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Discussion Starter · #1 ·
I was looking at some of my hydraulic PTOs that are hanging on the wall and I noticed that the tubing was mainly straight on two of them and two others had bends in them, I guess to go under the transaxle. Is this something that changed based upon the year or why are these different and is that what the bends are for (to go under the transaxle)? I never saw the difference in them before.

-Justin
 

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In order to answer your question accurately, it would take a considerable amount of research time in the manuals.

So let's talk about a couple of obvious differences.

When the 200/400 models were released in 1969, the rear PTO valve was not at the rear. Just the lines were. The valve itself was mounted on a metal bracket that bolted to the side of the Kohler engine and steel lines when from that valve to the rear of the tractor.

When Case added 2 inches to the wheelbase of the 400 Series, that called for a different set of lines from the ones used earlier on the 200 Series and short wheelbase 400's. It is also conceivable that Case tried more than one way to route the lines for reasons known only to them. Case purchased hydraulic pumps, motors and valves from several different companies over the years. It may be that a change in valve supplier created a need for slightly different lines.

As I said to you once before, it is a good idea to record the PIN and model # of the tractor that PTO kits, Holding Valve kits and Flow Valve kits are removed from and tag all the parts. That way, you know for sure what tractors that kit will fit with no modifications or headaches.
 

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Discussion Starter · #4 ·
Just for the record, I have many parts that I bought as parts and I have some older parts that I had as well. I have not taken any additional tractors apart.

With that being said, I spent a few hours looking at the PTOs and I concluded that the short frame spool valves have the lines from the pump entering it from the front. The longer framed tractors enter in from the rear. As well, the PTO lines that go under the transaxle motor are for the short frame. They travel under the transaxle motor and the spool valve and connect at the front of the spool valve. The PTO for the long frame tractor goes over the transaxle motor and connect to the spool valve in the rear, which is the side that the line enters it from the pump.

So, unless there is anything special about other tractors, this is what I have concluded. I tried it on seven different tractors, which all of the tests had the same results.
 

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Hi Troops,
My 1985 448 Ingersoll was delivered new with a hyd PTO and the steel lines were run above the drive motor and axle stub of the transaxle, this is an L17 PTO kit.
Tom Goldencove and I installed a short frame PTO kit on his long frame 446 (1981??) and we had to bend the underframe tubing a fair amount to make it work and had difficulty making the fittings line up but it worked!!
Mad Mackie in CT :mrgreen: :mowlawn:
 
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