New Excavator Quick Connect Won't Close

[requiredwhen]

I'm thinking this might be a safety thing. You always have pressure to the rod end of the cylinder. This being the normally closed position for the system. Then, you activate the open function. Piston diameter being larger on the back side of the piston forces cylinder open so the bucket can be removed.

Its a wild guess but some systems work this way.

ok, I'll see what I can find in way of a safety switch.
Thanks

 

[Michael In Tennessee]

My post had nothing to do with a switch. Did you understand what I wrote?

 

[WranglerX]

The weird thing is that the flow to the coupler is active if the switch is on or off. It seems like the valve isn't closing. When I switch the hoses and turn the machine back on the coupler cylinder automatically opens or closes. Planning to take a look at the valve tonight or tomorrow.

From your description I would be highly suspicious of the actual valve operation... Maybe jammed or something wedged in valve or solenoid coil open...