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TM 9-2330-272-14
2-10. COUPLING SEMITRAILER TO TOWING VEHICLE (Con’t).
i.
Fully retract Ianding gear legs (11).
j .
If used, stow ground boards (14) in stowage brackets.
k.
Remove chock blocks and stow In stowage brackets.
2-11. TOWING INSTRUCTIONS.
a .
Driving.
(1) When driving towing vehicle and semitrailer, overall length of unit must be kept in mind when
passing other vehicles and when turning.
(2) Turning and backing operations wiII be affected because towing vehicle and semitrailer are a
hinged unit.
(3) The semitrailer load wilI affect stopping and overall maneuverability. A partial load should be
distributed equally between compartments. This can be accomlplished by closing all outlet valves and opening all
emergency relief valves and manifold valves. Allow several mlnutes for fuel level to stabilize. Close all emergency
relief valves and manifold valves.
(4)
Always tow semitrailer at safe speeds and note any driving irregularities.
b.
Turning.
(1) When turning corners, allow for semitrailer wheels to turn inside the turning radius of towing vehicle.
(2) To make a right turn at an intersection,drive towing vehicle halfway into intersection, then cut
sharply to right. This will allow for shorter turning radius of semitrailer.
c. Stopping.
(1) For safe stopping apply brakes gradually and smoothly.
(2) During normal operation, apply towing vehicIe and semitrailer brakes simultaneously. On steep
grades and slippery surfaces, apply semitrailer brakes before towing vehicle brakes. This will help prevent semitrailer
from jackknifing or swinging out of line of travel.
d. Parking.
When towing vehicle and semitrailer combination is to be parked, set brakes on both vehicles. Place
chock blocks in front of or behind wheels, as required.
e.
Backing.
(1) Use a ground guide to ensure safe backing operation.
(2) Adjust all towing vehicle rearview mirrors before backing.
(3) If semitrailer is to be backed to right, turn towing vehicle steering wheel to left (counterclockwise). If
semitrailer is to be backed to left turn towing vehicle steering wheel to right (clockwise).
(4) When semitrailer has turned and backing in a straight line is required, turn towing vehicle wheels in
direction semitrailer is moving. This will slowly bring towing vehicle and semitrailer into a straight line.
2-12. UNCOUPLING SEMITRAILER FROM TOWING VEHICLE.
WARNING
All personnel must stand clear of semitrailer and towing vehicles during uncoupling
operation. Failure to follow this warning may result in serious injury or death to
personnel.
a. Remove chock blocks from stowage brackets and chock wheels.
2-21
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