Feb 1977
Rev A. July 1977
Heated Dump Body
1. Field users of the CCE IHC Dump Trucks have reported that cargo fires have occurred when transporting combustible
material in the dump trucks for long distances. Users should be aware that the CCE -IHC Dump Truck is intended
primarily for use as a dump truck in the same role as Its commercial counterpart. The truck will haul earth, sand, gravel,
asphalt paving mix, and rock and do a good job. While it can transport snow, leaves, refuse, and barracks bags, these
are not the normal payloads of an on-off road dump! The truck's suspension is too stiff for transporting light payloads
economically. In prolonged use, the truck will beat itself apart through vibration and cause high maintenance costs.
2. The CCE dump also has peculiar characteristics with combustible payloads In the bed. If the engine exhaust diverter
valve is routing the exhaust through the dump bed (instead of out the vertical stack pipe), combustible payloads (such as
leaves and barracks bags) can build up enough heat at the surface of the bed, to catch the payload on fire near the end of
prolonged travel. Even if you position the diverter valve to route the exhaust gases through the stack pipe, watch it! The
diverter valve is spring loaded. The spring is relatively weak and the payload will not deflect the springs and tires when
traveling over rough pavement. The result is the vibrations and shocks may overcome the diverter valve spring and
alternately send the exhaust gases through dump body and the exhaust stack at random.
3. For both combustible payloads, construction material payloads, and aggregates, you should decide where you want
the diverter valve positioned and then secure the valve in a positive manner in that position to insure that it stays put.
Heavy wire and screen door or other types of springs with hooks or alligator clamps are suggested to keep the valve from
flapping. Remember, the load of laundry you burn up may include your own.
4. The diverter flipper and valve body are made of 1/4-inch plate and designed to work freely with large clearances.
Close tolerances to achieve a perfect fit are not practical in this engine-exhaust-gas environment. Close tolerances would
result in binding and an inoperative diverter valve, caused by heat warpage of the parts and carbon buildup. Field user
complaints that the diverter valve does not properly seal off the dump bed from the exhaust gases and heat are not valid
for dump trucks. Cargo trucks are available to users and should be used to transport combustible materials.
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