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Re: freaky clutch...I don't understand...

To: british-cars@autox.team.net, wzehring@cmb.biosci.WAYNE.EDU
Subject: Re: freaky clutch...I don't understand...
From: tooze@vinny.cecer.army.mil (Marcus Tooze)
Date: Thu, 14 Jul 94 08:51:28 CDT
> Marcus writes:
> 
> >>I'll attempt some ascii....
> >>
> >>My slave cyl. as it sits in the car right now...
> >>    
> >>            bleeder
> >>              _____   __________________________
> >>             |____|  |______________________ ,-,|
> >>             |\  \  \  \  \   | \_____/     | | |
> >>-------------| \  \  \  \  \  | piston+    / _|_________________
> >>pipe in->       \  \spring  \ |rubber cup  ||_______rod to arm__  
> >>-------------|   \  \  \  \  \|  ______    \  | |
> >>             |____\__\__\__\__\_/______\____|,|,|
> >>         |__________________________________|
> >>                                          ^ 
> >>                                              |
> >>                                            circlip
> >>                                    i.e, the piston is AGAINST
> >>                                    the circlip, pushed there
> >>                                    by the spring!
> >>
> 
> And I'll speculate:
> Marcus:  Isn't there some leftwards preasure (wrt your nice drawing) on the 
> piston from the rod?  That is: the spring pushes on the piston from one 
> direction and the rod pushes on the pin from the other direction and when 
> you depress the clutch pedal, the spring side preasure increase 
> (hydarulically) and the rod moves to disengage the clutch.  So, in the 
> absence of the engine (i.e. in the absence of this leftward preasure by the 
> rod) the pedal will feel the resistance of the piston meeting the end flange 
> of the slave wall.
> 
> Yes/no?  This is my speculation, not based on a detailed knowledge of the 
> slave.  

I have to say no, there is no leftwards pressure from the rod. This is saying
that the release bearing is ALWAYS in contact with the clutch, thus providing
the pressure. This is impossible, as the bearing would wear too quickly.

Marcus


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