When coupled with the MK48/16 tractor, the tractor/semitrailer combination will not
back like a normal semitrailer because of semitrailer steering system. The
operator must back tractor/semitrailer by turning tractor steering wheel in opposite
direction of what would be used for backing with a normal semitrailer with the
same tractor or injury to personnel and damage to equipment may result.
When backing, excessively sharp, oversteered turns will cause damage to
equipment. If angle between tractor chassis and gooseneck exceeds 60, damage
to tires may occur. If a steering angle exceeds 90, severe damage to semitrailer
steering components and tractor fifth wheel will occur. Extreme caution must be
exercised when maneuvering tractor/semitrailer in confined spaces (i.e., motor
pools, parking lots, filling stations) where oversteer angles can easily be achieved
through normal driving capability of the tractor or severe damage to equipment will
e. Backing with MK48/16 tractor. When backing, always use a spotter to guide you. Always use the mirrors when
backing and keep spotter in sight at all times. When backing, rear of semitrailer will move in the same direction
as front tractor wheels.
(1) If tractor wheels are turned right, semitrailer wheels will steer right and cause semitrailer to back to the left
with the tractor.
(2) If tractor wheels are turned left, semitrailer wheels will steer left and cause semitrailer to back to the right with