8
JAT-120,121,122,123 Impact Wrenches
Maintenance
Lubrication
The impact wrench should be lubricated
daily
(or
before each use) with air tool oil through the air
inlet. During continual operation, it should be re-
oiled every 1 to 2 hours. This can be done with an
in-line oiler, or manually. If done manually,
proceed as follows:
1.
Disconnect air hose from tool.
2.
Place 4 or 5 drops of air tool oil into air inlet.
NOTE: Air tool oil not provided; it is available
at most major hardware and tool stores. SAE
#10 oil or sewing machine oil may be used
as a substitute. Do not use detergent oil.
3.
Re-connect air. Run impact wrench at low
throttle without load for a few seconds to
distribute the oil throughout tool.
4. When finished operating impact wrench,
disconnect air hose. Wipe off housing with a
dry cloth. Place 4 or 5 drops of air tool oil into
air inlet; re-connect air and run tool for a few
seconds to distribute the oil. Disconnect air.
The impact wrench has been pre-greased from
the manufacturer, and it is generally unnecessary
to grease the tool during its normal life. However,
should the tool require future servicing, a grease
fitting is supplied beneath the hammer case. Use
Lithium Complex Moly 2 grease or equivalent.
Storage
Avoid storing the impact wrench in very humid
locations which promotes rusting of internal
mechanisms. Always oil the tool and disconnect
air hose before storage.
Air system requirements
1. Use proper air hose size (refer to tool
specifications). The hose should be just long
enough to serve the working area. Excessive
hose length will cause pressure drop.
2.
Make sure air compressor supplies clean,
dry air at correct CFM for the impact wrench.
3.
Set air pressure to 90 psi.
Excess air pressure
and/or unclean air will shorten the tool’s
life and may create a hazardous situation.
4.
Drain water from air compressor tank daily,
as well as any condensation from air lines.
Water in the air line may enter the tool and
cause damage.
5.
Change filters on the air system on a regular
basis.
6. Air-line pressure may be increased
accordingly to compensate for extra-long air
hoses (usually over 25 feet). Inside diameter
of hose should be minimum 3/8-inch.
General Air Tool
Information
If the air tool is not performing according to
specifications, the following are among the most
common causes. (See also “Troubleshooting”
section.)
•
Contaminated air such as a dirty air system
or water in the system.
•
Using wrong size tool for the job.
•
Poor maintenance practices, such as using
excessive air pressure or air volume.
•
Improper or no lubrication.
Rule of Thumb
If it takes more than 8 seconds to tighten or loosen
a bolt or nut with an air impact wrench at
maximum setting, the air wrench is too small or
the air compressor CFM is not powerful enough
for the job. Continued use in either capacity will
cause damage to the tool.
Tool Pressure
JET Air Tools operate on 70-to-100 psi (pounds
per square inch) air pressure measured at the tool
when the tool is operating. Set tool to 90 psi
unless indicated otherwise. Pressure in excess of
100 psi will shorten the life of the tool.
