Northern Industrial Tools Impact Driver 1961202 User Manual

Air To o ls  
ITEM# 1961202  
1/ 2" Variable SpeedImpact Wrench  
USER' S MANUAL  
Read carefully and understandRULES FOR SAFEOPERATION and instructions  
before operating. Failure to follow the safety rules and other basic safety  
precautions may result in serious personal injury.  
Made in China  
 
10.Use compressed air only. Clean, dry,regulated compressed air at 90 PSI. Never use  
oxygen, carbon dioxide, combustible gases, or any other bottled gas as a power source  
for this tool.  
11.Always disconnect air supplywhen this toolis not beingused.  
NOTE: The warnings, cautions, and instructions discussed in this instruction manual  
cannot cover all possible conditions and situations that may occur. It must be  
understood bythe operator that common sense and caution are factors that cannot  
be built into this product but must be supplied by the operator.  
NOTE: READ ALL INSTRUCTIONS BEFOREUSING THIS PRODUCT  
OPERATION  
Set Up  
Fig. 1  
!
WARNING!  
This impact wrench supplies powerful torque and it designed to be operated with two  
hands. Failure to operate the Impact wrench with two hands may result in serious  
injury.  
1.You will need to prepare a 1/ 4"air connector (not included) to connect to the air  
inlet on the tool. First, wrap the 1/ 4" airconnector with pipe thread seal tape (not  
included) before threadingit into the inlet. Connect the 3/ 8" ID airsource hose (not  
included) to a quick-disconnect coupler (not included) and then to the tool.  
2.Set the air pressure on your compressor to 90 PSI. Do not exceed the recommended  
air pressure of90 PSI.  
3.Check the air connection forleaks.  
4.Disconnect from the air hose until next instructed to reconnect.  
Note: Turn offyour air compressorand disconnect the air hose when you are changing  
sockets. After you attach the socket (not included), attach the air hose and turn the air  
compressor on.  
i.Select the appropriate size 1/ 2"socket foryour needs.  
ii.Push and snap the socket onto the anvil.  
iii.Tightening  
The max. workingtorque ofthe impact wrench is 300ft.-lbs. It can be adjusted from  
115 ft.-lbs. to300ft.-lbs. Make sure that the nut or bolt you are using the tool to tighten  
can withstand the rated torque.  
2 of 4  
 
1.Tighten the nut as faras you can by hand.  
2.Place the socket on the nut. Press the REVERSE BUTTON(#30) to FORWARD 1, 2, 3.  
You can get the different torque on different steps. (See Fig. 2)  
1.Press the trigger to start the tool.  
115 ft.-lbs.  
190 ft.-lbs.  
300 ft.-lbs.  
NOTE: When changing the step, stop pressing the trigger(#9), then adjust the reverse  
button (#30).  
NOTE:  
1. If the tool stalls while tightening, DO NOT raise the outlet pressure ofthe air  
compressor above 90 PSI.  
2. When the nut has been tightened, remove the tool and socket. Do not overtighten.  
3. If available, check the recommended torque specifications for the nut. You should  
use a torque wrench to torque the nut after using the impact wrench.  
Loosening  
1.Attach the correct size socket to the anvil.  
2.Set the compressor's pressure regulatorto 90 PSI.Do not set the compressor's  
outlet regulator above 90 PSI.  
3.Connect the tool to the air compressor's hose. If a leak is detected, disconnect the  
air hose and fix it before use.  
4.Place the socket overthe nut to loosen.  
5.Grip the tool firmly. Press the REVERSEBUTTON (#30)to REVERSE step. Press the  
trigger to start the tool.  
(Caution: Make sure thenut or bolt canwithstand the impact wrench' sworking torque.)  
NOTE:  
If the toolcannot loosen the nut, DO NOT raise the outlet pressure ofthe air  
compressor.  
When the nut is moved, stop the tool by releasingthe trigger and remove the tool from  
the nut. Remove the nut from the socket if needed.  
MAINTENANCE  
!
WARNING  
Always disconnect the air supplybefore attemptingany maintenance.  
After disconnecting the air supply, squeeze the triggerto make sure no airremains in  
the unit.  
1.After each use, wipe down the impact wrench with a lint-free cloth. Do not use  
solvents or harsh detergents to clean the tool.  
2.Make sure the air inlet is clean ofdirt, grease, or debis.  
3 of 4  
 
Diagram  
Description  
Housing  
Qty.  
1
Description  
Bearing  
Qty.  
2
Part No.  
Part No.  
22  
23  
24  
1
2
O-ring  
1
Rear Gasket  
Rev. Valve  
1
Cap Screw  
3
8
1
O-ring  
4
Hammer Case  
Cap Screw  
1
25  
26  
27  
1
Rear Cover Ring  
5
1
1
Trigger Retainer  
6
1
Back Cover  
Locking Pin  
Spring  
1
7
Rev. Valve Sleeve  
Trigger Shaft  
Trigger  
1
28  
29  
30  
31  
1
8
1
1
9
1
Reverse Button  
Screw  
1
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
Valve Seat  
Throttle Valve  
Spring Valve  
1
1
Spring Washer  
1
32  
33  
34  
35  
36  
37  
8
1
Hammer Pin  
Hammer  
2
Exhaust Deflector  
Inlet Bushing  
1
2
1
Hammer Frame  
Standard Anvil  
O-ring  
1
Front end plate  
1
1
Rotor  
1
1
Socket Retainer Ring  
Anvil Bushing  
Handle Grip  
Rotor Vane  
Spring Pin  
Cylinder  
6
38  
39  
40  
41  
1
1
1
1
1
Spring Pin  
Spring Washer  
1
1
Rear End Plate  
1
4 of 4  
 

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