CHROME NUT,OIL RETURN VALVE

Information relating to the Matchless G12 or AJS Model 31 650cc twin
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fullxavier
Posts: 2
Joined: Wed Aug 14, 2019 2:22 pm
Location: Ecuador

CHROME NUT,OIL RETURN VALVE

Post by fullxavier »

good morning someone who knows where I buy this valve, mine is defective, I need a new one for my Ajs model 31
Chessiegolf
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Posts: 54
Joined: Fri Dec 29, 2017 8:23 pm
Location: LINCOLNSHIRE UK

Re: CHROME NUT,OIL RETURN VALVE

Post by Chessiegolf »

You could try Acme Stainless in Lincoln, they have a good range of quality parts for AJS/Matchless

https://acmestainless.co.uk/product-cat ... cba1185463
JEAN-NOEL
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Posts: 601
Joined: Wed Oct 12, 2005 10:45 pm
Location: FRANCE

Re: CHROME NUT,OIL RETURN VALVE

Post by JEAN-NOEL »

Hello,
I think you are looking for the bolt with no return valve in the filter housing.
You can order it from AMOC PARTS : 023 332 OIL FELT FILTER HOUSING.
You have to join the Club to have part from AMOC.
Kind regards.
JEAN-NOEL
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Posts: 601
Joined: Wed Oct 12, 2005 10:45 pm
Location: FRANCE

Re: CHROME NUT,OIL RETURN VALVE

Post by JEAN-NOEL »

Sorry : the right nght number is 023 331
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ajscomboman
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Posts: 3963
Joined: Mon Jan 01, 1990 12:00 am
Location: HAMPSHIRE UK

Re: CHROME NUT,OIL RETURN VALVE

Post by ajscomboman »

No you can't we have no stock, no idea when they will be available again either now Andrew Engineering have retired. It'll be on my list for new suppliers to look at though.
fullxavier
Posts: 2
Joined: Wed Aug 14, 2019 2:22 pm
Location: Ecuador

Re: CHROME NUT,OIL RETURN VALVE

Post by fullxavier »

Hello friends, thank you all for your comments and suggestions, I explain my problem, this check valve does not work well, the spring no longer exerts adequate pressure and lets the oil in the tank and the tank where the distribution chain is filled until it drips a lot and it is time to be completing the level every moment, that is to say that valve does not work well and I want to replace it, I appreciate the help you can give me to find a new one and change it thanks
JEAN-NOEL
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Posts: 601
Joined: Wed Oct 12, 2005 10:45 pm
Location: FRANCE

Re: CHROME NUT,OIL RETURN VALVE

Post by JEAN-NOEL »

Hello,
your problem is well known : wet sumping...
A new no return valve would not solve it :the little ball in the oïl filter cap is here only to keep oïl in the camshafts tunnels.
Oil seeps through oïl pressure pump, plain bearings, et c.
To avoid this problem you can start your engine every week to scavenge the sump, or you can fit a tap on the feeding hose.
There are lots of topics regarding this problem on the forum.
Kind regards.
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