JD4105 3rd Function Couplings - Difficulty

[LouieJunior]

I have a new JD compact tractor with a root grapple and a bucket for use with my loader. I have some trouble disconnecting one of the 3rd Function hydraulic couplings (used with the grapple). I eventually got it after learning how to relieve the pressure in the line.

Now, one coupling (green) is stuck on (can't remove) -- and the orange will not connect properly. Collar won't slide back on the green line. I can slide the orange line collar back, but can't insert the connection far enough to lock-in.

I've tried muscling this several times with no luck. The two couplers are so close together, they are hard to access .

 

[J_J]

You might try some new QD's that the sleeve slides both ways.

Some people have made tools to assist in connecting couplers.

 

[gengine]

First off, Welcome!
Sounds like there is pressure in those lines. You may try wiggling the levers without the tractor running to free up the pressure. A trick I do sometimes is stick a screw driver in there and push in the center. Be careful doing this, as you may end up wearing it or just making a mess. It depends on how much pressure is in there. Wear gloves when doing this.

 

[LouieJunior]

Gengine, This morning I could easily slide the collar back and undo the coupling - green. You were most certainly correct about there being line pressure. I still can not attach the orange line. The male end (connected to the Grapple) will not go all of the way into the female connector (connected to the tractor). I tried your trick with the screw driver without success. With both now being disconnected -- at least I can resume tractoring with my bucket attached!

 

[Zebrafive]

Use wrenches to loosen one or both couplers to relieve the pressure. Then tighten and connect.

 

[J_J]

Look in the female couple and see if some of the rubber seal is protruding into the barrel. If so , replace the seal or obtain a new QD to match.