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, contami-
nants 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 suf-
ficient 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 prob-
ably 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 sup-
ply. 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 condi-
tion 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 retain-
ing 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 out-
ward 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 sock-
ets. 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.
6-1080
parts, inadequate lubrication, or worn
engaging cam.
you Should: FOR OIL LUBED WRENCHES
FOR OIL LUBED WRENCHES: Check for pres-
ence 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 assem-
bly 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 condi-
tion is probably caused by the accumula-
tion 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 block-
ages. Pour a generous amount of
air tool oil into air inlet. Operate the trig-
ger 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
6
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 trig-
ger 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 bro-
ken 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 block-
ages. Pour a generous amount of
air tool oil into air inlet. Operate the trig-
ger 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. 06/20/06