmechanism,
thefrom
plunger
forcing the
up the
plunger slope
andthe
allowing
to disengage
the will
seat.retract
The segments
are segments
then located
on the
plunger
slope and
it toand
disengage
seat. The
segments
are then
on the
larger diameter
of allowing
the plunger
all forcesfrom
are the
balanced
internally
allowing
the located
torque limiter
larger
of the plunger
andfor
allthe
forces
are balanced
internally
allowing the
torque
to run diameter
free and unloaded
(except
auto-reset
version,
which maintains
some
axial limiter
force
to
and at
unloaded
(except for the auto-reset version, which maintains some axial force
onrun
the free
plunger
all times).
on the plunger at all times).
The trip torque is externally adjustable and resetting may be manual or automatic, depending
The
tripapplication.
torque is externally
andincorporate
resetting may
be manual
or automatic,
depending
on the
Some 820adjustable
series units
a limit
switch plate,
which moves
on trip
on
the
application.
Some
820
series
units
incorporate
a
limit
switch
plate,
which
moves
on
trip
and can operate a switch to stop the drive.
and can operate a switch to stop the drive.
A complete 820 series torque limiter may be supplied, in which case the modules will be
A
complete
820
limiter
be supplied,
in which case
modules will
be the
already
fitted,
orseries
loose torque
modules
may may
be supplied
as components
to bethe
incorporated
into
already
fitted,
or design
loose modules
be supplied as components to be incorporated into the
customer’s
own
of torquemay
limiter.
customer’s own design of torque limiter.
Fig. 1 Typical 820 Series Torque Limiter
Fig. 1 Typical 820 Series Torque Limiter
3) Installation – 820 Series Torque Limiter
3) Installation – 820 Series Torque Limiter
PT3-006
3.1) All types
July 2015
3.1) Manual820
All types
Supersedes
Rexnord
3001 W. Canal St., Milwaukee, WI 53208-4200 USA
866-REXNORD/866-739-6673 • www.rexnord.com
Autogard® Torque Limiters • Installation and Maintenance Instructions
Fig. 1 Typical 820 Series Torque Limiter
(Page 5 of 20)
Fig.820
1 Series
Typical 820 Series Torque Limiter
3) Installation – 820 Series Torque Limiter
3) Installation – 820 Series Torque Limiter
3.1) All types
3.1) All types
3.1.1) Unpack the unit and examine for any signs of transit damage. Ensure that the bores are
free from burrs. Verify that all parts have been properly supplied as per the order.
4 equipment is isolated so that the installation
3.1.2) Before installation, ensure that the rotating
4
can be carried out in a safe manner.
3.1.3) There are a number of different arrangements depending on the application. Refer to
the specific assembly drawing for the unit. Unless stated otherwise the following will generally
apply:
3.1.4) On large units tapped holes are provided to allow the use of lifting eyes for safe
handling. The threads are M12, M16, ½” UNC or 5/8” UNC, depending on application.
3.1.5) For keyed hubs the standard clearance-fit bore should permit the hub to be pushed,
pressed or lightly tapped in place on the shaft. Do not strike heavy hammer blows on the hub
as this could damage. Always use a soft-faced hammer.
3.1.6) It interference-fit hubs have been specified, the hubs alone should be heated to 150°C
(302°F) in an oil bath or an oven prior to fitting. Do not use spot heat or exceed 300°C
(572°C) as this may cause distortion.
3.1.7) The hubs should be positioned such that the end of the shaft is flush with the end face
of the hub. Most units have two cup point set screws to lock each hub in position on the shaft.
When the hub is correctly positioned on the shaft and the key is fitted, apply Loctite 243 or
equivalent to the set screws and tighten.
3.1.8) On manual reset versions ensure there is sufficient clearance at the end of the modules
to allow the use of a mallet to strike the reset pin (see fig. 2). Also note the reset pins extend
on trip by the dimensions shown in table 2. Check for adequate clearance in the tripped
condition.
3.1.9) For ease of maintenance, it is also recommended to allow sufficient clearance to
withdraw the modules with the unit installed. The required clearance is shown on the
assembly drawing. This will allow the modules and seats to be replaced more easily. Also, if
the modules can be withdrawn, the unit can be disconnected from the hubs and removed
without the need to move the shafts or hubs.
Rexnord
3001 W. Canal St., Milwaukee, WI 53208-4200 USA
866-REXNORD/866-739-6673 • www.rexnord.com
PT3-006
July 2015
Supersedes Manual820
Autogard® Torque Limiters • Installation and Maintenance Instructions
(Page 6 of 20)
820 Series
Typicalmodule
modulesub-assembly
sub-assembly
Fig.2 2Typical
2 Typical
2 Typical
module
module
sub-assembly
sub-assembly
dule sub-assemblyTable
Table2.2.
Table
Table
2. 2.
Unit
Module
Unit
Modulesub-assembly
sub-assembly
UnitUnit
Module
Module
sub-assembly
sub-assembly
sembly
Reset pin/switch
plate
size
size
movement on trip
size
820-1
1size
820-1types
types1,2,3
1,2,3
1
820-1
820-1
types
types
1,2,31,2,3
3.7mm
(0.145")
820-2
2 12 1
820-2&&-3-3types
types1,2,3
1,2,3
820-2
& -3
1,2,31,2,3
820-2
&types
-3 types
5.0mm
(0.197")
820-4
3 23 2
820-4types
types1,2,3
1,2,3
820-4
820-4
types
types
1,2,31,2,3
6.0mm
(0.236")
820-5
4 34 3
820-5types
types1,2,3
1,2,3
820-5
820-5
types
types
1,2,31,2,3
4 4
8.0mm
(0.315")
Fig.
Fig.
Fig. Fig.
Reset
Resetpin/switch
pin/switchplate
plate
movement
onontrip
Reset
Reset
pin/switch
pin/switch
plateplate
movement
trip
movement
movement
on trip
on trip
3.7mm
(0.145")
3.7mm (0.145")
3.7mm
3.7mm
(0.145")
(0.145")
5.0mm
5.0mm(0.197")
(0.197")
5.0mm
(0.197")
5.0mm
(0.197")
6.0mm
6.0mm(0.236")
(0.236")
6.0mm
6.0mm
(0.236")
(0.236")
8.0mm
8.0mm(0.315")
(0.315")
8.0mm
8.0mm
(0.315")
(0.315")
3.1.10)
3.1.10)On
Onallallversions
versionsensure
ensurethat
thataccess
accesstotothe
thegrease
greasenipples
nipplesininthe
theend
endofofthe
themodules
modulesisis
(see
2).
3.1.10)
On
all
On
versions
all
ensure
that that
access
access
to the
to grease
the grease
nipples
nipples
in the
in end
the end
of the
of modules
the modules
is is
possible
(see
fig.
2).versions
the grease nipplespossible
in
the3.1.10)
end
offig.
the
modules
is ensure
possible
possible
(see (see
fig. 2).
fig. 2). on flanges etc. should be secured with Loctite 243 or equivalent
3.1.11)
3.1.11)Threaded
Threadedfasteners
fasteners on flanges etc. should be secured with Loctite 243 or equivalent
and
torque
tightened
toto
the
inintable
1,1,unless
specified
onon
specific
3.1.11)
3.1.11)
Threaded
Threaded
fasteners
fasteners
on
flanges
ongiven
flanges
etc.
etc.
should
should
beunless
secured
be otherwise
secured
withwith
Loctite
Loctite
243
243
orthe
equivalent
or
equivalent
andLoctite
torque243
tightened
thevalues
values
given
table
otherwise
specified
the
specific
hould be secured with
or equivalent
assembly
drawing
for
the
unit.
and
and
torque
torque
tightened
tightened
to
the
to
values
the
values
given
given
in
table
in
table
1,
unless
1,
unless
otherwise
otherwise
specified
specified
on
the
on
specific
the
specific
assembly
drawing
forspecific
the unit.
able 1, unless otherwise
specified
on the
assembly
assembly
drawing
drawing
for the
for unit.
the unit.
3.1.12)
3.1.12)IfIfthe
theunit
unitwas
wassupplied
suppliedtotoa asetsettorque
torquethis
thiswill
willbebestated
statedononthe
thelabel.
label.Otherwise
Otherwisesee
see
section
4
'Torque
Adjustment'.
3.1.12)
If
the
unit
was
supplied
to
a
set
torque
this
will
be
stated
on
the
label.
Otherwise
see
3.1.12)
If
the
unit
was
supplied
to
a
set
torque
this
will
be
stated
on
the
label.
Otherwise
see
'Torque
Adjustment'.
ue this will be statedsection
on the4label.
Otherwise
see
section
section
4
'Torque
4
'Torque
Adjustment'.
Adjustment'.
3.1.13)
3.1.13)Some
Someunits
unitsare
arefitted
fittedwith
witha alimit
limitswitch
switchplate,
plate,which
whichmoves
movesaxially
axiallyonontrip
tripand
andcan
canbebe
used
to
operate
a
switch
to
stop
the
drive.
The
movement
on
trip
is
shown
in
table
2.
3.1.13)
3.1.13)
Some
Some
units
units
are
fitted
are
fitted
with
with
a
limit
a
limit
switch
switch
plate,
plate,
which
which
moves
moves
axially
axially
on
trip
on
and
trip
and
can
be
can be
usedaxially
to operate
a switch
to be
stop the drive. The movement on trip is shown in table 2.
itch plate, which moves
on trip
and can
used
used
toWith
operate
toinoperate
a switch
to stop
to stop
the drive.
the drive.
The The
movement
movement
on trip
on is
trip
shown
is shown
in table
in table
2. 2.to
he movement on trip
is shown
table
2.a switch
3.1.14)
auto-reset
units
3.1.14)
With
auto-reset
unitsthe
thedrive
driveshould
shouldbebestopped
stoppedwithin
withina afew
fewseconds
secondsafter
aftertrip,
trip, to
minimise
wear
of
the
plungers
and
(use
speed
sensors
methods).
3.1.14)
3.1.14)
With
With
auto-reset
auto-reset
units
the
drive
the
drive
should
should
beswitch,
stopped
be stopped
within
within
a few
a or
few
seconds
seconds
after
after
trip,trip,
to to
minimise
wear
of
the
plungers
andseats
seats
(uselimit
limit
switch,
speed
sensors
orother
other
methods).
d be stopped within
a few
seconds
after
trip,
to units
For
manual
reset
versions
the
drive
may
continue
to
run
after
trip.
minimise
minimise
wear
wear
of
the
of
plungers
the
plungers
and
and
seats
seats
(use
(use
limit
limit
switch,
switch,
speed
speed
sensors
sensors
or
other
or
other
methods).
methods).
manual
reset methods).
versions the drive may continue to run after trip.
limit switch, speed For
sensors
or other
For For
manual
manual
resetreset
versions
versions
the drive
the drive
maymay
continue
continue
to run
to after
run after
trip.trip.
inue to run after trip.
