COUPLING SEMITRAILER TO TOWING VEHICLE
All personnel must stand clear of towing vehicle and semitrailer during
coupling operation. Failure to follow this warning may result in serious
injury or death to personnel.
1. Chock semitrailer wheels.
Have assistant direct you during backing operations. Damage to equipment
may result if caution is not followed.
2. Align towing vehicle with semitrailer and slowly back towing vehicle so that kingpin (6) aligns with
coupler jaws (9). Ensure that kingpin is at proper height to engage fifth wheel (8). Minimum kingpin
height is above tractor approach ramps (10). Maximum kingpin height is 1 1/2 in. (3.8 cm) below fifth
wheel (8). Adjust height of semitrailer with landing gear hand crank (5).
Figure 2. Kingpin and Hand