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Routine inspection will bring attention to the time when repair or replacement will be necessary.
10.2 BOTTOM DUMP MAINTENANCE
10.2.1 DOOR HINGE PIVOT PINS
There are (4) four door hinge pivot pins that are equipped with grease fittings. They should be
periodically greased to keep them operating properly. Grease with a premium grade of wheel
bearing grease.
10.2.2 FIFTH WHEEL ASSEMBLY
The upper fifth wheel assembly needs greasing periodically to prevent wear and flush out foreign
matter at the exposed pivot points. There are two (2) grease fittings on the plate to grease the fifth
wheel, which may be done without disconnecting the trailer from the tractor. Grease with a premium
grade of wheel bearing grease.
10.2.3 AIR LINE LUBRICATOR
A bottom dump trailer is equipped with (2) air cylinders that control the operation of the doors.
These cylinders are equipped with an air line lubricator. This
lubricator is provided to ensure
smooth operation of the cylinders. The oil level and filter should be checked periodically to ensure
that the lubricator continues to remain effective. Add oil and clean the filter as needed.
10.2.4 DOORS AND WALLS
Periodic inspection of the inside of hopper is imperative. It is known that sand and gravel, as well as
other abrasive materials, will, over time, wear out the steel doors and walls. Wear rate is greatest
on the lower half of the walls and the doors. It is also encouraged to inspect you entire trailer for
cracks to identify areas that may need attention.
Routine inspection will bring attention to the time when repair or replacement will be necessary.
THE FLOOR IN THE ULD-II MODEL IS AN INTREGAL PART
OF THE TRAILER STRUCTURE AND MUST BE KEPT IN
GOOD REPAIR. IT IS SUGGESTED THAT SOME TYPE OF
BED LINER BE USED WHEN HAULING HIGHLY ABRASIVE
LOADS.
