DUMP BODY - Continued
A manually-operated transport lock is mounted on the left side of the dump body, near the front; it locks and
unlocks the dump body from the truck frame. For normal operation, it is unlocked.
The transport lock is placed in the locked position when the dump truck is being lifted and transported. This
actuates a transport lock switch, which disengages the power take off (PTO), thereby preventing the PTO from
operating to power the hydraulic cylinder.
A cargo cover helps prevent the load from spilling out. It is extended or retracted using the control handle or the
removable crank handle.
The M917A1 and M917A2 differ from the M917A1 with MCS and M917A2 with MCS in tailgate configuration:
Figure 1. Tailgate Components: M917A1 and M917A2.
The M917A1 and M917A2 use a nine-panel conventional tailgate that opens from the bottom to dump the load.
Adjustment chains, mounted to the tailgate, control the tailgate opening for spreading operations.
A tailgate release control valve lever, located on the instrument panel inside the cab, controls the tailgate release
air cylinder mounted under the dump body to unlock and lock the tailgate at the bottom.