Powershift Transmission and Aux Box
Double-clutching, three or four times just to make it look hard, is OUT on your new CCE.-LHC Dump Truck. Like the
Owner-Operator Professional Truckers, you've got a powershift main and three range aux box to get power or speed. The
S speed main provides you flexibility for load hauling In each of the three, aux box ranges. These are (1) Underdrive for
slugging It out off-road up to 10 mph; (2) Directdrive for heavy hauling up to 32 mph; and (3) Overdrive for light hauling
and coming home empty up to 42 mph.
The main transmission is the powershift type, like other earthmoving equipment, however, you also have automatic
range shifting, similar to your car. Even though the torque converter has a big, engine-cooled, heat exchanger on top of
the engine, prolonged stalling or heavy operation of the main transmission, out f torque converter look-up, can cause over
hedting and the transmission high-temperature light to come on. If you do overheat, shift to neutral and cool things down
by speeding up the engine. Never shut her off and let her cook, except when low fluid pressure also occurs. To keep
from overheating, look at your tach and keep those engine RPM's up by shifting the aux box to match your terrain
conditions. This main transmission is a trucker's type, not a passenger car type, so keep checking the dip stick for fluid,
like it says in the manual. For towing other vehicles, use the torque converter and first gear in the main and directdrive in
the aux box. This will avoid blowing the "safety fuse" - your U-joints. Your high engine torque times converter stall, times
first gear, times
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