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#11
02-23-2019, 12:36 PM
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When you "pulled the pump" you removed the hydrostat. Internally, it contains both a motor and a pump, which translates constant speed input shaft rotation to continuously variable output shaft (through the cork gasket) to the rear end.
The trunnion arm is attached to the hydrostat, so it could be carried that way to the welder.
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#13
02-23-2019, 12:55 PM
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Here's what you are dealing with. This is the inside of the hydro with the cylinder block removed. (some other pics show the cylinder blocks and damage from towing this tractor).
The trunnion arm goes out of the picture at bottom left, but you can see how it is attached inside the hydro to the swash plate. In one of the later pics you can clearly see the trunnion arm and control plate on the hydrostat.
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#14
02-23-2019, 12:58 PM
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Yeah...now that I look back at pics I took of the cork gasket job, I see that the trunnion arm/shaft was part of what I took off. My bad.
How unreliable my memory is becoming is even scarier than tackling some of these mechanical jobs.  So, now, it's a matter of simply taking the pump back off. No big deal since I still have the cam plate off so we're only talking about 3 bolts. There is a welding shop right down the road. I've had Cub work done there before. BUT....what about the cork gasket? I already had all 4 of these bolts tight, then loosened 2 of them again when I decided to do some work on the trunnion and hopefully shim up the one plate a bit. Bad for the gasket to loosen / retighten the pump bolts? Guess as long as I wouldn't move the pump horizontally at all and run the risk of the new gasket being somehow damaged - should be ok. I have the JB Weld and was going to try that but...undoubtedly getting it welded is the far better way.
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#15
02-23-2019, 01:04 PM
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#17
02-23-2019, 01:27 PM
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Anatomy 102..
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#18
02-23-2019, 01:30 PM
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#19
02-23-2019, 03:30 PM
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Yea that's what I would do ! like I said if your going to pull the hydro to get the weld repair then I would also put another new gasket in ! Not worth the risk of having it leak if you reuse it !
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#20
04-22-2019, 06:08 PM
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It appears they are spring loaded, looks like they just popped out of place. I have a hydro from a 129 that would only go forward, did not even have a neutral, let alone reverse. Could this be from moving around without releasing plungers? I have another hydro that I am installing on that tractor so I can get it back operational sooner, I want to dig into it and see what might be wrong within, largely for the experience of it. I have another nice 129 frame without an engine or transmission, if I can fix this hydro I may look for an engine and try to put this other 129 together..... never have had one of these hydro units apart. I have located a couple of seal/ gasket kits via Ebay that don't seem terribly expensive. (NO, I am NOT gonna send it in for the $1500 "rebuild service" that is advertised there, for one of these units) there is a guy about 20 miles from me that has all of the innards of a hydro from a 149 listed on Ebay right now. I'm thinking of biting on it for spare parts.
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