Pedal stop question

[Bob Harriman]

Looking to set my pedal stop on my 69 since my pedal goes way too far and seems to be stressing my clutch. It is a 912 but should be the same as a 911. Can anyone give me instructions on how to set it up correctly? Also, does anyone have a photo of one. Mine has bent aluminum tabs that look as if there should be a piece of rubber between them and if so mine is missing.

[edmayo]

First, yes there should be a rubber insert in those tabs. There is a specific part for that, or, an old piece of the narrow rocker deco works also.
As to the adjustment you need to understand what the goal is. The clutch pressure plate has a point of maximum release, pushing it further just stresses the linkage and the pressure plate. A good clutch ass'ly will have an 'over center' feel to it (best felt by pushing the pedal by hand) The pedal stop is adjustable so you can depress the pedal to that point and then it (the pedal) can go no further. The normal adjustment is to adjust the free play by adjusting the cable length so that there is about 3/4" to an 1" of free play when starting with the pedal pulled back, then pushing down just until resistance is felt. That is the free play. Now slowly push pedal down (by hand) until you feel the resistance become less. That is the over center point. Adjust the stop until the pedal just goes SLIGHTLY past over center. If NO over center is felt it may be that the clutch disc is worn too thin. The adjustment is correct when with engine warm and idling the clutch is depressed and reverse can be engaged with no grinding. From the pedal stop point the pedal should come up about an inch/inch and a half when you just start to feel the clutch start to engage.

[Bob Harriman]

Thanks ed. I think I'll need the rubber since it probably sits in the tabs higher than the tabs themselves. My clutch has been acting moody lately and I never knew there was an issue created when the pedal was depressed too far. The clutch only has about 12K but could it have been damaged by the pedal stop not performing correctly? I always get a grind in reverse unless I touch second or third gear first. First gear does the same.

[edmayo]

If you make the adjustments as outlined and it still grinds going into gear, then yes, either damage was done or the clutch replacement wasn't done as correctly as it should have been. For example, was the flywheel depth checked and/or corrected, is the throwout arm hitting the trans housing at full deflection?

[Bob Harriman]

First, thanks for all your expertise. Wish I lived in an area where people like you are available for me to "stop by" and ask. I doubt Andial could screw the clutch assembly up since they put in a new one with my rebuild. I never knew that the piece on the floor board was a critical adjustment for the clutch performance. I have put 12K on my clutch but apparently with the pedal stop set up incorrectly. Does that permanently damage the pressure plate requiring a new one or would that be fixable? Could my clutch cable be stressed (stretched) from the pedal traveling too far causing?

[edmayo]

Are you able to get the adjustments I described, and do you have an 'over center' feel when pushing down the pedal? I have no way to know how much you may or may not have done any damage to the pressure plate. As to the cable, usually it will warn you of impending failure by constantly losing adjustment. If in doubt remove and inspect it and look for any strands starting to break and unravel.

[gregbus]

Hi Bob,

Here is an option for a clutch pedal stop. http://www.partsklassik.com/p-404-cl...edal-stop.aspx You're in good hands in regards to the clutch. Ed Mayo has forgotten more than most of us will ever know.

[Bob Harriman]

I did find one at Pelican, thanks. I know I probably shouldn't be asking 912 questions on this forum but my car, of course, is the same except for the power plant and edmayo is always very willing to chime in with great info..

[edmayo]

Thanks for the kind words guys