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#1
02-25-2011, 12:57 PM
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Leaking hydro
Went to the garage this morning to push a couple inches of snow off the neighborhood and was greeted with a puddle of hytran under the 129. It has been sitting in the same spot for a couple weeks and is known to leak a little, but never like this. A peek underneath revealed drips hanging from the small steel lines at the bottom of the unit , tried to tighten but seemed to be tight and coming from higher up. Any suggestions on where or what it might be coming from , and how hard to fix would be very appreciated. I should mention that I topped it off and quickly plowed and put it away, it didnt appear to make it worse while running. THANKS IN ADVANCE!
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129 Plower; 72 pile;122 daily driver, 2-42inch blades 42 inch deck- 06 GMC 1500 4wd- 1964 farmall 706 
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#2
02-25-2011, 01:04 PM
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You could remove the inspection cover and clean off any hy-trans. Then start it up and maybe see exactly where the leak is coming from. Watch out for the driveshaft while running, they dont play nice!
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Nemesis
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#3
02-25-2011, 01:49 PM
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Quote:
They tend to leak more in cold weather as the o rings inside are old and hard, then add to that, cold weather and the buna rubber gets all the harder. I've seen them leak only in the cold season and when warm weather comes, they stop or leak only a minor amount. But usually they will get worse overe time, not better. As John says, remove the tunnel cover and look where it is comming from. You could get lucky find it is something less expensive to repair.
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#4
02-25-2011, 09:30 PM
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Took the tunnel cover off , but its not coming from the top anywhere that I can see. The relief valves appear to be dry the hydro lines are dry, it almost looks like it could be coming from between the hydro and rearend. Is there a gasket or an o-ring in that area it could be?
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129 Plower; 72 pile;122 daily driver, 2-42inch blades 42 inch deck- 06 GMC 1500 4wd- 1964 farmall 706
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#5
02-25-2011, 09:38 PM
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the most common leak after many years is the cork gasket between the pump and tranny, Ive seen it go on almost all of the hydros Ive owned over the years. The pump need to be pulled...and new gasket installed. There really isn't an easy way to do it without splitting the tractor, but it should be good again for another 30+ years if torqued correctly after replacing.
Jeff (teet)
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CCC 1211 71 127  102 122 1962 Original
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#7
02-26-2011, 09:28 AM
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My 169 did the same thing. Diz Jr walked me through it and it was easy. Thanks Diz. Get ya some Hytran, filter, cork gasket and rear cover gasket and you will be good to go. Don't for get to put some type of sealant on the bolt hole I'm pointing at. Mine seaped oil and it drove me crazy until I sealed the bolt.
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This ain't no hobby....it's an addiction
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#8
02-26-2011, 01:05 PM
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That looks like the spot. Thanks so much for the pics they really helped me put it the peices together. As far as I know this will be the first time the old girl has ever had the hydro unit apart, now all I need is the time to tear it down. Thanks again to all you guys and the best site on the web! P.S. will cork gasket on a roll work or should I try to find the correct replacement part?
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129 Plower; 72 pile;122 daily driver, 2-42inch blades 42 inch deck- 06 GMC 1500 4wd- 1964 farmall 706
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