TM 55-1930-209-14&P-7
3-4
Operating compressed air stations 1 thru 5 and 7
a.
Connect air hose to compressed air station quick disconnect coupling (Figure 3-6). Open air station air valve by
turning counterclockwise.
b.
Upon completion, close compressed air station air valve by turning clockwise.
c.
If hose is self-retracting, It may remain attached to quick disconnect coupling. If not self-retracting, remove hose
and stow in workshop storage area.
3-5
Using air impact wrench with air stations 1 thru 5 and 7
WARNINGS
Always wear safety glasses when operating an air impact wrench Use only Impact
wrench sockets. DO NOT use sockets from a hand wrench set.
3-5.1
Pre-operational procedures
a.
Make sure compressed air system has been purged of moisture within last four hours. If not, open draincock on
bottom of air filter 1 until all moisture has been drained from system.
b.
Select proper sockets for the assigned task. Loose, worn, or cracked sockets reduce wrench impact power and
may create a hazard for the operator. When possible, use deep sockets in place of long, springy extension bars
which absorb impact Always use simplest socket hookup possible, as multiple connections reduce available
impact.
c.
If more than one air hose Is necessary to reach the job location, all except the short leader hose to the tool should
be 1/2 Inch Inside diameter If couplers are used, they must not be directly connected to the wrench air inlet. This
makes the tool bulky and unwieldy and puts unnecessary strain on the tool inlet threads.
d.
Once a day, before using the wrench, pour about one tablespoon of oil into air inlet Use a turbine or spindle grade
oil with 100-150 Saybolt Universal Seconds viscosity. This oil goes in the air inlet where the hose is connected,
not in the oil hole on the side of the wrench body.
e.
Make sure air inlet screen is clean and installed in hose adapter.
3-5.2
Operating the air impact wrench
a.
Turn torque regulator on front of handle to low power position by rotating knurled knob fully clockwise as you look
down on the tool from above.
b.
Place tool on bolt or nut to be worked and squeeze trigger. Slowly rotate knurled knob counterclockwise until
desired power is being applied. If disassembling rusty or other hard to remove bolts/nuts, turn knob fully
counterclockwise. If nut/bolt does not start to move in three to five seconds, try other means of removing it.
c.
If wrench appears to be losing power, follow troubleshooting procedures on page 2 of Operating Instructions and
Parts Manual, Air Impact Wrench, in Appendix B.
3-8
