If excessive force is applied when tightening the lower wheel nut on the rear tire carrier, it may damage the threads on the check nut A-21846-S- 7, causing the stud to come out when removing the wheel nut.
To prevent this condition, a lockwasher A-22330 acting as a spacer is now assembled behind the check nut. (See Fig. 1140.) This reduces the thread length of stud A-1449-C, 1/16”.
When spare wheel and tire lock assembly is installed, lockwasher A-22330 is replaced by spare wheel and tire lock band.