TM-9-2320-272-10
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; OPERATOR'S MANUAL
SEPTEMBER 2004
CHANGE 2
TM-9-2320-272-10 - Page 352 of 481
TM 9-2320-272-10
3-3
3-4. TROUBLESHOOTING SYMPTOM INDEX (Contd)
13.
Oil thrown from filler tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
14.
Slippage in all forward ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
15.
Transmission oil leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
TRANSFER CASE
16.
Transfer case lubricant leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
AIR AND BRAKE SYSTEMS
17.
Insufficient air pressure as indicated by low air pressure
warning buzzer or air pressure gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
18.
Service brakes do not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
19.
Parking brake does not hold vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
20.
Parking brake drags or overheats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
WHEELS, TIRES, AND HUBS
21.
Wheel wobbles or shimmies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
22.
Excessive or uneven tire wear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
23.
Vehicle wanders or pulls to one side on level surface or highway . . . . . . 3-10
STEERING
24.
Hard steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
25.
Oil leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
SPECIAL BODY EQUIPMENT
FRONT WINCH
26.
Winch drum does not turn or payout cable . . . . . . . . . . . . . . . . . . . . . . 3-11
27.
Winch does not wind . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
DUMP BODY HOIST ASSEMBLY
28.
Hoist does not lift dump body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
29.
Body raises to full dump but does not power down . . . . . . . . . . . . . . . . . . 3-12
30.
Hydraulic pump noisy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
31.
Tailgate does not open . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
HYDRAULIC CRANE
32.
Crane not operating or lacks power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
33.
Crane does not lift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
34.
Hydraulic pump noisy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
35.
Vehicle rolls while operating crane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
REAR WINCH
36.
Winch not operating or lacks power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
37.
Vehicle rolls while operating rear winch . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
EXPANSIBLE VANS
38.
Light shines through gaps at side panel of van body . . . . . . . . . . . . . . . . 3-14
MALFUNCTION
NO.
MALFUNCTION
TROUBLESHOOTING
PROCEDURE
PAGE
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