Cat IT28G need hydraulic schematic

Hi all, I am new here, been following for a while. I have a customer that has an older Cat IT28G loader, the work functions stopped and he cant lift or tilt the bucket. The steering circuit works fine. I checked pressure going into the HRC (Hydraulic Remote Control Joystick) for the work functions and there is 300 psi going in. I didn't check the pressure coming out of the HRC for the functions. I removed the pilot pressure control valve for the HRC and it looks fine, and I also removed the relief valve for the main work function valve, and it doesn't appear to be jammed or have contamination in it.

My guess is that the HRC is bypassing oil directly to tank and not allowing oil to go to the work functions. It would be good to have a schematic for this loader as the customer bought it at auction and has nothing of course.

Also the hydraulic cooling fan circuit is not working, I havent looked into this yet because I would like to see the schematic first.

Any help would be appreciated.

Thank you,

Will-Power