[Shop-talk] Weird clutch petal

Sat Oct 12 16:30:17 MDT 2019

Pat thank,  but having inspected the master it appears to be such a poorly made copy of a Girling I see nothing but trouble in the future.the piston does not slide smoothly in the bore leading me to think it is hanging up. Same with the reservoir cut off .
Again thanks.

Bob Nogueira 

> On Oct 11, 2019, at 11:15 PM, Pat Horne <patintexas at icloud.com> wrote:
> 
> You should be able to find a set of seals to try. Lots cheaper than a replacement master. 
> 
> In the past I found this kind of leak by having someone watching the fluid surface in the reservoir while I pressed the pedal down. On my master there was a rise of the fluid where the jet of fluid came out of the reservoir to cylinder hole, causing a “lump” in the fluid surface, indicating a bad seal. 
> 
> Peace,
> Pat
> 
> Pat Horne 
> We support Habitat for Humanity
> 
> 
>>> On Oct 11, 2019, at 10:46 PM, Robert Nogueirao via Shop-talk <shop-talk at autox.team.net> wrote:
>>> 
>> Okay bleed the lines no solution, chance of air in the lines is remote, the slave is higher than the master, the run between them is only a foot or so and the line turns down for only a couple of inches between them. Additionally the bleederis at the highest point of the slave.  
>> The lines are new as is the slave and master.   
>> I did disassemble the master to check it out and it appears to be a Girling knockoff. The piston and reservoir shut off valve feel cheaply made. I’m thinking that the reservoir shutoff may be leaking a bit until pressure is built up thus forcing fluid into the reservoir rather than to the slave.  Only way to check is order a new Girling master from Pegasus, basically a $125 gamble.
>> Right now Donald and Pat are in the problem solving playoffs.   
>> Will advise if the gamble pays off
>> Thanks for the suggestions. 
>> 
>> Bob Nogueira 
>> 
>> B
>> 
>>> On Oct 9, 2019, at 7:18 PM, Donald H Locker via Shop-talk <shop-talk at autox.team.net> wrote:
>>> 
>> It would sound like air to me, too, but that it works "90% of the time" which would indicate to me that one of the seals is not sealing properly.
>> 
>> It's been a while, but I had a similar experience, and discovered that if I hit the pedal quick and hard, the clutch action was good; if not fast or hard enough, the pedal was soft.
>> 
>> My guess is that a seal is old and not always flaring out to the MC bore when the pedal is pressed.
>> 
>> Donald.
>> --
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>>> On 2019-10-09 8:03 p.m., PJ McGarvey via Shop-talk wrote:
>>> Sounds indicative of air in the lines, since the first pump is weak/soft, but as you pump it a few more times you get more pressure. Check for loose connections and then bleed a whole bottle of fluid.
>>> PJ
>>> ------------------------------------------------------------------------
>>> *From:* Shop-talk <shop-talk-bounces at autox.team.net> on behalf of Tom Shirley Sr. via Shop-talk <shop-talk at autox.team.net>
>>> *Sent:* Wednesday, October 9, 2019 7:46 PM
>>> *Cc:* Shop-talk <shop-talk at autox.team.net>
>>> *Subject:* Re: [Shop-talk] Weird clutch petal
>>> Air in the lines?
>>> On Wed, Oct 9, 2019, 6:38 PM Robert Nogueirao via Shop-talk <shop-talk at autox.team.net <mailto: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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