WARNING
Some dust createdby power sanding, sawing, grinding, drilling, and other construction
activities contains chemicalsknown to theState of Californiato cause cancer, birth
defects or otherreproductive harm. Someexamples of thesechemicals are:
lead from lead-basedpaints,
crystalline silica frombricks and cementand other masonryproducts, and
arsenic and chromiumfrom chemically treatedlumber.
Your risk from theseexposures varies, dependingon how oftenyou do thistype of work.
Toreduce your exposureto these chemicals:work in awell-ventilated area, andwork with
approved safety equipment, such as thosedust masks thatare specially designedto filter
out microscopic particles.
1/2in. AIR IMPACT WRENCH
USER'S MANUAL
Distributed by
Northern Tool + Equipment Co., Inc.
2800 Southcross Drive West
Burnsville, MN 5337-0499
Made in China.
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DIAGRAM & PART LIST
Description
Description
Air Regulator
O-ring
Description
Pin Cylinder
Cylinder
Description
Part#
Part#
12
Part#
23
Part#
Housing
1
2
34
Rear Cover
Washer
Valve Sleeve
Reverse Valve
Trigger
13
24
35
36
Spring
3
14
25
Rotor
Screw
Protecting Rubber
4
15
Oil Seat
Screw
26
Rotor Blade
37
38
5
Pin
16
27
Exhaust Deflector
Brass Silencer
Screw
Front End Plate
Ball Bearing
Bushing
Anvil bushing
6
17
28
38-1
39
7
Valve Stem
Steel Ball
Spring
18
Anvil
29
Rear End Plate
Pin
Hammer Cage
8
19
30
40
Screw
9
20
Hammer Pin
Hammer Dog
31
41
Anvil Collar
O Ring
Spring
Pin
10
11
21
32
42
Hose Adapter
Screen
22
Drive Cam
33
Rear Gasket
43
Rubber
Screw
44
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4.Remove adjustingkeys or wrenchesbefore turning onthe tool. A wrenchor a keythat is
left attached toa rotating partof the toolmay result inpersonal injury.
5.Do notoverreach. Keep properfooting and balanceat all times. Proper footing and
balance enables bettercontrol of thetool in unexpectedsituations.
6.Use safetyequipment. Alwayswear ANSI-approvedsafety glasses underneatha full
face shield, andhearing protection.
ASSEMBLY AND OPERATING INSTRUCTIONS
To attach a quick connector
WARNINGPrior to performingany assembly and/oradjustment procedures,
make sure theair supply hose(not included) isdisconnected from theimpact
wrench.
1.Prior touse, the impactwrench requires theattachment of aquick-connector into itsair
inlet. To do so, wrap approximately 3in. of pipe threadsealer tape (notincluded) around
the male threadsof a quick-connector. Then, firmly tighten thequick-connector into the
air inlet.
USE AND CARE
1.Use clampsor other practicalways to secureand support theworkpiece to astable
platform. Holding thework by handis unstable andmay lead toloss of control. Only work
on a workpiecethat is properlysecured.
2.Do notforce or modifythe tool. Usethe correct toolfor your application. The correct tool
will do thejob better andsafer at therate for whichit is designed.
3.Do notuse the powertool if thetrigger does notturn it onor off. Any toolthat cannot be
controlled with theTrigger isdangerous and mustbe replaced.
4.Disconnect theair hose fromthe tool beforemaking any adjustments, changing
accessories, or storingthe tool. Suchpreventive safety measuresreduce the riskof
starting the toolaccidentally.
5.Store idletools out ofreach of childrenand other untrainedpersons. Tools are
dangerous in thehands of untrainedusers.
6.Maintain toolswith care. Donot use adamaged tool. Tagdamaged tools "Donot use"
until repaired.
7.Check formisalignment or bindingof moving parts, breakages of parts, damaged air
hose (not included), and any othercondition that mayaffect the tool's operation. If
damaged, have thetool serviced beforeusing. Many accidentsare caused bypoorly
maintained tools.
8.Use onlyaccessories that arerecommended by themanufacturer for yourmodel.
Accessories that maybe suitable forone tool maybecome hazardous whenused on
another tool.
Fig. 1
SPEED SELECTOR
Four speeds canbe selected. Tochange speed pushin and rotatethe selector dialat the
base of thehandle. Do notchange speeds whilsttool is inmotion.
LOOSENING
1.Attach thecorrect size socketto the anvil.
2.Set thecompressor's pressure regulatorto 90 PSI. Do not setthe compressor's outlet
regulator above 90PSI.
3.Connect thetool to theair compressor's hose. If leakage isdetected, disconnect theair
hose and fixit correct beforeuse.
4.Place thesocket over thenut to loosen.
5.Grip thetool firmly. Press theREVERSE valve infrom the areaabove the triggerso that
the REVERSE valveprotrudes out theback of thehousing. Press thetrigger to startthe
tool.
SERVICE
1.Tool service mustbe performed onlyby qualified repairpersonnel. Service or
maintenance performed byunqualified personnel couldresult in arisk of injury.
2.When servicinga tool, useonly identical replacementparts. Follow instructionsin the
Inspection, Maintenance andCleaning section of thismanual. Use ofunauthorized
parts or failureto follow maintenanceinstructions may createa risk ofinjury.
(Caution: Make surethe nut orbolt can withstandthe impact wrench'sworking
torque.)
NOTE:
SPECIFIC SAFETY RULES
1.To avoid accidentalinjury, always wearANSI-approved safety glasses, a full faceshield,
and hearing protectionwhen operating thetool.
2.Use clean, dry, regulated, compressed airat 90 PSI. Do not exceedthe recommended
90 PSI. Neveruse oxygen, carbondioxide, combustible gases, or any otherbottled gas
as a powersource for thistool.
ØIf the toolcannot loosen thenut, DO NOTraise the outletpressure of theair
compressor.
ØWhen the nutis moved, stopthe tool byreleasing the triggerand remove thetool
from the nut. Remove the nutfrom the socketif needed.
3.When connectingto the airsupply: Prior toeach use, ifan automatic oileris not used,
add two dropsof air tooloil (not included)into the airinlet fitting ofthe tool.
4.Always disconnectthe tool fromits compressed airsupply source, andsqueeze the
trigger to releaseall compressed airin the toolbefore performing anymaintenance or
service.
5.The warnings, precautions, and instructionsdiscussed in thismanual cannot coverall
possible conditions andsituations that mayoccur. The operator mustunderstand that
common sense andcaution are factorswhich cannot bebuilt into thisproduct, but must
be supplied bythe operator.
Tightening
The working torqueof the impactwrench is 230ft.-lbs. Make surethat the nutor bolt you
are using thetool to tightencan withstand therated torque.
1.Tighten the nut asfar as youcan by hand.
2.Place thesocket on thenut. Press theREVERSE valve forwardso it protrudesout the
front of theHousing. Press thetrigger to startthe tool.
NOTE:
ØIf the toolstalls while tightening, DO NOT raise the outletpressure of theair compressor
above 90 PSI.
ØWhen the nuthas been tightened, remove the tooland socket. Donot over-tighten.
ØIf available, checkthe recommended torquespecifications for thenut. You should usea
torque wrench totorque the nutafter using theimpact wrench.
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