TM 9-2320-260-34-1
MECHANICAL SYSTEMS TROUBLESHOOTING
SYMPTOM INDEX (Contd)
TROUBLESHOOTING
MALFUNCTION
MALFUNCTION
PROCEDURE
NO.
PAGE
COOLING SYSTEM
Loss of coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine coolant temperature gage above 230F (110C) . . . . . . . . . . . . . .
CLUTCH
Vehicle will not remove with clutch engaged. . . . . . . . . . . . . . . . . . . . . . .
Burning odor evident with clutch engaged. . . . . . . . . . . . . . . . . . . . . . .
Clutch noisy during engagement and disengagement . . . . . . . . . . . . . . .
Vibration during clutch engagement. . . . . . . . . . . . . . . . . . . . . . . . . . .
TRANSMISSION
Engine stalls when clutch is engaged and transmission is in gear . . . . .
Vehicle will not move when clutch is engaged and transmission
is in gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Excessive noise during shifting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmission oil leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmission grinds and/or pops out of gear during shifting . . . . . . . . . .
TRANSFER CASE
Transfer case will not operate front differential . . . . . . . . . . . . . . . . . . .
Transfer case will not operate rear differentials . . . . . . . . . . . . . . . . . . .
Transfer case oil leakage........ . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transfer case noisy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transfer case grinds or pops out of gear during normal vehicle
operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DIFFERENTIAL
Differential noisy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Differential clunks during turns or initial takeoff. . . . . . . . . . . . . . . . . .
Differential vibrates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Differential leaks oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Abnormal tire wear (front axle) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Abnormal tire wear (rear axle) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STEERING GEAR
Excessive play in steenng . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vehicle shimmy (front) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering gear leaking oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil leaking from power steering pump . . . . . . . . . . . . . . . . . . . . . . . . .
Excessive power steering pump noise . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering wheel hard to tum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AIR COMPRESSOR
Low air pressure (no air leaks, governor properly adjusted and
operative) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air compressor passes excessive oil (excessive oil bled from air
reservoirs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air compressor does not unload (air governor adjusted and operative) . . .
Air compressor head leaking water. . . . . . . . . . . . . . . . . . . . . . . . . . . .
POWER TAKEOFF
(Transmission-driven) power takeoff inoperative . . . . . . . . . . . . . . . . . .
(Transfer case-driven) power takeoff inoperative . . . . . . . . . . . . . . . . . .
Power takeoff slips out of gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmission power takeoff leaks oil . . . . . . . . . . . . . . . . . . . . . . . . . .
Transfer power takeoff leak soil.... . . . . . . . . . . . . . . . . . . . . . . . . . .
2-3