Kubota l35 backhoe. Hydraulic fitting on cylinder that swings the hoe is getting loose. As cylinder pivots the fitting is turning about 10 degrees and the nut gradually loosens. Tightened as much as I safely could. Still works loose. Is there a fitting which would swing back and forth a little without affecting nut.
oldnslo
Super Member
Sounds like hose strain is working the fitting loose over time. Can you watch how the hose flexes when in use during swing function. Might just be a case of orientation of fitting and hose will solve the problem.
Depending on thread size and style there might be a live swivel fitting that would fit in that location.
Depending on thread size and style there might be a live swivel fitting that would fit in that location.
rScotty
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Sure, there are swivel connections in every shape and thread. Some ends are made to compress right into the hose, but you can add swivels to any existing hose or fitting - Usually under ten bucks. It sounds like the hose you have may be a rgeneric eplacement hose that is missing the swivel end.
Online try surpluscenter.com or hydraulic-supply, or lots of others online.
WinterDeere
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I'm not an expert on this, but I think most of those swivel fittings were made to swivel for initial positioning only, and not designed to continuously swivel during use and when pressurized. I only mention this because I've seen listings for "live swivels" and "rotary joints", which are clearly different and more robust than the usual cheap little swivel elbows. But check me on that, I could easily be wrong.
This might be a problem better served by a hose that's 4 inches longer and installed in an orientation where it never pulls on the fitting in the "loosening" direction, if this is the case.
This might be a problem better served by a hose that's 4 inches longer and installed in an orientation where it never pulls on the fitting in the "loosening" direction, if this is the case.
You'd be correct. If a person looks up and buys a "swivel" hydraulic fitting, they're not going to get something designed to swivel under pressure. It only swivels for installation. If he wants it to swivel under pressure, he'd need to get something called a rotary union, which are considerably more expensive and hard to find. He should be able to make something work without needing to resort to that. Perhaps a longer or more flexible hose. Pictures would help. I use to have an L35 with a backhoe and didn't have this problem, so I'm sure it can be done without a rotary union.
