When hooking up a tractor to a trailer, the trailer is at the proper height when:
|
|
The coupling surface of the trailer is just above the middle of the tractor fifth wheel
|
|
|
The trailer dolly wheels are just barely off the ground when fully extended
|
|
|
The coupling surface of the trailer is just below the middle of the tractor fifth wheel
|
|
|
The kingpin is just below the middle of the tractor fifth wheel
|