Rotary Saws
SECTION: Tools and Equipment
ISSUED: 02-2011
REVISED: 02-2012
Objectives
• To provide an understanding of the
following
– Specifications
– Use
– Maintenance
– Safety
Specifications
• Engine
– 2 stroke
– Carbureted
– Electric ignition
– Air cooled
• Fuel mixture- 50:1 premix
• Spark plug gap- .02” or
.5mm
• 3 stage air filter
• Belt drive: V-belt with
manual tensioner
• Reversible cutting arm
– Inboard and outboard
cutting positions
• Decompression valve for
easy starts
– TS400 and TS510
• Blade size
– TS360 and TS400: 12
inches
– TS510 and K970: 14
inches
• Cut depth
– 12” blade: 4”
– 14” blade: 5”
Uses
• Cuts-metal, reinforced
concrete, masonry,
wood, and plastics
• Primarily used in
forcible entry
• Great tool for RIC due
to ability to cut many
materials
• Breaking and
breaching operations
Blades
Black Star Diamond Blade
• Cuts any type of material
– Not optimal to cut wood
• Diamond chip cutting
surface
• Wet or dry blade
• Must use orange arbor
spacer
• Bi-directional
• Lasts 150 Xs longer than
abrasive blade
Blades
Diamond Chunk
• Cuts wood, sheet metal, stucco and other like
building materials
• Diamond chunk cutting surface
• Bi-directional
Blades
Composite Metal Abrasive
•
•
•
•
Cuts metal
Bi-directional
Do not store in same compartment as gasoline
Never use if cracked, warped or water soaked
– Can shatter creating shrapnel
Blades
Diamond Abrasive Masonry
• Cuts masonry and reinforced concrete
• Wet or dry
• Cuts in one direction
Blades
Composite Masonry Abrasive
• Cuts masonry, concrete and reinforced concrete
• Do not store in same compartment as gasoline
• Never use if cracked, warped or water soaked
– Blade can shatter creating shrapnel
• Bi-directional
TS 510 Controls
•
•
•
•
Stop
Choke
Trigger lock
Throttle
• Throttle interlock
• Decompression valve
TS 510 Start Up Procedure
• Saw should be in ready to run settings
– Stop switch in on position, decompression valve depressed,
choke on and throttle engaged with trigger lock
• Pull start until engine fires
– Use quick pulls not pulling cord out completely
– Engine will fire but not run
• Switch choke off
• Pull start again until engine fires
• Depress throttle interlock and depress throttle
– This disengages the trigger lock
• Saw is ready to run
TS 400 Controls
•
•
•
•
Throttle lock/off
Throttle interlock
Throttle
Decompression valve
• Choke/half choke
TS 400 Start Up Procedure
• Saw should be in ready to run settings
– Stop switch in on position, decompression valve depressed,
choke on and throttle engaged with trigger lock
• Pull start until engine fires
– Use quick pulls not pulling cord out completely
– Engine will fire but not run
• Switch choke to ½ choke
• Pull start again until engine fires
• Depress throttle interlock and depress throttle
– This disengages the trigger lock
• Turn choke to off position
• Saw is ready to run
TS 360 Controls
• Stop
• Trigger lock
• Choke
– Pull to engage
• Throttle
• Throttle interlock
TS 360 Start Up Procedure
• Saw should be in ready to run settings
– Stop switch in the “on” position, decompression valve
depressed, choke on, and the throttle engaged with trigger lock
• Pull start until engine fires
– Use quick pulls not pulling cord out completely
– Engine will fire but not run
• Push choke in
– Choke can be pushed in ½ way to act as ½ choke if saw is not
starting
• Pull start again until engine fires
• Depress throttle interlock and depress throttle
– This disengages the trigger lock
• Push choke in if not already done so
• Saw is ready to run
K-12 FD
Husqvarna K970
• Compression release
• Choke
– (activates throttle lock)
• Stop
• Priming pump
• Throttle and interlock
K-12 FD
Husqvarna K970
•
•
•
•
•
•
•
94cc, 2-cycle Air Cooled Gas Engine
Large “D” Handle Starter Grip
