The iron trailer supports are up, and the trailer is resting on the tractor. Make sure that
a) There is enough clearance between the tractor frame and the landing gear
b) The safety latch is in the unlocked position
c) There is enough clearance between the upper and lower fifth wheel
Answer: a) There is enough clearance between the tractor frame and the landing gear
If the answers is incorrect or not given, you can answer the above question in the comment box. If the answers is incorrect or not given, you can answer the above question in the comment box.