PTO Gear Removal Question - Farmall A, B, C tractors

RTR · Jul 22, 2020

Im working on a PTO unit out of a Farmall C tractor and I think these are very similar to the Farmall A, B, Super A, 100, 140, 200, and 230 PTO units. How does this large gear come off? I removed the center bolt and thick spacer washer. Ive been pulling on it with this gear puller but it wont budge. Am I missing something?

Janicholson · Jul 22, 2020

It appears that it should come off the way you are doing it. I would add heat to the hub of the gear, no more than 400 degrees to prevent changing the heat treatment.
Cooling the shaft also helps Jim
exploded view

Ken Hansen · Jul 23, 2020

I know it is tempting to use an impact on a puller like that but unless it is a puller specifically designed to be used with impact tools it will destroy the threads on the puller.

If that gear and shaft are the same as on the A and B tractors it should be a straight shaft with a key in it. I'd be looking close to see if the keyway in the gear are lined up with the key in shaft.

There is a chance that the key has failed and shaft turned in the gear causing things to bind up tight. I might try wedging some soft metal like copper or aluminum between the two gears and then try turning the PTO shaft with say a pipe wrench one way or another to see it that gets something to move.

RTR · Jul 23, 2020

(quoted from post at 19:27:42 07/23/20) I know it is tempting to use an impact on a puller like that but unless it is a puller specifically designed to be used with impact tools it will destroy the threads on the puller.

If that gear and shaft are the same as on the A and B tractors it should be a straight shaft with a key in it. I'd be looking close to see if the keyway in the gear are lined up with the key in shaft.

There is a chance that the key has failed and shaft turned in the gear causing things to bind up tight. I might try wedging some soft metal like copper or aluminum between the two gears and then try turning the PTO shaft with say a pipe wrench one way or another to see it that gets something to move.

It was a working unit when removed. Ive got to have that hear for a part. Im sure it just needs heat I wanted to make sure I wasnt missing anything else before proceeding

DaveBN · Jul 23, 2020

Those gears are very difficult to get off and they come off hard the
whole way so clean what you can before you get it to move. Heat and
patience are your only hope. I wouldn't be surprised if you break it
before it moves. I use a spare bolt and drill a pilot in it for my
puller.
Dave

560Dennis · Jul 25, 2020

I tried heat from torch. Yep mine was a beast. Three jaw nearly broached out the gear .
Can you take it to somebody that has a hydraulic press?

RTR · Jul 29, 2020

(quoted from post at 05:57:43 07/26/20) I tried heat from torch. Yep mine was a beast. Three jaw nearly broached out the gear .
Can you take it to somebody that has a hydraulic press?

I put it in my press last night and left pressure on it overnight with some PB Blaster on it. I can't get it to budge

RTR · Jul 29, 2020

(quoted from post at 01:49:28 07/30/20)

(quoted from post at 05:57:43 07/26/20) I tried heat from torch. Yep mine was a beast. Three jaw nearly broached out the gear .
Can you take it to somebody that has a hydraulic press?

Click to expand...

I put it in my press last night and left pressure on it overnight with some PB Blaster on it. I can't get it to budge

Ive put about 4 full pulls on it and it hasnt budged. Soaked in pb blaster overnight. Should I heat it with pressure on it?

PTO Gear Removal Question - Farmall A, B, C tractors

RTR

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Janicholson

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Ken Hansen

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RTR

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DaveBN

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560Dennis

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RTR

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RTR

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