Smiths Spare Parts List March 1960 Click here
	CEPS 24 Overhaul And Repair of Smiths Combustion Heater for Diesel Multiple Units October 1972 Click here
	WOSS 830/4 Workshop Overhaul Specification Combustion Heater - Smiths July 1987, with revision for March 1988 Click here
	TSU 89/99 Diesel Multiple Units Generating Equipment & Combustion Heaters April 1989 Click here

Heater Wiring Diagrams
Diesel Fitters School- Diagram 1 - Diagram 2
Schematic - January 1992 (for 101s but applicable to others)
Cab control box (courtesy of John Joyce)
Heater Test Box (easy to make, and very useful in analysing faults
Flame Detection
Thermostat
Through vehicle control system

Left: A mass of overhauled heaters awaiting fitting, with more in bits behind being worked on. British Railways