2-13. Stopping the Truck and Shutting Down the Engine.
a. LIFT YOUR FOOT OFF ACCELERATOR PEDAL and let reduction in engine rpm
and automatic downshifting of transmission help to slow truck.
b. APPLY SERVICE BRAKES to bring truck to a normal, complete stop.
c. When truck is completely stopped, SHIFT TRANSMISSION RANGE SELECTOR
TO NEUTRAL AND APPLY PARKING BRAKES.
d. Idle engine for at least 3 minutes as indicated in CAUTION.
e. TURN OFF ENGINE RUN SWITCH.
a. Stop truck.
b. Pull PARKING BRAKE control knob.
c. If truck is parked on normal surfaces, parking brakes will provide sufficient holding
2-15. Fifth Wheel.
The M915A1 truck tractor is equipped with a cab controlled sliding fifth wheel for use
with trailers having a 2-inch diameter kingpin. The fifth wheel is 36 inches in diameter
and can oscillate, or pitch, 15 degrees fore and aft. Rated vertical load capacity is 40,000
Ibs. Drawbar pull capacity is 150,000 Ibs. There are two manual kingpin lock releases
on the left side of the fifth wheel as shown. To uncouple the trailer kingpin from the
fifth wheel, first pull the Primary Lock Release Pull Ring, then pull the Secondary Lock