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Was coming back from the run yesterday, when my clutch felt like the line had been cut! no resistance on the pedal, and when depressed,the car still was accelerating (no disconnection between engine and trans) I pulled over to check and then the clutch pedal became rock hard. I opened the bonnet and cracked the bleeder valve while my son stepped on the clutch pedal and it depressed, closed the valve and pedal rock hard again. seems like it might be the slave?? any ideas what might have caused this and how to repair?

:
Clutch slaves have been known to go away. It's not a normal occurance but it does happen.

Just to make sure again that it's not the master cylinder, If you open the bleeder valve on the clutch slave, the pedal will push to the floor??

If this happens, then the MC is OK. Next, remove the nut from the slave that adjusts the throw out bearing fork. Put a large crescent wrench on the throw out fork and move it towards the engine. If the arm works then the problem is the slave. Any dunebuggy shop will have a new slave, usually around $35.00 to $45.00. Remove the old slave, install the new one and bleed out the air.
_________________
Larry Jowdy- 2002 Beck #71
Joined: 09 Dec 2002
Posts: 97
Location: L.A. Ca. U.S.A.

Posted: 11 Apr 2004 09:02 am Post subject:
Larry:
thanx for your prompt reply, I cracked the bleeder valve and the pedal depressed. I then removed the slave and tried the pedal, went 1/4 way down and rock hard the slave rod does not move, then I tried moving the throw out fork and it seems to rotate on the shaft, also seems to have a crack in it (see pic) is the shaft splined? is the arm hard to replace?
Thanx for looking.

Bruce
The hardest part of replacing the arm is dealing with the spring. They don't usually break but who know's.

I hate to be the bearer of bad news but you may also have other problems that caused the crack. The clutch may be screwed up and won't release thus causing undue pressure on the arm and on the slave.

It's hard to diagnose over the computer.
_________________
Larry Jowdy- 2002 Beck #716
Thanx to Larry for his input. anyone else have any suggestions??
HELP!
Original Post

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Was coming back from the run yesterday, when my clutch felt like the line had been cut! no resistance on the pedal, and when depressed,the car still was accelerating (no disconnection between engine and trans) I pulled over to check and then the clutch pedal became rock hard. I opened the bonnet and cracked the bleeder valve while my son stepped on the clutch pedal and it depressed, closed the valve and pedal rock hard again. seems like it might be the slave?? any ideas what might have caused this and how to repair?

:
Clutch slaves have been known to go away. It's not a normal occurance but it does happen.

Just to make sure again that it's not the master cylinder, If you open the bleeder valve on the clutch slave, the pedal will push to the floor??

If this happens, then the MC is OK. Next, remove the nut from the slave that adjusts the throw out bearing fork. Put a large crescent wrench on the throw out fork and move it towards the engine. If the arm works then the problem is the slave. Any dunebuggy shop will have a new slave, usually around $35.00 to $45.00. Remove the old slave, install the new one and bleed out the air.
_________________
Larry Jowdy- 2002 Beck #71
Joined: 09 Dec 2002
Posts: 97
Location: L.A. Ca. U.S.A.

Posted: 11 Apr 2004 09:02 am Post subject:
Larry:
thanx for your prompt reply, I cracked the bleeder valve and the pedal depressed. I then removed the slave and tried the pedal, went 1/4 way down and rock hard the slave rod does not move, then I tried moving the throw out fork and it seems to rotate on the shaft, also seems to have a crack in it (see pic) is the shaft splined? is the arm hard to replace?
Thanx for looking.

Bruce
The hardest part of replacing the arm is dealing with the spring. They don't usually break but who know's.

I hate to be the bearer of bad news but you may also have other problems that caused the crack. The clutch may be screwed up and won't release thus causing undue pressure on the arm and on the slave.

It's hard to diagnose over the computer.
_________________
Larry Jowdy- 2002 Beck #716
Thanx to Larry for his input. anyone else have any suggestions??
HELP!
Bruce - The symptoms you describe are often the results of a long standing but undetected problem with the clutch not completely releasing from the pressure plate. It usually begins with an almost undetectable difference in the way the clutch functions, then is followed by the sudden onset of failure somewhere in the clutch mechanism that is the result of overstressing the system.

I had a similar thing happen with my '66 912 (Although it didn't have a hydralic clutch)...The main seal began leaking oil onto the flywheel and contaminated the clutch surface. At first it was just a little "grab" and I thought it needed adjustment, but before I got to it, the oil permeated the clutch plate which then "cemented" itself to the flywheel...The result was a bent throw-out fork.

If it isn't clearly the slave or master, I'd start at the flywheel and work my way out.
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