Posted by TimV on October 30, 2020 at 15:05:21 from (74.78.247.41):
In Reply to: Boom leak posted by NVArt on October 30, 2020 at 14:13:16:
Recently had this same problem on my little tow-behind backhoe. Pulled the cylinder apart and the internal seals came apart in chunks. No external leakage, just the hydraulic fluid leaking past the internal seals and so to the other side of the piston. Replaced them (and the rest of the seals while I was at it) and it's worked fine since. It certainly COULD be a valve leak--depending on your setup you can sometimes change hoses between valves to see if it still does it--but I'd say an internal cylinder leak is more probable.
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