C1 Clutch adjustment

[David H.]

I'm once again at my witts end, (not a long trip on this project) as to how to get my clutch adjusted properly.
I have followed the instructions in the ST-12 and tried every possible way I can think of to make this work, but with no luck.
I first connect my pedal to zbar with the rod. The rod is 18" long with a slight curve to it in one spot. Looks original to me. Holding the clutch pedal up against the rubber stop, I then connect the clutch fork end of my clutch rod. The rod is 9 1/2" long and is straight.
I then push back on this rod to put the t/o bearing against the clutch.
Holding it in place I then attempt to put the swivel post on the rod into the other end of the zbar.

It isn't even close to the hole. Even by threading the swivel to the end of the threads on the rod it is not close enough to connect it.
I tried lowering the clutch pedal to the floor and that still does not allow me to attach the rod.
I even checked my t/o bearing to make sure I put it in correctly, which I did.

What else is there? I read thru all the posts on this that I could find and nothing is helping here.clutch linkage 001.jpg
How can it possible be this far off?

[Edward B.]

Re: C1 Clutch adjustment

Some questions to help you zero in on the problem: Did it ever work correctly? If so, what was changed? C-1s have an adjustable bracket on the clutch pedal assembly to allow for a short throw - if this feature is employed the clutch rod must be flipped over - what positions are your bracket and clutch rod in? Over the years Corvettes have used many different clutch rods of various lengths - do you have the correct one? With Corvettes, even if you have all the correct parts for your year, initial adjustment can be a bit tricky. If even one part is incorrect it can be darn near impossible. Recheck your parts against the AIM and the pictures in ST-12.

[David H.]

Re: C1 Clutch adjustment

The bracket is in the normal position not the short throw postition. The rod is in the correct position for that.
This arrangement worked when I took it out however one thing has changed.
The car had a 1960 T10 Cast Iron 4 speed in it when I brought it home.
It now has a date correct 1962 Aluminum 4 speed T10 in it.
I did put a new clutch, pressure plate and t/o bearing in it also.
Standard issue for this car from Carolina Clutch.
Manufacturer: LuK Inc
SKU: 105228 Part No: 04-084

[Terry D.]

Re: C1 Clutch adjustment

David
Did you check to see if old and new throw out bearing are the same? They come in different lengths. Is clutch fork on bearing correctly? Tranny should have no effect on situation, is the bellhousing the same one?
Terry

[Jerry K.]

Re: C1 Clutch adjustment

Is your clutch return spring installed correctly and the right one as there are two different parts for 56-57 and 58- 62.
Make sure the hairpin clip that mounts on the frame is pointed perpendicular to the frame.

[Christopher R.]

Re: C1 Clutch adjustment

You have the right clutch set. I used the 04-084 in my '62, and it fit perfectly.

1. Check the instructions carefully re how the throwout bearing goes on the fork. It does not mount the obvious way.

2. I forget now, but can the clutch disk be installed 2 different ways? Can you flip the disk? Check the instructions again.

[David H.]

Re: C1 Clutch adjustment

throw out bearing.jpgHere is what it looks like as far as the install.

[Loren L.]

Re: C1 Clutch adjustment

I'm with Terry D. and the wrong throw-out bearing....get the # off the box and ask the parts man what it's for.

[David H.]

Re: C1 Clutch adjustment

I can check it but it came with the LuK Inc
SKU: 105228 Part No: 04-084

[Jim D.]

Re: C1 Clutch adjustment

I can check it but it came with the LuK Inc
SKU: 105228 Part No: 04-084

I just installed the 04-084 from Carolina Clutch in my 60. Works great. The T/O bearing in your picture above is the correct one. What part of the country do you live in? Maybe someone close can take a look at it for you.

[Dennis C.]

Re: C1 Clutch adjustment

Is the clutch fork inserted all the way?

Looking at your picture, the fingers of the fork don't appear to reach the center of the throw out bearing.

Dennis

[David H.]

Re: C1 Clutch adjustment

I'm in southern Maine.

The clutch fork seems to be in correctly as it is connected to the clutch ball stud.

The T/O bearing measures 1 1/4" front to back.

Are the measurements of my rods correct?

[Richard M.]

Re: C1 Clutch adjustment

David, Here's a stock setup on a '59 I have here. Just took some pictures for you.(in 2 posts)

The long pedal to Zbar rod is 18". Apx 6" from firewall to Zbar. Apx 11" from pedal to firewall inside. Must be apx 1" inside the firewall seal. The bend in the rod points down, i.e. holds water.

Clutch Fork rod is apx 9 1/2", as your is.

Note the Zbar lever where the clutch rod clevis connects below. The angle of mine is pointing forward. Your pic shows yours is straight down. This may be a clue.

Maybe you have the wrong Zbar. ???

Hopefully the pics will help.

Rich

DSCN0105.jpg

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DSCN0108.jpg

[Richard M.]

Re: C1 Clutch adjustment

More pics.....
DSCN0110.jpg

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DSCN0112.jpg

DSCN0113.jpg

[Jerry W.]

Re: C1 Clutch adjustment

Dave..There is another pic of your z-bar setup that you posted in Jan 2011 before you had body on...you might want to revisit that thread