1 Driver seat
  2 Assistant driver seat
  3 Driver control desk
  4 Control cubicle
  5 Load regulator
  6 Main & auxilliary generators
  7 Traction motor blower
  8 Maybach MD655 engine
  9 Silencer & exhaust outlet
10 Turbocharger & air inlet
11 Emergency fuel tanks
12 Hydrostatically driven radiator fan
13 Radiator header tanks
14 Northey RE125 exhauster
15 Brake air reservoirs
16 Compressor after cooler
17 Radiators with automatically adjustable louvres for cooling
18 Spanner Mk.3B train heating boiler
19 Air reservoirs
20 Air compressor suction strainer
21 Main air reservoir
22 Wash basin
23 Toilet
24 Air compressor
25 Line-side water filler ducting
26 Hydrostatic pump for fan drive
27 Pre-heater
28 Horns
29 Cab heater
30 Handbrake
31 Main fuel tanks
32 Battery boxes
33 Boiler water tank
34 Walkways
35 Generator cooling air filters
36 Traction motors
37 Cast steel bogies
38 Sanding boxes
Diagram reproduced by kind permission of Brush Traction.