Wacker Neuson ST31 Grapple Hydraulic will not close

[nlightfoot]

I just bought a used Wacker Neuson ST31. Used the bucket multiple times, no issue. I bought a unused JCT 72" Skid Steer Rock Grapple Bucket and hooked up all the hydraulic lines and fittings. I can get the claw to open but it will not close. It will only raise up one time, almost like once it cycles thru the computer it shuts down the auxillary functions.

I have the error code 517125:26 on my display screen and the Wacker Neuson SPN error codes PDF online only goes from 517097 to 517400 with nothing in the C category for the hydraulics. I have searched thru the entire pdf below.

(https://cloud.3dissue.net/25210/25230/25446/40506/index.html?12183)

Any ideas for why the auxillary hook up wouldn't be working? What can I try?

 

[foton]

so do you have electrical hook ups on the rock bucket? If so I would unplug it and go to the battery switch in the back turn the battery off for a while and turn it back on and see if you lose the code. my wacker sw20 is a 2017 ,but i do not know how much alike they are.