TM-9-2320-272-24-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4
JUNE 1998
TM-9-2320-272-24-1 - Page 132 of 1015
TM 9-2320-272-24-1
Table 2-1. Unit Preventive Maintenance Checks and Services (Contd).
NOT FULLY
PROCEDURE
MISSION
CAPABLE IF:
FINAL ROAD TEST
After all services and inspections have been completed,
perform a short road test to ensure all corrections have
been implemented. Correct any defects or malfunctions
that may occur during this test.
ANNUAL INSPECTION
NOTE
• Lubricate vehicle in accordance with
LO 9-2320-272-12.
• Perform all semiannual checks listed in this table.
45
Annual
Front end
a. Check front end alignment with toe-in gauge. Correct
toe-in is 1/16-3/16 in. (1.588-4.763 mm). When toe-in is
correct, tighten crossshaft screws and nuts 35-55 lb-ft
(47-75 N•m) (para. 3-152).
b.
Inspect axle housings and differentials for cracks.
c.
Inspect shock absorbers and mounting brackets for
looseness, wear, cracks, serviceability, and leaks. Replace
leaking shock absorbers if more than a class I leak is
detected (para. 3-166).
d.
Check each tire using tire depth gauge. Tread depth
should be at least 1/8 in. (3 mm) or as indicated on tire
depth gauge.
46
Annual
Engine
a.
Inspect front cab mounting brackets for security, wear,
compart-
cracks, splits, broken welds, loose bushings, and missing
ment and
screws. Replace front cab mounting brackets if worn,
cab
cracked, split, or welds are broken. Replace loose
insulators and missing screws (para. 3-304).
b.
Inspect rear cab mounting brackets for security, wear,
cracks, splits, broken welds, loose bushings, and missing
screws. Replace front cab mounting brackets if worn,
cracked, split, or welds are broken. Replace loose
bushings and missing screws (para. 3-305).
c.
Tighten front cab mounting screws.
d.
Check the following items on M939A2 vehicles:
1. Inspect front and rear engine mounting brackets for
security, wear, cracks, splits, broken welds, loose bushings,
and missing bolts (para. 2-15).
2-44
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