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Rotary Saws

Rotary Saws. SECTION: Tools and Equipment ISSUED: 02-2011 REVISED: 02-2012. Objectives. To provide an understanding of the following Specifications Use Maintenance Safety. Engine 2 stroke Carbureted Electric ignition Air cooled Fuel mixture- 50:1 premix

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Rotary Saws

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  1. Rotary Saws SECTION: Tools and Equipment ISSUED: 02-2011 REVISED: 02-2012

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

  3. 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” Specifications

  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. 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 BladesBlack Star Diamond Blade

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

  7. BladesComposite 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. BladesDiamond Abrasive Masonry • Cuts masonry and reinforced concrete • Wet or dry • Cuts in one direction

  9. BladesComposite 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. TS 510 Controls • Stop • Choke • Trigger lock • Throttle • Throttle interlock • Decompression valve

  11. 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

  12. TS 400 Controls • Throttle lock/off • Throttle interlock • Throttle • Decompression valve • Choke/half choke

  13. 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

  14. TS 360 Controls • Stop • Trigger lock • Choke • Pull to engage • Throttle • Throttle interlock

  15. 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

  16. K-12 FDHusqvarna K970 • Compression release • Choke • (activates throttle lock) • Stop • Priming pump • Throttle and interlock

  17. K-12 FDHusqvarna 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

  18. 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

  19. 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

  20. Start Up ProcedureTips 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

  21. 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

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

  23. 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

  24. 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

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

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

  27. Replace blade Ensure proper arbor spacer is used for blade Replace thrust washer and line up flanges Tighten bolt and remove arbor wrench Changing Blade

  28. 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

  29. 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

  30. 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

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