2-17. Operation of Dump Trucks.
a. General. Dump trucks covered in this manual may be used as regular cargo carriers, or as a
regular, rocker type, or spreader type dump truck. The payload capacity for cross-country
operation is 10,000 pounds. The payload capacity for highway operations is 20,000 pounds.
When using a dump truck as a personnel carrier, the dump body control lever in the
cab must be secured in locked position. Failure to observe this can result in
Stay clear of dump body and cab protector at all times during loading and
unloading operations. The dump body can raise accidentally when overloaded
or when a heavy load is dumped into the dump body. This can result in serious
When using a dump truck equipped as a personnel carrier for dumping operations,
side racks, seats. bows and covers must be removed from the truck and stored.
Always shift the transmission into NEUTRAL when the engine is running and the
truck is stationary. Allowing the engine to run with the transmission engaged and
the transfer in NEUTRAL may cause transfer bearing failure.
Always place the control lever in NEUTRAL position with the safety lock engaged
when the hoist is not being operated. Never leave dump body control lever engaged
in any position while the truck is being driven to and from a job location.
The truck must be at a complete halt, with the clutch disengaged, to shift the dump
body control lever out of NEUTRAL and engage the transmission power takeoff
and hoist pump. Once these units have been engaged, the dump body control lever
may be moved through its entire operating range until the lever is again placed in
the NEUTRAL position.
b. Rigging the Tailgate for Rocker Type Operation.
(1) Unfasten harness hooks (6) securing tailgate wings (1) to sides of dump body. Swing
tailgate wings to rear.
(2) Remove retaining pins (4) securing
tailgate upper hinge pins (3) in upper hinge
pin brackets (2).
Lower tailgate (5) so that the
upper hinge pins (3) engage grooves (7) in
tailgate wings (1).