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finding source of leak

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Posted by Dave on July 03, 2003 at 11:23:59 from (

I've just acquired a Kubota B1550 with 600 hrs. It's in good shape paint still fresh even underneath. It has an annoying hydraulic fluid leak from the bottom left side of the rear end out near the axle. In an effort to track down the source I powerded it, the left side, front and back top and bottom of the rear end and axle with cornstarch. But I didnt' a single telltale trail of leaking fluid that I could trace back to a source. Instead it looks like the fluid was sprayed or that it sweats. It collects and drips off one of the nylon plug thread protectors on the bottom of the axle. further it is not noticeable immediately after using rather it take quite some time, like a day or two to show up.
Anybody seen a leak like this before and/or have suggestions of how to track down??

Oh also I have a "wet" stain on the muffler which is on the left side of the tractor. I thought perhaps one of the FEL hoses on the left may have a pinhole leak, so I wrapped the hoses in toilet paper and did about 3 hours of bush hogging. the toilet paper remains dry. the stain on the muffler certainly looks like Hydro fluid and it faces the engine's left side cover. I thought perhaps the a pinhole leak could be spraying the whole left side of the tractor and collecting on the left rear end and axle, but such does not seem to be the case.


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