5
SERVICE INSTRUCTIONS
DISASSEMBLY
To disassemble the tool, place the flats of the barrel in a
vise with the handle, No. 833157, facing upward. Using a
pair of spreader pliers, spread the exhaust deflector, No.
834674, open and slip it down on the barrel far enough to
allow the handle locking ring to be disengaged from the
handle. Unscrew the handle from the barrel and remove
the valve block button, No. 832172, valve, No. 832195, and
valve block, No. 832506. Remove the barrel from the vise
and invert it, allowing the plunger to fall out. To disas-
semble the throttle valve, unscrew throttle valve cap, No.
833155, and remove the throttle valve spring, No. 834852,
and throttle valve, No. 834854. Throttle valve pin, No.
834853, will drop out of throttle valve pin bushing, No.
832210.
Remove handle bushing, No. 833471, and wash the inlet
screen in a solvent. Blow air through the screen in reverse
of normal air flow to remove any foreign matter. If the
screen is torn or damaged, it should be replaced.
REASSEMBLY
The tool is reassembled in the reverse order of disassem-
bly. Wash all parts thoroughly in a solvent before reassem-
bly. Prepare the threads on the barrel and in the handle
with a high grade thread lubricant before assembling.
Make sure the threads are clean before lubricating. The
handle, No. 833157, should be torqued to 300 ft. lbs. After
reassembly, place teaspoon of 10W machine oil in the
handle bushing before attaching the air hose. This will
insure immediate lubrication of all parts as soon as the air
is applied. After the air hose is connected to the tool and
the air supply turned on, there should be a slight amount
of free play in the throttle lever, No. 834855, lack of which
will allow the tool to run without being throttled. If no free
play is evident, the flat end of the throttle valve pin should
be ground off until there is a small amount of free play in
the throttle lever.
Eye protection must be worn when disassembling tool or when air line is turned on. A
self-relieving valve in close proximity to the repair station to bleed off air is recom-
mended.
TAB
LOCK SPRING
INSTALL RETAINER ON BARREL.
ALIGN SLOT IN RETAINER WITH
GROOVE ON BARREL.
BARREL
RETAINER
INSERT SPRING INTO SLOT
IN RETAINER UNTIL ONLY
TAB ON SPRING IS EXPOSED.
CHISEL
INSERT CHISEL INTO RETAINER
UNTIL LATCH SPRING RISES.
ROTATE CHISEL 1/4 TURN (90°)
IN EITHER DIRECTION.
RETAINER AND CHISEL
ARE NOW LOCKED INTO
POSITION.
OPTIONAL CLECO TYPE RETAINER
GROOVE
SLOT
INSTALL RETAINER ONTO BARREL
WITH SLOT IN RETAINER AND
GROOVE ON BARREL IN ALIGNMENT.
INSERT SPRING INTO SLOT IN
RETAINER UNTIL ONLY TAB
ON SPRING IS EXPOSED.
TAB
LOCK SPRING
BARREL
CHISEL
PULL RELEASE COLLAR BACK
AND INSERT CHISEL.
RETAINER
RELEASE COLLAR SHOULD RETURN TO
ORIGINAL LOCATION WHEN COLLAR OF
CHISEL IS BEHIND BALLS IN RETAINER.
OPTIONAL QUICK CHANGE RETAINER FOR ROUND COLLARED CHISEL ONLY
RELEASE COLLAR
GROOVE
SLOT
WARNING
!
