Parker coupling issue

[rd_macgregor]

You should be able to just push the male QD poppet or ball on a hard surface and release the pressure.

If the male QD is stationary, tap it with a piece of flat metal using a rag over the QD.

I tried pushing the middle of the male QD in with a nail head. Then I tried setting it on a bolt and gently tapping the back of the fitting. Neither budged it a bit. Before I try loosening the fitting with a wrench (I've had bad luck re-sealing hydraulic fittings!), I'm going to try raising the grapple slightly with a jack and see if it doesn't alter the pressure enough to let the QD work...my real concern was that the fitting might have corroded or otherwise seized up internally (and irreparably), rather than just having too much pressure behind it to let it work properly.

 

[aczlan]

Wrap the fitting in a rag, put the bolt on the middle of the QD and hit the bolt with a hammer. That will put a little more force on it than you just pushing on it will and may do the trick.

Aaron Z

 

[oldnslo]

On flat face style couplings do you have to push the poppet in aways before it it will allow oil to escape. Reason for asking is that we used some flat face at a previous employer and I don't think you could relieve trapped pressure by pushing in the poppet on them.

 

[jinman]

I'm going to try raising the grapple slightly with a jack and see if it doesn't alter the pressure enough to let the QD work...

Mac, that won't work. Both lines are under pressure, they cannot be relieved by moving the grapple. If you want to try it, use a hose to run cool water over the lines or fill a bucket with water and ice and dunk the lines in that. You have to relieve pressure from both lines. Think about it. With both lines disconnected, whatever pressure there is in one line is felt through the hydraulic cylinder to the other. They always stay at equal pressure when not hooked up to the tractor. The only time pressure might be more in one line than the other is if the hydraulic cylinder it at a hard stop. Even then, with both lines exposed to the same outside heat, they will be very close to the same pressure.

 

[newbury]

use a hose to run cool water over the lines or fill a bucket with water and ice and dunk the lines in that. You have to relieve pressure from both lines.

Yup, that's worked for me several times.

 

[BukitCase]

"With both lines disconnected, whatever pressure there is in one line is felt through the hydraulic cylinder to the other."

Which is why the "fix" I posted earlier, while not free, will ALWAYS work... Steve

 

[rd_macgregor]

There was no problem relieving the pressure on the female fitting; I was able to depress the ring in the fitting until oil dripped out. However, the male one doesn't want to budge...dang, it almost frosted last night; I should have tried it early this morning while it was still cold!
Bob

 

[sdef]

Newbie owner here: I also have flat faced connectors on my rock grapple- 1/2" Italian Stucchi brand, and I am just leaving them hanging individually, disconnected, with the hoses gently wrapped around the grapple cylinder mounts with the flat face connectors pointing down- just in case. I also leave the U.S. made Dixon connectors on the FEL mounted bracket disconnected from anything, when not in use and saw no reason to do otherwise.

I also thought about connecting the two connectors together for storage. But flat faced connectors are sealed, so is there any reason to connect them to anything when not actively connected to a device hose, in order to keep them clean or for any other reason?

 

[sdef]

New owner here: I also have flat faced connectors on my rock grapple- 1/2" Italian Stucchi brand, and I am just leaving them hanging individually, disconnected, with the hoses gently wrapped around the grapple cylinder mounts, with the flat face connectors pointing down- just in case. I also leave the U.S. made Dixon connectors on the FEL mounted bracket disconnected from anything, when not in use and saw no reason to do otherwise.

I also thought about connecting the two connectors together on the grapple for storage, but decided not to as I did not want any of the internal components taking any kind of set in their open, flow through position. Flat faced connectors are sealed. So is there any reason to connect them to anything when not actively connected to a device hose, in order to keep them clean or for any other reason?

 

[jinman]

There was no problem relieving the pressure on the female fitting; I was able to depress the ring in the fitting until oil dripped out. However, the male one doesn't want to budge...dang, it almost frosted last night; I should have tried it early this morning while it was still cold!
Bob

Bob, in that case, I'd bet the hydraulic cylinder is in the hard stop and there's no movement that can relieve the pressure on the male. If you move it away from the stop, it will only increase pressure. I think it's time for an ice pack or an early morning attempt. You may have missed your chance this morning.