Series 1 Clutch Slave Cylinder

norman m. macleod · Post by **norman m. macleod** » Fri Sep 13, 2013 12:02 pm

Hi All,
Can any one tell me why there are two options listed (by SNG anyway....) for the above. One is C21470 (80mm long), and the other is C29801 (95mm long). What's the difference...? Refrain from telling me it's 15mm, please........
To further confuse me, the Jaguar Spare Parts list I have lists this part as C24145......
I didn't have one on the car (1967 2+2) when I bought it ( in a million pieces.....)
Thanks, and
Best Regards to All,
Norman

Post by **Heuer** » Fri Sep 13, 2013 12:13 pm

There are two types of clutch slave. The short one (80mm) requires a small bracket/return spring and is manually adjustable. The long version (95mm) is the 'hydrostatic' version which is self adjusting and does not need the return spring. You can fit either but you need to ensure you also fit the associated parts - adjustable rod, spring & bracket for the short version; correct rod for the hydrostatic - no mixing and matching under any circumstances. The hydrostatic one was fitted from 1967 onwards IIRC. One suggestion I do have though is to try and buy a NOS Lockheed slave off eBay rather than the repro ones currently on offer. I had two new ones that leaked and I eventually fitted a Lockheed one and that has been perfect. In fact I just bought another NOS boxed Lockheed one that came up on eBay. There is an original Jaguar boxed 80mm one available at the moment which would be worth grabbing: http://tinyurl.com/pb4zlav

norman m. macleod · Post by **norman m. macleod** » Fri Sep 13, 2013 1:29 pm

Hi David,
Thanks for the comprehensive explanation......Also,I just bought that one on E-bay you gave me the link to....
Best regards,
Norman.

richard btype · Post by **richard btype** » Tue Sep 24, 2013 5:41 pm

Norman

I know this is probably a long shot but did you used to live in Wareside in the UK about 20 plus years ago?

Richard

norman m. macleod · Post by **norman m. macleod** » Tue Sep 24, 2013 7:12 pm

Hi Richard,
Not me, I'm afraid.......I was born in the UK, but departed those shores in 1967, 46 years ago......
Best regards,
Norman.

rfs1957 · Post by **rfs1957** » Wed Sep 25, 2013 7:14 am

Anyone working on the Clutch Slave might like to know that in an attempt to move the pedals further forward (long legs) I had the 7/8" slave re-sleeved to 3/4", which gives a 28% reduction in travel, albeit with a 28% increase in effort.

I find the heavier pedal - paradoxically - easier to drive with and the shorter pick-up nicer to use, and have now got the clutch pedal at rest some 50mm closer to the bulkhead.

christopher storey · Post by **christopher storey** » Wed Sep 25, 2013 11:05 am

To nit pick , it would be a 36% increase in effort

PeterCrespin · Post by **PeterCrespin** » Wed Sep 25, 2013 11:28 am

To nit-pick somewhat more substantially (louse-pick?), the reported change would increase travel, not reduce travel.

Pete

PeterCrespin · Post by **PeterCrespin** » Wed Sep 25, 2013 11:35 am

christopher storey wrote:To nit pick , it would be a 36% increase in effort

I just did what I think was the maths and I got 27.7%

How did you get 36%?

PeterCrespin · Post by **PeterCrespin** » Wed Sep 25, 2013 11:39 am

Oh dear, slave, not master was re-sleeved. Rory was right. Duh. Not come across a re-sleeved slave.

rfs1957 · Post by **rfs1957** » Thu Sep 26, 2013 8:15 am

Not sure who comes off worse from this exchange.

Christopher is dead right, it's a 36/49 drop in effort if you go from 3/4 up to 7/8 on the slave bore, hence the 27%, but a 49/36 raise in the effort (36%) the way I've done it - which is 7/8 down to 3/4.

Either way I can recommend the modification.

ChrisC · Post by **ChrisC** » Thu Sep 26, 2013 11:33 am

Great timing - my slave cylinder is leaking too... thats 1 year from new.

So I have just purchased one of those Jaguar ones on the Ebay link. Thanks for that... :)

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