PT3-006
July 2015
Supersedes Manual820
66
Rexnord
3001 W. Canal St., Milwaukee, WI 53208-4200 USA
866-REXNORD/866-739-6673 • www.rexnord.com
Autogard® Torque Limiters • Installation and Maintenance Instructions
820 Series
(Page 7 of 20)
3.1.15)
820
series
units
may
be
supplied
with
some
unused
module
ports,
which
are
fitted
3.1.15)
820
series
units
may
be
supplied
with
some
unused
module
ports,
which
are
fitted
3.1.15)
820
series
units
may
be
supplied
with
some
unused
module
ports,
which
are
fitted
with
blanking
plates.
This
is
often
the
case
when
the
torque
requirement
is
uncertain,
as
it
3.1.15)
820
series
units
may
be
supplied
with
some
unused
module
ports,
which
are
fitted
with
blanking
plates.
This
is
often
the
case
when
the
torque
requirement
is
uncertain,
as
it
with
blanking
plates.
This
is
often
the
case
when
the
torque
requirement
is
uncertain,
as
allows
the
torque
capacity
be
increased
by
adding
extra
modules.
Additional
modules
with blanking
plates.
This isto
often
the case when
the torque
requirement
is uncertain,
as it
it
allows
the
torque
capacity
to
be
increased
by
adding
extra
modules.
Additional
modules
allows
the
torque
capacity
to
be
increased
by
adding
extra
modules.
Additional
modules
should
be
positioned
such
that
they
will
not
cause
out-of-balance
forces
(eg.
Add
2
off
allows
the
torque
capacity
to
be
increased
by
adding
extra
modules.
Additional
modules
should
be positioned
such that
they will
not
cause out-of-balance
forces (eg.
Add 22 off
should
positioned
that
will
not
modules
opposite
each
other).
should be
bediametrically
positioned such
such
that they
they
will
not cause
cause out-of-balance
out-of-balance forces
forces (eg.
(eg. Add
Add 2 off
off
modules
diametrically
opposite
each
other).
modules
diametrically
opposite
each
other).
modules
diametrically
opposite
each
other).
3.1.16)
General
Safety:
In
common
with
all
mechanical
devices,
the
user
must
ensure
safe
3.1.16)
General
Safety:
In
common
with
all
mechanical
devices,
the
user
must
ensure
safe
3.1.16)
General
Safety:
In
common
with
all
mechanical
devices,
the
user
must
ensure
safe
application
and
use
of
the
product
with
respect
to
local
conditions,
e.g.
lifting
applications,
3.1.16)
General
Safety:
In
common
with
all
mechanical
devices,
the
user
must
ensure
safe
application
and
use
of
the
product
with
respect
to
local
conditions,
e.g.
lifting
applications,
application
and
use
of
the
product
with
respect
to
local
conditions,
e.g.
lifting
applications,
explosive
environments
etc.
As
a
rotating
component,
adequate
guarding
must
be
provided,
in
application
and use of the
product
with respect
to localadequate
conditions,
e.g. lifting
applications,
explosive
environments
etc.
As
aa rotating
component,
guarding
must
be
provided,
in
explosive
environments
etc.
As
rotating
component,
adequate
guarding
must
be
provided,
accordance
with
current
codes
practice.
explosive
environments
etc.
Asof
a rotating
component, adequate guarding must be provided, in
in
accordance
with
current
codes
of
practice.
accordance
with
current
codes
of
practice.
accordance with current codes of practice.
3.2)
820
Type
11 and
22
3.2)
820
Type
and
3.2)
820
Type
1
and
22
3.2) 820
Type
1 and
3.2.1)
Fit
the
S1
hub
to
its
shaft
and
secure
the
locking
set
screws
with
Loctite
243.
3.2.1)
Fit
the
S1
hub
to
its
shaft
and
secure
the
locking
set
screws
with
Loctite
243.
3.2.1)
Fit
the
S1
hub
to
its
shaft
and
secure
the
locking
set
screws
with
Loctite
243.
3.2.1)
Fit
the
S1
hub
to
its
shaft
and
secure
the
locking
set
screws
with
Loctite
243.
3.2.2)
If
applicable,
place
the
switch
plate
over
the
hub,
ensuring
the
wide
flanges
of
the
3.2.2)
If
applicable,
place
the
switch
plate
over
the
hub,
ensuring
the
wide
flanges
of
the
3.2.2)
If
applicable,
place
the
switch
plate
over
the
hub,
ensuring
the
wide
flanges
of
the
plastic
bushes
are
on
the
correct
side
(see
assembly
drawing
and
fig.7)
3.2.2)
If
applicable,
place
the
switch
plate
over
the
hub,
ensuring
the
wide
flanges
of
the
plastic
bushes
are
on
the
correct
side
(see
assembly
drawing
and
fig.7)
plastic
bushes
are
on
the
correct
side
(see
assembly
drawing
and
fig.7)
plastic bushes
are
on
the correct
side
(seehub,
assembly
drawing
and
fig.7) if present (balanced
3.2.3)
Attach
the
module
unit
to
the
S1
observing
match
marking
3.2.3)
Attach
the
module
unit
to
the
S1
hub,
observing
match
marking
if
present (balanced
3.2.3)
Attach
the
module
unit
to
the
S1
hub,
observing
match
marking
if
(balanced
units
Apply
Loctite
243
to
the
fixing
and
torque
tighten
(see
table
1).
3.2.3)only).
Attach
the module
unit
to
the
S1
hub,screws
observing
match marking
if present
present
(balanced
units
only).
Apply
Loctite
243
to
the
fixing
screws
and
torque
tighten
(see
table
1).
units
only).
Apply
Loctite
243
to
the
fixing
screws
and
torque
tighten
(see
table
1).
units
only).
Apply
Loctite
243
to
the
fixing
screws
and
torque
tighten
(see
table
1).
3.2.4)
Attach
the
switch
plate
(if
applicable)
as
described
in
section
10
3.2.4)
Attach
the
switch
plate
(if
applicable)
as
described
in
section
10
3.2.4)
Attach
the
switch
plate
(if
applicable)
as
described
in
section
10
3.2.4)
Attach
the
switch
plate
(if
applicable)
as
described
in
section
10 Loctite 243.
3.2.5)
Fit
the
S2
hub
to
its
shaft
and
secure
the
locking
set
screws
with
3.2.5)
Fit
the
S2
hub
to
its
shaft
and
secure
the
locking
set
screws
with
Loctite 243.
3.2.5)
3.2.5) Fit
Fit the
the S2
S2 hub
hub to
to its
its shaft
shaft and
and secure
secure the
the locking
locking set
set screws
screws with
with Loctite
Loctite 243.
243.
3.3)
820
Type
11 only
3.3)
820
Type
only
3.3)
820
Type
3.3) 820
Type 11 only
only
3.3.1)
Assemble
the
3.3.1)
Assemble
the flexible
flexible elements,sleeves
elements,sleeves and
and washers
washers to
to the
the seat
seat plate
plate as
as shown
shown on
on the
the
3.3.1)
Assemble
the
flexible
elements,sleeves
and
washers
to
the
seat
plate
as
shown
on
assembly
drawing,
using
Loctite
243
on
the
screws
and
torque
tighten
to
the
specified
3.3.1)
Assemble
the
flexible
elements,sleeves
and washers
to the
seat plate
asvalue
shown
on the
the
assembly
drawing,
using
Loctite
243
on
the
screws
and
torque
tighten
to
the
value
specified
assembly
drawing,
using
on
drawing.
assembly
drawing,
using Loctite
Loctite 243
243 on
on the
the screws
screws and
and torque
torque tighten
tighten to
to the
the value
value specified
specified
on the
the assembly
assembly
drawing.
on
the
assembly
drawing.
on
the
assembly
drawing.
3.3.2)
3.3.2) Bring
Bring the
the shafts
shafts together,
together, engaging
engaging the
the flexible
flexible elements
elements in
in the
the holes
holes in
in the
the S2
S2 hub.
hub.
3.3.2)
Bring
the
shafts
together,
engaging
the
flexible
elements
in
the
holes
in
the
S2
hub.
Align
the
shafts
ensure
that
the
gap
between
the
S2
hub
and
the
module
correct
3.3.2)
Bring
theto
shafts
together,
engaging
the flexible
elements
in the
holesplate
in theis
S2
hub.
Align
the
shafts
to
ensure
that
the
gap
between
the
S2
hub
and
the
module
plate
is
correct
Align
the
shafts
ensure
the
gap
the
S2
hub
and
plate
is
(refer
to
and
angular,
parallel
and
are
within
the
Align
shafts to
to drawing)
ensure that
that
gap between
between
S2axial
hub misalignment
and the
the module
module
is correct
correct
(refer the
to assembly
assembly
drawing)
andthe
angular,
parallelthe
and
axial
misalignment
areplate
within
the limits
limits
(refer
to
assembly
drawing)
and
angular,
parallel
and
axial
misalignment
are
within
the
stated
on
the
assembly
drawing.
Fix
the
shafts
in
the
position.
(refer
to
assembly
drawing)
and angular,
parallel
and correct
axial misalignment
are within the limits
limits
stated
on
the
assembly
drawing.
Fix
the
shafts
in
the
correct
position.
stated
stated on
on the
the assembly
assembly drawing.
drawing. Fix
Fix the
the shafts
shafts in
in the
the correct
correct position.
position.
3.4)
820
Type
only
3.4) 820
820 Type
Type 222 only
only
3.4)
3.4)
820
Type
2
only
3.4.1)
Place
the
Samiflex
ring
over
the
S2
hub.
3.4.1) Place
Place the
the Samiflex
Samiflex ring
ring over
over the
the S2
S2 hub.
hub.
3.4.1)
3.4.1)
Place
the
Samiflex
ring
over
the
S2
hub.
3.4.2)
Bring
the
shafts
together.
Align
the
shafts
to
ensure
that
the
gap
between
the
coupling
3.4.2) Bring
Bring the
the shafts
shafts together.
together. Align
Align the
the shafts
shafts to
to ensure
ensure that
that the
the gap
gap between
between the
the coupling
coupling
3.4.2)
halves.is
correct
(refer
to
assembly
drawing)
and
angular,
parallel
and
axial
misalignment
are
3.4.2)
Bring
the
shafts
together.
