Re: Clutch Adjusting...

Posted by ScottyHOMEy on March 12, 2009 at 06:39:28 from (64.222.222.178):

In Reply to: Clutch Adjusting... posted by eric skokan on March 11, 2009 at 22:02:49:

It's sounding more like a bent fork all the time. Though it may still be a very worn down graphite type bearing causing too much clearance.

The fork is nothing but a flat-sided wishbone affair, that holds the carrier for your throwout bearing. The wide side of the wishbone is hinged at the top on a dowel-type pin that drives through the torque tube, near the top and toward the rear of the bell. (Just for kicks, you should measure the depth of that pin on both sides of the tractor and make sure it is centered up, i.e. at the same depth on each side -- it just taps back and forth on a tension fit.) The bottom, narrow, end is where the adjustment rod engages to swing the fork forward, pressing the bearing onto the clutch fingers. The carrier and bearing are between the two, in the wide part of the fork.

If the fork is bent, it will usually bow toward the rear of the tractor, which means to get the right freeplay at the center, where the bearing is, that the narrow end where the rod connects is further forward than it should be. By the time you're running out of adjustment room on the rod, you're also pushing the rod forward into spaces it was never meant to go. I once had one so bad that the rod extended forward enough that it was hitting the heads of the adjusting bolts on the clutch fingers as the motor turned. That would make for a very definite bumping that can be felt in the pedal.

You can get an eyeball on the fork. I'd remove the half moon cover on the bottom of the front of the torque tube just to help get some light in there. You can see the left side of it from the round access hole that you'd normall use to get a grease gun in to the bearing. It's awkward, but you should be able to see the right side by looking up and a little to the rear through the hand hole on the bottom.

As for what you're looking for . . . It's a flat sided wishbone, made of flat metal stock, maybe 5/8" or 3/4" wide and about 1/8" thick. If placed on a tabletop, it should lay flat. If it looks to be seriously bowed, sometimes they can be slavaged, but it is generally better to replace them as they generallly have lost their strength and straightening them will only weaken them further. CaseIHNHFord still stocks them.

And while you're looking around, try to eyeball the clearance between the face of your bearing and the clutch fingers. That would be useful information, especially if your fork appears to be reasonably straight. It should be just about 1/2".

And only because we all sometimes overlook the obvious and nobody else has asked, has anyone done any any clutch work on the tractor recently?

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