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-   -   Clutch problem (http://www.clubcobra.com/forums/arizona-cobras/122023-clutch-problem.html)

DrDuc 09-01-2013 01:28 PM
Clutch problem
 
My clutch is doing strange things. Most of the time it's fine with take up mid-travel, but occasionally it engages just off the floor. I've had Gordon Levy look at it and it behaves for him. Any good ideas on the problem and the fix?
Bruce

Tom Cimino 09-01-2013 01:57 PM
I had a problem like that once. Turns out the pivot bolt for the clutch pedal was a little too tight and wouldn't allow the pedal to move freely. I loosened the nut a bit and the problem went away. The nut was a nylock nut.

Danr55 09-01-2013 03:08 PM
Is it mechanical or hydraulic?

DrDuc 09-02-2013 12:12 AM
Hydraulic

Gaz64 09-02-2013 01:22 AM
Master cylinder internally bypassing.

When it engages early, does it then have a lot of pedal freeplay at the top?

Danr55 09-02-2013 03:51 AM
Does it usually engage.early when you start out and its cold or is it truly random?

DrDuc 09-02-2013 12:09 PM
It is truly random and the pedal feels the same. No free play feel. It just engages at the very bottom. Some times it feels like the clutch isn't going to work at all and I won't be able to get the gears engaged. Then it engages half way up as usual and continues to work fine for 10-20 shifts.

Danr55 09-02-2013 04:14 PM
I would look first at the clutch cylinder. Sounds like it has worn a soft spot in the middle and needs to be replaced. THat would be doubly true if it happens when you sit for a minute holding the clutch down. The fluid leaks around the piston.

DrDuc 09-02-2013 05:12 PM
Thanks for the input. I appreciate it.
Bruce

Bob Broberg SPF667 460BB 09-02-2013 05:27 PM
DrDuc, do you have a slave cylinder? Sounds like when mine died from seal leak. Just like what Dan said. Cheap replacement.

AZ Bob

James Stern 09-02-2013 05:43 PM
Check the cable.

Gaz64 09-03-2013 02:15 AM
Quote:
Originally Posted by Danr55 (Post 1260491)
I would look first at the clutch cylinder. Sounds like it has worn a soft spot in the middle and needs to be replaced. THat would be doubly true if it happens when you sit for a minute holding the clutch down. The fluid leaks around the piston.
Master cylinder?

Quote:
Originally Posted by Bob Broberg SPF667 460BB (Post 1260504)
DrDuc, do you have a slave cylinder? Sounds like when mine died from seal leak. Just like what Dan said. Cheap replacement.

AZ Bob
Of course he has a slave cylinder. He could also have a hydraulic throwout bearing which is not cheap, gearbox out job.

Quote:
Originally Posted by James Stern (Post 1260505)
Check the cable.
What cable?, It's hydraulic.

DrDuc 09-03-2013 07:46 PM
Well there are no leaks, the system has been flushed to make sure there is no air in the lines, so we'll check the throw out bearing next. Looks like maybe I'll through in a new clutch while it's all apart.

DrDuc 09-03-2013 07:48 PM
Or throw in a new clutch, would be more accurate.

Danr55 09-04-2013 07:09 AM
If the clutch cylinder is worn, it will only be at one spot. Try pushing the clutch all the way to the floor and see if it works. It's a lot cheaper to replace a clutch cylinder than a complete clutch. That is especially true since, if it is the clutch cylinder, you'll have to replace it anyway.

Dirty Harry 09-04-2013 02:36 PM
Is the clutch fork staying positioned on the pivot ball correctly? Mine was worn and the spring steel retainer was sprung and the fork could move around, changing the relationship between the pivot ball and the socket on the fork. I replaced both the pivot and fork and it made a nice difference.


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