Bobcat 873 Aux hydraulics not working

[Bob873]

New to me 873 F series. I just tried to use the aux hydraulics and nothing. The green lights are working when I push the button to turn them on. When I use the thumb switch I see a draw on the battery gauge. I have tested the coils by activating the aux hydraulics with the nuts removed from the stems that hold the coils down, to see if they pull back trying to stay on the stem. They don't so thinking the problem is no power between the handle and the coil. I found a fuse labeled Aux on the right bottom of the motor but it was good. Is there any other fuses or relays I need to check? Does anyone have a diagram of how this system runs?

 

[Chalmers]

There should be a Warning and Fault Code associated with this malfunction. If you Post the codes here ,maybe we can help. Your Owners Manual lists and explains the Fault Codes. You can find a repro Owners Maintenance Manual on Amazon. Let us know what you find?

 

[Bob873]

There should be a Warning and Fault Code associated with this malfunction. If you Post the codes here ,maybe we can help. Your Owners Manual lists and explains the Fault Codes. You can find a repro Owners Maintenance Manual on Amazon. Let us know what you find?

No codes or alarms. I do have a service manual. I have power to the coils that sit on the solenoid valve stems. Both getting the correct 6v and I can feel them pull down with I hit the switch. I pulled the solenoid valve stems and took them apart and cleaned them. Reinstalled them and they worked. I was able to open and close the jaw of my tree puller. Well this morning I go to load the skid and they are stuck again. I didn't have time to pull the stems again to see if that would fix it again. Could my oil be that dirty that they get stuck over night? I do have a slow leak so I add fluid every few days to top off. So I fig by now the oil has been "changed". The oil looks clean/clear and when I pulled the stems they were not covered in silt. This skid is new to me so I'm not sure how long its been in the aux has been used. Before I cleaned the stems they were stuck. After I could see the rod move about 1/4" when I fully press the switch to either side.