Farmall M belly pump removal

Karl Z · Oct 14, 2011

We picked up a '49 Farmall M last week and I'd like to pull the belly pump. I don't have manuals yet and I'm curious how difficult this will be. Any tips or cautions I need to know about?

Bob M · Oct 14, 2011

Karl -

Belly pump removal is straightforward. Only caution are the pump is HEAVY (also it is top-heavy). DON'T let it get away from you when lowering it from the tractor!

If you are working alone replace each of the (4) mounting bolts with sections of threaded rod + nuts. Then lower the pump gradually by gradually running the nuts down the rods. (It's not fast but it's easy and safe!)

Anonymous-0 · Oct 15, 2011

I removed the pump out of my MD (twice) with the threaded rod method. As Bob M states, it's slow but safe. Be sure the drive coupling is in a vertical positon so the pump will slide out of it on the way down. I lowered mine onto a rolling cart for easy removal from under the tractor.

Charlie M · Oct 15, 2011

I've lowered mine using a floor jack. It does take a second person to steady it while somebody else works the jack.

sflem849 · Oct 15, 2011

(quoted from post at 05:26:04 10/15/11) I've lowered mine using a floor jack. It does take a second person to steady it while somebody else works the jack.

That's what we do. I have cut the heads off long bolts to act as guides because it likes to tip right before you get the coupling in.

Taking it apart is a little tricky, but not bad. Why are you taking it out? Weight? Drag? If drag just put some long bolts in, drop the coupler, and bolt it back in. No need to drop the entire thing.

Karl Z · Oct 15, 2011

Thanks for all the replies. I now have a few more questions.

How can I make sure the drive coupling is in the vertical position?

Do I have to remove the elbows that stick out of the sides of the tractor?

How many mount bolts are there and are they all at the top?

Anonymous-0 · Oct 15, 2011

Take off the small cover plate just behind the pump. You will be able to see the drive coupling. The front slot where it fits into the pump should be straight up and down. Crank the motor over or bump the starter until it's in this position. Yes, all pipes have to be removed. The pump is held in place with 4 cap screws that go up thru the frame into the pump. Take one out and replace it with three eights threaded rod with a nut on it. Do the same with the other three. You're now ready to drop the pump by turning each nut a little at a time. This takes a while, but if you get tired of doing it, you can walk away and the pump will just hang there with no fear of falling. Of course, if you have a helper, you can use a floor jack which is a lot faster.

Karl Z · Oct 15, 2011

Ah..that makes sense. The reason for removal is that the motor is stuck. The tractor has spent the last 32 years sitting in a barn. A friend of mine is familiar with the tractor and told me that he used to help the PO pull it around the yard every couple years...the last time was about 5 years ago.

We drained the crankcase which was water free. I checked the valve train which also looks good. I've put a quart of MMO in the cylinders and I've gotten a little movement in the flywheel. I was looking to remove the pump to make sure it wasn't adding to the problem.

If you guys think I'm barking up the wrong tree, let me know.

sflem849 · Oct 15, 2011

(quoted from post at 16:25:07 10/15/11) Ah..that makes sense. The reason for removal is that the motor is stuck. The tractor has spent the last 32 years sitting in a barn. A friend of mine is familiar with the tractor and told me that he used to help the PO pull it around the yard every couple years...the last time was about 5 years ago.

We drained the crankcase which was water free. I checked the valve train which also looks good. I've put a quart of MMO in the cylinders and I've gotten a little movement in the flywheel. I was looking to remove the pump to make sure it wasn't adding to the problem.

If you guys think I'm barking up the wrong tree, let me know.

Just lower it down and drop the cross. It is A LOT easier especially when it comes to putting it all back together.

Like I said, just get the longest 3/8" bolts you have and thread them in as guides. The all thread works better, but it is slow and expensive.

kevinj54 · Oct 16, 2011

(reply to post at 20:25:07 10/15/11)

Find out if the clutch is loose. If so just block it down.

Dale_MN · Oct 20, 2011

Don"t know if you"ve pulled your"s yet, I just took mine out and took a pic of it hanging by the bolts.

Farmall M belly pump removal

Karl Z

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Bob M

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Anonymous-0

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Charlie M

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sflem849

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Karl Z

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Anonymous-0

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Karl Z

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sflem849

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kevinj54

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Dale_MN

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