CASE 90XT Hydraulic attachment lock works once

[Hard Case]

I have a Case 90XT with a solenoid that actuates the two rams to lift the attachment locking hooks. The lines go through a valve box out near the rams with two plungers in it. If I release the pressure in this box by opening the caps to the plungers, the hooks open just fine. First the left and then the right. You can play with them as many times as you like. As soon as you put any pressure on any other part of the hydraulics (eg move the arm) the rams stop working.

With anything attached, these caps are difficult to get to, so I need to get them fixed. Trying to release that pressure every time is not viable.

The springs and balls in the valve plungers are free and everything looks clean.

One valve seems to work one ram - the left one goes first. If I release the pressure of just that valve, only the left ram works.

In normal operation, while the solenoid is on, the fluid extends the rams and as soon as the solenoid valve is off, the rams retract automatically. After you have tried to move anything else on the machine, the hoses to the valve box move when you power the solenoid, but no movement on the rams.

I can see how the hydraulic locks would be a handy feature, but at the moment, it's making the machine unusable. Any help would be greatly appreciated.

 

[Too much junk]

I'm having the same problem did you ever figure it out?

 

[steve wherley]

If your xt is late model it has relock relay under switch location It.locks attachment every 15 seconds. Jjust had customer with issue's if yours has that the relay?timer And is $160 check for power At 2 cavity plug at start area for power if powered all the time problem the timer relay or switch.The solenoid valve is located starter side in rear on side wall of frame the locking valve at coupler is not likely the problem . good lock