Northern Industrial 1961202 User manual

AirTools
Made in China
Read carefully and understandRULES FOR SAFEOPERATION and instructions
before operating. Failureto follow thesafety rules andother basic safety
precautions may resultin serious personal injury.
ITEM#1961202
1/2"VariableSpeedImpactWrench
USER'SMANUAL

For technicalquestions and replacementparts, pleasecall 1-800-222-5381.
Thankyouvery much for choosinga NORTHERNTOOL+ EQUIPMENT CO., Product!
For future reference, pleasecomplete theowner'srecordbelow:
Model: _______________ Purchase Date:_______________
Savethe receipt,warranty andthese instructions. It isimportant that you read the
entireinstruction sheet to become familiarwith this productbeforeyoubegin using it.
This productis designedforcertain applications only.Northern Tool+ Equipment
stronglyrecommends that thisproduct isnot modifiedand/orusedforany
application other than thatforwhich it was designed. If you have any questionsrelative
to aparticular application, DONOTuse the product until you havefirst contacted
Northern Tool+ Equipmentto determine ifit canor should be performedon theproduct.
Beforeusingthis product,please read the followinginstructions carefully.
TechnicalSpecifications
SAVETHISMANUAL
Youwill need this manual for thesafetywarnings andprecautions, assembly, operating,
inspection, maintenance and cleaning procedures, parts listand assemblydiagram.
Keepthis manualand invoicein asafeand dry placeforfuturereference.
WARNINGSANDSAFETYRULES
1.Wear proper clothing.Alwaysuse ANSI-approvedsafetyimpactgoggles when
assembling orusing this tool. Wear long sleevedshirts, long pants and hard-toedshoes.
Take offanyloosefitting jewelryand keep long hair coveredto preventbeing caught in
movingparts.
2.Wear proper breathingprotection.Remember that a"dust mask" is not abreathing
respirator.Use arespirator that usescharcoal filters for thebestprotection.
3.Keep work area clean and well lighted.A dimand/or cluttered work area invites
personalinjury.
4.Keep children and pets awayfromworkareas.Childrencan be adistraction and
shouldbe supervised by an adult when near theworkarea. Neverallowchildrento
playwiththis productevenif itis turned off.
5.Store idletoolsproperly. Keep this tool outof thereachof children.
6.Donot use theToolif under theinfluence ofalcoholor prescriptiondrugs.Doing so
maycausedamageto the tool, orpersonalinjury.Do not usethis or anytoolif you are
tired.Use commonsenseat alltimes.
7.Check fordamagedparts. Beforeusingthis tool, carefullycheck foranyparts that
maybe missingor damagedand any other conditionsthat may affect the operation
of thistool.Replaceor repair damaged and worn parts immediatelyusingonly
qualifiedrepair facility.
8.Alwaysuse the proper tools.This tool was designedfora specific task. Donot alter
this tool, or useit for apurposeforwhich it was notintended.
9.Becareful when connecting/disconnectingair supply.It isrecommendedto use quick
disconnects (not included)ratherthan screw-onair connections.
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Item Description Description Item
Drive Size
Free Speed
Max. Torque
Air Consumption
Air Inlet Diameter
Max. Air Pressure
1/2"
7000 RPM
300 ft-lbs
5.6 CFM
1/4"- 18NPT
90 PSI

