When troubleshooting a hard steering problem on a highway tractor that occurs only when towing a loaded trailer,which of the following should be checked out first?
A) trailer suspension
B) fifth wheel lubrication
C) tractor rear suspension
D) tractor kingpin lubrication

Question

Quizplus · Accepted Answer

The fifth wheel lubrication should be checked first because inadequate lubrication can cause increased friction between the tractor and trailer, leading to hard steering when towing a loaded trailer.

When Troubleshooting a Hard Steering Problem on a Highway Tractor