Northern Industrial Tools Impact Driver NORTHERN INDUSTRIAL BLACK NICKEL AIR IMPACT WRENCH User Manual

3/8" BLACK NICKEL  
AIR IMPACT WRENCH  
OWNER’S MANUAL  
WARNING:  
Read carefully and understand all INSTRUCTIONS before  
operating. Failure to follow the safety rules and other basic  
safety precautions may result in serious personal injury.  
Item # 120209  
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Be alert of your surroundings. Using power tools in confined work areas may put you  
dangerously close to cutting tools and rotating parts.  
PERSONAL SAFETY  
Stay alert, watch what you are doing and use common sense when operating a power tool. Do  
not use a power tool while you are tired or under the influence of drugs, alcohol or medication. A  
moment of inattention while operating power tools may result in serious personal injury.  
Dress properly. Do not wear loose clothing, dangling objects, or jewelry. Keep your hair,  
clothing and gloves away from moving parts. Loose clothes, jewelry or long hair can be caught  
in moving parts. Air vents often cover moving parts and should be avoided.  
Use safety apparel and equipment. Use safety goggles or safety glasses with side shields  
which comply with current national standards, or when needed, a face shield. Use as dust mask  
in dusty work conditions. This applies to all persons in the work area. Also use non-skid safety  
shoes, hardhat, gloves, dust collection systems, and hearing protection when appropriate.  
Avoid accidental starting. Do not carry the power tool with your finger on the switch. Ensure  
the switch is in the off position before plugging tool into power outlet. In the event of a power  
failure, while a tool is being used, turn the switch off to prevent surprise starting when power is  
restored.  
Do not overreach. Keep proper footing and balance at all times.  
Remove adjusting keys or wrenches before connecting to the power supply or turning on the  
tool. A wrench or key that is left attached to a rotating part of the tool may result in personal  
injury.  
PNEUMATIC TOOL USE  
Do not force the tool. Tools do a better and safer job when used in the manner for which they  
are designed. Plan your work, and use the correct tool for the job.  
Never use a tool with a malfunctioning switch. Any power tool that cannot be controlled with the  
switch is dangerous and must be repaired by an authorized service representative before using.  
Check for misalignment or binding of moving parts, breakages of parts, damaged air hose (not  
included), and any other condition that may affect the tool’s operation. If damaged, have the tool  
serviced before using. Many accidents are caused by poorly maintained tools.  
Disconnect air supply from tool and place the switch in the locked or off position before  
making any adjustments, changing accessories, or storing power tools. Such preventive safety  
measures reduce the risk of starting the power tool accidentally.  
Secure work with clamps or a vise instead of your hand to hold work when practical. This  
safety precaution allows for proper tool operation using both hands.  
Store idle tools. When tools are not is use, store them in a dry, secure place out of the reach of  
children. Inspect tools for good working condition prior to storage and before re-use.  
Use only accessories that are recommended by the manufacturer for your model.  
Accessories that may be suitable for one tool may create a risk of injury when used on another  
tool.  
Keep guards in place and in working order.  
Never leave tool running unattended.  
Compressed air only. Only use clean, dry and regulated compressed air at no more than 90  
PSI to power this tool. Never use oxygen, carbon dioxide or any other bottled gas as a power  
source for this tool.  
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Use proper size and type air pressure line and fittings. The recommended air line for this tool  
is 3/8" delivering no more than 90 PSI. Recommended air inlet size is 1/4"- 18NPT.  
Use air hoses rated for safe operation of the tool. Air hoses rated for a maximum of 150 PSI or  
greater must be used with this tool.  
Make sure the hose is free of obstructions or snags. Entangled hoses can cause loss of  
balance or footing.  
ASSEMBLY  
Figure 1. Optimal pneumatic set-up.  
NOTE: For best performance, it is recommended to incorporate an inline filter, regulator, and oiler  
similar to the set-up seen in Figure 1. Everything needed for the perfect set-up can be found at  
Northern Tool + Equipment.  
1. You will need to attach a standard 1/4" air connector (not included) to the air inlet (29) of the  
tool. First wrap the threaded portion of the 1/4" air coupler with pipe thread tape. Then thread  
the air coupler into the air inlet (29), and tighten securely.  
2. Turn on the air compressor, set the air pressure regulator of the compressor to 90 PSI, and  
connect the 3/8" air compressor hose to the air connector on air impact wrench with a quick  
connect coupler (not included).  
WARNING: Do not connect pneumatic tool to compressed air in which the pressure  
exceeds 90 PSI. Damage to your tool and possible personal injury may result.  
NOTE: If you are not using an automatic oiler system, before operation, add a few drops of  
pneumatic tool oil to the airline connection. Add a few more drops after each hour of continual use.  
