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 354 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:
21
Semiannual
Steering System
a.
Inspect steering knuckles, steering gear, tie rod
assembly, steering arms, drag link, pitman arm, lower
steering gear shaft, and power steering cylinder if
broken, cracked, worn, or signs of unserviceable
condition are present.
(1)
Treat for corrosion or steering knuckles, tie rod
assembly, steering arms, drag link, pitman arm, or
steering gear shaft.
(2)
Replace tie rod shaft assembly, drag link,
pitman arm, lower steering gear shaft, or power steering
cylinder if broken, cracked, worn, or signs of an
unserviceable condition are present.
(3)
If steering knuckles, steering arms, or steering
gear are broken, cracked, worn, or have other signs of
an unserviceable condition, Repair or replace as
required (Volume 3, WP
0412).
NOTE
Lubricate grease fittings every 3,000 mi
(4,800 km) or 3 months, whichever occurs
first (Volume 5, WP
0820). When practical,
lubrication services will be made to coincide
with the semiannual preventive maintenance
service. For this purpose, a 10% tolerance
(variation) in specified lubrication point mile-
age is permissible.
b.
Lubricate at steering knuckle grease fittings
(Figure 4, Item 1), tie rod assembly grease fittings
(Figure 4, Item 4), steering shaft grease fittings
(Figure
4, Items 7 and 8), drag link grease fittings
(Figure
4,
Item
2), and power steering assist cylinder
grease fittings (Figure 4, Item 6).
NOTE
An assistant is required to perform the fol-
lowing step.
c.
Inspect steering stops for presence and security.
If any stop is missing or has broken welds, notify
supervisor.
d.
With engine shut off, turn steering wheel slowly
right and left.
Movement between cross
and cap is present.
(1)
Inspect steering gear U-joints while steering
wheel is rotated.
(2)
Check for free play between steering knuckles
and tie rod ends, power assist cylinder, and drag link and
TM 9-2320-272-23-2
0207
0207-19
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