Clutch / Gearbox Identification and lock washer

Information relating to the Matchless G11 or AJS Model 30 600cc twin
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Clutch / Gearbox Identification and lock washer

Postby MartinAmes » Thu Aug 30, 2012 7:07 pm

I have a Matchless G11 with a 1956 engine. After taking various bits apart to remove the engine to get it repaired, I have come to put the clutch back together. The lock washer for centre retaining nut is in poor condition and needs replacing.

The spares list shows a 5 spring 5 plate clutch.
I have a 3 spring 5 plate clutch and the lock washer is clearly different.
I believe I have an AMC gearbox.

Can anybody tell me what the correct code is for the lock washer for my clutch so I can order one, and also what spares list / diagram I would find this clutch in.

I have placed various photos under the pictures section, showing the clutch, old / new wrong lock washer, gearbox number.

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Clutch / Gearbox Identification and lock washer

Postby Don Madden » Thu Aug 30, 2012 7:43 pm

It is an AMC Gearbox & clutch. Comparing the serial number with those in the North American Section registry it fits into the 1961 range. The "R" indicates close ratio, probably from a CSR. The correct lockwasher, 040374 is a thin split lock washer, not a tab washer. Cheers, Don.

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Clutch / Gearbox Identification and lock washer

Postby ajscomboman » Thu Aug 30, 2012 7:50 pm

The new lock washer shown is for a Burman clutch and the worn out one I'm not sure about. The parts service do stock locking washers for the AMC clutch which is what you require.

(040374)
LOCK WASHER FOR CLUTCH RETAINING NUT.AMC CLUTCH. 0.79
EACH

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