Y20BKT-1 Replacement Bracket Kit
for M100 Series Motor Actuators
Kit Includes
Table 1: Y20BKT-1 Kit Components
Item
Description
D
Qty
A
Motor Face Mounting
Bracket
1
B
Motor Support Mounting
Bracket
1
C
Gear Housing Bracket
1
D
Hex-head Screws
5
E
Thread-forming Screws
3
A
E
B
C
Figure 1: Y20BKT-1 Kit
Components
Rack and Coupler
Assembly
M100
Gear Housing
Assembly
Locking Screw
Crank Arm
Ball Joint
B
90
°A
Locking
Screw
C
D
E
Linkage Rod
Motor Face
Mounting
Bracket
Gear Housing
Bracket
Motor Support
Mounting Bracket
Blade Pin Extension
Universal Mounting Bracket
Figure 2: Typical Y20DFC-1 Damper Linkage Installation
(Bracket kit components shown shaded.)
© 1998 Johnson Controls, Inc.
Part No. 34-636-259, Rev. A
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Printed in U.S.A.
Motor Support
Mounting Bracket
Universal
Mounting Bracket
Hex-head Tapping
Screws (4)
Figure 3: Screw Replacement for Motor Support Mounting Bracket
Changeout Procedure
Tools Required: Phillips-head screwdriver, No. 2
Hex-socket screwdriver (or nut driver), 5/16 inch socket size
1.
Unpack the Y20BKT-1 Kit and select the parts required for replacement.
Refer to Figure 1 as needed.
2.
To gain access to the parts requiring replacement, remove the Gear
Housing Bracket (Item C) by using a 5/16 inch nut driver to loosen the screw
securing it to the universal mounting bracket. Slide the Gear Housing
Bracket off, and if undamaged, retain it for reinstallation.
3.
Mark the rack position (so that it can be reinstalled in exactly the same
position). Slide the gear housing with attached rack and coupler assembly
off of the actuator shaft, then lift the actuator up and out. (See Figure 2.)
4.
To replace the Motor Support Mounting Bracket (Item B), use a 5/16 inch
nut driver to loosen the four screws retaining it to the universal mounting
bracket. Slide the damaged bracket up and off. Line up the four keyhole
slots on the new bracket with the four screws and slide it firmly down into
place. Retighten the screws (Item D), replacing any that are damaged.
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M100
Gear Housing
Assembly
Rack and Coupler
Assembly
Figure 4: Motor Face Mounting Bracket Installation
5.
To replace the Motor Face Mounting Bracket (Item A), use a
No. 2 Phillips-head screwdriver to remove the three screws that secure the
bracket to the actuator. Pull off the damaged bracket and secure the new
one in place, replacing damaged screws (Item E) as necessary. (See
Figure 4.)
6.
To reinstall the actuator, line up the tabs on the Motor Support Mounting
Bracket (Item B) with the slots on the Motor Face Mounting Bracket and set
the actuator completely in place.
7.
Reattach the rack and coupler assembly by sliding the gear housing back
onto the actuator shaft, taking care to reinstall the assembly exactly as it
was originally positioned. (See Figure 4.)
8.
Align the keyhole slot on the Gear Housing Bracket (Item C) with the slotted
screw on the universal mounting bracket and slide it securely into place.
9.
After reinstallation and wiring of the actuator are complete, make system
settings and apply power. Observe at least three complete operating cycles
as the actuator modulates on command from the controller. Refer to the
controller documentation as needed.
!
CAUTION: Equipment Damage Hazard. The actuator must be free to
complete its full stroke without stalling or mechanical
binding, or damage to the motor actuator will result.
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Additional Y20DFC-1 Linkage Kit Repair Parts and Accessories
Table 2: Y20DFC-1 Linkage Kit Components
Item
Description
Product Code Number
F
Replacement Gear Kit
G
Universal Mounting Bracket
DMPR-KC251
Y20DGR-1
H
7 Inch Blade Pin Extension
DMPR-KC003
I
Crank Arm, 1/2 inch shaft,
adjustable to 2-3/4 inches
DMPR-KC053
J
Ball Joint Swivel (2)
K
Blade Arm with 2 D-Washers
L
Linkage Replacement
D-3073-604
DMPR-KC054
D-3153-103
F
G
H
K
J
I
L
CD E
90° A B
Figure 5: Additional Y20DFC-1 Damper Linkage Repair Parts
(Available separately.)
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