What is a DMU and how does it work?. Here is an introduction to what a DMU is and the basics on the power train, control system and other parts.
Another great introduction to how DMUs work is one of the many staff training manuals, such as this one from the Southern Region.
More detailed information on different components:
|Engines:||The AEC 220; Leyland 680 intro; Leyland 680 variants; 1950s engine overhauls|
|Gearboxes:||Introduction; R14 gearbox; Mounting Brackets; Mounting bolts|
|Drive Train:||Fluid flywheel; Freewheel; Cardan shafts|
|Protection||Drivers Safety Device; AWS|
|Vacuum Brakes||Description; Operation; Exhauster; Automatic Feed Valve; Overhauling Feed Valves; Automatic Isolating Valve; Overhauling Isolating Valves; Brake Cylinder; Direct Admission Valve|
|Electrics:||Batteries; Fuses; Wiring; Dynamos and Alternators|
|Air System:||Unloader Valve; Throttle Motor; Wipers; Compressors;|
|Controls:||Coupling codes; Gear controller overhaul|
Technical manuals: BUT Manual for 5xxxx vehicles.
Servicing your DMU? A list of common consumables.
Many of the mechanical components for DMUs were supplied by British United Traction (B.U.T.). This was a joint venture between Leyland and A.E.C.