How do you remove the rear PTO pulley?

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MikeEyre74
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How do you remove the rear PTO pulley?

Postby MikeEyre74 » Mon Aug 26, 2019 8:23 pm

I guess the question is as simple as that? I do not see any set screws and no snap rings. It is this piece here:

https://flic.kr/p/2h64eWL

It seems to me that it should be located about half an inch further backward to keep the belt in alignment in the vertical plane… But I cannot for the life of me see how this thing moves? What secures it?
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Re: How do you remove the rear PTO pulley?

Postby fordyford » Mon Aug 26, 2019 9:33 pm

I just spent a delightful half day getting mine off my 184, just to replace the rear bearing. That also took half a day.

I might could have removed the complete shaft and parts from the PTO clutch but wasn't sure about that.

Another IH poor design :roll: with no groove or notch in the hub for a puller. I cut two pins for the two holes and only bent them and elongated the holes. Any puller attached to the OD looked like it would bend the sheet metal pulley so that was out.

I was able to rotate the rear sheet metal cover, remove the rear bearing bracket and clam shell bearing covers and get a wide angled flat nose punch through in to the pulley hub. Wouldn't budge. Of course the rear cover panel can't be removed to access the rear bearing with the pulley in the way! ANOTHER great design! :roll:
Ended up heating the hub with the O/A torch a couple of times and got the punch to move it 1/8"! Another heat and it slowly came off, for the first time in however long. The splines in the hub and on the shaft were really crusty and took a while to clean up with files and Emory cloth. Used plenty of anti seize compound going back on.

Good luck! You may need to refill that glass! :beer:
Some of my ancestors mighta hanged by their necks, but none of them ever hanged by their tails.

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MikeEyre74
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Re: How do you remove the rear PTO pulley?

Postby MikeEyre74 » Tue Aug 27, 2019 8:24 am

So... it’s a press fit?? What keeps it from walking around on that shaft after you get it cleaned up and reinstalled, then?
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Re: How do you remove the rear PTO pulley?

Postby Puffergas » Tue Aug 27, 2019 12:12 pm

My pulley just slid off like any PTO would however I think I had to remove some kind of pin behind the pulley. It is a good design but old age and rust can work against you.

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MikeEyre74
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Re: How do you remove the rear PTO pulley?

Postby MikeEyre74 » Tue Aug 27, 2019 1:57 pm

I don’t have a pin on mine that I can see. It just seems weird to me that there’s no visible retention system...
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Re: How do you remove the rear PTO pulley?

Postby mozer71 » Tue Aug 27, 2019 3:52 pm

My PTO pulley is the same but wobbley on the splines. Somebody had drilled through the pulley hub and the shaft to place a large cotter pin in it. It will come off very easy. I bought another pulley of the Browning design. It is cast iron with that internal tapered hub. These things grip so tight that one keyway should work fine.

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Re: How do you remove the rear PTO pulley?

Postby seahaul » Wed Aug 28, 2019 9:25 am

There is a hole on the pulley hub for a pin to go through the pto shaft that holds the pulley on the shaft. If you don't see a pin, then rust is probably the only thing holding the pulley.
I sometimes have to remove the pto shaft and clutch, then press the pulley off the shaft with a shop press. I've never found a way to use a gear puller without destroying the pulley.
Charlie

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MikeEyre74
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Re: How do you remove the rear PTO pulley?

Postby MikeEyre74 » Wed Aug 28, 2019 9:38 am

Ok, yes. There is a hole in my pulley.. but must be plugged up because it looks like it “goes nowhere”.. I’ll investigate that further and see what I can find.
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Re: How do you remove the rear PTO pulley?

Postby outdoors4evr » Wed Aug 28, 2019 10:06 am

There should be a hole in the pto shaft and a hole in the pulley. Done right, these line up and you can put a pin in there to keep the pulley in the proper place. Your pulley has ridden back on the shaft and is probably bound up or seized. I pull mine off annually and then coat the PTO shaft in anti-seize.
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Re: How do you remove the rear PTO pulley?

Postby mozer71 » Wed Aug 28, 2019 11:56 pm

Since the pin is hard to find- and i think some agreement on this, you have to know what kind of pin is in there. Never go in there with a center punch or small diameter which could spread a roll pin.

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Re: How do you remove the rear PTO pulley?

Postby outdoors4evr » Thu Aug 29, 2019 6:52 am

Speaking of hard to find pins... The hole is just a bit less than 1/4". I keep trying to find something like this, but they are either too big or too small.
Image
Anyone know what size pin should be used? I really hate using a bolt that is double nutted.
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MikeEyre74
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Re: How do you remove the rear PTO pulley?

Postby MikeEyre74 » Thu Aug 29, 2019 7:04 am

My local hardware store has them in 16th increments, so a 3/16 would fit through there with some room to spare… It’s either that or take a 1/4 and turn it down a little on the lathe with a sandpaper wheel I guess?
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Re: How do you remove the rear PTO pulley?

Postby Jim Becker » Thu Aug 29, 2019 10:00 am

The hole is spec'ed at 7/32. A 3/16 pin is the right size.

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Re: How do you remove the rear PTO pulley?

Postby Puffergas » Thu Aug 29, 2019 4:14 pm

I would not use the pin above in the picture on a PTO that spins. All my PTO pulleys have cotter pins in them. The kind you bend over. The above pin is for draw bar attachments that do not rotate. IMHO.

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Re: How do you remove the rear PTO pulley?

Postby mozer71 » Thu Aug 29, 2019 7:05 pm

Exactly right. There is balance and that pin sliding through the hole over and over at 540 rpm. maybe.


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