TM 9-2320-360-10
b. Backing Trailer
WARNING
In some cases when trailer is backed up, wheels on trailer will not
be straight when HET Tractor trailer is stopped and then driven
forward. Rear of trailer will swing wide right or left and may cause
injury to bystanders.
When backing, ear of trailer will always move in direction opposite of front wheels on HET
Tractor. Trailer will turn quickly. When HET Tractor front wheels are turned right, rear of
trailer will go left. When trailer has turned, and backing in a straight line is required, turn
HET Tractor wheels in direction trailer is moving. This will bring HET Tractor and trailer
in a straight line. Observe the following precautions when backing trailer:
(1) Adjust side mirrors for best visibility.
(2) Use a ground guide when backing HET Tractor/trailer. Ground guide must be visible to
operator at al times to provide backing instructions.
(3) Back up slowly and pay close attention to location and signals of ground guide.
c. Braking, Stopping, and Parking Trailer
During normal operation, brakes of HET Tractor and trailer are both applied when brake
pedal is pushed. Brake pressure must be applied gradually and smoothly, keeping in
mind that stopping distance will increase when trailer is being towed. The PARKING
BRAKE control will apply brakes to both the tractor and trailer. Trailer handbrake control
applies brake to trailer only. Do not apply trailer hand-brake control when parking.
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