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 108 of 1015
TM 9-2320-272-24-1
Table 2-1. Unit Preventive Maintenance Checks and Services (Contd).
ITEM TO
ITEM
INTERVAL
CHECK/
PROCEDURE
NO.
SERVICE
NOT FULLY
MISSION
CAPABLE IF:
21
Semi-
Steering
NOTE
annual
system
(Contd)
Lubricate grease fittings every 3,000 mi. (4,800 km)
or 3 months, whichever occurs first. When practical,
lubrication services will be made to coincide with
the semiannual preventive maintenance service. For
this purpose, a 10 percent tolerance (variation) in
specified lubrication point mileage is permissible.
b.
Lubricate at steering knuckle grease fittings (1), tie
rod assembly grease fittings (4), steering shaft grease
fittings (7) and (8), drag link grease fittings (2), and power
steering assist cylinder grease fittings (6).
LUBRICANTS
GAA
Grease, automotive and
artillery (MID-G-10924)
EXPECTED TEMPERATURES
+40°F TO -15°F
+40°F TO -65°F
(+4°C TO -26°C)
(+4°C TO -54°C)
All temperatures
ABOVE 15°F
(ABOVE -9°C)
NOTE
An assistant is required to perform the following
step.
c.
Inspect steering stops for presence and security.
If any stop is missing or has broken welds, notify DS
maintenance.
d.
With engine shut off, turn steering wheel slowly
d. Movement
right and left.
between cross and
1.
Inspect steering gear U-joints while steering wheel
cap is present.
is rotated.
2.
Check for free play between steering knuckles
and tie rod ends, power assist cylinder, and drag link and
pitman arm to drag link. If free play is present, tighten
four steering knuckle nuts (5) and drag link-to-pitman arm
nut (3) 140-180 lb-ft (190-244 N·m). Tighten to minimum
torque and continue to tighten as needed to align slot in
nut and cotter pin hole. Do not tighten over 275 lb-ft
(373 N·m).
3.
Repeat step 2. If free play is still present, notify
DS maintenance.
e.
Inspect power steering assist assembly.
1.
Remove stone shield (para. 3-231).
2.
Inspect power steering assist cylinder for
condition and security of mounting (para. 3-233).
2-20
Back to Top
