TB 9-2320-279-13&P-4
0012
2
PARKING
BRAKE
EXEXEX
EXEXEX
TRAILER
AIRSUPPLY
EXEXEX
ENGINE
OFF
ON
START
AIRBRAKE
Figure 24.
CAUTION
Use wheel chocks when uncoupling tractor vehicle from semitrailer. Failure to comply may
result in damage to equipment.
NOTE
If semitrailer is parked on level ground; put one wheel chock in front of tire on one side and one
wheel chock in back of tire on other side of tractor vehicle.
If semitrailer is parked uphill; place one wheel chock on each side of semitrailer in back of tire.
If semitrailer is parked downhill; place one wheel chock on each side of semitrailer in front of
tire.
18. Chock semitrailer wheels (refer to TM 5-2330-37814&P).