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Clutch Slave Cylinder


shadowbane

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Ok so first lets make sure i have this right, the slave cylinder is the little pump (for want of a better word) under the tunnel that presses when the peddle is pressed yes?

if that's the case...When removing this should it not be full/awash with clutch fluid? or should the recess where the little arm is be dry?

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firebobby wrote:
Yes it's the alloy cylinder by the gearbox and yes it should have some fluid in it to push the piston inside when the pedal is pressed. :)


around the pin? greased or some of the clutch fluid? mine was bone dry in there  :-/

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Pin? :-/ on one end of the cylinder you have a bleed nipple and the fitting for the pipe and on the other, there's a rubber grommet which the metal bar/rod goes through, this rod sits inside the slave cylinder one end and the other end is pushed against the clutch fork.
The inside of the cylinder should be dry and quite shiny.
John

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logicaluk wrote:
stupid question but is there any free movement in the clutch pedal? my master cylinder wasnt returning all the way & this was giving a very low biting point.
Dan


you mean before the bite? or loose?....all i know is the bite was about an inch or two off the floor....grinding at that point on in and out of gear...slightly intermittant....can't check at the moment as no oil in :/

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Two things you should look out for . One is that the slave is pushed in fully before doing up the pinch bolt as there is a bit of movement there.  Two if there is any wear in the clevis pin on the clutch peddle where it operates the master (under the rubber boot) or the holes are obling then that little bit of movement results in a lot of free play at the other end.

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shadowbane wrote:


i do :)


So that blows my theory out of the water then.
I hadn't noticed my pedal bite getting closer to the carpet with resulting gnashing of gears.  From the forum I learnt the missing return spring was essential.
After fitting one I pushed the pedal to the floor and let it fly back unrestrained, after repeating this a few times the pedal bite returned to where it should have been with clear gear changes. Guess I was lucky.

8)

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1704 wrote:


So that blows my theory out of the water then.
I hadn't noticed my pedal bite getting closer to the carpet with resulting gnashing of gears.  From the forum I learnt the missing return spring was essential.
After fitting one I pushed the pedal to the floor and let it fly back unrestrained, after repeating this a few times the pedal bite returned to where it should have been with clear gear changes. Guess I was lucky.

8)



I'll check again, hey it may be there but may be knackered :)

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Here is an image of the master cylinder.
To get a full charge of fluid to the slave cylinder it is essential the piston in the cylinder is returned to it's resting position.
If the internal return spring has broken or weakened or the linkage return spring is missing, the poor little spring inside the cylinder will struggle to overcome the effort of trying to return the heavy pedal and the piston, and will not return to it's resting position.
So with the rubber boot removed there should be hardly any free in and out movement along the forked push rod to where it makes contact with the piston.  If there is a lot, then the piston is stuck in the cylinder.
HTH

8)

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