PREPARATION FOR USE (Con't)
6. Visually check coupling.
There must be no daylight between kingpin plate (15) and fifth wheel (17).
Kingpin (7) must not be hooked over front of fifth wheel (17).
Ease tractor forward to check coupling. If coupling is not locked, rock tractor back and forth slowly until kingpin
If coupling failed, repeat steps 1 through 7.
Raise cover on semitrailer electrical receptacle connector (20) and push electrical cable (21) straight in.
10. Connect service air line (22) to right semitrailer service air coupling (23).
11. Connect emergency air line (19) to left semitrailer emergency air coupling (18).
12. Check air lines (19 and 22) and electrical cable (21) to ensure that they are supported, and will not catch or
13. Turn on tractor air supply, and apply tractor brakes to pressurize semitrailer airbrake system.