- 25 Clutch61
- 26 Manual transmission44
- 27 Automatic transmission7
- 29 Pedal assembly4
- 31 Frame, trailer operation3
- 32 Suspension22
- 33 Front axle24
- 35 Rear axle19
- 40 Wheels, chassis alignment check50
- 41 Propeller shaft3
- 42 Brakes - hydraulic and mechanical systems119
- 43 Brakes - pneumatic system and auxiliary brakes26
- 46 Steering65
- 54 Electrical system, equipment and instruments40