Fig. 1
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10.Usecompressed air only. Clean, dry,regulated compressedair at 90PSI. Neveruse
oxygen, carbon dioxide, combustible gases,or any other bottled gasas a power source
for this tool.
11.Alwaysdisconnect air supplywhen this toolis not beingused.
NOTE: Thewarnings, cautions, andinstructions discussed inthis instruction manual
cannot coverall possible conditionsand situations thatmay occur. It mustbe
understood bythe operator thatcommon sense andcaution are factors that cannot
be built intothis product butmust be suppliedby the operator.
NOTE:READALLINSTRUCTIONSBEFOREUSINGTHISPRODUCT
OPERATION
SetUp
WARNING!
This impact wrenchsupplies powerful torque and itdesigned to beoperated with two
hands. Failure to operate theImpact wrench withtwo hands may result inserious
injury.
1.Youwill need toprepare a 1/4"air connector (notincluded) to connectto the air
inlet on thetool. First, wrapthe 1/4" airconnector with pipethread seal tape(not
included) before threadingit into theinlet. Connect the3/8" ID airsource hose (not
included) to aquick-disconnect coupler (not included) andthen to thetool.
2.Set theair pressure onyour compressor to 90 PSI.Do not exceed the recommended
air pressure of90 PSI.
3.Check theair connection forleaks.
4.Disconnect fromthe air hoseuntil next instructed to reconnect.
Note: Turn offyour air compressorand disconnect theair hose whenyou are changing
sockets. After you attach thesocket (notincluded), attach theair hose andturn the air
compressor on.
i.Select the appropriate size 1/2"socket foryour needs.
ii.Push and snapthe socketonto the anvil.
iii.Tightening
The max. workingtorque ofthe impact wrenchis 300ft.-lbs. It canbe adjusted from
115 ft.-lbs. to300ft.-lbs. Make surethat the nutor bolt youare using thetool totighten
can withstand therated torque.
!

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1.Tighten thenut as faras you canby hand.
2.Place thesocket onthe nut. Pressthe REVERSE BUTTON(#30) to FORWARD 1,2, 3.
You canget the differenttorque ondifferent steps. (SeeFig. 2)
1.Press thetrigger to startthe tool.
NOTE:When changing thestep, stoppressing the trigger(#9), then adjustthe reverse
button (#30).
NOTE:
1. If thetool stalls whiletightening, DO NOT raise theoutlet pressure ofthe air
compressor above90 PSI.
2. When thenut has beentightened, removethe tool andsocket. Do not overtighten.
3. If available, check therecommended torquespecifications for thenut. Youshould
use a torque wrench to torquethe nut afterusing the impactwrench.
Loosening
1.Attach thecorrect size socketto the anvil.
2.Set thecompressor's pressure regulatorto 90 PSI.Do not setthe compressor's
outlet regulator above 90 PSI.
3.Connect thetool tothe air compressor'shose. If aleak is detected, disconnect the
air hose andfix it beforeuse.
4.Place thesocket overthe nut toloosen.
5.Grip thetool firmly.Press the REVERSEBUTTON (#30)to REVERSE step. Press the
trigger to startthe tool.
(Caution:Makesurethenutorboltcanwithstandtheimpactwrench'sworkingtorque.)
NOTE:
If the toolcannot loosen thenut, DO NOT raise theoutlet pressure ofthe air
compressor.
When the nutis moved,stop the tool by releasingthe trigger andremove thetool from
the nut. Remove the nutfrom the socket if needed.
MAINTENANCE
WARNING
Always disconnectthe air supplybefore attemptingany maintenance.
After disconnecting theair supply,squeeze the triggerto makesure no airremains in
the unit.
1.After eachuse, wipe downthe impact wrenchwith a lint-freecloth. Do notuse
solvents or harshdetergents toclean the tool.
2.Make surethe air inletis clean ofdirt, grease, or debis.
115 ft.-lbs. 190 ft.-lbs. 300 ft.-lbs.
!

Diagram
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24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
Part No. Description Qty.
23
Description
Part No. Qty.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Housing
O-ring
Cap Screw
Hammer Case
Cap Screw
Trigger Retainer
Rev. Valve Sleeve
Trigger Shaft
Trigger
Valve Seat
Throttle Valve
Spring Valve
Exhaust Deflector
Inlet Bushing
Front end plate
Rotor
Rotor Vane
Spring Pin
Cylinder
Spring Pin
Rear End Plate
1
1
8
1
1
1
1
1
1
1
1
1
1
1
1
1
6
1
1
1
1
Bearing
Rear Gasket
Rev. Valve
O-ring
Rear Cover Ring
Back Cover
Locking Pin
Spring
Reverse Button
Screw
Spring Washer
Hammer Pin
Hammer
Hammer Frame
Standard Anvil
O-ring
Socket Retainer Ring
Anvil Bushing
Handle Grip
Spring Washer
2
1
1
1
1
1
1
1
1
1
8
2
2
1
1
1
1
1
1
1