Play in clutch fork

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rkymtnflyfisher

rkymtnflyfisher

Trout Bum
10 Year
Joined
Aug 29, 2011
Threads
164
Messages
9,461
Location
Montana
I am having some problems after installing my clutch this morning, it looks like there is too much play in the clutch fork between the fingers on the pressure plate and the throwout bearing. When the throwout bearing is close to the fingers the fork is pushed back so far that it contacts the bellhousing. I have been searching for a while and have found nothing definitive, am I missing something?

Details,
3 speed flywheel-just had it turned, to include the step measurement.
New 3 speed clutch disc and pressure plate
4 speed bellhousing
3 speed clutch fork (I am assuming this after hours of mud searching)
Long pivot ball
New 3 speed throwout bearing
3 speed bearing hub
4 speed transmission

I measured 3" from the 3 fingers on the pressure plate to the rear face of the bellhousing.
Clutch disc is in the correct way.

You can see in the pics that the fork has rubbed a groove in 2 spots on the bellhousing.

Is this normal or am I missing out on something???
 
Pics

1447539931608.webp


1447539949184.webp


1447539959432.webp
 
Last one shows the play in between the throwout bearing and the fingers on the pressure plate.
 
I have pretty much the identical set up on my 71, and my clutch fork also contacts the bell housing. I've never looked closely enough to see if it's wearing divots in the bell housing, though. I don't know if it's "normal" but you're not the only one with this problem. I'm interested to hear what others have to say.

:cheers:
 
It just doesn't look right to me, looks like the fork should be a lot further forward when the throwout bearing makes contact. It looks like the travel would be maxed out already as it sits now.
 
Anyone else? Nobody has went out to the garage and peeked under their 40?

Any other experiences with this? I know I'm not the first to run across this problem, I just can't seem to find any resolution. Maybe place a spacer behind the fork pivot ball to close the gap some?
 
Pulled everything to verify the step measurement of the flywheel, measures out at 4 different places around the edge at .620 in.

Time to start reassembly. Again.
 
Don't know if it will help anyone:meh:, or if I am still missing something, but I so far have managed to come up with a solution. After installing the clutch and pressure plate I measured right around 3" from the surface of the fingers to the face of the bellhousing, which is a decent measurement from what I had found during some Mud searching. Once I ruled out any issues with the new clutch I focused on the fork and throwout bearing combo. I started by using a shim to extend the pivot ball, essentially moving the fork closer to the flywheel, .500" was too much, the fork made contact with the outer housing on the pressure plate when it was pulled forward. Some trial and error led me to use a couple washers stacked to a .230" height, that centered the fork in the hole in the bellhousing, pulled forward with the slave cylinder spring it clears the pressure plate, and places the throwout bearing about .125" or so from the fingers.

I used 3 fender washers that just cleared the base of the pivot ball and a longer bolt to bring everything together, I did not really like the idea of using washers due to the pressure that is created when the clutch is pressed in. I figured using fender washers with a larger footprint than the pivot ball I would reduce any chance of the pivot shearing the bolt off. Only time will tell.

Pics coming soon...............
 
Pics.....one shows the fork with the .500 spacer in place, one shows the final position.

1447706968673.webp


1447707017549.webp
 
@Kmehr here was my dilemma I was referring to. I also thought I had more pics with the different pivot balls.
 
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