case 580d backhoe-- attachments

[rjbryan]

after spending a good part of the morning chasing/following ,,i found where at least 1, possibly 2 (both ) hydaurlic lines w/ quick couplers go but i cant find any reference to or picture of the pictured device,,,,,the 2 extra/aux. hydraulic lines are attached to it an there are a few wires leading from it (yet to follow ,thats another day) .it is located on the would be passenger side of tractor at the end of the loader bucket arm next the front of cab) any ides ?

 

[BukitCase]

There should be a Power Beyond port at the rear of the loader controls, should be a 3/4" line - this normally goes to the hoe valves alongside the right (passenger) rear wheel and under the floor plates, back to the hoe control valves.

Sounds/looks to me like yours has an aux solenoid valve that is probably plumbed in BETWEEN the loader valves and the hoe valves - if so, the PB out of the loader valves should be going to the solenoid valve, the tank/drain port of the solenoid would be teed into tank return (there should be a tee or two on the lower inside of the loader valves toward the cab, this is tank return) and the A and B work ports would connect to your QD's - finally, there should be a PB output on the solenoid valve that would continue on to run the hoe.

There doesn't look to be that many lines on the solenoid though - it's possible that ALL its ports can stand full pressure. if so, I'd guess that the two larger lines going DOWN are connected to your QD's, because the large line going rearward seems to be headed the right direction to get to the PB off the loader.

That's my best guess ATM without more pics and input from you. I'll be curious to see where the wires go, and if there's anything on the other end... Steve

 

[J_J]

The valve with wires could be a 3rd function valve for the hyd to the aux circuit on the boom for hyd hammers, hyd motors, or thumb, or a simple aux circuit.

Did you ever remove the QD's off those lines and see if yo had any flow with any lever activation.
If not, see if you can find a switch to activate the solenoid on the valve.

If it is in fact a solenoid valve, remove the wires and apply 12v and ground to the solenoid and see if there is flow out the aux hyd lines.

It should easy enough to put a meter on the solenoid and flip some switches to find the one for the valve.


It could be the valve that switches the hyd flow from normal flow to high flow.