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

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Presentation transcript:

Rotary Saws SECTION: Tools and Equipment ISSUED: REVISED:

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