I have scanned an article from Newnes Motor Cycle Repair and Upkeep (looks like it’s just pre-war)… and to be honest I’m not sure whether it promotes best engineering practice … there’s some evidence of the use of big lumpy hammers!… so here’s the first 3 pages. If people say ‘oh no, not that old article… it’s all completely wrong’ I won’t put up any more. If the rest of the article is wanted I will upload the remaining pages. NB. I am a complete newbie so can’t judge the correctness of advice given in the article.
Don’t worry about lump hammers.I use a lump hammer and aluminium bar to separate crankshafts and a lump hammer together with a sledge hammer as a dolly to knock up cranks. Sounds brutal but is the way to go if used properly.
I think the Newnes “Motor Cycle Repair and Upkeep” booklets were published around 1931-1932. They were sold in 14 weekly parts for one shilling each. Many years ago an elderly friend gave me his 14 volume set and told me that everything I needed to know about vintage motorcycle maintenance was there – and they remain a great source of generally very reliable advice and guidance.
BUT the chapter on Scott engines does need a caveat. Last night I saw Glyn Chambers at our Christmas party and he handed me a note which I promised I would post on the website. It reads:
You need to use a big hammer to knock cranks apart or together – however if you do it as the book shows you stand a very good chance of smashing a c/case cup. Get someone to hold and take the weight on the flywheel as you bash the centre bolt head. When “knocking up”, support the weight on the opposite crank. 3 hard blows are enough.