Coupling and Uncoupling.

TM 9-2320-273-10

2-17. Coupling and Uncoupling.

Do not permit anyone to stand directly behind your

tractor or the semitrailer during the coupling procedure.

Failure to follow this warning can result in injury to

personnel.

Proper use of chock blocks will prevent damage to

equipment. Use chock blocks in the manner described

in the note below.

COUPLING

Remove chock blocks from their brackets and place them

firmly behind the wheels on both sides of the semitrailer.

On level ground, wheels of one axle should be blocked;

if one side is blocked at the tire's front, the opposite side

should be blocked at the tire's rear.

UNCOUPLING

Place chock blocks firmly behind wheels on both sides of

the semitrailer when parking uphill. Place blocks in front

of wheels on a downgrade. On level ground wheels should

be blocked on one side in front and one side in rear.

2-63