“D” Ring for Sling Attachment
14” Diameter Blade; 5” Cutting Depth
Reflective Fire Department Lettering
Excellent Ergonomics - Slimmer Design, Perfect Balance
Most Technological Advances
– Active Filtration, SmartCarb Carburetor,
Decompression Relief Valve, Enclosed Transmission,
“Ready Start” Ignition Switch
K970 Start Up Procedure
• Saw should be kept ready to run
– Compression release depressed, choke on, and the
throttle engaged with trigger lock engaged
– Throttle is locked open when choke is pulled
• Press priming pump 6 times
• Pull start cord until engine fires
– Use quick pulls not pulling cord out completely
– Engine will fire but not run
K970 Start Up Procedure
• Push choke in
– Choke can be pushed in ½ way to act as ½ choke if
saw is not starting
• Pull start again until engine fires
• Depress throttle interlock and depress throttle
– This disengages the trigger lock
• Push choke in if not already done so
• Saw is ready to run
Start Up Procedure
Tips and Trouble Shooting
• If saw is warm and you need to restart choke is
not needed
• Older saws may need to warm up or run at low
RPM’s briefly to avoid saw from dying initially
• If saw becomes flooded
– You can tell when exhaust smells like gas
– Pull cord repeatedly with choke off and throttle not depressed
• If saw is hard to start or after being cleared after
flooding
– Have someone depress throttle completely with choke off and
pulling the pull start repeatedly
Blade Position
• Outboard
– Better for forcible entry
applications
– Allows to cut close to
walls or ground
– Gyro effect increased
• Inboard
– Used primarily in
masonry cutting
applications
– Saw better balanced
– Gyro effect decreased
Changing Blade Position
• Remove the 3 bolts
• Remove cutting head
and guard from cast
arm
Changing Blade Position
• Put cutting head on desired
side and place the v-belt on
the v-belt pulley
• Replace the three bolts only
hand tight
Changing Blade Position
• Tensioning V-belt
– Using scrench turn
tensioner
clockwise
• Check tension on v-belt
– V-belt is correctly
tensioned when it can
be slightly depressed
in the middle when
Changing Blade Position
• While maintaining tension tighten a bolt
• After one bolt is tight you can release tension
and tighten the remainder of bolts
Changing Blades
• Place arbor wrench in hole on guard
• Unscrew bolt on blade
• Remove thrust washer and blade
Changing Blade
• Replace blade
– Ensure proper arbor
spacer is used for blade
• Replace thrust washer
and line up flanges
• Tighten bolt and remove
arbor wrench
Maintenance
•
•
•
•
•
•
Use air compressor to blow off dirt
Use degreaser to clean dirt
Inspect spark plug for proper gap and condition
Inspect V-belt for wear and proper tension
Inspect all bolts for proper tightness
Inspect blades for damage and wear
– Diamond blades may become gummed up when
cutting soft metals, they can be cleaned by cutting
into concrete
Maintenance
• Cleaning air filter
–
–
–
–
Close choke before removing filter
Remove filter cover and clean
Clean around filter
Outer filter can be blown out and/or washed with
degreaser, only replace when dry
– If main filter is dirty and/or saw performance is
decreased, replace filter
– Auxiliary filter should only need replacing if main filter
fails
Safety
• Proper PPE
– Gloves, eye protection, hearing protection and proper clothing
dust mask if needed
• Do not use in flammable atmosphere
• If using in an enclosed environment provide proper ventilation
• Use proper blade for cutting application
• Do not use damaged blades
• Do not exceed blades maximum RPM
• Adjust guard to deflect sparks
• Be aware of where sparks are flying
– Have extinguishing if needed incase of accidental fire
• Ensure other personnel are clear of cutting area
• Avoid cutting overhead