2-4. BODY EQUIPMENT CONTROLS AND INDICATORS (Contd)
TAILGATE LATCHES unlock when tailgate control lever (3) is pulled forward. Latches lock tailgate when control
lever (3) is pushed back.
DUMP BODY SUPPORT BRACES hold dump body in up position for safety during maintenance or cleaning of
dump body underside.
BRACKETS hold dump body support braces (10) when not in use.
ELECTRICAL CABLE AND CONNECTOR provides electrical power to semitrailer.
EMERGENCY AIRBRAKE HOSE AND COUPLING connect to the emergency airbrake coupling on the
semitrailer. Semitrailer emergency brake system is activated when the service airbrakes fail.
SERVICE AIRBRAKE HOSE AND COUPLING connect to the service air coupling on the semitrailer.
AIRBRAKE HOSE COUPLING SHUTOFF VALVES are placed in the down (open) position to release compressed
air to the semitrailer.
LOCKING PLUNGER HANDLE is pulled forward, then out to unlock fifth wheel coupling jaws (17).
FIFTH WHEEL COUPLING JAWS lock the semit railer kingpin into the tractor fifth wheel.