[Shop-talk] Weird clutch petal

[Pat Horne]

Bob, I’d put my $$ on the master cylinder being bad. Is it new or rebuilt? Is it possible that the master has been on the shelf for years & the seals are dried/cracked? What kind of fluid did you use? If it is a silicone based fluid there may be some bubbles gettin into the master. 

Peace,
Pat


Pat Horne 
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> On Oct 9, 2019, at 5:26 PM, Robert Nogueirao via Shop-talk <shop-talk at autox.team.net> wrote:
> 


I have a  hydraulic clutch, Girling 5/8” master and a internal slave that fits over the input shaft. Both are new.  Problem is I have a really good feeling petal, no leaks and good operation 90% of the time but occasionally when you depress the clutch to change gears the petal feels soft and will not fully release the clutch. Letting the petal out and again depressing it and the feel and release are again normal. Reservoir shows no lost of fluid.  
Since the slave is mounted on the input shaft and operates directly on the throw out bearing there is no linkage to cause the problem.
Any suggestions as to what could be causing this problem?
Bob Nogueira 
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