TM 9-2320-273-20
Item
No.
7
Table 3-1. Unit Level Preventive Maintenance Checks And Services M915-M920
Interval
Semi-
Annual
Item To Be
Inspected
Engine
Crank-
case
Procedure
NOTE
COLD TEMPERATURE OPERATION
For operation of equipment in expected
continuous temperatures below 0° F
(-18° C), remove lubricants prescribed in
the key for temperature above 0° F (-18°
C). Re-lubricate with lubricant specified
in the key for temperatures 0° F to -50° F
(-18° C to -46° C).
NOTE
Engine Oil Filter. After installing new filter
element, fill crankcase, operate engine 5
minutes, and check housing for leaks.
Shut down engine, check crankcase oil
level and bring to full mark.
NOTE
If AOAP laboratory is not available, drain
and refill engine crankcase with OE/HDO
every 3,000 miles (4,800 km) or semi-an-
nually, whichever comes first.
a. Drain and refill crankcase with OE/
HDO.
b. Replace engine oil filter.
c. Check and clean crankcase breather
and attaching hoses.
d. Check all oil lines and hoses for
cracks and wear that could cause leaks.
e. Check oil filter housing and oil pan
drain plug for looseness. Make sure all
oil pan bolts are tight.
f. Check rocker housing covers for evi-
dence of leaks.
Not Mission
Capable If:
“Do not operate” re-
ceived from AOAP
laboratory.
b. Oil filter has
Class Ill leak.
d. Cracks, frays,
leaks, and wear are
evident.
e. Drain plugs and
oil pan bolts are
loose.
f. Class Ill leaks evi-
dent.
3-10 Change 4