Align
the
shafts
to
ensure
that
the
gap
between
the
coupling
halves.is correct
correct (refer
(refer to
to assembly
assembly drawing)
drawing) and
and angular,
angular, parallel
parallel and
and axial
axial misalignment
misalignment are
are
halves.is
within
the
limits
stated
on
the
assembly
drawing.
Fix
the
shafts
in
the
correct
position.
halves.is
correct
(refer
to
assembly
drawing)
and
angular,
parallel
and
axial
misalignment
are
within the
the limits
limits stated
stated on
on the
the assembly
assembly drawing. Fix
Fix the
the shafts in
in the
the correct
correct position.
position.
within
within
the
limits
stated
on the
the coupling
assemblytodrawing.
drawing.
Fix
the shafts
shafts
inthe
theflexible
correctelement.
position.
3.4.3)
Rotate
one
half
of
align
the
teeth,
and
fit
3.4.3) Rotate
Rotate one
one half
half of the
the coupling
coupling to
to align
align the teeth,
teeth, and
and fit
fit the
the flexible
flexible element.
element.
3.4.3)
3.4.3)
Rotate
oneSamiflex
half of
of the
coupling
topins
alignonthe
the
teeth,
and
fit
the
flexible
element.
3.4.4)
To
fit
the
ring,
align
the
the
inside
of
the
ring
with
the
slots
which
run
3.4.4) To
To fit
fit the
the Samiflex
Samiflex ring,
ring, align
align the
the pins
pins on
on the
the inside
inside of
of the
the ring
ring with
with the
the slots
slots which
which run
run
3.4.4)
the
full
width
of
the
elastic
insert.
Tap
the
ring
into
soft-faced
until
the
3.4.4)
To
fit the
Samiflex
ring,
align
the
pins
on
theposition
inside ofwith
the aaring
with thehammer
slots which
run
the
full
width
of
the
elastic
insert.
Tap
the
ring
into
position
with
soft-faced
hammer
until
the
the
full
width
of
the
elastic
insert.
Tap
the
ring
into
position
with
a
soft-faced
hammer
until
the
pins
locate
in
the
central
holes
in
the
elastic
insert.
the
full
width
of
the
elastic
insert.
Tap
the
ring
into
position
with
a
soft-faced
hammer
until
the
pins locate
locate in
in the
the central holes
holes in
in the elastic
elastic insert.
insert.
pins
pins
locate
in
theiscentral
central
holes
in the
the
elastic
insert.
3.4.5)
The
ring
retained
by
two
set
screws
which
engage
with
holes
in
the
elastic
insert.
3.4.5) The
The ring
ring is
is retained
retained by
by two
two set
set screws
screws which
which engage
engage with
with holes
holes in
in the
the elastic
elastic insert.
insert.
3.4.5)
Apply
Loctite
and
fit
the
with
the
outside
of
the
ring.
3.4.5)
The ring243
is retained
byscrews
two setflush
screws
which
engagediameter
with holes
in
the
elastic insert.
Apply
Loctite
243
and
fit
the
screws
flush
with
the
outside
diameter
of
the
ring.
Apply
Apply Loctite
Loctite 243
243 and
and fit
fit the
the screws
screws flush
flush with
with the
the outside
outside diameter
diameter of
of the
the ring.
ring.
Rexnord
3001 W. Canal St., Milwaukee, WI 53208-4200 USA
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PT3-006
77
July 2015
Supersedes Manual820
Autogard® Torque Limiters • Installation and Maintenance Instructions
(Page 8 of 20)
820 Series
3.5) 820 Type 3 only
3.5) 820 Type 3 only
3.5.1) Position the shafts at the correct distance between shaft ends (see assembly drawing)
3.5.1)
Position
the shafts
atand
the axial
correct
distance between
shaftthe
ends
(seestated
assembly
drawing)
and ensure
angular,
parallel
misalignment
are within
limits
on the
assembly
and
ensure
angular,
parallel
and
axial
misalignment
are
within
the
limits
stated
on
the
assembly
drawing. Fix the shafts in this position.
drawing. Fix the shafts in this position.
3.5.2) Fit the S1 hub to its shaft and secure the locking set screws with Loctite 243.
3.5.2) Fit the S1 hub to its shaft and secure the locking set screws with Loctite 243.
3.5.3) If applicable, place the switch plate over the hub, ensuring the wide flanges of the
3.5.3)
If applicable,
the switch
plateassembly
over the drawing
hub, ensuring
the wide flanges of the
plastic bushes
are on place
the correct
side (see
and fig.7)
plastic bushes are on the correct side (see assembly drawing and fig.7)
3.5.4) Attach the module unit to the S1 hub, observing match marking if present (balanced
3.5.4)
Attach
the module
hub,screws
observing
match marking
if present
(balanced
units only).
Apply
Loctiteunit
243to
to the
theS1
fixing
and torque
tighten (see
table 1).
units only). Apply Loctite 243 to the fixing screws and torque tighten (see table 1).
3.5.5) Attach the switch plate (if applicable) as described in section 10.
3.5.5) Attach the switch plate (if applicable) as described in section 10.
3.5.6) The coupling will be supplied as a spacer/adaptor sub assembly including one flexring
3.5.6)
Thethe
coupling
a spacer/adaptor
sub assembly
including one flexring
pack, with
S2 hubwill
andbeitssupplied
flexringas
pack
and fixings supplied
separately.
pack, with the S2 hub and its flexring pack and fixings supplied separately.
3.5.7) Fit the S2 hub to its shaft, check the dimension from the hub face to the torque limiter
3.5.7)
Fit the S2
hubassembly
to its shaft,
check and
the dimension
the hubset
face
to thewith
torque
limiter
face is correct
to the
drawing,
secure the from
hub locking
screws
Loctite
face
is
correct
to
the
assembly
drawing,
and
secure
the
hub
locking
set
screws
with
Loctite
243.
243.
3.5.8) Mount the spacer/adaptor sub-assembly on the spigot of the torque limiter as shown on
3.5.8)
Mountdrawing,
the spacer/adaptor
sub-assembly
the spigot
of the torque
limiterApply
as shown
on
the assembly
observing match
markingon
if present
(balanced
units only).
Loctite
the
assembly
drawing,
observing
match
marking
if
present
(balanced
units
only).
Apply
Loctite
243 to the fixing screws and torque tighten as per table 1. Support the spacer.
243 to the fixing screws and torque tighten as per table 1. Support the spacer.
3.5.9) Rotate the S2 shaft to align the small holes of the S2 hub with the large holes of the
3.5.9)
Rotate
the S2 shaft to align the small holes of the S2 hub with the large holes of the
coupling
spacer.
coupling spacer.
3.5.10) Install three of the drive bolts though the small holes in the hub and then through the
3.5.10)
Install
of the drive
bolts
thefig.3.
smallNote
holesthe
in correct
the huborientation
and then through
membrane
packthree
and overload
collar
as though
shown in
of the the
membrane
collar
as shown
in fig.3.
Note thetocorrect
orientation
of the
membrane pack
pack -and
theoverload
integral thin
washers
should
be adjacent
the overload
collars
Hand
membrane
pack
the
integral
thin
washers
should
be
adjacent
to
the
overload
collars
Hand
tighten the drive nuts.
tighten the drive nuts.
Fig.3 Installation of first three drive bolts
Fig.3 Installation of first three drive bolts
PT3-006
Rexnord
3001 W. Canal St., Milwaukee, WI 53208-4200 USA
866-REXNORD/866-739-6673 • www.rexnord.com
July 2015
Supersedes Manual820
8
Autogard® Torque Limiters • Installation and Maintenance Instructions
820 Series
(Page 9 of 20)
3.5.11) Install the three remaining drive bolts through the overload collar, the large holes in
3.5.11)
the threepack
remaining
through
the overload
collar,
the large
in
the hub, Install
the membrane
and thedrive
smallbolts
holes
in the spacer
as shown
in fig.4
Handholes
tighten
3.5.11)
Install
the
three
remaining
drive
bolts
through
the
overload
collar,
the
large
holes
in
the
hub, Install
the
membrane
and thedrive
smallbolts
holes
in the spacer
as shown
in fig.4
Handholes
tighten
the
drive
nuts.
3.5.11)
the threepack
remaining
through
the overload
collar,
the large
in
the
hub,
the
membrane
pack
and
the
small
holes
in
the
spacer
as
shown
in
fig.4
Hand
tighten
the
drive
nuts.
the
membrane pack and the small holes in the spacer as shown in fig.4 Hand tighten
the hub,
drivethe
nuts.
the drive nuts.
Fig. 4 Installation of final three drive bolts
Fig. 4 Installation of final three drive bolts
Fig. 4 Installation of final three drive bolts
Fig. 4 Installation of final three drive bolts
3.5.12) Remove the spacer support and tighten all drive nuts to the torque shown in table 3.
3.5.12)
spacer support
and tighten
all drivedry
nuts- Loctite
to the torque
in table 3.
The
driveRemove
nuts arethe
self-locking
and should
be assembled
is not shown
required.
3.5.12)
Remove
the
spacer support
and tighten
all drivedry
nuts- Loctite
to the torque
shown
in table 3.
The
drive
nuts
are
self-locking
and
should
be
assembled
is
not
required.
3.5.12)
spacer support
and tighten
all drivedry
nuts- Loctite
to the torque
in table 3.
Tabledrive
3 Remove
The
nuts arethe
self-locking
and should
be assembled
is not shown
required.
The
Tabledrive
3 nuts are self-locking and should be assembled dry - Loctite is not required.
