- 25 Clutch26
- 27 Automatic transmission7
- 29 Pedal assembly9
- 31 Frame, trailer operation5
- 32 Suspension20
- 33 Front axle6
- 35 Rear axle7
- 40 Wheels, chassis alignment check50
- 41 Propeller shaft3
- 42 Brakes - hydraulic and mechanical systems93
- 43 Brakes - pneumatic system and auxiliary brakes4
- 46 Steering8
- 54 Electrical system, equipment and instruments38