My Kioti DK45SE has about 100 hours on it and everything has worked great. Today, I started it up and I could lift the front loader but not the mower on my 3 point hitch. First time. I checked the fluid level which was normal. Do I bleed the system next? I know where the bleeder bolt is located but I'm not sure if I need to remove it with the engine running but the hydraulic not under load? Any hints?