TM-9-2320-272-23-2
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 2 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-2 - Page 373 of 1417
Table
1.
Field Preventive Maintenance Checks and Services - Continued.
ITEM
NO.
INTERVAL
ITEM TO BE
CHECKED OR
SERVICED
PROCEDURE
EQUIPMENT
NOT READY/
AVAILABLE IF:
parts if condition could impair operation of brakes
(Volume 3, WP
0438). Tighten loose air lines and
fittings.
j.
Inspect M939A2 series vehicles CTIS air lines
and fittings for loose connections, cracks, splits, or
damage that could cause air leaks. Tighten loose air
lines and fittings.
k.
Lubricate spring trunnion bearings every
3,000
mi (4,800 km) or 3 months, whichever occurs
first (Volume 5, WP
0820).
l.
Visually inspect spring leaves, retaining clips,
and center screws for cracks, breaks, and security of
mounting. Replace spring leaves, retaining clips, or
center screws if cracked or broken (Volume 3,
WP
0539). Secure mounting if loose.
m.
Inspect torque rods.
(1)
Visually inspect rubber for cracks, splits, or out-
of-round condition. Replace torque rods if rubber is
cracked or out-of-round (Volume 3, WP
0544).
(2)
Check torque rod nuts for tightness. For
inspection purposes, torque rod nuts should be
350
to
700
lb-ft
(475 to 949 N·m). If loose, tighten
torque rod nuts 350 to 400 lb-ft (475 to 542 N·m).
Continue to tighten until cotter pins can be installed.
n.
Inspect both front and rear wear pads for wear.
Replace if wear pads are rubbing the spring bracket
(Volume 3, WP
0541).
o.
Tighten nuts on spring U-bolts 300 to 400 lb-ft
(407
to
542 N·m).
CAUTION
Clean breathers and axle around breathers
before servicing to prevent damage to axle
from contamination.
p.
Remove, clean, and lubricate axle breathers
every 1,000 mi (1,600 km) or monthly, whichever occurs
first (Volume 5, WP
0820).
q.
Remove fill plug (Figure 9, Item 3) on forward-
rear and rear-rear differential (Figure 9, Item 1) and
check oil level in differential (Figure 9, Item 1) every
3,000 mi (4,800 km) or 3
months, whichever occurs
first (Volume 5, WP
0820). If necessary, fill differential
(Figure
9,
Item
1). Level in differential
(Figure
9,
Item
1) should be within 1/2 in. (12.7 mm)
TM 9-2320-272-23-2
0207
0207-38
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