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Guest Message by DevFuse
 

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hydraulic clutch piston vibrating on clutch fork


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9 replies to this topic

#1 grossgary

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Posted 17 July 2007 - 11:07 AM

legacy with hydraulic clutch mechanism. the engine vibrates some and the piston of the hydraulic cluch mechanism rubs against the clutch fork, making a light noise occassionally. is it supposed to be tighter than that? everything runs and works perfectly otherwise. doesn't appear to be any adjustment to it...but i bet 'im wrong?

#2 Legacy777

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Posted 17 July 2007 - 11:42 AM

There should be a spring that holds the clutch fork against the piston. Also, you can put a little bit of grease in the indent where the piston goes. That will help quiet the noise.

#3 grossgary

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Posted 19 July 2007 - 09:02 AM

ah ha, a spring? i definitely don't have a spring on it, nor do i remember every having one. thanks J.

#4 grossgary

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Posted 26 July 2007 - 09:37 AM

can anyone post a picture of where/how this spring fits? real easy to see. i have a couple EJ25's and it seems none had this spring. a diagram or picture would help, i don't see any obvious holes or clips for where to put the spring.

#5 hankosolder2

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Posted 26 July 2007 - 10:34 PM

can anyone post a picture of where/how this spring fits? real easy to see. i have a couple EJ25's and it seems none had this spring. a diagram or picture would help, i don't see any obvious holes or clips for where to put the spring.


No spring on ours either. (98 OBW 2.5) If memory serves, there is a fairly light spring inside the slave cylinder to help "bias" the piston out. Does the clutch fork feel loose? Generally, the self adjusting nature of hydraulic clutches takes up any free play, hence no rattling/vibration.

Nathan

#6 grossgary

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Posted 27 July 2007 - 09:05 AM

okay back to the drawing board...what keeps the clutch fork tight to the hydraulic cylinder? it's not tight to it and will make noise occassionally.

#7 hankosolder2

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Posted 29 July 2007 - 07:54 PM

okay back to the drawing board...what keeps the clutch fork tight to the hydraulic cylinder? it's not tight to it and will make noise occassionally.


Gary,
as I stated before, if memory serves, I think there's a light spring inside the slave cylinder which helps push the piston out. Also, if your master cylinder was screwed up or misadjusted, it could pull a vaccum as the pedal returns to the up position, backing off the slave cylinder slightly. There should be some slight free play in the pedal before it engages the pushrod for the master cylinder.
In the "long shot" category, if you have any strange mechanical issues with the engine or clutch release mechanism (here's a real long shot- bad thrust bearings in the motor, crankshaft shifts forward and back as the engine runs and keeps screwing with the release fork.)

Good luck,
Nathan

#8 Legacy777

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Posted 30 July 2007 - 10:49 AM

Gary,

What year Legacy do you have?

#9 grossgary

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Posted 30 July 2007 - 12:00 PM

1998 Legacy GT Sedan with hydraulic clutch. piston pushes against the fork, i've never worked on a hydraulic clutch before do i don't know all the terms.

#10 Legacy777

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Posted 31 July 2007 - 11:22 AM

Gary,

You have the push style clutch, which is a little different from my setup, but I believe it still should have the spring.

Anybody have a picture they could post up or take? I'll host the picture if need be.




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