Author Topic: One way disc valve  (Read 4362 times)

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Offline Ian

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One way disc valve
« on: 15 Mar 2007 at 02:42 »
Folks, I am looking for one or two complete one way disc valve assemblies as used in the oil system of most total loss Douglases. Not the one at the bottom of the hand pump, the one I want is the one that screws into either the front barrel or crankcase. Anyone help ? ...Ian

Offline Doug

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Re: One way disc valve
« Reply #1 on: 15 Mar 2007 at 04:34 »
What size do you have? There are two that I know of and possibly more. If the cylinder is tapped for 7/16-20, then I made a batch of these years back to suit my F28 (600EW), and still have some about. Then there is the type used on the 350cc EW, with a 5/16-25 thread, and extended body to clear the cylinder hold down nut. These use the same internals and top half of the housing. I made one for my EW, and could supply a dimensioned drawing. The top housing of both are threaded 7/16-20 for a tubing fitting.


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-Doug

Offline Ian

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Re: One way disc valve
« Reply #2 on: 15 Mar 2007 at 04:51 »
Doug, its the common one I need with 7/16 thread. Would be greatful if you could bring one with you and I could fix you up when you are here ?

Offline Doug

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Re: One way disc valve
« Reply #3 on: 15 Mar 2007 at 13:20 »
Right, I'll pack one in the luggage and try to smuggle it through!  :)

-Doug

Offline Chris

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Re: One way disc valve
« Reply #4 on: 15 Mar 2007 at 15:53 »
The disc and spring for the non-return valves are held in London Douglas MCC pre-war spares and are available to members of the Club. Chris.