GENERAL MAINTENANCE INSTRUCTIONS
Section I. SPECIAL TOOLS AND EQUIPMENT
ment
No special tools and equipment are required
No specially designed tools and equipment are
by direct and general support maintenance
required by direct and general support main-
personnel for performing maintenance on the
tenance personnel for performing maintenance
lubricating and servicing unit.
on the lubricating and servicing unit.
Section Il. TROUBLESHOOTING
5-3 General
5-6. Excessive Compressor Oil Consumption
Probable Cause
Possible Remedy
This section provides information useful in
Incorrect oil ___________ Change oil and add correct
diagnosing and correcting unsatisfactory oper-
oil (LO 5-493&217-12).
ation or failure of the lubricating and serv-
Clogged air cleaner _____ Service air cleaner (para
icing unit or any of its components. Each
3-98) .
Worn piston rings _____ Replace piston rings. Be sure
trouble symptom stated is followed by a list of
rings are installed cor-
probable causes. The possible remedy recom-
rectly (para 7-2).
mended is described opposite the probable
cause. Refer to TM 6-2805-203-14 concerning
5-7. Transfer Pump Does not Operate
troublshooting the engine.
Probable Cause
Possible Rememdy
5-4. Compressor High or Low Pressure Sys-
Defective air valve and Repair or replace air valve
piston.
or piston (para 3-7 for
tem Overheats
pumps used on serial num-
Posssible Remedy
Probable Cause
bers 69-29737 thru 69-
Replace piston or hone.
Scored piston or
29942) (para 3-9 for
clinder wall ---------- (para 7-2).
pumps used on serial num-
Broken discharge valves Replace valves (para 7-2).
bers 84-29943 thru 84-
or springs.
30304 and 86-30305 thru
86-31248) .
5-5. Compressor
Knocks or Develops Exces-
Defective foot valve _____ Repair or replace foot valve.
sive Noise
on serial numbers 69-29737
Possible Remedy
Probable Cause
thru 69-29942) (para 3-9
Piston pins worn ------- Replace piston pins
and pis-
for pumps used on serial
tons (para 7-2).
numbers 84-29943 thru
Connecting rods loose --- Replace defective
84-30304 and 86-30305
thru 86-31248).
Tighten or replace
defective
connecting rods
(para 7-
2).
