Rotary Saws

frizzflowerUrban and Civil

Nov 29, 2013 (3 years and 10 months ago)

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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