Drive
Drive nut A/F
Nut tightening torque Nut tightening torque
Table nut
3 thread
Table nut
3 thread
Drive
Drive nut A/F
Nut tightening torque Nut tightening torque
(dry)
Nm
(dry)tightening
lb.ft
Drive nut thread
Drive nut A/F
Nut tightening
torque Nut
torque
Drive nut thread
Drive nut A/F
Nut
torque Nut
torque
(dry)tightening
Nm
(dry)tightening
lb.ft
M12
19mm
71
52
(dry) Nm
(dry) lb.ft
(dry)
(dry)
M12
19mm
71 Nm
52 lb.ft
M14
22mm
114
84
M12
19mm
71
52
M12
19mm
71
52
M14
22mm
114
84
M16
24mm
177
131
M14
22mm
114
84
M14
22mm
114
84
M16
24mm
177
131
M18
27mm
240
177
M16
24mm
177
131
M16
24mm
177
131
M18
27mm
240
177
M20
30mm
330
243
M18
27mm
240
177
M18
27mm
240
177
M20
30mm
330
243
M22
32mm
412
304
M20
30mm
330
243
M20
30mm
330
243
M22
32mm
412
304
M24
36mm
585
431
M22
32mm
412
304
M22
32mm
412
304
M24
36mm
585
431
M27
41mm
867
638
M24
36mm
585
431
M24
36mm
585
431
M27
41mm
867
638
M27
41mm
867
638
M27
41mm
867
638
4) Torque Adjustment
4) Torque Adjustment
4.1)Torque
The torque
limiter trip torque should be set high enough so that tripping does not occur
4)
Adjustment
4)
Torque
Adjustment
4.1)
The
torque
limiterand
triprunning
torque conditions,
should be set
high enough
that tripping
notgreater
occur
under normal start-up
(noting
that the so
start-up
torque does
is often
4.1)
The
torque
limiterand
triprunning
torque conditions,
should be set
high enough
so
that tripping
does
notgreater
occur
under
normal
start-up
(noting
that
the
start-up
torque
is
often
than the
running
torque),
buttorque
not soshould
high asbetoset
reduce
the levelsoofthat
protection
against
overload.
4.1)
The
torque
limiterand
trip
high enough
tripping
does
not
occur
under
normal
start-up
running
conditions,
(noting
thatlevel
the start-up
torqueagainst
is often
greater
than
the
running
torque),
but
not
so
high
as
to
reduce
the
of
protection
overload.
under
normal
start-up
and
running
conditions,
(noting
that
the
start-up
torque
is
often
greater
than the running torque), but not so high as to reduce the level of protection against overload.
than
the running torque), but not so high as to reduce the level of protection against overload.
Rexnord
PT3-006
3001 W. Canal St., Milwaukee, WI 53208-4200 USA
866-REXNORD/866-739-6673 • www.rexnord.com
9
9
9
July 2015
Supersedes Manual820
Autogard® Torque Limiters • Installation and Maintenance Instructions
(PageThis
10 ofmay
20) be
achieved by trial and adjustment on site, or, if the
820required
Series trip torque is known,
This
may
be
achieved
by
trial
and
adjustment
on
site,
or,
if
the
required
tripsupplied
torque isfactoryknown,
by reference to the calibration curve supplied with the unit. Some units are
by
reference
to the
curve
supplied
withbethestated
unit.the
Some
units
supplied
factoryThis
be
by
and
adjustment
on
required
trip
torque
known,
set
a specific
tripcalibration
torque
(+/10%),
which will
on
the
label.are
(Factory-set
can
Thistomay
may
be achieved
achieved
by trial
trial
and
adjustment
on site,
site, or,
or, if
if the
required
trip
torque is
is units
known,
set
to
a
specific
trip
torque
(+/10%),
which
will
be
stated
on
the
label.
(Factory-set
units
can
by
reference
to
curve
be adjusted
if necessary).
by
referenceon-site
to the
the calibration
calibration
curve supplied
supplied with
with the
the unit.
unit. Some
Some units
units are
are supplied
supplied factoryfactorybe adjusted
on-site
if necessary).
set
aa specific
trip
(+/- 10%),
will
be
stated
the
label.
(Factory-set units
can
set to
toThe
specific
trip torque
torque
10%),bywhich
which
willthe
beadjuster
stated on
on
thefig.
label.
can
4.2)
trip torque
can be(+/adjusted
turning
(see
2), (Factory-set
clockwise tounits
increase
be
adjusted
on-site
if
necessary).
4.2)
The
torque
be adjusted
adjusterthen
(seethe
fig.gap
2),'X'
clockwise
to increase
be adjusted
on-site
if can
necessary).
torque
andtrip
vice
versa.
If the
required by
tripturning
torquethe
is known
can be obtained
torque
and
vice
versa.
If
the
required
trip
torque
is
known
then
the
gap
'X'
can
be
obtained
4.2)
trip
can
adjusted
by
adjuster
2),
to
from
the calibration
the unit.the
Alternatively
thefig.
setting
can be determined
4.2) The
The
trip torque
torquecurve
can be
besupplied
adjustedwith
by turning
turning
the
adjuster (see
(see
fig.
2), clockwise
clockwise
to increase
increase
from
the
calibration
curve
supplied
with
the
unit. isAlternatively
the
setting
can
be
determined
torque
and
vice
versa.
If
the
required
trip
torque
known
then
the
gap
'X'
can
be
obtained
on
site,
starting
with
a
low
setting,
and
progressively
increasing
it
until
the
unit
starts
and runs
torque and vice versa. If the required trip torque is known then the gap 'X' can be obtained
on
site,
starting
with
a low
setting,
progressively
increasing
itbeuntil
theconvenient
unit starts
runs
from
the
calibration
curve
supplied
with
the
Alternatively
setting
can
without
under
normal
load.and
In some
applications
it maythe
more
toand
reverse
from
thetripping
calibration
curve
supplied
with
the unit.
unit.
Alternatively
the
setting
can be
be determined
determined
without
tripping
under
normal
load.
In some
applications
it itmay
betripping
more convenient
reverse
on
starting
with
aa low
setting,
progressively
increasing
it
starts
runs
this,
starting
with
a high
setting
andand
progressively
reducing
until
occurs
ontoand
start-up
on site,
site,
starting
with
low
setting,
and
progressively
increasing
it until
until the
the unit
unit
starts
and
runs
this,
starting
with
a
high
setting
and
progressively
reducing
it
until
tripping
occurs
on
start-up
without
tripping
under
load.
some
applications
may
more
or running,
then increasing
it until
starts
and runs it
without
tripping
under normal
normal
load.theIn
Inunit
some
applications
itwithout
may be
betripping.
more convenient
convenient to
to reverse
reverse
or running,
then
increasing
it until the
unit starts and runs without
tripping. occurs on start-up
this,
starting
with
this,
starting
with aa high
high setting
setting and
and progressively
progressively reducing
reducing it
it until
until tripping
tripping occurs on start-up
Proceed
as follows;
or
running,
then
Proceed
as follows;
or
running,
then increasing
increasing it
it until
until the
the unit
unit starts
starts and
and runs
runs without
without tripping.
tripping.
4.2.1) Ensure the torque limiter is engaged before adjusting the torque (see section 6).
Proceed
as
4.2.1)
the torque limiter is engaged before adjusting the torque (see section 6).
ProceedEnsure
as follows;
follows;
4.2.2) Unscrew the three unpainted set screws which lock the adjuster hexagon on each
4.2.1)
thethe
torque
limiter
is engaged
before
adjusting
the
torque
(see
6).
4.2.2)
Unscrew
three
unpainted
set
screws
which
lock
the
adjuster
hexagon
on each
4.2.1) Ensure
Ensure
torque
limiter
before
adjusting
the
torque
(see section
section
6).
module.
Do notthe
disturb
the
three issetengaged
screws
which
are
sealed
with
red paint.
Do not
disturb
module.
Do
not disturb
theunpainted
three
set set
screws
which
are lock
sealed
with
redaccess
paint.
Dothe
not
disturb
4.2.2)
Unscrew
the
three
screws
which
the
adjuster
hexagon
on
each
the
single
clamp
screw
which
is
sealed
with
red
paint.
On
some
units
to
set
screws
4.2.2) Unscrew the three unpainted set screws which lock the adjuster hexagon on each
the
single
clamp
screw
which
is
sealed
with
red
paint.
On
some
units
access
to
the
set
screws
module.
Do
disturb
the
three
screws
which
are
will
be easier
if the
switch
removed
section
10). with
module.
Do not
not
disturb
theplate
threeisset
set
screws(see
which
are sealed
sealed
with red
red paint.
paint. Do
Do not
not disturb
disturb
will
be easier
if the
switch
plate
is removed
sectionOn
10).
the
clamp
screw
which
is
with (see
red
some
access
to the
screws
the single
single
clamp
which
is sealed
sealed
red paint.
paint.
Onmodule
some units
units
access
the set
setbody
screws
4.2.3)
Adjust
thescrew
gap 'X'
by turning
thewith
adjuster
on each
(ensure
the to
module
will
be
easier
if
the
switch
plate
is
removed
(see
section
10).
4.2.3)
Adjust
gap
'X' by
turning
the adjuster
on each
module
(ensurecurve.
the module
body
will be
easier
switch
plate
is removed
section
does
not
turn)ifthe
tothegive
the
required
torque
as(see
indicated
by10).
the calibration
Alternatively,
does
not
turn)
to
give
the
required
torque
as
indicated
by
the
calibration
curve.
Alternatively,
4.2.3)
Adjust
the
gap
by
the
adjuster
module
(ensure
the
if
setting
by trial,
setting in
ofeach
1/4 turn
of the
adjusters.
4.2.3)
Adjust
thechange
gap 'X'
'X'the
by turning
turning
theincrements
adjuster on
on
each
module
(ensure
the module
module body
body
if
setting
by trial,
change
the
settingtorque
in increments
of 1/4
turn
of the adjusters.
does
not
turn)
to
give
the
required
as
indicated
by
the
calibration
curve.
Alternatively,
does
not
turn)
to
give
the
required
torque
as
indicated
by
the
calibration
curve.
Alternatively,
4.2.4) When the correct setting has been achieved apply Loctite 243 or equivalent to the
if
by
trial,
change
the
in
increments
of
1/4
of
the
adjusters.
4.2.4)
When
the correct
setting
hasswitch
been
achieved
Loctite
243
or
to the
if setting
setting
byscrews
trial,
change
the setting
setting
in
increments
ofapply
1/4 turn
turn
of
the
locking
set
and re-fit.
If the
plate was
removed
re-fit
itadjusters.
(seeequivalent
section 10).
locking
set
screws
and
re-fit.
If
the
switch
plate
was
removed
re-fit
it
(see
section
10).
4.2.4)
4.2.4) When
When the
the correct
correct setting
setting has
has been
been achieved
achieved apply
apply Loctite
Loctite 243
243 or
or equivalent
equivalent to
to the
the
locking
set
screws
and
re-fit.
If
the
switch
plate
was
removed
re-fit
it
(see
section
10).
locking set screws and re-fit. If the switch plate was removed re-fit it (see section 10).
5) Manual Disengagement (not applicable to Auto-Reset versions)
5) Manual Disengagement (not applicable to Auto-Reset versions)
To manually disengage the torque limiter rotate the disengaging sleeve (smaller of the two
5)
Disengagement
(not
applicable
to
versions)
To Manual
manually
disengage
theeach
torque
limiter
the disengaging
sleeve (smaller
of theuntil
two it
5)
Manual
(not
applicable
to Auto-Reset
Auto-Reset
versions)
hexagons
– Disengagement
see
fig. 2) on
module
in arotate
clockwise
direction
through
several turns
hexagons
see
fig.
