Section IV. OPERATOR'S MAINTENANCE
37. General
a. Removal.
The instructions in this section are published for
the information and guidance of the operator to
(1) Remove the oil filler plug (para 40).
maintain the air compressor.
(2) Stop the engine (para 17).
38. Intake Air Muffler
(3) Remove the drain plug from the oil drain
elbow. Drain the oil from the crankcase
Refer to figure 9 for intake air muffler servicing.
and remove the elbow as illustrated in fig-
39. Fuel Strainer
ure 18.
Refer to paragraph 59 and TM 52805-208-14.
b. Cleaning and Inspection.
40. Oil Filler Plug
(1) Clean all parts in an approved cleaning
a. Removal.
solvent and dry thoroughly.
(1) Stop the engine (para 17).
(2) Inspect the plug and elbow for dents and
(2) Remove the oil filler plug from the com-
damaged threads. Replace a defective part.
pressor crankcase as illustrated in figure 18.
c. Installation.
b. Cleaning and Inspection.
(1) Install the elbow in the compressor crank-
(1) Clean the plug with an approved cleaning
case and install the drain plug as illus-
solvent.
trated in figure 18. Fill the compressor
(2) Inspect for cracks or breaks.
crankcase in accordance with the lubrica-
(3) Replace if defective.
tion order.
c. Installation. Install the oil filler plug as illus-
(2) Install the oil filler plug (para 40).
trated in figure 18.
Section V. TROUBLESHOOTING
Possible remedy
Probable
cause
42. General
Air leakage in unit . . . . . . . . . Tighten connection.
This section provides useful information in diag-
Load too great for com- Reduce load requirement of
compressor.
pressor capacity.
nosing and correcting unsatisfactory operation or
failure of the air compressor and its components.
44. Compressor Overheats
Each trouble symptom stated is followed by a list
Possible remedy
Probable
cause
of probable causes of trouble. The possible remedy
recommended is described opposite the probable
v-belts slipping . . . . . . . . . . . . Adjust v-belts (para 67).
cause. Any trouble beyond the scope of organiza-
Intake and exhaust valves Clean or replace valves (para
tional maintenance shall be reported to direct sup-
faulty,
port maintenance.
Intake air cleaner dirty.. ., Service intake air cleaner (para
43. Compressor Pumps Too Slowly
Oil level . . . . . . . . . . . . . . . . . Inspect oil level in crankcase
and fill in accordance with lu-
Possible remedy
Probable
cause
brication order.
Intake air cleaner clogged. . Service intake air cleaner (para
33) .
45. Compressor Fails to Pump to Pressure
V-belts improperly adjusted. Adjust V-belts (para 67).
Possible remedy
Probable
cause
Oil level low . . . . . . . . . . . . . . Check oil level in crankcase and
Air leakage in unit. . . . . . . . Eliminate by tightening con-
fill in accordance with the lu-
nections.
brication order.
Unloader valve leaks.. . . . . Adjust or replace unloader
Intake and exhaust valves Clean or replace valves (para
valve.
faulty.
