1. Rotary Saws SECTION: Tools and Equipment
ISSUED: REVISED:

2. Objectives To provide an understanding of the following Specifications
Use
Maintenance
Safety

3. 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(FD): 14 inches
Cut depth
12” blade: 4”
14” blade: 5”

4. 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

5. 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

6. Blades Diamond Chunk
Cuts wood, sheet metal, stucco and other like building materials
Diamond chunk cutting surface
Bi-directional

7. 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

8. Blades Diamond Abrasive Masonry
Cuts masonry and reinforced concrete
Wet or dry
Cuts in one direction

9. 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

10. K-12 FD Husqvarna K970 Compression release Choke Stop Priming pump
(activates throttle lock)
Stop
Priming pump
Throttle and interlock

11. 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

12. 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 (if applicable)
Kneel on saw with low weight if possible to start (avoid steeping on saw due to fuel tank and fire boot width)
Pull start cord until engine fires
Use quick pulls not pulling cord out completely
Engine will fire but not run

13. 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

14. 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

15. Blade Position Outboard Inboard 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

16. Changing Blade Position
Remove the 3 bolts
Remove cutting head and guard from cast arm

17. 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

18. 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

19. Changing Blade Position
While maintaining tension tighten a bolt
After one bolt is tight you can release tension and tighten the remainder of bolts

20. Changing Blades Place arbor wrench in hole on guard
Unscrew bolt on blade
Remove thrust washer and blade

21. 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

22. Belt Tension
Checked daily
Loosen bolts
tighten pressure spring

23. 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

24. 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

25. 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

26. Check them daily! Different SOGs
Checking our saws daily, just like our SCBA or any other tool, ensures that we are ready for combat.
“I hope the metal cutting blade is on there.”

27. Take the time to check your saw
On the drill ground and around the station we start building habits (good and bad)
Training with and performing the daily check form a basis of understanding
Every saw is a little different
Become accustomed to the weight and balance of the different saws used by company
Build good habits on the front apron at your fire station and good habits will come naturally when you are working on the fire ground!