I have a cub 3235 I bought it new in 2001-02. It ran great until this summer. About half way through mowing my yard it lost all power. I took the hyd pump a part the gerotor was broke a small section chewed up. I replace the gerotor the internal filter. I clean the valves out the best I could. I put it back together no power to deck lift or trans. Little power to power steering. Is there air in the system and how do I bleed the air out? Is there still metal shavings in the system? Maybe the pump is shot. I appreciate any help. thanks jeff262