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Reload this Page 1250 transmission leak. Need help!
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Old 03-28-2017, 08:59 AM
coinman66 coinman66 is offline
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Default 1250 transmission leak. Need help!
1250 has a slow leak somewhere on transmission. After about a week has a puddle about the size of a coffee can lid under it. Can't seem to see where it's coming from. Any suggestions where the likely source is? I will take off fenders to get a better look. If it's a gasket, please leave part number so I can look it up on an exploded view.
Thanks
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Old 03-28-2017, 09:17 AM
R Bedell R Bedell is offline
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It is most likely one of two things. (A) The cork gasket between the Hydro Unit and the rear end, or (B) an "oozing" Relief Valve(s). Pull the Tunnel Cover and inspect the Relief Valves first.
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Old 03-28-2017, 02:25 PM
AndrewNoyes AndrewNoyes is offline
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I was able to find mine by wiping clean, waiting and finding wetness with finger or paper towel. But someone suggested cleaning the area and dusting with baby powder, to see the leakage path. My leak end up being the round sheet metal plug, above the filter.
Good luck!
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Old 03-28-2017, 04:15 PM
coinman66 coinman66 is offline
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Originally Posted by R Bedell View Post
It is most likely one of two things. (A) The cork gasket between the Hydro Unit and the rear end, or (B) an "oozing" Relief Valve(s). Pull the Tunnel Cover and inspect the Relief Valves first.

Thanks R Bedell. It's not the relief valves for sure. Hopefully that cork gasket isn't too difficult to change?
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Old 03-28-2017, 04:17 PM
coinman66 coinman66 is offline
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Originally Posted by AndrewNoyes View Post
I was able to find mine by wiping clean, waiting and finding wetness with finger or paper towel. But someone suggested cleaning the area and dusting with baby powder, to see the leakage path. My leak end up being the round sheet metal plug, above the filter.
Good luck!
Thanks Andrew. That powder trick seems like a good idea. How did u fix the leak?
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Old 03-28-2017, 11:27 PM
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zippy1 zippy1 is offline
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Thanks R Bedell. It's not the relief valves for sure. Hopefully that cork gasket isn't too difficult to change?
I've done it twice now. Is pretty easy once you get the tractor split.
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Old 03-28-2017, 11:37 PM
coinman66 coinman66 is offline
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I've done it twice now. Is pretty easy once you get the tractor split.

Do I have to worry about parts flying everywhere when I split it?
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Old 03-29-2017, 07:26 AM
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Sam Mac Sam Mac is offline
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If you have not downloaded the manual I suggest that you do so.
http://www.onlycubcadets.net/forum/s...ead.php?t=4644
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Old 03-29-2017, 09:02 AM
Bamafan Bamafan is offline
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I also suggest that when you have the rear out to replace the cork gasket, If your tractor has internal brakes, is to check for leakage in the area around the plunger that goes inside the housing, the o-ring on the plunger can fail and leak.
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Old 03-29-2017, 03:51 PM
AndrewNoyes AndrewNoyes is offline
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I split the Tractor as desribed in the manual, then removed the old sheet metal plug. Carefully cleaned the hole, put tiny amount of oil resistant permatex and gently hammered new plug flat. I also replaced the internal brake oring, as suggested above. I found that I could grasp the rear side of the piston with needlenose pliers and sort of carefully twist it out. That saved quite a bit of transaxle disassembly. Note that to remove these thing the fluid must be drained, so it is a great time to change the filter, fluid, etc. Also, to be in this deep, it is a good time to consider the trunnion fix, if you need that, as I did.

Good luck.
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