RADIATOR CAP. Check for correct pressure rating.
OVERCOOLING.
Due to improper thermostat or shutter operation which results in engine sludging and in loss of power or fuel economy.
CLUTCH
The most important item in the drive line is the clutch, as it has a tremendous amount of work to do in transmitting
engine power.
Clutches require regular inspection and the recommended adjustment of the clutch assembly release bearing
clearance and pedal adjustment must be carefully maintained in order to obtain satisfactory service. Refer to
Manufacturer's Service Manual for correct adjustment.
SLIPPING. Experienced on grades with heavy loads and fast acceleration. To check with transmission in high gear, the
engine should stall with the brakes applied and the clutch engaged.
GRABBING. Indicated by rough engagement, which will jerk the vehicle; can be caused by improper adjustment, poor
driving practice, loose engine mounting bolts, or scored pressure plate.
DRAGGING. Indicated by gear clash during shifting because of incomplete disengagement. Correct by adjusting linkage
to obtain additional free pedal travel. May also be caused by warped pressure plate or driven disc.
TRANSMISSION
Typical symptoms of transmission troubles are noise, shifting difficulties, "jumping-out-of-gear" or lubricant leaks.
Heavy duty transmissions normally have a limited amount of gear noise; however, many noises attributed to transmissions
are caused by other
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