B.Wadsworth:
Hi, Ray ,We had an ex ARMSTRONGS ,MAULDSLEY ARTIC UNIT ,A E C 7/7 engine mph 5 speed box ,38 mph up hill down dale ,massive cab room to dance ,brakes were oil over vacume ,verry poor our fitter put an hydrovac to it ,it would stop on a 6 pence , just abit of usless info Cheers Barry
Useless, I dont think so, The young drivers today wont have a clue about Oil over vacum, Or the more modern Hydrovac system, I love to hear all this old talk about the good old white knuckle days going over Shap & Standedge & The Valleys in South Wales with the Old Atki the I drove in the late 50s, I had some hair raising moments I may tell you, The brakes were ■■■■■ , Even at 32 MPH Top speed, But im still here to tell the story 
, Regards Larry.