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Discussion Starter #1 (Edited)
I have a older lgt ford tractor that has been cut down to a bare minimum( by previous owner/owner's) I have since built a buggy for my girls with it. Was told it ran a year before I bought it. Has sat for about 3 since I've owned it. Had a slight problem with the motor turning the pump the wrong way. Not the original motor, new motor was mounted backwards from original.

Well it's moved a time or to since I've been working on it not more than a ft of two, since my shop is small. Yesterday I pulled it out the shop and put the top on and backed it back in, move probaly 20 ft. It was jerky and hesitant to move. Then last night as I was driving it to the house it just quit moving. Hydro lever engages and it tries to move but it doesn't, jacked the rear end up, same thing. Changed the fluid, no change. Fluid is full, no filter on it ( how I got it).

I need suggestions on where to go now???????????
 

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Sounds like not enough oil. How did you change/add oil? Eatons can tricky. Take a picture of hydrostatic.
 

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Discussion Starter #4
I drained it out the bottom, removed the top plug and the middle plug. Filled until oil ran out of middle plug
 

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I drained it out the bottom, removed the top plug and the middle plug. Filled until oil ran out of middle plug
Your talking about the transaxle right.
I would suggest remove tube at bottom and check that oil flows out (into a bucket) easily. Also, try getting is little more oil in by jacking the back up.
 

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Discussion Starter #7
Yes the trans axle. I put the middle plug in and added a little more oil before reinstalling the fill plug.
 

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Discussion Starter #9
My current situation.

I have into the pump. All looks well, nothing looks out of place. But I'm not a hydo expert. I'm been into the trans axle. All looks good. But then again this is the first one I've ever been in. 2nd time in the transaxle. 1st was because of the high/low lever was bent, ( was when I bought).

Still nothing points to a major mechanical problem. So I assume I have a hydro problem.
 

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From the symptoms, I suspect that the charge pump has failed.
 

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Seems like hydrostat is not getting enough charge. Could be low oil, could be failed charge pump. Also, it could be charge pump is sucking air. The chain drive is causing a side load. This can upset the shaft seal; especially if the seal is old. You should test charge pressure, but that requires a gauge and a needle valve. Try plastering grease around shaft where the seal is and/or running the pump directly with drill gun. Eaton has an extra bearing option for operating with side load.
 

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Discussion Starter #15
Seems like hydrostat is not getting enough charge. Could be low oil, could be failed charge pump. Also, it could be charge pump is sucking air. The chain drive is causing a side load. This can upset the shaft seal; especially if the seal is old. You should test charge pressure, but that requires a gauge and a needle valve. Try plastering grease around shaft where the seal is and/or running the pump directly with drill gun. Eaton has an extra bearing option for operating with side load.

I have double checked the fluid levels. But I will try the grease, and a drill. If it was sucking air, would it leak oil out?
 

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So a whole new pump?
Not likely. More like a repair kit to replace the (possibly) broken gears in the charge pump.

Air ingestion is also a possibility, but it shouldn't shut down the pump totally, just make it operate erratically. If it was sucking air on the inlet side bad enough to cause shut down, it would leak oil with the engine shut off. Your pic indicates a hard line between the pump and reservoir which will result in some seepage of fluid if it is leaking air. If it was a hose, the same might not be true.
 

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I was looking at your original post; https://www.mytractorforum.com/threads/hydraulic-promblems-i-think.1321737/#post-12230131
The problem with this project is that it wasn’t running when you got it. The previous owner had a problem and gave up. You bought his problem. Maybe he modified the charge pump in his attempt to get it working. I think you’ll have take apart the charge pump and take lots of pictures. When the engine is running, what rotation is the input shaft; CW or CCW ( looking at the end of input shaft).
 

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Discussion Starter #19
No. Air is thinner than oil. Also, side load increases with applied torque. A new seal is $15-$20.
Not likely. More like a repair kit to replace the (possibly) broken gears in the charge pump.

Air ingestion is also a possibility, but it shouldn't shut down the pump totally, just make it operate erratically. If it was sucking air on the inlet side bad enough to cause shut down, it would leak oil with the engine shut off. Your pic indicates a hard line between the pump and reservoir which will result in some seepage of fluid if it is leaking air. If it was a hose, the same might not be true.

I have been into the charge pump and found now broken gears.

I was able to find online a used hydro, hard lines, and a filter. I have them coming. Gonna put it back to stock and see where that gets me
 

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Discussion Starter #20
I was looking at your original post; https://www.mytractorforum.com/threads/hydraulic-promblems-i-think.1321737/#post-12230131
The problem with this project is that it wasn’t running when you got it. The previous owner had a problem and gave up. You bought his problem. Maybe he modified the charge pump in his attempt to get it working. I think you’ll have take apart the charge pump and take lots of pictures. When the engine is running, what rotation is the input shaft; CW or CCW ( looking at the end of input shaft).
I believe you are correct.
It is spinning ccw with the chain drive. Problem was the new motor. It not the original motor, and I just got a pile of parts. The previous owner had pieces of a driveshaft attached to the new motor, as if he was attempting to replace the motor. So I continued down that path without doing research. I was unaware that the original motor attached to the flywheel side.

But now on the 2nd of January I'm expecting a new ( to me) hydro pump,filter,and lines. All off the same tractor.
 
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