b. Operation. Remove fire extinguisher from
3-22. Fire Extinguisher (Carbon Dioxide
its location; break the seal, operate the control
Type)
valve, and direct the stream at the base of the
a. Description. The portable carbon dioxide
flame.
type fire extinguisher is suitable for electrical
c. Maintenance. For maintenance of the fire
extinguisher, refer to TM 5-687.
and flammable liquid fires.
SECTION V. TROUBLESHOOTING
Possible Remedy
Probable Cause
3-23. General
with correct oil LO 6-
4930-217-12.
This section provides information useful in
Clean compressor thoroughly.
Excessive dirt around
diagnosing and correcting unsatisfactory oper-
cooling fins.
ation or failure of the lubricating and servicing
Faulty valves __________ Replace valves (direct sup-
unit and its components. Each trouble symp-
port) .
tom stated is followed by a list of probable
causes of trouble. The possible remedy recom-
3-27. Compressor V-Belts Worn Excessively
mended is described opposite the probable
Possible Remedy
Probable Cause
cause. Any trouble beyond the scope of or-
Pulleys out of alinement_ Aline pulleys (para 3-53).
ganizational maintenance shall be reported to
V-belts too loose or too Adjust V-belts (para 3-10d).
direct support.
tight.
Oil or grease in V-belts-- Replace V-belts (para 3-41).
3-24. Compressor Overheats
3-28. Lubricant Delivery Faulty
Possible Remedy
Probable Cause
Possible Remedy
Probable Cause
Ventilation inadequate .. Provide adequate ventilation
Dirty or sticking con- Clean thoroughly with ap-
around unit.
proved solvent.
trol valve.
Cooling fins dirty ------- Clean compressor thoroughly
Leak in lines ---------- Tighten connections with
(part 7-2c).
couplings. Replace defec-
Low oil level ____ Add necessary oil to proper
tive hoses.
level LO 6-4930-217-12.
V-belts slipping _________ Adjust V-belts correctly
3-29. Lubricant Pump Fails to Operate
Dirty air cleaner _______ Service air cleaner (para
Properly
3-10b) .
Faulty valves ___________ Replace faulty valves (direct
Possible Remedy
Probable Cause
support) (para 7-4).
Inspect line for leaks in
Faulty connections in
hose, swivels, connectors,
grease line.
3-25. Compressor Noisy
control handle and pipe
line.
Probable Cause
Possible Remedy
Inadequate supply of air-Inspect air connections to
Low oil level ___ -__-__- Add correct oil to high level
pump.
(LO 5-4930-217-12).
Loose fly wheel or
Tighten pulleys securely.
engine pulley.
3-30. Insufficient Pressure or Volume with
Worn V-belts ___________ Replace worn V-belts (para
Pump Going
Possible Remedy
Probable Cause
Refill lubricant containers.
Exhausted lubricant
supply.
to Buildup Pressure
Push grease down around
Circulation of grease
pump intake priming tuba
slow.
Possible Remedy
Probable Cause
and use exhaust to warm
Air cleaner dirty and
Service air cleaner. Clean
grease.
thoroughly or replace
clogged.
Insufficient air pressure If necessary, set air regu-
later to higher pressure.
supplied to pump.
Adjust V-belts to proper ten-
V-belts improperly
Check for closed or inop-
sion (para 3-10d).
adjusted.
erative valves or obstruc-
Low oil level ------ ---- Check oil level in crankcase
and fill to high level mark
