Wel-Bilt 139272 User Manual
3/8in. BUTTERFLY IMPACT WRENCH
USER'S MANUAL
Item# 139272
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.
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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.
Distributed by
Northern Tool + Equipment Co., Inc.
2800 Southcross Drive West
Burnsville, MN 5337-0499
Made in China.
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For technical questions and replacement parts, please call 1-800-222-5381.
Thank you very much for choosing a Wel-Bilt , Product! For future reference, please
complete the owner's record below:
Model: _______________ Purchase Date: _______________
Save the receipt, warranty and these instructions. It is important that you read the entire
manual to become familiar with this product before using it.
This machine is designed for certain applications only. The distributor strongly
recommends that this machine is not modified and/or used for any application other than
that for which it was designed. If you have any questions relative to a particular
application, DO NOT use the machine until you have first contacted Northern Tool +
Equipment to determine if it can or should be performed on the product.
Before using this product, please read the following instructions carefully.
TECHNICAL SPECIFICATIONS
SAVE THIS MANUAL
You will need this manual for the safety warnings and precautions, assembly, operating,
inspection, maintenance and cleaning procedures, parts list and assembly diagram. Keep
this manual and invoice in a safe and dry place for future reference.
SAFETY WARNINGS
WARNING: When using tool, basic safety precautions should always be
followed to reduce the risk of personal injury and damage to equipment.
1.Keep work area clean. Cluttered areas invite injuries.
2.Observe work area conditions. Do not use machines or power tools in damp or wet
locations. Don't expose to rain. Keep work area well lit. Do not use electrically powered
tools in the presence of flammable gases or liquids.
3.Keep bystanders, pets and children away. Do not let unauthorized people handle
machines, tools, or extension cords.
4.Store idle equipment. When not in use, tools must be stored in a dry location to inhibit
rust. Always lock up tools and keep out of reach of children.
5.Use the right tool for the job. Do not attempt to force a small tool or attachment to do
the work of a larger industrial tool. There are certain applications for which this tool was
designed. It will do the job better and more safely at the rate for which it was intended. Do
not modify this tool and do not use this tool for a purpose for which it was not intended.
6.Dress properly while working. Do not wear loose clothing or jewelry as they can be
caught in moving parts. Protective, electrically non-conductive clothes and non-skid
footwear are recommended when working. Wear restrictive hair covering to contain long
hair.
7.Use eye, face and ear protection. Always wear ANSI-approved impact safety goggles.
Wear a full face shield if you are producing metal filings or wood chips. Wear an ANSIapproved dust mask or respirator when working around metal, wood, and chemical dusts
and mists. Wear ANSI-approved ear plugs.
8.Do not overreach. Keep proper footing and balance at all times. Do not reach over or
across running machines.
Item
Square Drive
Free Speed
Max. Torque
Air Consumption
Description
3/8in.
10,000 RPM
75 ft-lbs
6 CFM
1/4in.- 18NPT
3/8in.
90 PSI
Description
Air Inlet Diameter
Min. Hose Size
Max. air pressure
Item
TM
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can damage the tool. You may have to use penetrating oil, heat, or a mechanical
wrench to remove the fastener.
13.When you are finished using this tool, turn off the air compressor and disconnect the
air hose. Put the Air Impact Wrench away in its proper storage place.
MAINTENANCE
1.Your Air Impact Wrench should be kept clean and dry.
2.When not in use, store your tool in a suitable place where it will not be exposed to water,
corrosive materials, or undue banging around.
3.If you are not using an in-line oiler, you should inject a few drops of pneumatic tool oil
into the air inlet of the tool and the oiler screw port after every hour of continuous use.
4.If your tool loses power, or you notice air leaks, take it to a certified technician for
service.
5.All repairs to this tool should be performed by a qualified service technician.
PART LIST
Description
Part#
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Qty.
Housing
Oiler Screw
Throttle Lever
Anvil Bushing
Socket Retaining Ring
O-ring
Anvil
Hammer Pin
Hammer Cage
Hammer Dog
Cam
Oil Seal
Ball Bearing
Front End Plate
Rotor Blade
Rotor
Cylinder
Rear End Plate
Spring Pin
Ball Bearing
Back Cap Gasket
1
1
1
1
1
1
1
1
1
1
1
1 2
1
6
1
1
1
1
1
1
Description
Part#
23
22
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
Qty.
Back Cap
Spring
Valve Seat
O-ring
Spring
Plunger
O-ring
O-ring
Air Inlet Block
Spring
Steel Ball
Regulator
Throttle Pin
Washer
Retainer Ring
Spring Washer
Cap Screw
Rubber Nose Guard
Retainer Plate
Screw
1
2
2
2
2
2
2
1
1
1
1
1
2
1
1
4
4
1
1
2
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