5-6
Working the Truck
Dumping
The dumping operation usually depends upon the type of material being hauled.
For instance, overburden and other waste material is usually dumped over a
spoil bank or piled into large mounds. The dumping on a job of this type might be
controlled by a dump 'SPOTTER', 'FLAGMAN' or 'BANKSMAN' or second
person who directs the truck to its dumping area. The 'SPOTTER' is needed due
to the limited rear visibility the operator has with a loaded truck of this size.
While backing to dump, the operator must watch the 'SPOTTER' at all times and
follow his direction. Under no circumstances should the operator leave his seat
to gain better visibility while backing. Always remain seated to maintain
maximum machine control.
Mineral ores, blasted rock etc., are usually dumped into a hopper or crusher
where it is processed before shipment. When dumping into a hopper, the
operator, in order to avoid excess wear on the tyres, must avoid hitting the
protecting rail at the hopper. If a DRIVEOVER HOPPER is used, the operator
must avoid rubbing the tyre inner sidewalls.
When hauling dirt or rock from a borrow pit into a fill area such as an earth-fill
dam, the load is usually dumped in a string with other loads and the loads
smoothed out with a crawler tractor. When dumping on a fill of this type, the
operator usually works alone and picks his own dumping place. To save
bulldozer work and cleaning up, the load should be dumped as close as possible
to the preceding load. The operator should pull past the preceding load, turn in
line with the string and back his truck until it is within a few feet of the last load.
This assures that the load will fall in the right place.
No matter what kind of job the operator is working, there are a few things which
are common to all jobs and which the operator should observe -
When dumping over a spoil bank without a 'SPOTTER', know how
close the machine can safely approach the edge under all weather
conditions. If in doubt as to dumping safety, dump the load a safe
distance from the edge so that it can be pushed over the edge later.
Watch Spotter
2049
Never Leave Seat2050
Watch Inside Duals
2051
Keep Wheels Level
2052
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