parts of the drive line such as axle, propeller shaft, universal joint or clutch. These should be checked before removing the
transmission to locate the trouble. The basic transmission troubles are indicated as follows:
NOISY TRANSMISSIONS. May be due to worn or damaged parts, improper or insufficient lubricant, misalignment of
transmission with clutch housing or torsion vibration transmitted by the clutch.
Refer to Manufacturer's Service Manual for detailed information.
SHIFT DIFFICULTIES. May be due to improper adjustment of the clutch linkage, incorrect driving practice, binding of the
shift rails or the gear lubricant being too heavy.
"JUMPING-OUT-OF-GEAR". May be caused by weak or broken shifter rail poppet springs, misalignment of bell housing
or transmission parts, bent or loose shifter forks or broken snap rings, or improperly adjusted linkage, permitting gears or
shaft to move lengthwise.
PROPELLER SHAFT
Carriers are equipped with one or more propeller shafts, depending upon the wheel base connecting the transmission
to the rear axle. Universal joints permit movement of the rear axle in relation to the power plant assembly and the splined
end takes care of the changes in length due to spring deflection.
Excessive noise and vibration indicates trouble of the drive line due to the universal joint flanges not being parallel,
worn universal joint bearings, loose center bearing, unbalanced propeller shaft or lack of lubricant.
AIR BRAKES
The air brake system consists of three main elements; the compressor with governor and reservoirs supply the air
pressure; the brake application valve controls the braking pressures; and the brake
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