Sep `76
CCE-IHC 20 Ton Dump Truck Hot Asphalt Handling Mission
1. Information from field user units -state that the CCE-IHC Paystar F5070 Dump Truck, 6x4, 71,000 GVWR, has had
damage to its rear combination lamps and splash guards when dumping hot asphalt into asphalt paver hoppers.
2. The user further reports that, to correct this situation, they fabricated "U" type, splash guard brackets and fastened
them to the underside of the dump bed to hold the splash guards up away from the asphalt mix during dumping. The rear
combination lamps were inverted and raised. An extension shield was fabricated and added to the bottom rear portion of
the dump bed to prevent the asphalt mix from falling in between the paver hopper and the rear of the truck.
3. Similar modifications to those made by the reporting user unit are fabricated on the dump trucks used by commercial
asphalt paving contractors.
4. Those using units whose mission includes handling hot asphalt mix for pavers could fabricate splash guard holders,
raise the rear combination lamps up higher, and add a bolt-on type spill pan extension as necessary, following commercial
practice of local paving contractors in their local area. Sheet metal deflectors below the rear combination lamps can be
used to deflect the asphalt mix back into the hopper. Some pavers use captive chained alligator battery clamps to hold
the splash guards out of the way of the asphalt mix.
5. Both the dump truck driver and the asphalt paver operator need to coordinate their signals to smoothly and easily
dump the CCE dump truck's payload into the hopper with as constant a mix flow as possible. The CCE dump truck's
payload is about 3-times the volume of the previous M51 GI dump truck, so the driver has to take it very easy with his
dumping rate. If he does not, the mix will overload the paver's hopper. The force of the hot asphalt mix, trying to leave
the dump body, will cause the mix to flow forward and up in between the rear of the dump body and the front of the
hopper. Here, the hot mix will remain long enough to cause damage to the lamps, splash guards, brake chambers, and
o
other parts that cannot withstand the 400 F, heat. Hot asphalt mix acts like a thick liquid. With the dump body raised too
high, the weight of the mix still in the body tends to have a squirting effect on the mix in the hopper. While the 16 1/2 foot
long body has a lower center of gravity for roading stability, this same feature results in a large force downward on the
asphalt mix when the body is being raised during dumping. The paver operator, in addition to following his paver guide
marker, keeping his lane thickness even and speed under control, must now direct the truck driver's rate of feed into the
hopper to keep it filled, neither short of mix nor overloaded.
124
