TM 5-4220-211-12&P
4-3.
ENGINE MAINTENANCE SCHEDULE. Like the compressor, the maintenance schedule for the engine is based
upon either frequency of use or on operating time. Table 4-2 lists the maintenance items, the frequency of maintenance
and the appropriate instructional reference paragraph.
Table 4-2. ENGINE MAINTENANCE SCHEDULE
Frequency of
Maintenance
Maintenance Item
Ref. Par.
Daily/Every 8 hours
Air Cleaner-Check Oil Level
4-5a
Daily/Every 8 hours
Crankcase-Check Oil Level
2-lg
First 20 hours/
Crankcase-Change Oil
4-5c
Every 100 hours/6 mos.
First 20 hours/
Crankcase-Clean Oil Screen
4-5d
Every 250 hours/12 mos.
First 20 hours/
Valves-Adjust
4-5e
Every 250 hours/12 mos.
Every 100 hours/6 mos.
Cooling System-Check & Clean
4-5g
Every 250 hours/12 mos.
Fuel Filter--Replace
4-5f
Every 100 hours/6 mos.
Air Cleaner-Change Oil
4-5b
Every 80 hours
Air Cleaner-Change Oil During operation in extreme heat,
dusty, or sandy areas
4-5b
Section III
MAINTENANCE INSTRUCTIONS
4-4.
a.
Inlet Air Filter. Service the air filter (1, Fig. D-10) as follows:
(1)
Unscrew cover and remove element (5, Fig. D-10).
(2)
Clean element with brush or low pressure air blowing from the inside out.
(3) Turn element 90 degrees clockwise when reinstalling. Check O-rings for wear. Check that spring is
seated properly. Screw cover onto air cleaner housing.
NOTE
Replace dirty element after it has been rotated three times (80 hours).
b.
Fill Hose and Manifold. Inspect the fill hose and manifold (not included) (Fig. 1-2) as follows:
(1) Inspect hose fittings for damaged threads, worn sealing surface and other flaws.
Replace hose
assembly if damaged.
(2) Inspect fill valve, gauge, vent valve and filler adapter for damage, missing parts or wear. Replace if
defective.
(3)
Inspect hose for kinks, splits or damage. Replace if defective.
c. Interstage and Final Separator Drains. Drain condensate from the interstage and final separators (10, Fig.
D-11) and (15, Fig. D-12) as follows:
(1)
Slowly open drain valves (10, Fig. D-11) & (15, Fig. D-12) until condensate begins to flow.
(2)
Observe condensate flow from each drain valve.
Change 3 4-2