SMTA PTO - Correct police question

Are the ptos from a SMTA and a 300/350/400/450 EXACTLY the same? We are talking to the point of casting codes (that I didn't see) and the PN cast into the thing around the PTO. (the only pn identifier I saw) It looks like a royal pain to take apart an IPTO and I would really like to just stick the 350 PTO into my SMTA. If there are any external differences I will probably take the good guts from the 350 and put them in the SMTA.

The back story. You can skip this because it is not important to the post but it is why I am looking into this.

I am guessing the reactor bands failed since it worked in the past and then died on the dyno. Then the bands were tightened and it will spin until you put a load on it. I know there could be sheared stuff in there, but the oil looks good. It seems to act like a slipping clutch and the reactor bands are all I see that could act like that.

There is a IPTO from one of those tractors for sale locally. For some reason I think he said it was out of a 300 series, but I am not positive. I would like to at least slide it in there and check the SMTA and "new" IPTO for function. How big of a PITA is that 3' long shaft to get lined up without pulling the lid. That part scares me.

I may be uniquely positioned to testify on your question. I own one of the first SMTA's (60177) and one of the last 660's. These two tractors would represent the entire production life of the planetary IPTO.

As far as I can tell, the only difference on the 660 is the long operating lever and linkage, as well as the rear plate for attaching a right angle gear box. That plate was first used on 300 Utilities that couldn't be fitted with the side mounted belt pulley.

Otherwise, I don't think there is any difference but I will look tomorrow and add to this thread if there is.

The easiest way I have found to replace ANY PTO with a long shaft, is to slid a piece of pipe onto the PTO shaft. Then, with a hoist of some sort, or your handy dandy resident gorilla, lift the unit at the housing,and use the pipe to balance and guide the long shaft into the transmission.

Back when my back was younger, and I was dumber, I have done lighter weight ones (H, M, and even a C) by main strength and ignorance. The C, Super C is kind of clumsy and miserable because the offset gears put the input shaft above the output, and the gear case wants to turn over as soon as you let go of the input.

(quoted from post at 06:37:11 03/11/12) The easiest way I have found to replace ANY PTO with a long shaft, is to slid a piece of pipe onto the PTO shaft. Then, with a hoist of some sort, or your handy dandy resident gorilla, lift the unit at the housing,and use the pipe to balance and guide the long shaft into the transmission.

Back when my back was younger, and I was dumber, I have done lighter weight ones (H, M, and even a C) by main strength and ignorance. The C, Super C is kind of clumsy and miserable because the offset gears put the input shaft above the output, and the gear case wants to turn over as soon as you let go of the input.

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Awesome idea! I am thinking maybe the shop crane could act as a pivot so you can just balance it in the middle. Probably a two man job that way, but nobody hurts themselves.

Here are some pictures of the SMTA IPTO.

Back in Sept. I pulled the unit out of the 450lp I bought. I did this while in the process of updating all fluids and changing some seals and generally bringing the tractor into full working condition.

I pulled and installed it myself using nothing more than a floor jack. This one had an aftermarket 3 point so there was no drawbar in the way.

I'm trying to remember how I got it lined up. I think what I did was engage the pto and while it was butting against the driveshaft, turn the output end slightly with a big crescent wrench. I don't remember how I got the "oomph" the push the thing in and get it seated.

The pipe thing for leverage sounds like a good idea and definately easier with two people!

I don't know if the two units are identical. From a manufacturing perspective I would think it would be easier to make one thing that fits several tractors even if it's overbuilt for the smaller one.

What about looking up part numbers on the case IH web site for a 300 and then a 450 and then compare?

(quoted from post at 09:17:40 03/11/12)...What about looking up part numbers on the case IH web site for a 300 and then a 450 and then compare?

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I started doing that after I posted all the pictures and it looks like they are a touch different. Like the R1s turned into R12s etc. Hopefully the 3XX one will look the same and the numbers are just updates??? I can hope. :lol:

Any of you guys take one of these apart? The manual makes it look pretty hard and takes a lot of special tools.

I haven't been into one. I'm relatively new to tractors with IPTO but I'm sure I'll be into one sooner or later.

Are you saying that you have one from a 350 that you own? If so just pull it and try. That will get you going while you get the other one re-done.

I thought putting that thing back in would be a real mother bear but it went back in easier than I expected. I've had more trouble getting one back into a plane M!

The more I think about it, I believe I used a prybar between part of the three point and the unit to get it in once it got to the o-ring.

A local guy has one he will sell pretty reasonable. Those two friction band things are a hundred some dollars each. I'm hoping I can just strip the guts from the replacement and put them in mine.