TM-9-2320-279-20-1
M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)
TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS; ORGANIZATIONAL MAINTENANCE, VOLUME 1 OF 3
TM-9-2320-279-20-1 - Page 57 of 985
TM 9-2320-279-20-1
Table 2-1.
Unit Level Preventive Maintenance Checks and Services
Item
Interval
Item To Be
No.
Inspected
Procedure
Not Mission
Capable If:
6
Semi-
Cooling
a. Check coolant condition. Test cool-
a. Coolant
condi-
Annual
System
ant to see if draining is necessary (TB
tion/testing shows
750-651).
draining is re-
Continued
quired.
b. Check all hoses for looseness, splits,
b. Class III leakage
wear, and cracks that would cause
evident. Hoses are
leaks.
loose or have splits
or cracks.
c. Inspect hose clamps for wear and
serviceability.
c. Hose clamps are
worn or unservice-
able.
7
Semi-
PTO
Inspect PTO pump for leaks, cracks, or
Cracks, damage, or
Annual
Pump
damage.
Class III leaks.
8
Semi-
Air Intake
WARNING
Annual System
If NBC exposure is suspected, all air fil-
ter media should be handled by person-
nel wearing protective equipment.
Consult your unit NBC Officer or NBC
NCO for appropriate handling or dis-
posal instructions.
a. Inspect air cleaner, hoses, and tub-
ing for proper installation, cracks,
breaks, or loose connections that could
let unfiltered air get into air intake sys-
tem.
a. Cracks, breaks,
or loose connections
evident.
b. Remove air filters (paragraph 4-3)
b. Air filters has
and service. After servicing, reinstall
holes or damaged
(paragraph 4-3).
seal.
9
Semi-
Exhaust
WARNING
Annual
System
The exhaust pipe and muffler can be-
come very hot during vehicle operation.
Be careful not to touch these parts with
bare hands, or allow body to come in
contact with pipe or muffler. Exhaust
system parts can become hot enough to
cause serious bums.
a. Inspect exhaust manifold, exhaust
pipes, muffler, and tailpipe for corro-
sion and carbon deposits which may in-
dicate leaks.
a. Evidence of cor-
rosion or carbon de-
posits evident.
Change 2
2-9
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