Low Hydraulic Power John Deere 160LC

Machine is a 2004 John Deere 160LC. Was operating the machine when I lost 90% of my hydraulic power. Then when I traveled it to a spot to work on it I ended up losing 100% of the power. This is for all functions. Pulled main filter and replaced it. Old filter was still perfectly clean.

Let machine sit for 24 hours went back and had 50% power for about 3 minutes then lost it all again. No visible hydraulic leaks. Fluid level is still good. Any ideas?

Low Hydraulic Power John Deere 160LC