[DeTomaso] Clutch master swap out

Larry - Ohio Time Corp larry at ohiotimecorp.com
Fri Apr 12 11:19:11 EDT 2013


Hi Mike,

 

Yes free play is not a good word to use here. But the test is still valid.
Everything you said is true in a good working system. 

 

Lets say that the push rod is to long now. We have the clutch peddle all the
way up on its rest. As you bolt on the MC it is pushing the piston up in the
bore of the MC. This can cause problems if it starts to cover ports or if it
travels too far into the MC. By shimming the MC out (away) from the mounting
box you are allowing the MC piston to come to its normal resting position.
It is acting as if the rod was shorter. 

 

Simple EZ test to do.

 

Larry (is simple) - Cleveland

 

  _____  

From: MikeLDrew at aol.com [mailto:MikeLDrew at aol.com] 
Sent: Thursday, April 11, 2013 8:26 PM
To: larry at ohiotimecorp.com; fisher95020 at gmail.com
Cc: detomaso at poca.com
Subject: Re: [DeTomaso] Clutch master swap out

 


In a message dated 4/11/13 12 59 33, larry at ohiotimecorp.com writes:





By moving the MC out (away) from the mounting box you are making more free
play in the peddle, as it would need to move more (farther) to reach the MC
to push the piston. This would be just like making the rod shorter. This is
just for testing to see what may be going on.



>>>In a Pantera, the pushrod is physically attached to the back of the
master cylinder.  Moving the master forward introduces no free play; all it
does is bring the clutch pedal lower (closer to the floor).

All clutch free play comes from the back of the car (slave cylinder pushrod
length adjustment, lever mounting on the splined shaft etc.)

Mike




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