L785 hydraulic charge light on no hydraulics work. Pls help

[FFPC1]

Hello members, Wondering if someone could help me please. We have a NH L785 skid steer. It was working fine this morning. All of a sudden the 'bye charge' light came on. No hydraulics work at all. The engine runs fine. Have removed seat and the drive shaft into the pumps is spinning. Checked screen filter and removed a small amount of debris. Cartridge filter is about 2 years old but only really t 50hrs old. Put 10 litre hyd oil into it and still nothing. Won't even look like moving anything hydraulics. No sudden oil leak anywhere. Not sure what to do from here. Any help would be greatly appreciated. Thank you, Brt

 

[Mike10]

Even though the drive shaft is turning, the pump shaft may not be turning. Could also be a hyd pump failure. To determine which, remove the front hyd pump, Two lines and two bolts. With the throttle in the off position momentarily crank the engine while watching the shaft on the front hydrostatic pump, where the hyd pump shaft had made connection. If the hydrostat pump shaft turns, then the problem lies with the hyd pimp. If the hydrostat does not turn, then there are splines stripped at the drive shaft or the connector between the two hydrostat pumps.