Narrowed the clutch lever problem down...

Navajo350 · Aug 20, 2016

I just put a new pulley bushing in, my clutch lever still bounces. I just installed a whole "new" pulley assembly that I received from a tractor place, still bounces.

When looking at the flywheel, I think it's going in and out. It's hard to reference it while trying to stand still. I have a dial indicator and it has .010 endplay still. But, I'm not too crazy about checking it while running.

So my crank is moving laterally back and forth with the clutch engaged. I'm not a certified mechanic, can anyone explain what is suppose to happen with the endplay back and forth while running? Can anyone pinpoint this problem now that I narrowed it down and it's not the clutch?

Thanks for the help and patience,
Robert

Bob · Aug 20, 2016

If the flywheel appears to be moving in and out while running, yet endplay (stationary) is only .010" there must be something amiss in the area that controls endplay, a washer may be damaged, broken, wallowed out and "walking" as the crank turns, or something of that nature.

You are going to have to take a close look at those parts in the LH bearing area.

Navajo350 · Aug 20, 2016

So the flywheel is not suppose to move laterally when the clutch is engaged?

Bob · Aug 20, 2016

Not over .005" or whatever the exact factory "spec" is for endplay.

BushogPapa · Aug 20, 2016

Which tractor is this on..??
Nearly all 2-cylinder JD's have only the linkage connected from the clutch handle to the Clutch and when engaged, NO force would be applied to the linkage..

When the Clutch is engaged ( Over-center), it is locked to the crankshaft and may drift with the crankshaft but cannot go anywhere else..regardless of Crankshaft end-play..

Could it be that the Brass "Fork" is worn excessively, allowing the linkage to flop around..??

Is the Clutch linkage generally loose and sloppy..? the clutch handle should be mostly vertical when the clutch is fully engaged..

Bob · Aug 20, 2016

"When the Clutch is engaged ( Over-center), it is locked to the crankshaft and may drift with the crankshaft but cannot go anywhere else..regardless of Crankshaft end-play.."

NOT sure what you mean by the last line of that, as the operating sleeve WILL move left and right with crankshaft endplay and WILL move the clutch lever WITH it, if the movement is excessive.

And IF he's actually able to see the flywheel move, it's moving too much, IMHO.

Navajo350 · Aug 20, 2016

(quoted from post at 16:34:09 08/20/16)
Which tractor is this on..??
Nearly all 2-cylinder JD's have only the linkage connected from the clutch handle to the Clutch and when engaged, NO force would be applied to the linkage..

When the Clutch is engaged ( Over-center), it is locked to the crankshaft and may drift with the crankshaft but cannot go anywhere else..regardless of Crankshaft end-play..

Could it be that the Brass "Fork" is worn excessively, allowing the linkage to flop around..??

Is the Clutch linkage generally loose and sloppy..? the clutch handle should be mostly vertical when the clutch is fully engaged..

I received an extra fork assembly and took measurements between my and the extra and the fork assembly is the same.

Again, I think it's more of the flywheel or the shims and bearings, because I narrowed out the pulley and assembly if you read above.

machineryman · Aug 21, 2016

Navajo, the very, very first thing you do before working on the right side/pulley side is to make sure you flywheel is tight so that you don't get movement other than clearance movement about .10. I've always tightened the flywheel then bump it a little to allow it to freely move. This is a feel adjustment without all the measurement and produces the same results. You don't want it extremely tight as resistance will destroy the thrust washer and if you have pulling the flywheel up too much you may have a missing thrust washer. After you get this right then you install or adjust the clearance on the right side. The drive plate splines may be worn and if so it might go in too deep and lock up the clutch. Check this. After that the pulley is free spinning and the sleeve will move back and forth locking onto the drive when used. It's all pretty simple, a setup used almost a century on all type applications.

BushogPapa · Aug 21, 2016

Agreed that any visual movement would be too much..

Once the Clutch is locked ( over-center), there is NO movement relative to the crankshaft..the clutch will be Locked in place..at that point I think the only thing left for movement is the Fork..and that could give induced clutch lever movement IF the crankshaft end-play is excessive..

Navajo350 · Aug 21, 2016

(quoted from post at 15:13:23 08/21/16)
Agreed that any visual movement would be too much..

Once the Clutch is locked ( over-center), there is NO movement relative to the crankshaft..the clutch will be Locked in place..at that point I think the only thing left for movement is the Fork..and that could give induced clutch lever movement IF the crankshaft end-play is excessive..

I think after messing with it this weekend and checking the thrust washer and such behind the plate and flywheel, and figuring out it's not the pulley, it has to be the end play.

I don't know why, but I'm always coming up short, or in this case too much. I'm having a difficult time tightening the 2 flywheel nuts while kepping/getting .005 to .010. Even with putting a bottle jack against the foundation where the tractor is parked to put a little pressure on the crank from the pulley side. I push and/or hammer, with nuts loose and/or snug and just not getting anywhere.

Narrowed the clutch lever problem down...

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