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Farmall & IHC Tractors Discussion Forum
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Farmall M clutch

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Chadd

03-17-2005 09:39:02




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I am thinking it might be time to tackle changing the clutch friction plate on a 1940 Farmall M. It should have the small diameter clutch that can be dropped out the bottom without splitting it right? Does the belly pump stay in or does it have to come out? Anyone who has done this before have any recommendations? Thanks.




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Richard G.

03-17-2005 17:22:58




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 Re: Farmall M clutch in reply to Chadd, 03-17-2005 09:39:02  
What year or serial number did the larger clutch come out on?
Richard



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Josh H

03-17-2005 16:59:19




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 Re: Farmall M clutch in reply to Chadd, 03-17-2005 09:39:02  
I did the same thing last winter outside. Luckily it was warm for a few days so it wasnt bad. Take out the belly pump (you can get it out alone, but it helps to have two people) and then take the coupler apart. (to get the belly pump out, take the little plate behind it off, and then look up inside to make sure the slotted coupler is pointed straight down, so that when you unbolt the pump it can slide down, instead of getting hung up on the coupler) The shaft coupler bolts on mine were tough to get loose, but doable. Next take the bolts that hold the pressure plate to the clutch out, and try to jiggle the whole mess out of there. I didn't think mine was going to fit, but after a bit it did. I would replace all the clutch parts while you are in there. Parts for an M are pretty reasonable.
Josh

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the tractor vet

03-17-2005 09:52:24




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 Re: Farmall M clutch in reply to Chadd, 03-17-2005 09:39:02  
Well if it is the small one then it can be but since i am lazy and don't like layen on my back i always split and i never just replace just the disc because if it is slippen then the pressure plate has gotten hot and that weakens the springs . When i go in everything gets replaced because i am not going back in for that old bearing that i thought was so so is now out a month later.



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chadd

03-17-2005 10:25:13




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 Re: Farmall M clutch in reply to the tractor vet, 03-17-2005 09:52:24  
So then do you think that it is easier to just split the tractor? I don't have a concrete area to do it, and my work area is not level. I just figured that in my situation it would be easier to leave it in one piece. Thanks for your help, I'm sure that it will be very valuable when I actually tackle this thing.



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captaink

03-17-2005 12:37:58




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 Re: Farmall M clutch in reply to chadd, 03-17-2005 10:25:13  
My opinion is that if you have good splitting stands, and a good place to do the work the split is a very tempting option. As the tractor vet noted, lying on your back is not fun and if you need to work on the flywheel or rear engine seal, you will need to split anyway. However, if you don’t have a good place/floor to do a split realignment can be a real nightmare. On an M, there is not a lot that needs to be done before the split, so it really doesn’t take a lot of time. I guess it’s a judgment call you need to make.

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the tractor vet

03-17-2005 10:40:03




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 Re: Farmall M clutch in reply to chadd, 03-17-2005 10:25:13  
Well if ya got that problem then i guess you'll have to do it the old way . I have split them on barn floors in sheds with dirt floors and used 4 inch channel under the wheels of the splitting stands and 2x12 oak for the jack stands to set on and anything from a skidsteer to ft loader for the heavy lifting . Sometime a lot of bull work .



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chadd

03-17-2005 11:20:27




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 Re: Farmall M clutch in reply to the tractor vet, 03-17-2005 10:40:03  
Yeah, my workspace is so short that I had to take the muffler off of our W6 just to fit it in under the roof. I am not even sure the the M will fit under there. If not, I might end up doing it outside. Thanks for the info.



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captaink

03-17-2005 09:48:18




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 Re: Farmall M clutch in reply to Chadd, 03-17-2005 09:39:02  
Yup, you should have the small clutch, and yup the belly pump comes out. Suggestions from me are to find a piece of concrete to park it on and a floor jack and another person to help get the belly pump out. Others have posted in previous threads some good ideas on how to get the pump out alone. Once the pump is out, the throw-out shaft needs to come out, the coupler on the drive shaft needs to come apart and the shaft removed. Take out three bolts that hold the pressure plate to the flywheel and put them in the three holes in the spring back plate that look like they don’t do anything. These holes actually end up in a threaded hole in the pressure plate and when screwed in will take the pressure off the clutch. Take out the other three and drop out the pressure plate.

I’d suggest checking the pilot and throw out bearings and consider replacing them. Check out the bolts holding the coupler together and the washers for wear. Check the transmission seals and replace as necessary.

Good luck!

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Andy Martin

03-17-2005 11:28:56




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 Re: Farmall M clutch in reply to captaink, 03-17-2005 09:48:18  
Good description.

I might add that the bolts in the coupling can be a bear to get out, and the first time you try you'll swear the pressure plate will not come out. Clean the interior of the cavity because you have to touch both sides at once to get it wiggled out and back in. If I recall right it seems that the input shaft needs to stay in the pressure plate and clutch plate and they all three come out together. It is a little bit of a Chinese puzzle but much easier and faster than splitting the tractor because of the pieces up top you have to disconnect to split.

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chadd

03-17-2005 12:01:46




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 Re: Farmall M clutch in reply to Andy Martin, 03-17-2005 11:28:56  
Thanks for the additional info. I have never attempted changing the clutch on a Farmall before. I did a W6 once. The main transmission seal went out and filled the clutch housing with 90W gear lube. You want to talk about a mess. When I was disassembling it, I dropped a bolt and it stuck to the side of the housing. When I brought the parts into the dealer, he joked and said that at least the moving parts were well lubricated.I am hoping that this one will go smoothly and that there won't be any huge surprises. I know better, but I can always hope.

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chadd

03-17-2005 10:27:17




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 Re: Farmall M clutch in reply to captaink, 03-17-2005 09:48:18  
Thanks for the info, I am sure that it will save me a lot of headaches when I get down to doing this thing.



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