TM 9-2320-272-24-1
Table 2-1. Unit Preventive Maintenance Checks and Services (Contd).
NOT FULLY
MISSION
PROCEDURE
CAPABLE IF:
Transmis-
31
Semi-
d. For M939A2 series vehicles, inspect transmission
sion and
annual
temperature sending unit for security and signs of leaks,
transfer
and wiring for frays, splits, breaks, and missing insulation.
case
Tighten temperature sending unit if loose or leaking.
(Contd)
Replace if necessary (para. 3-97). Repair or replace wiring
that is missing, or shows signs of frayed, split, or missing
insulation. Tighten loose connections (para. 3-97).
e. Inspect transmission PTO unit (winch models and
dump trucks only).
1 .Inspect for security of mounting and leaks. Notify
DS maintenance if mounting is loose or leakage is present.
2. Inspect oil line and fittings between transmission
and PTO unit for loose connections, cracks, frays,
wear, and damage that could cause leaks. Notify DS
maintenance if mounting is loose or leakage is present.
3. Inspect hydraulic pump for security of mounting,
leaks, and signs of damage that could cause leaks. Notify
DS maintenance if mounting is loose or leakage is present.
4. Inspect hydraulic lines and fittings for loose
connections, cracks, frays, wear, and damage that could
cause leaks. Notify DS maintenance if mounting is loose
or leakage is present.
f. Remove transfer case fill plug and check oil level in
transfer case every 3,000 mi. (4,800 km) or 3 months,
whichever comes first. Fill if necessary. Level should be
within 1/2 in. (12.7 mm) from fill hole when oil is cold, or
to the fill hole when hot.
g. Inspect transfer case drainplug and fill plug for
tightness and signs of leakage.
h. Inspect transfer case for leaks. Notify DS maintenance
if leaks are detected.
i. Inspect shift linkage for cracks, bends, and wear.
j. Inspect transfer case PTO unit (M936/A1/A2 only).
1. Inspect for security of mounting and leaks.
2. Inspect oil and air lines and fittings on transfer
case and PTO for loose connections, cracks, frays, wear,
and damage that could cause leaks. Tighten loose connec-
tions. Replace any oil or air line, hose, or fitting that is
cracked, frayed, worn, or damaged and could cause leaks.
3. Inspect hydraulic pump for security of mounting,
leaks, and signs of damage that could cause leaks. Tighten
mounting of hydraulic pump (para. 3-393).
4. Inspect hydraulic lines and fittings for loose
connections, cracks, frays, wear, and damage that could
cause leaks. Tighten loose connections. Replace any oil
line, hose, or fitting that is cracked, frayed, worn, or
damaged and could cause leaks (para. 3-387).
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