Napa 6-1072 Instructions page 7

TROUBLESHOOTING
IMPACT WRENCHES
TOOL DOES NOT RUN OR RUNS SLOWLY,
AND/OR AIR FLOWS ONLY SLIGHTLY FROM
EXHAUST — This condition is probably
caused by insufficient air pressure,
contaminants blocking the airflow or
operation of motor parts, or a power
regulator which has vibrated to a closed
position.
YOU SHOULD: Check the air supply for
sufficient pressure. Check the air inlet
strainer for blockage. Pour a generous
amount of air tool oil into air inlet.
Operate tool in short bursts, in both
forward and reverse directions. Repeat if
necessary. If tool performance does not
improve, the tool should be serviced by an
authorized service center.
TOOL WILL NOT RUN, EXHAUST
AIR FLOWS FREELY. This condition is
probably caused by one or more motor
vanes stuck on accumulated sludge or
varnish; motor rusted.
YOU SHOULD: Pour a generous amount of
air tool oil into air inlet. Operate tool in
short bursts in both forward and reverse
directions. Lightly tap the motor housing
with a plastic mallet. Detach the air supply.
Try to free the motor by turning the drive
shaft manually, if possible. If the tool
remains jammed, it should be serviced by
an authorized service center.
SOCK­ETS WILL NOT STAY ON. This
condition is probably caused by a worn
socket retainer ring or a soft backup o-ring
YOU SHOULD: Wear safety goggles.
Detach the air supply. Using ex­ternal
retaining ring pliers, remove the old
retaining ring. While holding the sq­uare
drive with an appropriate wrench, use
a small screwdriver to pry old retainer
ring out of its groove. Always pry the
ring away from your body, because it can
be propelled outward at high velocity.
Replace the backup o-ring and retainer ring
with correct new parts (see breakdown).
Place the retaining ring on a table and
press the tool anvil into the ring with a
rocking motion. Snap the ring into the
groove by hand.
PREMATURE ANvIL WEAR. This is probably
cased by using chromed sockets, which are
not designed for use with impact tools, or
worn sockets
YOU SHOULD: Stop using chrome sockets.
Chrome sockets have a hard ex­terior
surface and a soft core, which leads to a
warped but very hard drive hole when used
with impact tools. Chrome sockets will
wear wrench anvils q­uickly and present a
danger of splitting or breakage which can
lead to injury or death.
TOOL SLOWLY LOSES POWER BUT RUNS AT
FULL SPEED WHEN NOT UNDER LOAD. This
condition is probably caused by worn clutch
PLEASE REVIEW ALL WARNING INSTRUCTIONS PRIOR TO OPERATION. SAVE ThIS mANUAL fOR fUTURE REfERENCE.
6-1072
parts, inadeq­uate lubrication, or worn
engaging cam.
YOU SHOULD: FOR OIL LUBED WRENCHES
FOR OIL LUBED WRENCHES: Check for
presence of clutch oil (where oil is specified
for the clutch) and remove oil fill plug. Tilt
to drain all of the oil from the clutch case.
Refill the case with NAPA air tool oil or
that recommended by the manufacturer
in the specified amount. Also check for
ex­cess clutch oil. Clutch cases only need
to be filled 50%, and overfilling can cause
drag on high speed clutch parts. A typical
1/2" Drive oil lubed wrench only req­uires
1/2 ounce of clutch oil. FOR GREASE LUBED
WRENCHES: Check for ex­cess grease by
rotating drive shaft by hand. It should
rotate freely, and ex­cess grease is usually
ex­pelled automatically.
TOOL WILL NOT SHUT OFF. This condition
is probably cause by a broken or maligned
throttle valve O-ring, or a bent or jammed
throttle valve stem.
YOU SHOULD: Remove the throttle
assembly and install a new o-ring.
Lubricate the assembly with air tool oil and
operate the trigger briskly. If operation
cannot be restored, the tool should be
serviced at an authorized service center.
AIR RATCHETS
MOTOR RUNS. SPINDLE DOESN'T TURN,
OR TURNS ERRATICALLY —This condition
is probably caused by worn teeth on the
ratchet or pawl, a broken or weak pawl
pressure spring, or weak drag springs
which fail to hold the spindle while the
pawl advances.
YOU SHOULD: Have replacement parts
installed by an authorized service center.
TOOL DOESN'T RUN, RATCHET HEAD
INDEXES CRISPLY BY HAND— This
condition is probably caused by the
accumulation of dirt or sludge in motor
parts.
YOU SHOULD: Pour a generous amount
of air tool oil into the air inlet. Operate
the throttle in short bursts. With the tool
engaged on a bolt, alternately tighten
and loosen the bolt by hand. If the tool
remains jammed, it should be serviced at
an authorized service center
AIR DRILLS
TOOL WILL NOT RUN, RUNS SLOWLY, AIR
FLOWS SLIGHTLY FROM EXHAUST, SPINDLE
TURNS FREELY — This condition is probably
caused by a blocked air passage or jammed
motor parts.
YOU SHOULD: Check the air inlet for
blockages. Pour a generous amount of
air tool oil into air inlet. Operate the
trigger in short bursts. Detach the air
supply. Turn the empty and closed drill
chuck by hand. Reconnect air supply. If
the tool's performance does not improve, it
7
should be serviced by an authorized service
center.
TOOL WILL NOT RUN. AIR FLOWS FREELY
FROM EXHAUST. SPINDLE TURNS FREELY.
This condition is probably caused by a
broken motor vane or jammed or broken
gears.
YOU SHOULD: Pour a generous amount
of air tool oil into air inlet. Operate the
trigger in short bursts. Detach the air
supply. Turn the empty and closed drill
chuck by hand. Reconnect air supply. If
the tool's performance does not improve, it
should be serviced by an authorized service
center.
TOOL SEIzED. SPINDLE WILL NOT
TURN — This condition is probably caused
by a broken rotor vane or jammed or
broken gears.
YOU SHOULD: Have the tool serviced by an
authorized service center.
TOOL WILL NOT SHUT OFF — The throttle
valve o-ring has probably come unseated.
YOU SHOULD: Replace the o-ring (see
breakdown) or have tool serviced by an
authorized service center.
AIR HAMMERS
TOOL WILL NOT RUN — This condition is
probably caused by a clogged cycling valve
or throttle valve.
YOU SHOULD: Check the air inlet for
blockages. Pour a generous amount of
air tool oil into air inlet. Operate the
trigger in short bursts with the chisel in
place and against a solid surface. Detach
the air supply. Tap the nose or barrel
lightly with a plastic mallet, reconnect the
air supply, and repeat above steps. If the
tool is still seized, insert a 6" piece of 1/8"
diameter rod in the nozzle and lightly tap
to loosen the piston in the rear direction.
Reconnect air supply and repeat above
steps.
CHISEL STUCK­ IN NOzzLE— This condition
is probably caused by a deformed shank.
YOU SHOULD: Have tool serviced by an
authorized service center.
NOTE: DISASSEMBLY OF THIS TOOL BY ANY
OTHER THAN AN AUTHORIZED SERVICE
CENTER WILL VOID THE WARRANTY ON
THIS TOOL.
Rev. 08/11/06