IH 484 clutch shaft wear question

southms · May 21, 2018

Hello folks.

The clutch on my ih 484 got stuck so I split my tractor to get it freed up. When I opened it up I was unable to move the throw out bearing back and forth. It appeared to be all the way back toward the transmission but pedal was still stuck to the floor. I also discovered that the splines on the shaft where clutch sits are worn about 50%. I want to replace that shaft but unclear on how to remove it. The manual says I need to open the top of transmission but I don't see where I can open the top. Maybe bottom....?
Anyways, I am asking for some expert advise. I need to remove this wore out shaft and free up the pedal. How should I proceed with this?

DJ54 · May 21, 2018

From the looks of the exploded view from the Case/IH online parts book, it looks like the whole top cover of the transmission has to come off. https://partstore.caseih.com/us/CIR...1d993b35&sl=EN&currency=#epc::mr52540ar372658

southms · May 21, 2018

Ouch! That looks difficult

Thank you for reply DJ54

DJ54 said:
From the looks of the exploded view from the Case/IH online parts book, it looks like the whole top cover of the transmission has to come off. Official Case IH Online Parts Store and Case IH Catalog for Best Parts Search and Best Parts Look Up. Case IH Parts for Case IH Tractors, Case IH Combines, Case IH Tractors, Case IH Manuals, Case IH Parts

DLTTrekkers · May 22, 2018

Looks to my that its frozen with rust on one pic and oily on another pic .
Remove rollpins going thru that shaft....remove bearingcarrier then clutchshaft.
To replace splineshaft ...loosen 3 bolts and wiggle shaft to temove releasebearingcarrier ....then wiggle splineshaft and pull out.
Remember to replace all seals.
There is a spesial tool to adj the pressureplate fingerhights

DLTTrekkers · May 22, 2018

The topcover is to reach the gears in the gearbox and not the releasebearing !

southms · May 22, 2018

DLTTrekkers, Thank you for reply.

I took a picture then sprayed everything with transmission fluid mixed with acetone - that's why it looks oily.
So the three bolts you are referring are the ones I marked with red and roll pins marked with green on the following picture?

DLTTrekkers said:
Looks to my that its frozen with rust on one pic and oily on another pic .
Remove rollpins going thru that shaft....remove bearingcarrier then clutchshaft.
To replace splineshaft ...loosen 3 bolts and wiggle shaft to temove releasebearingcarrier ....then wiggle splineshaft and pull out.
Remember to replace all seals.
There is a spesial tool to adj the pressureplate fingerhights