TM 9-2330-371-14&P
OPERATION - CONTINUED
Stopping
The brakes of the truck tractor and the semitrailer are applied at the same time in normal operation
when the driver steps on the brake pedal. Brake pressure must be applied gradually and smoothly.
The semitrailer brakes may be applied separately by using the trailer handbrake control lever on the
steering column. On steep downgrades or slippery surfaces, the semitrailer brakes must be applied
before the tractor brakes. This will reduce the possibility of jackknifing the semitrailer.
Parking
When parking the truck tractor and semitrailer to leave unattended, set the parking brake on the truck
tractor, apply the trailer handbrake control, and turn off the engine before leaving the cab. Block the
semitrailer wheels with chock blocks (7). Block behind front wheels on uphill grade, in front of back
wheels on downhill grade.
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