Triumph produced in house training material. I have collected a number of the The Service Training Notes series. These notes were originally given out as a record of a training course given to staff who serviced the cars. The staff would have first watched a film. It would be good if somebody could digitise those films. Here are some downloadable PDF copies of the notes.
I have also got copies of some later Dealer Training notes
Triumph 1147cc engine service training notes This booklet deals with the 1147cc but is also relevant to the later 1296cc engine as used in both the Herald and Spitfire.
Triumph Slant 4 Engines 1854cc and 1998cc Service Training Notes. Triumph used the slant 4 engine in the Dolomite 1850 and the TR7. The Dolomite Sprint had a 16 valve head on the slant 4.
Triumph Service Training Notes Differential Unit Herald range, Spitfire, GT6 and Vitesse.Shows how to dismantle and reassemble the differential unit. Lots of useful pictures.
Triumph Service Training Notes Disc Brakes Herald & TR Also applicable to other Triumphs built at the time such as GT6, Vitesse and 2000.
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Triumph Engines - Triumph Service Training Notes These notes detail the 4 and 6 cyclinder engines used in the Spitfire, Herald and Vitesse amongst other models.