Home › CDL Practice Tests › General Knowledge Questions › Question 146
During the coupling walk-around you find the kingpin itself is bent. What is the right decision?
- A.Couple anyway and drive slowly
- B.Use extra grease so the jaws slide on
- C.Do not couple to that trailer until the kingpin is repaired, because a bent pin may not lock or may fail under load
- D.Straighten the pin with the tractor frame
Correct answer
C. Do not couple to that trailer until the kingpin is repaired, because a bent pin may not lock or may fail under load
Why
The kingpin is the single part the whole connection depends on, and bending changes both its fit in the jaws and its strength. No load or schedule justifies trusting a visibly damaged pin.
Manual topic: Combination Vehicles - Coupling Faults · From the General Knowledge practice bank (GK-146).