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Hydraulic Quick Connects as swivels

stevieb49829

stevieb49829

Well-known Member
Location
Spirit Lake, Idaho
Are quick couplers able to swivel during operation (under pressure), or are the two halves designed to stay stationary in relation to each other? I'm designing my FEL hydraulic lines and need two quick connects on pass-through hoses, to be able to easily strip the loader off the tractor. But those two lines move during up and down of the loader. I know, I know: MH 101 Jr., JD 510 loader, home made support frame. I don't need any advice on whether the loader will work on the tractor.
steve
 
I'll be interested in the replies. The Pioneer couplers I grew up with would get in a bind with pressure on them. Yes it might work, but I do not think they will last long(those balls are not very big.
 
As already stated, if the couplers were to swivel, they will probably start leaking in short order. I would recommend building your hoses with swivel fittings and connect your couplers to them.
 
I would not recommend swiveling them under pressure, it will be asking for trouble.

There are live swivel hydraulic fittings that are designed to swivel under pressure. They are not cheap!

Not having a real good visual of what you are doing, but guessing maybe a loop of hose would give enough flex without the need to swivel?
 
Steve, it is a loop of hose (x2), over the top of the bellhousing, but as the cylinders raise, that loop moves back and forth, as well as up and down. Not a lot back and forth, but enough to put twisting on the joint at the cylinder. I would like to be able to break those two lines that go through the tractor to dismount the loader, without loosing hyd. oil. and without buying two more swivel joints. They both will have swivels on the other side of the tractor which I have, so when the couplers are pulled apart, the two hoses will easily slide over the top of the bell housing, and out of the tractor. If I had a whole bunch of steel line, I'd run everything attached to the loader frame, and not shortcut it through the tractor. All that black hose is looking pretty sloppy as it is. steve
 
I will agree with those who are saying that quick couplers will not live long if forced to rotate under pressure. Just because they can doesn't mean that their design is intended to allow for this on a continuous basis.
 
(quoted from post at 23:08:22 02/28/22) I've got a couple of pressure swivels so I'll avoid the potential problems and use them AND the couplers. steve
Click to expand...

Swivels are just another source for leaks. In fact a pair of them makes for SIX sources of leaks. Two threaded connections and the swivel itself, on each fitting.

How much is it really going to swivel? I figure the hose flex is going to take up most of the motion.
 

IMHO turning male couplers in breakaway couplers will drastically shorten the lifespan of the sealing ring in breakaway. I also think male tip ""won't spin freely"" in breakaway while under pressure
 
There are all sorts of coupler styles out there, but if we are discussing ordinary Pioneer-style couplings, 504 is right. They wont turn at all under pressure. The balls cannot roll, as they are all trapped in individual holes in the coupler. With pressure on them they will simply exhibit a locked condition.
 
BE, you might just be right. I'll test hook the hoses solid first, and do the cylinder movement by hand to see if they really need any swivel built in or will just flex. I may have been over-engineering it. steve
 
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