TM-9-2320-361-20
2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)
TECHNICAL MANUAL; UNIT MAINTENANCE
OCTOBER 1991
TM-9-2320-361-20 - Page 138 of 1207
TM 9-2320-361-20
TROUBLESHOOTING SYMPTOM INDEX
MALFUNCTION
TROUBLESHOOTING
NO.
MALFUNCTION PROCEDURE
PAGE
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
PARKING BRAKE
Parking brake will not hold vehicle . . . . . . . . . . . . . . . . . . . . . . . . . .
2-54
Parking brake drags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-54
SERVICE BRAKES
Brake pedal low, soft, or goes to floorboard (weak or no braking) . . . . .
2-56
Excessive pedal pressure required to stop vehicle (brake pedal stops
two inches or more above floorboard); no apparent air system failure . .
2-58
Vehicle pulls to right or left when applying brakes . . . . . . . . . . . . . . .
2-60
Brakes drag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-61
Brakes squeal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-62
COMPRESSED AIR
Excessive pedal pressure required to stop vehicle when towing a trailer
M275A2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-62
No air pressure or compressed air reads below 60 psi (low air pressure
warning buzzer sounding indicating air pressure not building up to
normal operating range as indicated by gage) . . . . . . . . . . . . . . . . . .
2-66
Air pressure does not build up to normal operating pressure (above 85 psi)
according to gage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-68
Air pressure exceeds maximum (gage reads over 120 psi) and safety
valve opens to release pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-68
Low, or no reading on air pressure gage and warning buzzer shuts off .
2-70
Warning buzzer fails to sound on low pressure (below 60 psi). . . . . . . .
2-70
AIR-OPERATED ACCESSORIES
Windshield wipers inoperative or operate slowly (gage at normal
operating pressure) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-71
Front wheel drive does not engage (front wheel drive lock-in switch
engaged) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-72
Air horn does not work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-73
2-53
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