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Re: [Fot] Slave cylinder/master cylinder

To: J Wagner <4msonset@gmail.com>
Subject: Re: [Fot] Slave cylinder/master cylinder
From: Bob Kramer Gmail via Fot <fot@autox.team.net>
Date: Sat, 27 May 2023 18:00:18 -0500
Cc: FOT list <fot@autox.team.net>
Delivered-to: mharc@autox.team.net
Delivered-to: fot@autox.team.net
References: <1D373921-257E-491B-AECD-87DB99717441@gmail.com>
I donâ??t know why the fluid in the clutch master cylinders gets nasty so 
quickly, but it does. I start my CMC bleeding process by sucking out all the 
old fluid from the reservoir, wiping it out and filling with fresh fluid. I 
make sure to use all the first fill in the bleeding process so I know all the 
older fluid has passed out of the slave cylinder. 

Sent from my iPhone

> On May 27, 2023, at 1:46 PM, J Wagner via Fot <fot@autox.team.net> wrote:
> 
> 
> 
> Yes, assuming the seals are sound, as suggested, simple bleeding could be the 
> fix.  Water/Air in the system, expanding with heat,  could be taking up some 
> of the pressure required to release the clutch.  (Think brake fade.)
> 
> And how old are the seals in the cylinders?  Maybe the general thermal 
> expansion in the cylinders and/or heated fluid and rubber, is just enough to 
> cause some failure of aging seals?
> 
> While itâ??s messy, and itâ??s been a while for my 4A, after an initial bleed 
> at the slave to just get the system filled with fresh fluid, I used to bleed 
> the master before a final bleed of the slave, by loosening the line ahead of 
> the slave (with the slave nipple closed) as if it were a bleeding nipple.  
> (loosen, push, hold, tighten, repeatâ?¦ clean up fluid as itâ??s a blind 
> bleed into a rag)  Then do a final bleed at the slave nipple.  That always 
> seemed to make it all go faster, relatively effortless.   (I always thought 
> to make some sort of custom bleed screw between the master and slave, but 
> never did.)  
> 
> Between owning British cars, doing my own plumbing for decades, and working 
> water gag special fx in the film buiz, I feel like I should get an honorary 
> PhD in general hydraulics, though, I am quite aware, I still only know .002% 
> about them.  Ok, even less.  
> 
> â??Justin 
> 
> 
> 
> 
> 
> 
> 
> 
> 
>> On May 27, 2023, at 9:36 AM, Philip Gott via Fot <fot@autox.team.net> wrote:
>> 
>> Have you tried bleeding it?
>> 
>> Sent from my iPhone
>> 
>>>> On May 27, 2023, at 11:16 AM, McKearn McKearn via Fot <fot@autox.team.net> 
>>>> wrote:
>>> 
>>> 
>>> Hi all.
>>> Got the GT6 out a few days ago and remembered that I was going to fix the 
>>> clutch problem I had last fall before I stored it away   but did'nt ..
>>> So long story short, I don't know if it's the slave cyl or master cylinder 
>>> but it works fine at first few shifts but as you drive it you get less and 
>>> less clutch movement.
>>> Seems like if you let it set a while it will work  again..
>>> Any ideas?
>>> _______________________________________________
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>> 
>> _______________________________________________
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>> 
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> 
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