Table 2-1. Unit Level Preventive Maintenance Checks and Services HMMWV
ITEM
NO.
INTERVAL
ITEM TO BE
INSPECTED
PROCEDURES
PRIOR TO ROAD TEST
Ensure Operator/Crew has
performed PMCS listed in TM 9-
2320-280-10.
ROAD TEST
Maintenance personnel will be with
vehicle operator to assist in perform-
ing PMCS checks and verify pre-
service checks.
1
Semi-
Pre-Service
a. Notice if starter engages smoothly
a. Starter inoperative or
Annual
Checks
and turns the engine at normal
makes excessive grinding
cranking speed.
sound.
b. Listen for unusual noise at idle,
b. Engine knocks, rattles,
at operating speed, and under
or smokes excessively.
acceleration. Be alert for excessive
vibration and the smell of oil, fuel,
and exhaust.
c. Check for transmission response to
c. Transmission shifts
shifting and for smoothness of
improperly, does not shift,
operation in all gear ranges. Be alert
or makes excessive noises.
for unusual noises and difficulty in
shifting in any speed range.
d. Check for transfer response to
d. Lever inoperable or
shifting and for smoothness of
does not engage in all
operation in all gear ranges. Be
ranges with engine not
alert for unusual noises and difficulty
running.
in shifting in any gear range.
e. Test for response to accelerator
e. Pedal sticking or
feed. Observe for sticking pedal.
binding.
f. With vehicle speed approximately 5
f. Steering binds, grabs,
mph (8 kph) turn steering wheel to
wanders, or has excessive
left, then right, to detect hard steering,
freeplay.
steering backlash, or shimmy. Vehicle
should respond instantly. With vehicle
moving on straight, level terrain, lightly
hold steering wheel to check for pull
and wandering.
g. Apply brake pedal with steady force. g. Brakes chatter, pull
Vehicle should slow and stop without
to one side, or inoperative.
pulling to one side or jerking. Release
Brakes will not release.
brake pedal. The brakes should release
immediately and without difficulty.
NOTE
If desired range cannot be selected,
turn engine off, select range, and re-
start engine.
TM 9-2320-280-20-1
Change 1
2-5
NOT FULLY MISSION
CAPABLE IF:
