[DeTomaso] This time with LINK Re: Follow up, with photos Re: Clutch woes in Asa's garage

Mon Sep 7 14:39:04 EDT 2009

7 sep 2009 kl. 19.08 skrev Asa Jay Laughton <asajay at asajay.com>:

> To your point about the external spring overcoming the internal...  
> in my
> case it does -not-.  The internal spring is powerful enough to  
> overcome
> the external.

Well, then either the internal spring is too strong, or the external  
spring is too weak.
>
> The lever shaft was not moved on the shaft between photos.  If you  
> will
> not in photo 13, it doesn't matter what my clearance is, the external
> spring is not strong enough to pull the piston in the slave any  
> further
> into the bore and in fact the internal spring is pushing the piston  
> such
> that the throwout is pressing against the fingers of the pressure
> plate.  At this point, the slave had about two inches of travel
> -available- depending on how much the master can push it, but the  
> point
> is, I don't want the throw out riding on the fingers full time.

Did the clutch work properly at this point? If so, either tossing the  
internal spring, or installing a stronger external spring would work.  
This would also be good time to adjust the set screw for a 1/8"  
clearance.

>
> Asa Jay
Thomas
>
> 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
>
>
>
>
> Thomas Tornblom wrote:
>> Unless you moved the arm on the shaft between photos P9060014 and
>> P9060015, I see a problem. The set screw should have a clearance of
>> about 1/8" in P9060015. What is shown is excessive.
>>
>> The internal spring in the slave is designed to take up any slack in
>> the mechanism, and it has to be weaker than the external spring.
>>
>> I think it is easiest to adjust the clutch operation with the  
>> external
>> spring removed. That way you can see that you have proper clearance  
>> at
>> the set screw, and you will have the best pedal feel. If you can't  
>> get
>> things to work properly in this way, there is no way it will work  
>> with
>> the external spring in place. Just make sure you install the external
>> spring afterwards, or you'll be looking at a throwout bearing
>> replacement in a short while.
>>
>> Thomas
>>
>>
>> Asa Jay Laughton skrev:
>>> Photos link, please excuse my fried brain not remembering to link  
>>> the
>>> photos earlier.
>>>
>>> http://www.teampanteraracing.com/index.php?option=com_g2bridge&view=gallery&Itemid=57&g2_itemId=3131
>>>
>>>
>>> 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
>>>
>>>
>>>
>>> Asa Jay Laughton wrote:
>>>> I really do appreciate everyone chiming in to try and help me  
>>>> adjust
>>>> my clutch remotely.  I've done everything that has been suggested,
>>>> but it still will not work.  The last thing I did today was buy a
>>>> Napa UP-255 cylinder kit to compare it to what I have.  The slave
>>>> cylinder I have is definitely NOT stock.  However the bore size is
>>>> the same and the kit part and present part only differ by .001",  
>>>> the
>>>> kit part being .001 larger diameter than the present part.  And it
>>>> fits.
>>>>
>>>> So I assembled the new piston to the slave cylinder.  Then I  
>>>> removed
>>>> the lever arm and moved it one more notch toward the slave.  Now,
>>>> with the set screw backed all the way out, I can freely position  
>>>> the
>>>> lever arm so it is both free of the pressure plate fingers when
>>>> closest to the slave and resting on the fingers when about an 1/8"
>>>> away.  This is as close to the slave as I can possibly get the  
>>>> lever
>>>> arm.
>>>>
>>>> Then I installed the pushrod (adjusted for the shortest length
>>>> possible) and the external return spring.  Without -any- fluid
>>>> pressure and in fact with the bleed screw open, the internal spring
>>>> on the slave pushes the lever arm against the fingers of the
>>>> pressure plate.  The -only- way to get the throw out off the  
>>>> fingers
>>>> is to manually push the piston back into the cylinder... oh but
>>>> wait...... when bottomed out, I still -can't- get the throw out
>>>> bearing off the fingers.  This would tell me the clutch lever arm  
>>>> is
>>>> too close.  Why is there even a spring inside this slave?  It seems
>>>> to be the cause of all my problems, pushing the piston out far
>>>> enough to contact the throwout bearing against the fingers.
>>>>
>>>> Okay, so I didn't take video, maybe I should be that's a much  
>>>> longer
>>>> process.  Here are the photos, with lengthy explanations
>>>> accompanying each.
>>>>
>>>> Does anyone know what the thickness of a stock friction disc  
>>>> should be?
>>>>
>>>> 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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