2) this
on
each
module
inthread).
arotate
clockwise
direction through(smaller
several turns
until it
To
disengage
the
limiter
reaches
its–stop
(note
a left-hand
To manually
manually
disengage
theistorque
torque
limiter
rotate the
the disengaging
disengaging sleeve
sleeve (smaller of
of the
the two
two
reaches
its––stop
(note
this
is a left-hand
thread).
hexagons
see
fig.
2)
on
each
module
in
aa clockwise
direction
through
several
turns
until
it
hexagons
see
fig.
2)
on
each
module
in
clockwise
direction
through
several
turns
until
it
6) Resetting
reaches
its
stop
(note
this
is
a
left-hand
thread).
6)
Resetting
reaches
its stop (note this is a left-hand thread).
6.1) Manual Reset versions: Ensure that the disengaging sleeve (smaller hexagon) is tightened
6)
6.1)Resetting
Manual Reset
versions:
Ensure(larger
that the
disengaging
sleeve
(smaller
hexagon)
tightened
6)
Resetting
anti-clockwise
against
the adjuster
hexagon)
on each
module.
Rotate
eitheristhe
input
anti-clockwise
against
the
adjuster
(larger
hexagon)
on
each
module.
Rotate
either
the
inputare
6.1)
Manual
Reset
Ensure
that
the
disengaging
sleeve
(smaller
is
or
member
the torque
limiter
until
markers on
the periphery
of both members
6.1)output
Manual
Resetofversions:
versions:
Ensure
that
thethe
disengaging
sleeve
(smaller hexagon)
hexagon)
is tightened
tightened
or alignment.
output member
of the
torque
limiter
untilhexagon)
the markers
on the
periphery
of both
members
are
anti-clockwise
against
the
(larger
on
each
module.
Rotate
either
the
input
in
Tap
the
reset
pins with
a soft-faced
mallet
spring
back
to the
engaged
anti-clockwise
against
the adjuster
adjuster
(larger
hexagon)
on until
each they
module.
Rotate
either
the
input
in
alignment.
Tap
the
reset
pins
with
a
soft-faced
mallet
until
they
spring
back
to
the
engaged
or
position.
or output
output member
member of
of the
the torque
torque limiter
limiter until
until the
the markers
markers on
on the
the periphery
periphery of
of both
both members
members are
are
position.
in
alignment.
Tap
the
reset
pins
with
a
soft-faced
mallet
until
they
spring
back
to
the
engaged
in alignment.
Tapversions:
the reset The
pins torque
with a soft-faced
until they spring
to the
engaged
6.2)
Auto-Reset
limiter willmallet
reset automatically
withback
a loud
'click'
each
position.
6.2)
Auto-Reset
versions:
The
torque
limiter
will
reset
automatically
with
a
loud
'click'
each
position.
time the modules are aligned with their corresponding seats.
time
the
modules
are
aligned
with
their
corresponding
seats.
6.2)
6.2) Auto-Reset
Auto-Reset versions:
versions: The
The torque
torque limiter
limiter will
will reset
reset automatically
automatically with
with aa loud
loud 'click'
'click' each
each
time
the
modules
are
aligned
with
their
corresponding
seats.
time the modules are aligned with their corresponding seats.
7) Removing Modules
7) Removing Modules
7.1)..Reset the torque limiter before removing the modules (see section 6). Do not attempt
7)
Removing
Modules
7) remove
Removing
Modules
7.1)..Reset
torquewhich
limiterhas
before
theThe
modules
(see
section
not attempt
to
athe
module
notremoving
been reset.
energy
stored
in 6).
theDo
spring
when the
to
remove
a
module
which
has
not
been
reset.
The
energy
stored
in
the
spring
when the
7.1)..Reset
the
limiter
before
removing
the
(see
module
is tripped
could
cause
injury
or damage
to the module.
7.1)..Reset
the torque
torque
limiter
before
removing
the modules
modules
(see section
section 6).
6). Do
Do not
not attempt
attempt
module
is tripped
could
cause
or damage
to energy
the module.
to
a module
which
hasinjury
not
reset. The
stored
in
the
when the
to remove
remove
moduleare
which
not been
been
energywhich
stored
in they
the spring
spring
7.2)
If the amodules
to behas
re-used,
markreset.
them The
to identify
port
fit into.when the
module
is
injury
or
the
module
is tripped
tripped
could
cause
injurymark
or damage
damage
to
the module.
module.
7.2) If the
modulescould
are tocause
be re-used,
them toto
identify
which port they fit into.
7.3) If a switch plate is fitted, remove it, referring to section 10.
7.2)
modules
be
them
7.3) If
a switch
plateare
is to
fitted,
remove mark
it, referring
sectionwhich
10. port
7.2)
If the
the
modules
are
to
be re-used,
re-used,
mark
them to
totoidentify
identify
which
port they
they fit
fit into.
into.
7.3)
to section 10.
PT3-006
7.3) If
If aa switch
switch plate
plate is
is fitted,
fitted, remove
remove it,
it, referring
referring
10 to section 10.
July 2015
Supersedes Manual820
10
10
Rexnord
3001 W. Canal St., Milwaukee, WI 53208-4200 USA
866-REXNORD/866-739-6673 • www.rexnord.com
Autogard® Torque Limiters • Installation and Maintenance Instructions
820 Series
(Page 11 of 20)
7.4) Remove the four fixing screws from each module clamp ring, but do not disturb the
single clamp screw (sealed with red paint) which locks the clamp ring to the module body.
7.5) Withdraw the module, complete with clamp ring, from the unit. If it is tight, use levers
under the chamfered edges of the clamp ring.
7.6) Do not attempt to trip or reset a module which is not fitted into a torque limiter.
The energy stored in the spring when the module is tripped could cause injury or
damage to the module.
8) Re-fitting of Existing Modules into a Torque Limiter
8.1) If existing modules are to be re-fitted into their original ports with the original module
seats, and the module clamp screws have not been disturbed, proceed as follows; (otherwise
proceed as for new modules – see section 9).
8.2) Rotate either the input or output member of the torque limiter until the module ports are
aligned with the seats. Apply grease to the seats (see section 12 for suitable grease).
8.3) Fit the first module, complete with clamp ring, into its original port. Apply Loctite 243
or equivalent to the mounting ring fixing screws and tighten progressively to the torque shown
in table 1.
8.4) Fit the remaining modules in a diametrically opposite sequence to reduce unbalanced
loading of the bearing.
8.5) If a switch plate was fitted, re-fit it, referring to section 10.
8.6) Lubricate the modules as described in section 12.1.2.
9) Fitting New Modules to a Torque Limiter
9.1) Do not attempt to trip or reset a module which is not fitted into a torque limiter.
The energy stored in the spring when the module is tripped could cause injury or
damage to the module.
9.2) Rotate either the input or output member of the torque limiter until the module ports are
aligned with the seats. Apply grease to the seats (see section 12.1.2 for suitable grease).
9.3) The axial position of the module bodies in relation to the main unit is important, to
obtain the correct preload of the plungers. Proceed as follows for each module:
9.4) Ensure that the manual disengage sleeve (see fig. 2) is tightened (left hand thread)
against the adjuster. If the modules are not pre-set for a specific torque, it is important to
ensure that there is some preload in the module. To achieve this, back off the adjuster locking
set screws, then turn the adjuster clockwise until resistance is felt, plus one further turn.
9.5) Take the module and place under a hand press, supported on the adjuster, with the
plunger uppermost (see fig. 5).
Rexnord
3001 W. Canal St., Milwaukee, WI 53208-4200 USA
866-REXNORD/866-739-6673 • www.rexnord.com
PT3-006
July 2015
Supersedes Manual820
Autogard® Torque Limiters • Installation and Maintenance Instructions
(Page 12 of 20)
820 Series
Fig.5 Preparing a module for fitting
9.6) Press on the plunger so that it moves approximately 1mm and then slowly release the
force so the plunger springs back. This ensures the segments inside the module are in contact
with the cone of the plunger.
9.7) Screw the clamp ring onto the module as far as it will go by hand, with the chamfers
towards the plunger end of the module. Fit the clamp screw without Loctite, tighten, then
loosen slightly so the module can just rotate in the clamp ring.
9.8) Fit the module into its port, and tap on the end of the adjuster hexagon (not the reset pin)
with a mallet to make sure the module is fully seated (see fig. 6).
PT3-006
July 2015
Supersedes Manual820
Rexnord
3001 W. Canal St., Milwaukee, WI 53208-4200 USA
866-REXNORD/866-739-6673 • www.rexnord.com
Autogard® Torque Limiters • Installation and Maintenance Instructions
820 Series
(Page 13 of 20)
Fig.6 Fitting a new module
Fig.6
Fitting aa new
module
Fig.6
Fig.6 Fitting
Fitting a new
new module
module
9.9) Rotate the clamp ring or module body and use feeler gauges to obtain the specified gap
9.9)
Rotate
the clamp
ring
or
module
body and
use feeler
gauges
to
obtain
the
specified
gap
9.9)
Rotate
ring
or
module
feeler
gauges
to
obtain
the
specified
between
the the
ringclamp
and the
main
unit (seebody
tableand
4), use
whilst
maintaining
hand
pressure
on the gap
9.9)
Rotate
the
clamp
ring
or
module
body
and
use
feeler
gauges
to
obtain
the
specified
gap
between
the
ring
and
the
main
unit
(see
table
4),
whilst
maintaining
hand
pressure
on
the
between
the
ring
and
the
main
unit
(see
table
4),
whilst
maintaining
hand
pressure
on
the
adjuster
or
module
body
to
keep
the
module
seated.
between or
themodule
ring and
the to
main
unit
table seated.
4), whilst maintaining hand pressure on the
adjuster
body
keep
the(see
module
adjuster
adjuster or
or module
module body
body to
to keep
keep the
the module
module seated.
seated.
Table 4.
Table
4.
Table
4.
Module Clamp Ring Gap
Clamp Ring Gap
Clamp Screw Torque
TableUnit
4.
