DisConnecting Kubota QD's - Suddenly a Problem ???

[Gordon Gould]

This may seem like a dumb question from someone who has owned this tractor for 17 years but I need help before I do something drastic. The QD's on the rear remotes are the push in and pull to disconnect type. Always worked fine. I disconnected my side link and connected in a dump trailer yesterday. Now I want to take the trailer off and can't separate the QD's. The pressure has been relieved with the control valve (many times ) and no amount of pushing and pulling that I can apply by hand will separate the connectors - either one. Can anyone help ????? In case it matters, but I don't understand how it would, the top link on the other rear remote is still under pressure. The FEL has been relieved also. Thanks

gg

 

[newbury]

Are you trying it in the heat of the day?
Try cooling the hoses down with cold water.

 

[Gordon Gould]

After my call for help I went out again and push/pulled a little more to no avail. So I went in for lunch. When I went out again, just now, I pulled the tractor forward enough to separate the clevis hitch which allowed me to lower the 3ph and winch to the ground. Then I lengthened the top link laying back the winch a ways to give me more room for a big fight with the QD's. Shut down the tractor and cycled the control valve. Went around back and pulled the hoses off with no undo trouble ??????????? So I guess I cried wolf and don't have a clue what changed.

gg

 

[newbury]

Glad to read problem solved.

 

[Texasmark]

After my call for help I went out again and push/pulled a little more to no avail. So I went in for lunch. When I went out again, just now, I pulled the tractor forward enough to separate the clevis hitch which allowed me to lower the 3ph and winch to the ground. Then I lengthened the top link laying back the winch a ways to give me more room for a big fight with the QD's. Shut down the tractor and cycled the control valve. Went around back and pulled the hoses off with no undo trouble ??????????? So I guess I cried wolf and don't have a clue what changed.
gg

My guess and I wasn't there so it's just a guess from experiences I had, is that you had pressure on the cylinder. Since you did the first thing one needs to do....bleed off the pressure with engine off, I'm going to bet that had you looked at the trailer you would have seen it move slightly every time you hit the direction that reduced the lift pressure. When you came out later and did what you did, you took the trailer weight "pressure" off the lift cylinder and the back and forth movement of the selector valve then relieved the little bit of pressure that was still on the lift line.

 

[PaulWS]

I have L3410 with grapple, last couple years had trouble disconnecting/connecting hydro hoses with pioneer connectors. Did some research and found couplers by Holmbury HCP series male flat faced and HQ female flat faced couplers. The male has a pressure relief built in. I'm 72 and don't have the strength required for the pioneer connectors. These Holmbury connectors are so much easier to use, they are pricey but worth it to me.

 

[Gordon Gould]

My guess and I wasn't there so it's just a guess from experiences I had, is that you had pressure on the cylinder. Since you did the first thing one needs to do....bleed off the pressure with engine off, I'm going to bet that had you looked at the trailer you would have seen it move slightly every time you hit the direction that reduced the lift pressure. When you came out later and did what you did, you took the trailer weight "pressure" off the lift cylinder and the back and forth movement of the selector valve then relieved the little bit of pressure that was still on the lift line.

I respectfully disagree with your suspicions - It had to be something even dumber than that on my part but I don't know what. There was no movement in the trailer (I know enough to look for stuff like that) and I held the valve open in both directions, multiple times, way longer than would be necessary. They are ball faced Pioneer connectors. Maybe I don't realize how weak I am getting, like PaulWS says, and the better access allowed by lowering and leaning back the winch made all the difference. Or it could have been just the hardy yogurt and fresh blackberry lunch the wife fed me that gave me a surge of power.

gg

 

[Industrial Toys]

I had the push in, pull out couplers fail on our JD. They are extremely complex and not really repairable. So I replaced them.

On couplers with the pull back collar, the balls around the perimeter can get frozen in place from not being moved in a while.

It never ceases to amaze me how something covered in oil can rust so quickly when not used.