Lufkin Dump Trailer, Руководство пользователя

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Page 33
9.5 UNLOADING PROCEDURES
9.5.1 STOCK PILE
The most common method for unloading most commodities from an end dump trailer is to
discharge the load onto a pile. A clean, compacted, level dump site is required. Any rapid tractor
acceleration/deceleration should be avoided with the trailer body elevated to reduce dynamic
tailgate impacts. These humping forces exert high stresses on both the hydraulic systems and the
trailer structural members.
9.5.2 HOPPER
Unloading into a hopper using a conveyor system to transfer the cargo elsewhere is a common
method of unloading. Spillage in front of hoppers should be cleaned up to maintain a level surface.
9.5.3 WINDROW
The most common method for discharging material from a bottom dump is windrow dumping. In this
method, the chains on the doors are set to open to the desired width of the windrow, and the trailer
is advanced (usually in a low gear) until the desired length of the row is accomplished. The doors
are then shut and the trailer can move to make another windrow if desired.
9.5.4 SPREAD OPERATION
In road construction, a uniform distribution or material spread is desirable so that the road grader
time is minimized. Common hazards to this type of operation include insufficient overpass
clearances during spread, loading buildup on tailgate due to restricted flow, dumping on crown of
road, and going over previously unevenly spread material. An elevated dump body can go up as
high as 35 feet or more, requiring constant observation for overhead obstructions including
electrical wires.
BEFORE RAISING THE BODY, OBSERVE OVERHEAD FO R
ELECTRICAL WIRES AND BOTH SIDES AND REAR OF THE
TRAILER FOR PERSONNEL AND OTHER VEHICLES. DO NOT
RAISE THE BODY IF ANYONE OR ANYTHING IS CLOSE ENOUGH
TO THE TRAILER TO BE HIT IF THE TRAILER TIPS OVER, OR IF
ANYONE IS HEADING INTO THE AREA. PERSONNEL IN THIS
AREA MAY BE INJURED IF THE TRAILER IS MISOPERATED AND
TIPS OVER.
ALWAYS MAKE SURE THAT THE CHAINS AT THE FRONT AND
REAR OF THE DOORS ARE SET THE SAME, OTHERWISE GATE
TWISTING CAN RESULT IN PERMANENT DAMAGE TO THE
GATES OR HINGES.