Removing Transmission F-40

steelheadjed

New User
I am not the mechanic, but I am helping a friend remove the transmission seals by the shifting fork on my F-40 which was leaking hydro into the bell housing. We have freed the shifting forks and have the tractor split three ways. Is the snap ring in the bottom of the transmission housing what needs to be freed up to let the shafts free for removal? I know these aren t the right terms. Does anyone have a manual for this tractor? We have been working from a 100 series manual and I am pretty sure we are missing some steps.
 
Good morning...

Is the Transmission a 6 seed.?

Multiplier or NO Multi power..?

Is this picture the same as your Transmission.?

There are more than ONE style/Model of the MF 6 speed
NOTE...The bottom PTO DRIVE shaft /Quill has to be removed AFT on some MF 6 speeds and on other Models of the MF 6 speed the bottom PTO DRIVE shaft /Quill has to be removed FWDs to allow the PTO drinve GEAR to DROP DOWN and allow the INPUT drive assemble to be removed.

Bob..
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Quote:
....... but I am helping a friend remove the transmission seals by the shifting fork on my F-40 which was leaking hydro into the bell housing.....

......transmission seals by the shifting fork.........?

If your transmission is a 6 speed with NO Multipower...Dual clutch, I'm only aware of OIL leaking from the Transmission past the INPUT DRIVE shafts to the Transmission..

To remove the INPUT drive assembly (leaking oil seals) to the Transmission, the Shaft that transmits power to the PTO drive must be moved either AFT or Forward to allow the GEAR that transmits power from the Transmission Input shaft assembly to drop down.
Some models of the 6 speed have a PTO drive shaft that must be moved FORWARD. Other models have a PTO drive shaft that must be moved AFT.


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I am trying to do the same job on a 1960 MF35 which should be the same as your tractor. I am at the point of moving the lower shaft to let the PTO drive gear drop down so the upper input shaft unit can be removed. I have NOT figured out how to release the lower shaft. The manuals seem to skip over some important details and I haven't gotten a straight answer here. If I figure this out, I will let you know.
 
Good day Bob N.Y.
Quote:
I am trying to do the same job on a 1960 MF35 which should be the same as your tractor. I am at the point of moving the lower shaft to let the PTO drive gear drop down so the upper input shaft unit can be removed. I have NOT figured out how to release the lower shaft. The manuals seem to skip over some important details and I haven't gotten a straight answer here...

Bob..When you view the pictures....does your Transmission have a large forward end PTO dive shaft..or the smaller
forward end PTO dive shaft???


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The smooth front portion of the PTO drive shaft measures 1 9/16 inch diameter. The splined portion that the gear is on is larger and appears to be the same size as the splines on the counter shaft. I just discovered an internal snap ring in front of the PTO gear. Is that what is hanging me up?
 
(quoted from post at 16:41:03 01/18/23) The smooth front portion of the PTO drive shaft measures 1 9/16 inch diameter. The splined portion that the gear is on is larger and appears to be the same size as the splines on the counter shaft. I just discovered an internal snap ring in front of the PTO gear. Is that what is hanging me up?

Hey this is the same spot we are in. We don t have either shaft free and are having fun trying to get to that internal snap ring. Bob, what type of tractor are you looking in, aF-40 like ours?
 
Quote:
....I just discovered an internal snap ring in front of the PTO gear. Is that what is hanging me up?

Looks like you should remove as per pics/write up
Group ll -Section B-Part 1
Page 4 & 5
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(quoted from post at 06:19:06 01/22/23) Have you made any progress? I haven't.
Yes! Thanks to everyone for posting. The lower pto gear is what you need to free before pulling the input shaft. We didn t realize that from the forward side of the main pto shaft that there was a bearing that could be pressed off. This is after you remove the round plate, washer and heavy snap ring. I believe my friend used to small pry bars to slide the bearing out forward. Then he freed another miserable smaller snap ring. Then the shaft will pull our forward and will drop the pto gear a small amount. I know I am not using all the correct terms here, but let me know if you are still stuck.
 
Good day steelheadjed
Great to hear you have made headway.....
If anyone cannot follow your means of success.....Hmmm...
Bob..
 
I will not be removing my transmission, but I will be replacing the input and PTO shaft seals while tractor is split. My question is can this be performed without accessing the inside of the transmission. Service manuals and videos I have read and looked at have the transmission disassembled. I have also seen where some were not, but the tractor models were different.

Massey Ferguson 35 Diesel Deluxe
AD3.152
Multi-power: NO
Dual Clutch
6 Speed
SN220362 (1961)

I obtained a more detailed service manual and what concerns me are the steps where the the PTO drive shaft goes back in. It mentions placing a block of wood behind the PTO drive gear to bring it as forward as possible.


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Original thread brought over here per recommendation.
https://forums.yesterdaystractors.com/viewtopic.php?p=10881561&highlight=input+shaft#10881561



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This post was edited by Axtell on 02/12/2023 at 01:37 pm.
 
Project still ongoing. Seals have been replaced and input shaft bolted in. Trying to get the PTO shaft in far enough to install the snap ring into the PTO drive gear. I have the gear all the way forward as far as it can be but I need to get the shaft to go about a half inch - inch further in to expose the grooves in the gear for the snap ring. Evidently there s a lineup problem with the shaft, and whatever it slides into on the other side, any advice would be most appreciated. Thanks.
 
Got it! With the tractor split the PTO spins freely in engine as well as neutral select. I moved the lever to ground speed, put pressure on the shaft with the help of a bolt and slightly rotated it until it meshed.

Thanks again


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