Module
Clamp
Ring
Gap
Clamp
Ring
Gap
Clamp
Screw
Torque
Module
Clamp
Ring
Gap
Clamp
Ring
Gap
Clamp
Screw
Torque
Unit
sub-assy
(except
AutoAuto-Reset
Module
Clamp
Ring
Gap
Clamp
Ring
Gap
Clamp
Screw
Torque
Unit
sub-assy
(except
AutoAuto-Reset
Unit
sub-assy
(except
AutoAuto-Reset
size
Reset)
sub-assy
(except
AutoAuto-Reset
size
Reset)
size
Reset)
1
0.20mm
(0.008”)
0.25mm
(0.010”)
3.3 Nm (2.4 lbf.ft)
size
Reset)
820-1 types
1
0.20mm (0.008”)
(0.008”) 0.25mm
(0.010”)
3.3
Nm
(2.4
lbf.ft)
1
0.20mm
0.25mm
(0.010”)
3.3
Nm
(2.4
lbf.ft)
820-1
types
1
0.20mm
(0.008”)
0.25mm
(0.010”)
3.3
Nm
(2.4
lbf.ft)
820-1
types
1,2,3
820-1
types
1,2,3
1,2,3
2
0.25mm (0.010”) 0.38mm (0.015”)
6.7 Nm (4.9 lbf.ft)
1,2,3
820-2
& -3
2
0.25mm (0.010”)
(0.010”) 0.38mm
(0.015”)
6.7
Nm (4.9
lbf.ft)
2
0.25mm
0.38mm
(0.015”)
6.7
820-2
&
-3
2
0.25mm (0.010”) 0.38mm (0.015”)
6.7 Nm
Nm (4.9
(4.9 lbf.ft)
lbf.ft)
820-2
&
-3
types
1,2,3
820-2
& -3
types 1,2,3
1,2,3
types
3
0.38mm (0.015”) 0.51mm (0.020”)
28.0 Nm (20.6 lbf.ft)
types 1,2,3
820-4
types
3
0.38mm (0.015”)
(0.015”) 0.51mm
(0.020”)
28.0
Nm
(20.6
lbf.ft)
3
0.38mm
0.51mm
(0.020”)
28.0
Nm
(20.6
lbf.ft)
820-4
types
3
0.38mm
(0.015”)
0.51mm
(0.020”)
28.0
Nm
(20.6
lbf.ft)
820-4
types
1,2,3
820-4
types
1,2,3
1,2,3
4
0.51mm (0.020”) 0.76mm (0.030”)
55.0 Nm (40.6 lbf.ft)
1,2,3
820-5
types
4
0.51mm (0.020”)
(0.020”) 0.76mm
(0.030”)
55.0
Nm
(40.6
lbf.ft)
4
0.51mm
0.76mm
(0.030”)
55.0
Nm
(40.6
lbf.ft)
820-5
types
4
0.51mm
(0.020”)
0.76mm
(0.030”)
55.0
Nm
(40.6
lbf.ft)
820-5
types
1,2,3
820-5
types
1,2,3
1,2,3
1,2,3
9.10) Mark the position of the module body in the clamp ring. Remove the clamp screw,
9.10) Mark
Mark the position
position of
of the module
module body
body in
in the clamp
clamp ring.
ring. Remove
Remove the
the clamp
clamp screw,
screw,
9.10)
apply Loctite
243position
or equivalent
and refit,
tightening
to thering.
torque
specified
tablescrew,
4, without
9.10)
Mark the
the
of the
the module
body
in the
the clamp
Remove
thein
clamp
apply
Loctite
243
or
equivalent
and
refit,
tightening
to
the
torque
specified
in
table
4, without
without
apply
Loctite
243
or
equivalent
and
refit,
tightening
to
the
torque
specified
in
table
4,
rotating
the
clamp
ring
relative
to
the
module
body.
apply
Loctite
243
or
equivalent
and
refit,
tightening
to
the
torque
specified
in
table
4,
without
rotating the
the clamp ring
ring relative
relative to
to the
the module
module body.
body.
rotating
9.11) Repeat
stages
9.4relative
to 9.10tofor
module.
rotating
the clamp
clamp
ring
theeach
module
body.
9.11)
Repeat
stages
9.4
to
9.10
for
each
module.
9.11)
9.4
to
each
module.
9.12) Repeat
For eachstages
module,
thefor
four
holes
in the clamp ring with those in the main unit,
9.11)
9.4 align
to 9.10
9.10
each
module.
9.12) Repeat
For each
eachstages
module,
align
thefor
four
holes
in the clamp
clamp ring
ring with those
those in the
the main
main unit,
unit,
9.12)
For
module,
align
the
four
holes
in
apply Loctite
243
or equivalent
the four
progressively
to main
the torque
9.12)
For each
module,
align theto
four
holesscrews
in the
the and
clamptighten
ring with
with
those in
in the
unit,
apply
Loctite
243
or
equivalent
to
the
four
screws
and
tighten
progressively
to
the
torque
apply
Loctite
243
or equivalent to the four screws and tighten progressively to the torque
specified
in table
apply
Loctite
2431.
specified
in table
table
1.or equivalent to the four screws and tighten progressively to the torque
specified
in
1.
Repeat inina diametrically
opposite sequence for the remaining modules.
specified
table 1.
Repeat in
in aa diametrically
diametrically
opposite sequence for
for the remaining
remaining modules.
Repeat
opposite
Repeat in a diametrically opposite sequence
sequence for the
the remaining modules.
modules.
Rexnord
3001 W. Canal St., Milwaukee, WI 53208-4200 USA
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PT3-006
13
13
13
13
July 2015
Supersedes Manual820
Autogard® Torque Limiters • Installation and Maintenance Instructions
(Page9.13)
14 of If
20)a
820
Series
switch plate was fitted, re-fit it, referring to section
10.
9.13)
If
a
switch
plate
was
fitted,
re-fit
it,
referring
to
section
10.
9.14) Lubricate the modules as described in section 12.1.2.
9.13)
If a switchthe
plate
was fitted,
re-fit it, in
referring
to
section 10.
9.14)
modules
as of
described
section
12.1.2.
9.15) Lubricate
Adjust the torque
setting
the modules
if necessary
(see section 4).
9.14)
Lubricate
modules
as of
described
section
12.1.2.
9.13)
a switch
plate
was
fitted,
re-fit
it, in
referring
to
section
10.section 4).
9.15) If
Adjust
thethe
torque
setting
the modules
if necessary
(see
9.15)
thethe
torque
setting
the modules
if necessary
9.14) Adjust
Lubricate
modules
as of
described
in section
12.1.2. (see section 4).
9.15)
AdjustPlate
the torque
setting
of the modules if necessary (see section 4).
10) Switch
Removal
and Refitting
10) Switch Plate Removal and Refitting
10.1)Switch
SomePlate
units Removal
are fittedand
withRefitting
a limit switch plate. A typical arrangement is shown in fig.7.
10)
10.1)
Some
units areassembly
fitted with
a limitfor
switch
plate.
A typical
arrangement
is shown
Refer
to
the
specific
drawing
further
detail.
To remove
the switch
plate, in
usefig.7.
a
10)
Switch
Plate
Removal
and
Refitting
10.1)
Some
units
are
fitted
with
a
limit
switch
plate.
A
typical
arrangement
is
shown
in
fig.7.
Refer
to
the
specific
assembly
drawing
for
further
detail.
To
remove
the
switch
plate,
use
spanner on the reset pin flats (behind the switch plate) to prevent rotation, and remove thea
Refer to
thethe
specific
assembly
drawing
for
further
detail.
To
remove
the switch
plate, in
use
a
10.1)
Some
arepin
fitted
a limit
switch
plate.
Atotypical
arrangement
is shown
fig.7.
spanner
on
reset
flats
(behind
the
switch
plate)
prevent
rotation,
and
remove
the
retaining
nuts,units
taking
care
towith
retain
the
springs
and
plastic
bushes.
spanner
on
the
reset
pin
flats
(behind
the
switch
plate)
to
prevent
rotation,
and
remove
the
Refer
to the
specific
drawing
further
remove the switch plate, use a
retaining
nuts,
takingassembly
care to retain
the for
springs
anddetail.
plasticTo
bushes.
retainingon
nuts,
care
to retain
plastic
bushes.rotation, and remove the
spanner
the taking
reset pin
flats
(behindthe
thesprings
switchand
plate)
to prevent
retaining nuts, taking care to retain the springs and plastic bushes.
Fig.7 Typical switch plate mounting
Fig.7 Typical switch plate mounting
Fig.7 Typical switch plate mounting
Typical
plate
10.2) On re-assembly, ensureFig.7
that the
partsswitch
are fitted
in mounting
the correct positions. Apply Loctite
10.2)
On
re-assembly,
ensure
that
the
parts
are
fitted
in
the
positions.
243 or equivalent to the switch plate retaining nuts. Hold thecorrect
reset pin
hexagonApply
with aLoctite
spanner
10.2)orOn
re-assembly,
ensure
that
theretaining
parts arenuts.
fittedHold
in the
correct
positions.
Apply
243
equivalent
to
the
switch
plate
the
reset
pin
hexagon
with
aLoctite
spanner
to prevent rotation, and ensure that the retaining nuts are pushed through the plastic bushes
as
243prevent
orOn
equivalent
toand
theensure
switchthat
plate
retaining
nuts.
Hold
thecorrect
resetthrough
pin
hexagon
with bushes
aLoctite
spanner
10.2)
re-assembly,
the
parts
are
fitted
in
the
positions.
Apply
to
rotation,
ensure
that
the
retaining
nuts
are
pushed
the
plastic
as
they are tightened, to avoid trapping the plastic bush between the retaining nut and reset pin.
to prevent
rotation,
ensure
that
retaining
nutsHold
are pushed
the
bushes
243
or
equivalent
the
switch
platethe
retaining
nuts.
the reset
pin hexagon
withreset
a spanner
they
arethread
tightened,
toand
avoid
trapping
the
plastic
bush
between
the through
retaining
nutplastic
and
pin.as
Check
size to
and
torque
tighten
to the
following
value;
they
arethread
tightened,
toand
avoid
trapping
the
plastic
bush
the through
retainingthe
nutplastic
and reset
pin.as
to
prevent
rotation,
ensure
that the
nutsbetween
are
pushed
bushes
Check
size and
torque
tighten
to retaining
the
following
value;
Check
thread
size
and
torque
tighten
to
the
following
value;
they are tightened, to avoid trapping the plastic bush between the retaining nut and reset pin.
Check thread
and torque torque
tighten to the following value;
Thread
size sizeTightening
Thread size
Tightening torque
M12
10Nm
Thread size
Tightening torque
M12
10Nm
Thread
Tightening torque
M16
30Nm
M12 size
10Nm
M16
30Nm
M12
10Nm
M16
30Nm
M16
30Nm
11) Seat Replacement
11) Seat Replacement
11.1)Seat
Remove
the modules as described in section 7.
