[DeTomaso] CNC Clutch, problems bleeding

[asajay at asajay.com]

I looked it up on the parts drawing, so I know what I'm looking for.   
I'm not in the garage right now.  I -do- remember seeing that spring  
on the brake pedal, but not the clutch.  I'll look again tonight.

Asa Jay

Quoting Ed Pike <erpike at ymail.com>:

> Asa:
>
> I have that spring on my pedal and for what it it worth, mine is   
> broken and has been for quite some time and I have not had clutch   
> (or pedal) issues. I haven't been able to figure out why  it is   
> there. It looks like a real bear to get out and probalby put back in.
>
> Ed...
>
>
>
> ________________________________
> From: "asajay at asajay.com" <asajay at asajay.com>
> To: detomaso at realbig.com
> Sent: Tuesday, July 28, 2009 1:36:30 PM
> Subject: Re: [DeTomaso] CNC Clutch, problems bleeding
>
> I don't recall -any- spring on the pedal.  Weird, I'm going to have to 
> look into that.
>
> Thanks for the suggestion on the slave adjustment, that sounds more 
> like the ticket I'm looking for.
>
> Asa Jay
>
> Quoting forestg at att.net:
>
>>
>>
>>   Asa,
>> It sounds like your new clutch disc is thicker than the original 
>> thus moving the release fingers in farther. You could probably 
>> remove the arm from the throwout shaft and move it one spline closer 
>>   to the front. This should allow you to set free travel with the 
>> stop  screw. This might solve the whole problem but if the pedal 
>> still  does not return just get a coil spring at the hardware store 
>> and  drill a small hole in the pedal and hook the spring to the 
>> metal  framing under the dash. The original springs are tough to 
>> change and  will just break again anyway.
>> Good luck,
>> Forest
>>   -------------- Original message from "Tomas Gunnarsson" 
>> <guson at home.se>: --------------
>>
>>
>>> Asa Jay,
>>> You have two issues it seems. The master spring can not be relied 
>>> on to return the pedal. There's a return spring on the pedal, it's 
>>> there for a reason. With the master cylinder out, the pedal must be 
>>>   able to return to the stop on its own. In your case it's obvoius 
>>> that you have some kind of pedal travel issue as you have to pull 
>>> the pedal against the stop to fill the master from the reservoir. 
>>> You also mention pulling the slave out until it almost makes 
>>> contact with the throwout bearing. This is a similar problem, you 
>>> should be at that
>>> point at rest with the slave. You have a slave cylinder adjustment issue.
>>>
>>> Tomas
>>>
>>> ----- Original Message -----
>>> From: "Asa Jay Laughton"
>>> Cc: "Tomas Gunnarsson"
>>> Sent: Tuesday, July 28, 2009 5:01 AM
>>> Subject: Re: [DeTomaso] CNC Clutch, problems bleeding
>>>
>>>
>>> > Bench bleed it, did that already.
>>> > Push it down to make sure the ports are lined up.  Huh?  If anything,
>>> > the rubber cup is covering the ports from the pedal already being
>>> > depressed.  Anyway, it seems to be a combination of problems, I think.
>>> >
>>> > I picked up a vacuum pump brake bleeder kit from Napa.  Hooked it all up
>>> > and got NOWHERE.  Nothing was moving, fluid level the same, and I -know-
>>> > the lines were clear as I blew it all out with compressed air.
>>> >
>>> > So I reach under the dash and pull the pedal about a quarter inch toward
>>> > the back of the car.  Shlluuuuurk, out went the fluid.  Refill the
>>> > reservoir, pump the vacuum again, repeat.  Eventually I got the entire
>>> > line filled.  Now, it -may- still have some air in it, I'm not sure.
>>> > But here is the thing.
>>> >
>>> > At rest, the slave likes to come a long way back.
>>> > At rest, the pedal isn't quite all the way up.
>>> > When pressing in the pedal, I don't get the kind of resistance I expect,
>>> > and not enough pedal travel to release the clutch.
>>> >
>>> > If I pull the pedal all the way up, then go to the slave and pull it out
>>> > so it's just ready to contact the throw-out bearing, I can depress the
>>> > clutch and get some good release action, and see the clearance open up
>>> > at the disc.  So what gives?
>>> >
>>> > The master only springs back from spring pressure inside the master.
>>> > Out of the car, it comes all the way back against the snap ring just
>>> > fine.  In the car?  I'm not so sure.  The slave has this massive spring
>>> > that pulls back the lever, but even the adjusting screw is all the way
>>> > in and still doesn't touch the stop.  There is about a half inch in
>>> > between the stop and the adjusting screw, so I can't get it to "rest"
>>> > farther out because there is nothing to stop it, (at least not yet).
>>> >
>>> > Photos would probably be good, but I've not taken any yet.  I'm at that
>>> > "need the experience of others" point.
>>> >
>>> > Thanks,
>>> > Asa Jay
>>> >
>>> > Asa Jay Laughton, MSgt, USAFR, Retired
>>> >
>>> > & Shelley Marie
>>> > Spokane, WA
>>> >
>>> > 1971 Mach I Mustang  [ASA JAY]
>>> > 1973 Pantera L 5533  [ASASCAT]
>>> >
>>> > ******************************
>>> > http://www.asajay.com
>>> > http://www.teampanteraracing.com
>>> >
>>> >
>>> >
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