LOADING AND UNLOADING ABLE PAYLOADS (CONT)
b. Unloading an able payload. To unload an able payload, proceed as follows:
(1) If tractor and semitrailer are already coupled, proceed to step (2). If tractor/semitrailer are uncoupled, perform
Unload semitrailer on level ground whenever possible. In adverse conditions,
unloading can be done on grades up to 10 percent with a maximum offset angle of
10 degrees between tractor and semitrailer. Avoid exceeding this limitation to
prevent payload from rolling off semitrailer and causing injury to personnel and
damage to equipment.
(2) Aline back of tractor/semitrailer combination with area to be unloaded. Make sure ample amount of space is
provided for ramps to be lowered and payload to be off loaded past end of ramps on the ground as level as
(3) Visually check tractor/semitrailer offset angle by having spotter check relationship between steering wedge
bolt and weld circle at bottom rear of pickup plate. If inside edge of bolt alines with outside edge of weld
circle, offset angle is 10 degrees. Make any required adjustments to tractor.