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Clutch fork throw


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On 2/28/2021 at 10:09 AM, Sailor Bob said:

I seem to have exactly the same issue

Just to be sure, you showed the picture of the clutch fork hitting the back of the hole in the bellhousing.  Is that the problem?  The 5 pages is about how the problem couldn't be solved by the normal methods, and it could only be solved by lengthening the pivot stud.  But that is very unusual.

You might just need the tall throwout bearing sleeve.  That is the most common solution.  Normal.

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You probably want  - 2122 here.  I think that it's the tallest.  https://www.thezstore.com/page/TZS/PROD/21-2122

Put "collar" in the search box to see more.

https://www.thezstore.com/store/merchant.mvc?

@Terrapin Z might have one and could measure it for you too, probably.  You should get more measurements though.  Distance from the bottom of the pressure plate/clutch cover to the surface that the throwout bearing sits on.  Then you can do the math to see which collar/sleeve you need.

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13 hours ago, Zed Head said:

 

@Terrapin Z might have one and could measure it for you too, probably.  You should get more measurements though.  Distance from the bottom of the pressure plate/clutch cover to the surface that the throwout bearing sits on.  Then you can do the math to see which collar/sleeve you need.

I do have a number of these in various sizes, all used of course. 

I have the same chart as RCV posted ^^ and this one as well. 

Let me know if you need more measurements.

Throw out collar.jpg

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Thanks. Im thinking type b4. I have to take it apart again to measure. Might be the weekend befor i get back to it.

i actually have a complete five speed from a zx in my shed. Im thinking there may be a fork/to bearing in it. Havent been in it in months so the snow is  blocking the door... canada

CA9B96D8-765F-433A-BFFF-1D0EE0010835.jpeg

Edited by Sailor Bob
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2 hours ago, Terrapin Z said:

Let me know if you need more measurements.

If you have an example of each collar on hand, then you should measure the distance from the leading edge of the TO bearing to the top of the ears. It’s the red dimension in my image, but I derived my numbers by counting pixels in the photos. If you can get the actual measurements with calipers and annotate them in a consolidated image, then you will be the only person in the known universe to have done so and you should make that image a sticky. 

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8 hours ago, rcv said:

If you have an example of each collar on hand, then you should measure the distance from the leading edge of the TO bearing to the top of the ears. It’s the red dimension in my image, but I derived my numbers by counting pixels in the photos. If you can get the actual measurements with calipers and annotate them in a consolidated image, then you will be the only person in the known universe to have done so and you should make that image a sticky. 

I'll have to look into that. I haven't really sorted them all out. If I have all they styles I will make that effort. Thanks for the suggestion. 

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  • 2 weeks later...

Simplest solution. Cleaned up the old pressure plate, took out the new pressure plate assembly, reinstalled the old one. Perfect... if im not too hungover tomorrow i may install the engine/tranny.

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16 minutes ago, Sailor Bob said:

Simplest solution

Did you happen to measure any height difference between your old pressure plate and your new one? I had tried the same simple solution, but the old plate had the same issue as the new.  I asked the PO but he didn't remember any clutch issues.  The car hadn't been driven in about 15 years so he wasn't too sure though.

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  • 1 month later...
On 3/3/2021 at 6:27 AM, rcv said:

If you have an example of each collar on hand, then you should measure the distance from the leading edge of the TO bearing to the top of the ears. It’s the red dimension in my image, but I derived my numbers by counting pixels in the photos. If you can get the actual measurements with calipers and annotate them in a consolidated image, then you will be the only person in the known universe to have done so and you should make that image a sticky. 

I finally pulled these out and cleaned them up a bit. Looks like I have all four with TOB's on them. The shortest ones bearing is a little different that the other three. I took measurements overall and to the ear. If anyone can suggest other measurements let me know ant I will update. 

TO Collar Measurments.png

TO Collar to Ear.png

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Nice, those mostly line up with the measurements in my image (repasted below for reference).  The only one I can't really match up is the bottom-right in your image with the 46.84mm ear to TO measurement.  Do you happen to know what vehicles each of these originally came out of? It would be helpful to label them if so.  Also, one more measurement you could take would be from the top of the throwout bearing to the top of the collar.  I'm pretty sure this is a functionally useless measurement, but it's what's provided in all of the other collar images I've seen (e.g. https://www.classiczcars.com/forums/topic/64212-clutch-fork-throw/?do=findComment&comment=602080&_rid=33357) and would help match your measurements to other images.  Thanks for doing the legwork here, I'm sure it will save someone a lot of headache down the road.

 

 

image.png.8352139bf1e1f3feb2bab22f7400d7a0.png

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