3. Check the air line and its connections for air leaks, and repair them before using this tool.  
4. Turn off the compressor and disconnect the air source hose in preparation to attach the  
sockets into the impact wrench.  
OPERATING INSTRUCTION  
WARNING: Always disconnect from the air source before examining or changing sockets.  
1. Select the appropriate size 3/8" drive socket, and attach the socket onto the wrench’s anvil.  
2. Turn the air regulator (32) in the direction indicated by the “H” arrow on the regulator to  
increase the power. Turn it toward the “L” arrow to decrease the power.  
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3. Set the forward/reverse lever to the left, so that the anvil turns clockwise (forward).  
4. Turn on the air compressor, confirm the compressor’s pressure regulator is set to 90 PSI, and  
connect the compressor hose to the air ratchet wrench at the air inlet (29).  
5. Place the socket (not included) over the nut you wish to tighten.  
6. Grip the impact wrench firmly with two hands and gently squeeze the trigger.  
7. When the nut is tightened, release the trigger. Turn off the air compressor and disconnect the  
hose.  
8. If necessary, check the recommended torque specification for the nut and use a manual  
torque wrench to achieve the proper setting.  
WARNING: If the impact wrench cannot tighten, or loosen, the nut to your satisfaction, do  
not raise the air pressure on the compressor over 90 PSI. Pressures above 90 PSI will strip the  
workpiece and damage the tool, potentially causing the tool to fail, causing serious injury. Use other  
appropriate methods and tools to tighten the nut.  
Loosening  
9. Set the forward/reverse ever to the right, so that the anvil turns counterclockwise (reverse).  
10. Place the socket (not included) over the nut you wish to loosen.  
11. Grip the impact wrench firmly with two hands and gently squeeze the trigger.  
12. When the nut is loosened, release the trigger. Turn off the air compressor and disconnect the  
hose.  
MAINTENANCE  
WARNING: Make sure this tool is disconnected from its air source and squeeze the trigger  
to release all compressed air in the tool before attempting any maintenance, cleaning, or  
inspection.  
Maintain your tools. It is recommended that the general condition of any tool be examined  
before each use. Keep your tools in good repair by adopting a program of conscientious repair  
and maintenance in accordance with the recommended procedures found in this manual. If any  
abnormal vibrations or noise occurs, turn the tool off immediately and have the problem  
corrected before further use. Have necessary repairs made by qualified service personnel.  
Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting  
edges are less likely to bind and are easier to control. Keep handles dry, clean, and free from oil  
and grease.  
Cleaning. Use a clean cloth to remove all dirt, oil, and grease from the tool after each use. If  
necessary, you may use a mild detergent. Do not use solvents, as damage to the tool may  
occur. Do not immerse the tool in any liquids.  
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EXPLODED DIAGRAM  
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PARTS LIST  
Part No.  
Description  
Motor  
Qty. Part No.  
Description  
Cap Washer  
Screw  
Qty.  
4
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
Oil Seal  
1
3
O-ring  
Valve Pin  
O-ring  
1
4
Socket Retainer  
Spindle Bush  
Anvil Shank  
Driver Cam  
Hammer Dog  
Hammer Cage  
Hammer Pin  
Front End Plate  
Oil Seal  
1
5
Steel Ball  
Spring  
1
6
1
7
Air Inlet  
Spring  
1
8
1
9
O-ring  
1
10  
11  
12  
13  
14  
Air Regulator  
Pin  
1
1
Trigger  
1
Ball Bearing  
Rotor  
Pin  
1
Forward/Reverse  
Lever  
1
15  
16  
17  
18  
19  
20  
21  
22  
Rotor Blade  
Cylinder  
6
1
1
1
1
1
1
4
37  
38  
39  
40  
41  
42  
43  
44  
O-ring  
2
1
1
1
1
1
1
1
Reverse Valve  
Screw  
Dower Pin  
Rotor End  
Hammer Cage  
Screw  
Pin  
Spring  
Deflector  
Housing Cap  
Washer  
Rubber Nose Guard  
Rubber Cover  
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WARNING  
Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains  
chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.  
Some examples of these chemicals are:  
• lead from lead-based paints,  
• crystalline silica from bricks and cement and other masonry products, and  
• arsenic and chromium from chemically-treated lumber.  
Your risk from these exposures varies, depending on how often you do this type of work. To reduce your  
exposure to these chemicals: work in a well ventilated area, and work with approved safety equipment,  
such as those dust masks that are specially designed to filter out microscopic particles.  
Northern Tool + Equipment Co.  
2800 Southcross Drive West  
P.O. Box 1499 Burnsville, MN 55337-0499  
Made in CHINA  
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