11)
Replacement
11.1) Remove the modules as described in section 7.
11)
Replacement
11.2)Seat
screw from
the centreinofsection
the seat.
11.1)
Remove
the modules
as described
7. Remove the seat using an extractor
11.2)
Remove
the
screw
from
the
centre
of
the
seat.
Remove the
seatthread
usingsize).
an extractor
screwed into thethe
tapped
holeasindescribed
the centreinofsection
the seat
5 for
The force
11.1)
modules
7. (see tablethe
11.2) Remove
Remove
screwhole
frominthe
seatthread
usingsize).
an extractor
screwed
into thethe
tapped
thecentre
centreof
ofthe
theseat.
seat Remove
(see table 5 for
The force
screwed
into thethe
tapped
thecentre
centreof
ofthe
theseat.
seat Remove
(see tablethe
5 for
The force
11.2)
Remove
screwhole
frominthe
seatthread
usingsize).
an extractor
PT3-006
screwed into the tapped hole in the centre of the seat (see table 5 for thread size). The force Rexnord
July 2015
Supersedes Manual820
14
14
14
3001 W. Canal St., Milwaukee, WI 53208-4200 USA
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Torque
Limiters
• Installation
andso
Maintenance
Instructions
from the extractor should Autogard
be reacted® by
the metal
surrounding
the seat,
that the torque
limiter bearing is not loaded.
A suitable arrangement is shown in fig. 8.
820 Series
(Page 15 of 20)
from the extractor should be reacted by the metal surrounding the seat, so that the torque
Table 5.
limiter bearing is not loaded. A suitable arrangement is shown in fig. 8.
from
by thesub-assembly
metal surrounding the Thread
seat, sosize
thatinthe
torque
Unit should be reacted
Module
seat
Tablethe
5. extractor
limiter bearing is not loaded. A suitable arrangement is shown in fig. 8.
size
Unit
Module sub-assembly
Thread size in seat
Table 5.
820-1 types 1,2,3
1
M6
size
Unit
Module sub-assembly
Thread size in seat
820-2
& -3
types
1,2,3
21
M8
820-1
types
1,2,3
M6
size
820-4
types
1,2,3
32
M12
820-2
& -3
types
1,2,3
M8
820-1 types 1,2,3
1
M6
820-5
types
1,2,3
4
M16
820-4 types 1,2,3
3
M12
820-2 & -3 types 1,2,3
2
M8
820-5 types 1,2,3
4
M16
820-4 types 1,2,3
3
M12
11.3) To fit the new seat first ensure that the hole is free from old adhesive. Degrease the hole
and the
newtypes
seat,1,2,3
and apply Loctite 641 or equivalent
to the outside diameter
820-5
4
M16 of the seat. Push
11.3)
To
fit
the
new
seat
first
ensure
that
the
hole
is
free
from
old
adhesive.
Degrease
the new seat
from
fully
the home
extractor
and should
fit the seat
be reacted
retaining
byscrew,
the metal
using
surrounding
Loctite 243
theorseat,
equivalent
so thatthe
on
thehole
the
torque
and the and
new
seat,bearing
and
apply
Loctite
641A
or
equivalent
the outside
diameter
of
thread,
limiter
torque
tighten
is to
not
the
loaded.
value
given
suitable
in table
arrangement
1.toRemove
is any
shown
excess
in fig.
adhesive.
8. the seat. Push
the
new
fullynew
home
fitensure
the seatthat
retaining
243 or Degrease
equivalentthe
onhole
the
11.3)
Toseat
fit the
seatand
first
the holescrew,
is freeusing
fromLoctite
old adhesive.
11.4) Lubricate
Table 5.
the seats and fit the modules, referring to sections 8 or 9 as appropriate.
thread,
tighten
the value
in table 1.toRemove
any diameter
excess adhesive.
and the and
newtorque
seat, and
applytoLoctite
641given
or equivalent
the outside
of the seat. Push
the
new
seat
fully
home
and
fit
the
seat
retaining
screw,
using
Loctite
243
or
equivalent
onseat
the
Unitand fit the modules,Module
sub-assembly
size in
11.4) Lubricate the seats
referring
to sections 8 or 9 as Thread
appropriate.
thread, and torque tighten
the valueofgiven
in table
1. Remove any excess adhesive.
Fig.8to Method
removing
seat
size
11.4) Lubricate the seats and fit the modules, referring to sections 8 or 9 as appropriate.
820-1 types
M6
Fig.81,2,3
Method of removing seat1
820-2 & -3 types 1,2,3
2
M8
Fig.8 Method of removing seat
820-4 types 1,2,3
3
M12
820-5 types 1,2,3
4
M16
11.3) To fit the new seat first ensure that the hole is free from old adhesive. Degrease the hole
and the new seat, and apply Loctite 641 or equivalent to the outside diameter of the seat. Push
the new seat fully home and fit the seat retaining screw, using Loctite 243 or equivalent on the
thread, and torque tighten to the value given in table 1. Remove any excess adhesive.
11.4) Lubricate the seats and fit the modules, referring to sections 8 or 9 as appropriate.
12) Routine Maintenance
Fig.8 Method of removing seat
12.1) All Types
12) Routine Maintenance
12.1.1) The frequency of maintenance will depend on the operating environment and number
12.1) All Types
of
but once
every three months should be adequate in most applications. Proceed as
12)trips,
Routine
Maintenance
12.1.1)
The
frequency
of maintenance will depend on the operating environment and number
follows:
12.1)
All
Types
of trips, but once every three months should be adequate in most applications. Proceed as
12.1.2) A grease nipple is located in the end of each module, and some units have additional
follows: The frequency of maintenance will depend on the operating environment and number
12.1.1)
grease nipples for the bearings and the module seats. Apply a good quality lithium grease such
of
trips, but
once every
three
months
should
be adequate
in most applications.
Proceed
as
12.1.2)
A grease
nipple
is Energrease
located
in the
end
module,
units
have
additional
as
Shell Alvania
R3
or BP
LS3
toof
alleach
grease
points.and
A some
general
inspection
of the
follows:
grease
nipples
bearingsatand
module
seats.that
Apply
a good quality
lithium
unit
should
alsoforbethe
performed
thisthetime,
checking
all fasteners
are tight
etc. grease such
as Shell Alvania
or BP
LS3
toof
alleach
grease
points.and
A some
general
inspection
of the
12.1.2)
A greaseR3
nipple
is Energrease
located in the
end
module,
units
have additional
unit should
alsoforbethe
performed
thisthetime,
checking
all fasteners
are tight
etc. grease such
grease
nipples
bearingsatand
module
seats.that
Apply
a good quality
lithium
as Shell Alvania R3 or BP Energrease LS3 to all grease points. A general inspection of the
15 that all fasteners are tight etc.
unit should also be performed at this time, checking
Rexnord
3001 W. Canal St., Milwaukee, WI 53208-4200 USA
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12) Routine Maintenance
PT3-006
15
July 2015
Supersedes Manual820
Autogard® Torque Limiters • Installation and Maintenance Instructions
12.1.3) For manual disengage versions each module should be manually disengaged then reset
Series
maintenance
procedure
(refer
sections
5 and820
6).manually
12.1.3) For manual
disengage
versions
eachtomodule
should
be
disengaged then reset
12.1.3) For manual disengage versions each module should be manually disengaged then reset
as
part
of
the
maintenance
procedure
(refer
to
sections
5
and
6).
12.1.4)
For
unusual
conditions
such
as
high
ambient
temperatures,
high
vibration
or dirty
12.1.3)
disengage
versions
eachtomodule
should
as part of themanual
maintenance
procedure
(refer
sections
5 andbe
6).manually disengaged then reset
environment,
special
maintenance
may
be
required.
Please
consult
Autogard.
12.1.3)
disengage
versions
each
module
should
be
disengaged
as
part ofFor
themanual
maintenance
procedure
(refer
toambient
sections
5 and
6).manually
12.1.4)
For
unusual
conditions
such
as
high
temperatures,
high vibration
or then
dirtyreset
12.1.4)
For
unusual
conditions
such
as
high
ambient
temperatures,
high
vibration
or
dirty
as
part820
of the
maintenance
procedure
(refer
to sections
5 and
6). Autogard.
environment,
special
maintenance
may
be
required.
Please
consult
12.2)
Type
1 only
12.1.4)
For
unusual
conditions
such
as
high
ambient
temperatures,
high
vibration
or
dirty
environment, special maintenance may be required. Please consult Autogard.
12.1.4)
For
unusual
conditions
such
asbe
high
ambientPlease
high
vibration
orelement
dirty
environment,
special
maintenance
may
required.
consult Autogard.
12.2) 820
Type
1inspection
only
12.2.1)
Periodic
of the
flexible
elements
istemperatures,
recommended.
Remove
each
12.2)
820 Type
1 only
environment,
special
maintenance
may
be
required.
Please
consult
Autogard.
sub-assembly
by 1removing
the
screw,elements
and withdrawing
the element,
washers
sleeve.
12.2)
Type
only
12.2.1)820
Periodic
inspection
of fixing
the flexible
is recommended.
Remove
eachand
element
12.2.1)
Periodic
inspection
of the be
flexible
elements
is
recommended.
Remove
each element
The
element
sub-assembly
should
replaced
when
the
wall
thickness
of
the
elastomeric
part
12.2)
820
Type
1
only
sub-assembly
by removing
screw,elements
and withdrawing
the element,
washers
sleeve.
12.2.1)
Periodic
inspectionthe
of fixing
the flexible
is recommended.
Remove
eachand
element
sub-assembly
by
removing
the
fixing
screw,
and
withdrawing
the
element,
washers
and
sleeve.
reaches
the minimum
value shownbe
in replaced
table 6. All
elements
unit should
be replaced part
at the
The
element
sub-assembly
when
therecommended.
wallinthickness
of the
elastomeric
12.2.1)
Periodic
inspectionshould
of fixing
the be
flexible
elements
is
Remove
eachand
element
sub-assembly
by removing
the
screw,
and
withdrawing
the element,
washers
sleeve.
The
element
sub-assembly
should
replaced
when
the wall thickness
of the
elastomeric
part
same
time.
reaches
the minimum
valueshould
shown
in screw,
table 6.and
All
elements
the unit
should
be replaced
at the
sub-assembly
by removing
fixing
withdrawing
element,
washers
and sleeve.
