Attaching quick couplers?

[ovrszd]

The flat face don't leak at all. Amazes me everytime I use them. My whole life had been spent with the Pioneer couplers. Like you said, they puke out some fluid every time. Drives me crazy on my rears as they are all Pioneer. Makes a mess on the rear of the tractor.

And to stop the problem we are talking about they would only need to leak a few drops to relieve any potential pressure.

 

[94BULLITT]

I know the proper procedure on how to hook and unhook the hydraulics. I can't figure out why they can be hard to hook up. If you are using the tractor with attachment hooked up more than likely they hydraulic fluid in the tractor is warmer than the ambient temperature. So I can't see the sun warming the oil and making thing difficult.

I know a guy that uses remotes to operate his snow blade. The dealer left the hoses loose on the loader, not attached to a bracket. He calls his buddy to help hook the snowplow up. They both have to push on the a hose to get them hooked together.

 

[ovrszd]

Before I had fully learned my lessons and avoid doing such things,,, I've unhooked an attachment in the morning, sunny day, tried to hook up a couple hours later and had to release pressure. Understand, there is no air to cushion this expansion. If the fluid warms a very few degrees you've got pressure.

 

[kco]

As others have mentioned....drain a bit of oil from each hose when you disconnect. It leaves an airspace to allow for expansion. I learned this trick on TBN and have never had a problem since doing it.

 

[Gary Fowler]

I have never had back pressure so great that I couldn't just tap the coupler end on a piece of steel (either on tractor or implement) to release the pressure. Since I rarely had a rag handy, I found that a little tilt of the hose toward you (tip is opened up on the side from you) and the oil will all go somewhere besides on you. It only takes a couple of light to medium taps to rid the pressure build up.

 

[k0ua]

As others have mentioned....drain a bit of oil from each hose when you disconnect. It leaves an airspace to allow for expansion. I learned this trick on TBN and have never had a problem since doing it.

Another thing that has been suggested but I have never done because I have never had a problem since I learned to let some fluid out by disconnecting and re-connectiong the Parker/AG connectors, is to put a short length of empty hydraulic hose with the correct connectors in series with the two existing implement hoses when you take them off. This would prevent any pressure build up in the hoses, and this would seem to work for the Flat Face connectors also that don't "puke". Of course you would need to drain this short length of coupling hose often to prevent fluid build up in this hose.

 

[94BULLITT]

Someone should put a gauge on one of their attachments and put it out in the sun and see how much pressure it builds.

 

[k0ua]

Someone should put a gauge on one of their attachments and put it out in the sun and see how much pressure it builds.

Now THAT sounds like a fun experiment.. all in favor of Roger doing that, please say aye. opposed?. The aye's have it, motion carries, Roger please report back your findings at your convenience. Thank you

 

[94BULLITT]

Now THAT sounds like a fun experiment.. all in favor of Roger doing that, please say aye. opposed?. The aye's have it, motion carries, Roger please report back your findings at your convenience. Thank you

If you are you donating the gauge and necessary fittings I'll do it

 

[k0ua]

If you are you donating the gauge and necessary fittings I'll do it

If I had the gauge and fittings, I could just put it on my own grapple.:laughing:

 

[94BULLITT]

If I had the gauge and fittings, I could just put it on my own grapple.:laughing:

I have this gauge.

Save on Star TU22 at ToolTopia.com

I guess it would work with the appropriate fittings.

 

[k0ua]

I have this gauge.

Save on Star TU22 at ToolTopia.com

I guess it would work with the appropriate fittings.

Yeah, I bet it would..I doubt the pressure rise is anything near 2000, I am thinking more like 200 maybe less.

 

[94BULLITT]

Yeah, I bet it would..I doubt the pressure rise is anything near 2000, I am thinking more like 200 maybe less.

I usually hook the hoses together on my attachments that require hydraulics. To do this test would I have to do that or could I remove a quick disconnect and put the guage on?

 

[k0ua]

I usually hook the hoses together on my attachments that require hydraulics. To do this test would I have to do that or could I remove a quick disconnect and put the guage on?

I would think you would want to build it like this: first existing connector. new connector of proper type/*** Pipe T with top of T going to gauge.....new connector of proper type/***... other existing connector.

 

[sdef]

I replaced my flat face couplers with connect under pressure types on the tractor and grapple. This fixed about half the problem, but enough pressure could still build up to cause issues I did not want to deal with and I searched for a 100% fix.

After posting my issue, several TBNers came up with various methods that would have fixed my connection problems. The one I finally decided on was the one attached. It has the mating connectors screwed into standard PVC plumbing adapters with a tiny hole drilled into each PVC set to allow pressure to escape and stay low. Now after I relieve pressure on my grapple and disconnect them, I simply reconnect my terminal end couplers to the grapple side and now not enough pressure builds up to stop reconnecting under any circumstance I have encountered so far.

The first two pictures show the drilled holes for pressure relief. Inside of the caps are filled with rags to absorb the oil and reduce any long-term dripping. These are the original flat face couplers removed from the grapple and replaced with connect under pressure types.

 

[BillinTX]

check out these threads

http://www.tractorbynet.com/forums/...-hydraulic-coupling-pressure-relief-tool.html

http://www.tractorbynet.com/forums/kioti-owning-operating/265646-fel-removal-3.html

post 28

and patent

Patent US7448406 - Hydraulic coupler pressure relief tool - Google Patents

 

[94BULLITT]

I would think you would want to build it like this: first existing connector. new connector of proper type/*** Pipe T with top of T going to gauge.....new connector of proper type/***... other existing connector.

I was thinking that would be the proper way. I may have some fittings so I can rig up something temporary for testing purposes.

 

[the old grind]

I asked elsewhere about 'connect under residual pressure' male connectors (ISO 5675). Well, o) it seems the tip has an extra 'pip' (valve) that allows pressure release before the poppet is pushed off it's seat. (might have looked closer and figured it out) Glad I bought this type after what I'm learning here, and willing to put up with a little spillage if I don't have to hammer 'em on.