00 – Service
01 – Engine Top
02 – Engine Bottom
03 – Engine Consumables
04 – Engine Control
05 – Intake Exhaust
16 – Cooling (Internal)
17 – Cooling (External)
18 – Fuel System
19 – Exhaust
20 – Clutch System
22 – Gearbox (Main)
23 – Gearbox (Add-Ons)
24 – Propshaft
30 – Steering
31 – Axle Front
32 – Axle Rear
33 – Suspension
35 – Chassis
40 – Brakes
42 – Air Brakes
50 – Cab Body
51 – Cab Interior
52 – Cab Exterior
60 – Electrical Engine
61 – Electrical Chassis & Cab
80 – Consumables
81 – Miscellaneous
82 – Lubricants
85 – Wheels