[DeTomaso] No Pantera in Reno - My Luck Runneth Out

Thu Jun 2 04:20:17 EDT 2011

You do know that the piston on the slave is adjustable and you should be
able to shorten it to get some free play.

Steve

-----Original Message-----
From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
Behalf Of Mike Thomas
Sent: Wednesday, June 01, 2011 11:03 PM
To: 'Pantdino'; jb841 at cox.net; detomaso at realbig.com
Subject: Re: [DeTomaso] No Pantera in Reno - My Luck Runneth Out

OK, didn't replace the clutch, same one that was in there before the ZF came
out for rebuild.  I do have some play at the lever with the slave hooked up,
but only about 1.7 mm.  Not much, but some.  It wouldn't make any difference
to move the lever away from the slave: I disconnected the slave, and didn't
have any more play than with it installed, do changing the angle of the arm
wouldn't increase the play.

Thanks, you sound as though you know more than you give yourself credit for.
Mike

  _____  

From: Pantdino [mailto:pantdino at aol.com] 
Sent: Wednesday, June 01, 2011 8:53 PM
To: mbefthomas at comcast.net; jb841 at cox.net; detomaso at realbig.com
Subject: Re: [DeTomaso] No Pantera in Reno - My Luck Runneth Out

Keep in mind that I know only about 1% as much as most of the guys posting
here about this, but it makes sense to me that a new, thicker clutch plate
would tend to move the lever arm closer to the slave cylinder. If the lever
arm is positioned on the clutch spline such that it is now jammed against
the slave when the slave piston is fully pressed into the bore, you will
have no play.

Is that what is going on?

If so, you need to undo the lever arm from the splined shaft and rotate it
to the next position away from the slave.

My understanding is that as long as you have SOME play, that is, the system
is not preloaded with pressure on the clutch lever at rest, it should be OK.
I think there was some discussion on some past thread that when the clutch /
slave heats up it could decrease the free play, but I don't recall if that
was finally accepted or just a theory

I'm waiting for Mike to tell me, "WRONG-O, buddy!"  :-)

Jim Oddie

-----Original Message-----
From: Mike Thomas <mbefthomas at comcast.net>
To: 'John Buckman' <jb841 at cox.net>; detomaso at realbig.com
Sent: Wed, Jun 1, 2011 7:15 pm
Subject: Re: [DeTomaso] No Pantera in Reno - My Luck Runneth Out

Thanks for taking the time to do that, that's very interesting.  If the

dimensions are as you say, then I may have another problem of which I don't

know.

The clutch does feel to be engaging, but only at the very top of the travel,

much higher than it used to be.  I have no free play at the top of the

pedal, didn't have much before but more than this.  I can only move the

lever arm back about 1.6 mm from the stop.  Even when I completely

disconnect the slave from the lever arm in the bell housing, I don't get any

more free play there than that.  I've been advised that I should get more

like 2-2.5 mm.  Not much granted.  I'm going bleed the clutch again and take

it for another drive.

We'll see.

Thanks all, this is a great group.

Mike  

-----Original Message-----

From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com
<mailto:detomaso-bounces at realbig.com?> ] On

Behalf Of John Buckman

Sent: Wednesday, June 01, 2011 11:13 AM

To: detomaso at realbig.com

Subject: [DeTomaso] No Pantera in Reno - My Luck Runneth Out

Mike,

Let's take a few steps back and look at this.  From you description, it

would appear that the clutch may not be engaging fully.  Do you have any

free play at the slave cyl adjusting bolt?  Is the clutch arm return spring

installed, and is it strong enough to move the clutch arm against the free

play adjusting bolt stop?  If you do not have any free play at the slave cyl

and can't adjust any, then you may have to remove the clutch arm and rotate

it one spline.

I have both a Quella T/O bearing (China) and a National boxed Federal Mogul

1625 bearing (Mexico) in hand.  The total thickness of the 1625 bearing is

approximately 0.070" thicker than the Quella bearing.

That, in itself, should not create a problem.    The center race (the part

that is pressed onto the T/O 

bearing hub carrier) of the 1625 bearing is thinner (narrower) than the

overall thickness of this bearing.

The excess thickness of this 1625 bearing is at the back side of the

bearing, toward the transaxle, NOT towards the pressure plate fingers.  The

actual thickness of the center race is exactly the same (give or take a

thou) as the Quella bearing that I have.  The net of all of this is that the

face of these two bearings, when installed, are in exactly the same place.

John

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