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Farmall & IHC Tractors Discussion Forum
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H pressure plate

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John London, Tx

04-10-2007 12:52:58




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I put a new clutch disc in and had flywheel turned along with an engine overhaul. I put the engine on the tractor last week and the clutch is not disengaging. Took the engine off again this morning to see what I had messed up. Looks like the pressure plate is so tight against the disc that the fingers on the plate don't retract enough to allow the release bearing to make sufficient contact to retract the pressure plate. I'm about tired of splitting this old machine. Any ideas? A fellow had this same topic in the archives earlier this month. I tried contacting him thru email to see if he found a solution but no luck.

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Owen Aaland

04-10-2007 20:37:15




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 Re: H pressure plate in reply to John London, Tx, 04-10-2007 12:52:58  
Any chance the disk is in backwards? If it is the original stlye it has a grease slinger on the flywheel side.

With everything assembled the levers need to be parallel or slightly out from the flywheel surface. All the levers need to be adjusted to the the same distance from the clutch cover.



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RustyFarmall

04-10-2007 13:15:20




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 Re: H pressure plate in reply to John London, Tx, 04-10-2007 12:52:58  
Did you remove the 3 or 4 bolts from the pressure plate that keep the plate compressed while being shipped?



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John London, Tx

04-10-2007 14:08:12




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 Re: H pressure plate in reply to RustyFarmall, 04-10-2007 13:15:20  
Rusty, I removed the three inner bolts and put them on the outside with the other three that bolt to the face of the flywheel. I have tried the old disc in it and I have tried an older pressure plate. I'm beginning to think the machinist turned more off of the flange than he turned off of the face of the flywheel. Will have to try finding what the measurement from the flywheel face to the flange is to check the available clearance. Thanks for the response-John

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Janicholson

04-10-2007 17:27:49




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 Re: H pressure plate in reply to John London, Tx, 04-10-2007 14:08:12  
The bolts holding the PP to the Flywheel should be about 1/2 of their length into the Flywheel before the PP begins compressing the disk. This amounts to about 1/4" of gap between the FW and PP with them all just barely beginning to tighten up. If they were way farther out than this on the bolt threads, I believe the FW was machined incorrectly. The tractor does not need to be split to change the clutch and PP. Just the fly wheel/ring Gear requires that. (just to make sure you dont split for a clutch only operation) JimN

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