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General => Douglas Motorcycles - General Discussion => Topic started by: hartleys1 on 09 Dec 2018 at 18:32

Title: EW 350cc Sports Restoration Timing Case Query
Post by: hartleys1 on 09 Dec 2018 at 18:32
I have just re-bushed the timing gears / cams and noticed they run against the crank case should there be a shim
between the cam and the case.
it seems unusual to have an irregular shape running against the alloy case all though the spindle hole is bushed.

I appear to have missing Part number 8412 Distance collar for cam listed in the parts  book under valve operating mechanism group.
Can anyone supply me the dimensions? if I know where it fits I can make one.

Thanks Keith Hartley
Title: Re: EW 350cc Sports Restoration Timing Case Query
Post by: Clive on 09 Dec 2018 at 20:55
Hi Keith
No shimming required , when you fit the cam followers all will become apparent
regards
clive
Title: Re: EW 350cc Sports Restoration Timing Case Query
Post by: hartleys1 on 10 Dec 2018 at 09:30
Thanks Clive.
I  just need to know about the distance collar
Keith
Title: Re: EW 350cc Sports Restoration Timing Case Query
Post by: Doug on 11 Dec 2018 at 06:08
Keith,

Not sure what #8412 would be. Some models drove the oil pump off the inlet cam and those had extended hubs with a drive slot; but the EW switched early on to driving the oil pump via a worm on the end of the crankshaft. The cam wheels float freely on the cam spindle, trapped axially between the tappets of the front and rear cylinders. There shouldn't be anything touching or abutting either end of the cam, like a distance piece.

-Doug
Title: Re: EW 350cc Sports Restoration Timing Case Query
Post by: hartleys1 on 11 Dec 2018 at 08:24
Thanks Doug.
Should have put in my original post that  its a 1927 model,
that explains why I couldn't see anywhere to fit a collar.
Keith