The
element
sub-assembly
be
when
the wallin
of the
elastomeric
part
reaches
the minimum
valuethe
shown
in replaced
table 6. All
elements
inthickness
the unit
should
be replaced
at the
same
time.
The
element
sub-assembly
should
be
replaced
when
the
wall
thickness
of
the
elastomeric
part
reaches
the
minimum
value
shown
in
table
6.
All
elements
in
the
unit
should
be
replaced
at the
same time.
reaches
the
minimum
value
shown
in
table
6.
All
elements
in
the
unit
should
be
replaced
at
the
same
time.
Table 6.
same time.
Table 6.
Unit
Minimum wall thickness
Table 6.
Table 6.
Unit
Minimum
wall thickness
820-1
type 1
3.3mm (0.130”)
Unit
Minimum wall thickness
Table 6.
Unit type 1
Minimum
wall thickness
820-1
3.3mm
820-2
4.7mm (0.130”)
(0.185”)
820-1
type
1
3.3mm
(0.130”)
Unit
Minimum wall thickness
820-1 type
type 11
3.3mm (0.197”)
(0.130”)
820-2
4.7mm
(0.185”)
820-3
5.0mm
820-2 type 1
4.7mm (0.130”)
(0.185”)
820-1
3.3mm
820-2
type 11
4.7mm (0.197”)
(0.185”)
820-3
5.0mm
820-4 type
820-3 type 1
5.0mm (0.197”)
820-2
4.7mm
(0.185”)
820-3
5.0mm
820-4
type 11
5.0mm (0.197”)
(0.197”)
820-5 type
820-4 type 1
820-3
5.0mm (0.197”)
820-4
5.0mm
820-5 type
type 11
5.0mm (0.197”)
(0.197”)
820-5 type 1
820-4
5.0mm (0.197”)
820-5
1
5.0mm (0.197”)
12.2.2)type
Re-assemble
as described in section 3.3.1.
820-5 type 1
5.0mm (0.197”)
12.2.2) Re-assemble as described in section 3.3.1.
12.2.2) Re-assemble as described in section 3.3.1.
12.2.2)
Re-assemble
as described in section 3.3.1.
12.3) 820
Type 2 only
12.2.2) Re-assemble as described in section 3.3.1.
12.3)
820 Type
only
The condition
of2the
elastic insert should be checked after the first 3000 hours, and at
12.3) 820 Type 2 only
convenient
intervals
thereafter.
The
life ofbethechecked
insert under
average
conditions
12.3)condition
820 Type
only
The
of2the
elastic insert
should
after the
first 3000
hours,will
andbeat
The
condition
of
the
elastic
insert
should
be
checked
after
the
first
3000
hours,
and at
approximately
25000
hours. Proceed
as of
follows:
12.3)
820 Type
2 only
convenient
intervals
thereafter.
The
life
thechecked
insert under
average
conditions
will
The
condition
of
the
elastic
insert
should
be
after
the
first
3000
hours,
andbe
convenient intervals thereafter. The life of the insert under average conditions will
beat
approximately
25000
hours.
Proceed
as
follows:
12.3.1)
Remove
two locking
set
screws
from
theunder
Samiflex
ring.3000
The
condition
of
the
elastic
insert
should
be
checked
after
the
first
hours,
and
convenient
intervals
thereafter.
The
life
of
the
insert
average
conditions
will
beat
approximately 25000 hours. Proceed as follows:
convenient
intervals
thereafter.
The
life
thefrom
insert
average
approximately
25000
hours.
Proceed
as of
follows:
12.3.1)
two
locking
screws
theunder
Samiflex
ring.conditions will be
12.3.2) Remove
Move
thethe
ring
over
the
S2sethub.
12.3.1)
Remove
the two
locking
set screws
from the Samiflex ring.
approximately
25000
hours.
Proceed
as follows:
12.3.1)
Remove
two
locking
screws
the Samiflex
ring.
12.3.2)
thethe
ring
over
the S2set
hub.
12.3.3) Move
Remove
the
elastic
insert
and
inspectfrom
for wear,
referring
to fig. 9 and table 7. Discard
12.3.2)
Move
thethe
ring
over
the S2sethub.
12.3.1)
Remove
two
locking
screws
from
the
Samiflex
ring.
the
insert
if
it
is
worn
beyond
the
limit
shown.
12.3.2) Remove
Move thethe
ring
over insert
the S2and
hub.
12.3.3)
elastic
inspect for wear, referring to fig. 9 and table 7. Discard
12.3.3)
Remove
the
elastic
insert
and
inspect for wear, referring to fig. 9 and table 7. Discard
12.3.2)
Move
the
ring
over
the
S2
hub.
the
insert
if
it
is
worn
beyond
the
limit
shown. for wear, referring to fig. 9 and table 7. Discard
12.3.3)
the elastic
and inspect
the insertRemove
if it is worn
beyondinsert
the limit
shown.
12.3.3)
the elastic
and inspect
the
insertRemove
if it is worn
beyondinsert
the limit
shown. for wear, referring to fig. 9 and table 7. Discard
the insert if it is worn beyond the limit shown.
(Pageas16
of 20)
part
of the
Fig.9 Inspecting the elastic insert for wear
PT3-006
July 2015
Supersedes Manual820
Fig.9 Inspecting the elastic insert for wear
Fig.9 Inspecting the elastic insert for wear
Fig.9 Inspecting the elastic insert for wear
Fig.9 Inspecting the16
elastic insert for wear
16
16
16
Rexnord
3001 W. Canal St., Milwaukee, WI 53208-4200 USA
866-REXNORD/866-739-6673 • www.rexnord.com
Autogard® Torque Limiters • Installation and Maintenance Instructions
820 Series
(Page 17 of 20)
Table 7.
Unit
Dimension ‘h’ minimum
Dimension ‘X’ maximum
820-1 type 2
28.0 mm (1.102”)
6.0 mm (0.236”)
820-2 type 2
36.0 mm (1.417”)
7.5 mm (0.295”)
820-3 type 2
37.5 mm (1.476”)
7.5 mm (0.295”)
820-4 type 2
42.0 mm (1.654”)
8.5 mm (0.335”)
820-5 type 2
60.0 mm (2.362”)
10.0 mm (0.394”)
12.3.4) Re-assemble using either the existing insert or a new insert,as appropriate, referring to
sections 3.4.3 to 3.4.5.
13) Fault-Finding
See table 8. If in doubt consult Autogard.
14) Spare Parts
For spare module sub-assemblies or other parts, consult Autogard, quoting the part number
and serial number from the label on the torque limiter body.
If the modules are being replaced because they are worn it is also advisable to replace the
seats.
Rexnord
3001 W. Canal St., Milwaukee, WI 53208-4200 USA
866-REXNORD/866-739-6673 • www.rexnord.com
PT3-006
July 2015
Supersedes Manual820
Autogard® Torque Limiters • Installation and Maintenance Instructions
(Page 18 of 20)
820 Series
Table 8 Fault-finding
Fault
Possible Cause
Action
Frequent tripping
Fault in driven machine
Rectify
Torque setting too low
Adjust trip torque
All modules not reset
Reset all modules
(manual reset)
module not resetting (auto-reset)
lubricate or replace module
(possible lack of lubrication)
Failure to trip on overload
Excessive backlash
PT3-006
July 2015
Supersedes Manual820
Worn module plungers or seats
Replace worn parts
Torque setting too high
Adjust trip torque
Module seized
manually disengage (not auto-reset)
(possible lack of lubrication)
lubricate or replace module
Torque limiter bearing seized
Replace bearing
Modules loose or incorrectly fitted
Follow installation procedure
Worn module plungers or seats
Replace worn parts
Worn torque limiter bearing
Replace bearing
Worn coupling or loose fasteners
Replace worn parts, tighten fasteners
Rexnord
3001 W. Canal St., Milwaukee, WI 53208-4200 USA
866-REXNORD/866-739-6673 • www.rexnord.com
Autogard® Torque Limiters • Installation and Maintenance Instructions
820 Series
(Page 19 of 20)
Notes
Rexnord
3001 W. Canal St., Milwaukee, WI 53208-4200 USA
866-REXNORD/866-739-6673 • www.rexnord.com
PT3-006
19
July 2015
Supersedes Manual820
Autogard® Torque Limiters • Installation and Maintenance Instructions
(Page 20 of 20)
820 Series
Addresses of spare parts stockists and service facilities
Addresses of spare parts stockists and service facilities
Addresses of spare parts stockists and service facilities
British Autogard Ltd
Rexnord Industries
Autogard
Rexnord
Industries
British British
Autogard
Ltd Ltd
American
Autogard
Corporation
th W Canal St
2 Wilkinson
Road, Cirencester
3001
2 Wilkinson
Road,
5173
26
Avenue
2 Wilkinson Road, Cirencester
3001 W Canal St
Love Lane
Estate,
Rockford,
IL 61109
Glos,Industrial
GL7 1YT
Milwaukee,
WI 53214
Glos, GL7 1YT
Milwaukee, WI 53214
Cirencester,
U.S.A.
England
U.S.A.
GL7 1YT
U.S.A.
England
England
Tel: +44 (0)1285 640333
Tel: +1 866-REXNORD
Tel:(0)1285
+44 (0)1285
640333
+1 866-REXNORD
Tel: +44
640333
Tel: Tel:
+1 815
229 3190
Fax:
+44
(0)
1285
659476
Fax: +44
(0)+44
1285
Fax: +1 815 229 4615
Fax:
(0)659476
1285 659476
Email: customerservice.ba@rexnord
.com Email:
customerservice.aa@rexnord.com
Email: customerservice.ba@rexnord.com
Email:
customerservice.aa@rexnord.com
Email: customerservice.ba@rexnord.com Email: customerservice.aa@rexnord.com
Autogard Asia-Pacific Pty Ltd
Unit 17,Autogard
56 KeysAsia-Pacific
Road
Pty Ltd
Autogard
Asia-Pacific
Cheltenham,
Victoria
3192 Pty Ltd
Unit 17, 56 Keys Road
Australia
Unit 17, 56 Keys Road
Cheltenham, Victoria 3192
Cheltenham, Victoria 3192
Tel: +61
(0) 39532 0901
Australia
Australia
Fax: +61
(0) 39532 1032
Email: sales.au@autogard.com
Tel: +61 (0) 39532 0901
Tel: +61 (0) 39532 0901
Fax: +61 (0) 39532 1032
Fax: +61 (0) 39532 1032
PT3-006
July 2015
Supersedes Manual820
20
Rexnord
3001 W. Canal St., Milwaukee, WI 53208-4200 USA
866-REXNORD/866-739-6673 • www.rexnord.com