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Slave Cylinder Rebuild

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tntriumph59

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Hey guys,

I took my slave cylinder off, and plan to rebuild it. I am having a hard time finding the spring that goes behind the piston. My question is does anyone know where I can get a new spring, and how much tension is the spring supposed to have? The old one barley has any spring to it. Also when I open the slave cylinder it looked like mud inside. What would cause that?

Thanks for the help.
 
If you have a 59 TR3A, then there isn't supposed to be a spring in there.

Otherwise, it might help if you told us what car you're working on. Contrary to popular opinion, they aren't all the same.
 
I rebuilt mine with the piston, cup, and spring from a box of used parts from either or both a Chevy and a Ford. The piston fit well in the slave bore and the cup also fit well. The spring fit against the taper in the cup and was an inch or there about longer than the inside of the slave. That was done about 4500 miles ago in Provost, AB and is working great. I should try and find out exactly what the parts are from for future reference.

TR3driver said:
If you have a 59 TR3A, then there isn't supposed to be a spring in there.

Otherwise, it might help if you told us what car you're working on. Contrary to popular opinion, they aren't all the same.
Click to expand...

Of course that is right. I didn't give that a thought.
 
Sorry about that it is a 1959 TR3A. The slave cylinder is the Girling style. Please see the photos below.
photo93.jpg

photo92.jpg

photo9.jpg

photo91.jpg
 
The internal spring is used on later cars with the "self adjusting" clutch, so commonly supplied with replacement cylinders. Some of the rebuild kits used to include it as well but I don't know of any that still do.

However, the TR2-4 use an external return spring that is supposed to pull the piston to the bottom of the bore, so the internal spring is not needed and should be removed if supplied.
 
CJD said:
Is there something wrong with the spring in the pic?

John
Click to expand...

Thats a good question. Im not sure how much tension that spring is supposed to produce, but currently it is very little. If that is how it is supposed to be I will leave it out, and put it back together. I have currently ordered a new exterior spring and anchor plate.
 
I can't remember if I rebuilt mine with a spring or not...but I totally see what Randall is talking about. The piston is held all the way in by the external spring, and pressure pushes it out, so a spring in the bore is completely redundant.

So, I don't think it will matter whether you use one or not, so long as it cannot overpower the external spring!

John
 
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