JD 40 C steering clutch adjustments

ratskinner · Feb 10, 2016

I have a John Deere 40 C that have replace both clutch packs I have the machine back together and both steering clutches are slipping I have adjusted the throwout bearing has back as far as it will go. I I think that the fingers on the pressure plate need to be adjusted for it looks like it is still touching the throwout bearing a little. What would be the best way to do this or is there something else I am overlooking. And some additional information would be when it was up on the jack stands and the tracks off both sides work perfectly now that the tracks on the ground it does not work

Lavoy · Feb 11, 2016

Did you replace all the parts, or just some? Did you set the fingers on the pressure plate with proper gauge before reinstalling the final?
Lavoy
jdcrawlers.com

ratskinner · Feb 11, 2016

New bearings and I replaced about half the clutch disks.And no I did not set the fingers before I put it back togather.The fingers are just barely touching the throw out bearing so I take it that they are not to be touching at all? Can I adjust them with out taking it all back apart?

pinball · Feb 11, 2016

I would suspect the half you didn't replace is your problem. I have always been told to replace all disks in a dozer clutch pak when rebuilding it.

Jo Bird · Feb 11, 2016

What is the stack height of your steel and fiber disks ??

ratskinner · Feb 12, 2016

even with the clutch housing

Jo Bird · Feb 14, 2016

(quoted from post at 14:20:24 02/12/16) even with the clutch housing

/ we are putting the clutch packs back together in a 40C as we speak. I'm sorry but that does not give me any idea of the stack height. From research, the tolerance for the stack is 1.548" (min) to 1..638 (tall). Disks should be stacked as necessary to make the stack within these limits and steel plates should not be used on either end of the stack, only fiber disk should. And the height of the fingers on the pressure plate needs to be set with a JD-7 set gauge. Before you install the clutch pack back into the machine. I understand they are available but, searching the forum I came across this: Re: John Deere JD-7 Clutch finger height Gauge in reply to JDVan, 02-18-2014 21:24:29
From service manual 2019;shows gauge as being 4 inches tall; 11 3/4 inch wide; 10 3/4 inch between two legs that sit on flywheel. From finger tip to flywheel is 2-21/32 inch . I'm sure you are aware of some of this information, where others may not be. It's always interesting to take on a challenge as this and only time will tell how well the end results are. Good luck.
JO

sms · Feb 17, 2016

The fingers are set to a preloaded height before the final is installed, if you have the gauge mentioned above you should be able to do it by pulling the final out 4-5 inches to have room to work. As said this is a preload not related to bearing contact, that comes after installation of final. If not the right preload there may not be enough spring pressure to keep clutch from slipping. Also is the pressure plate known to be good? The springs can be removed and tested also.

the tractor vet · Feb 17, 2016

Now not being the local J D guru on this subject but have done many crawler clutch pac rebuilds you Never ever try and Cheat , you replace EVERYTHING and it also helps to have the tools for the job BEFORE you jump in with both feet. I have the gauge for the finger hight as it is the same tool used for the 4010-20 main clutch. To solve your problem and do it correctly you get to take it all back apart and start over and get your stack hight set to the BOOK and then get two NEW pressure plates and then set the finger hights to the gauge thenn put it all back together and set your throwout bearing and brake bands , THEN everything will work .Or you can keep messing around and trash what you have done sofar and then do it again. Yea i have made mistakes and had to go back in , nope not fun at all. But you learn . A man told me once it only costs a dollar more to go first class.

JD 40 C steering clutch adjustments

ratskinner

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Lavoy

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ratskinner

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pinball

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Jo Bird

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ratskinner

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Jo Bird

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sms

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the tractor vet

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