Clutch master cylinder dimensions

XK
1

I am considering using the 5/8 master cylinder from the XK for my E-type that currently has a 3/4. The thought is to reduce pedal effort using the smaller cylinder while still having enough pedal travel.

I am unable to get the dimensions on the cylinder from XKs unlimited and am hoping someone may have them or is able to measure them. Specifically I need the distance, center to center of the mounting holes in the flange, the diameter of the rubber dust cover over the pedal rod/cylinder and the length of the pedal rod/clevis from the flange to the end of the clevis or center of hole in clevis.

Any help is much appreciated. It’s part C12943

https://xks.com/i-23897128-jaguar-xk-150-clutch-master-cylinder-c12943.html?ref=search:https%3A%2F%2Fxks.com%2Fsearch.html%3Fq%3Dclutch%2Bmaster%2Bcylinder%26go%3DSearch

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2

From my XK150, they are:
holes are 2.25 in center to center
Rubber cap is 1.35 od, installed
Clevis pin center is 6 5/8 in from flange face, fully extended, with about 1/2 in of adjustment either way

3

Thank you very much, just what I needed. Only other issue is the fork disk retainer diameter which based on your rubber cap measurement should be quite close.

4

Not sure what you’re referring to ??

5

The retention ring OD or ID of the cylinder housing. I would need to use my existing fork which is a different length than what you measured.Thanks

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6

OK, gottcha. 0.84 in od

7

Thank you. You are a big help. That’s the exact OD of the gold one (aftermarket) in the pic.