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Message: <blockquote data-quote="MtBaldyBobcat" data-source="post: 50807" data-attributes="member: 6880"><p>I bought a Bobcat 742 (SN# 11809) from a friend who said the hydrostatic pump was bad. Don't know a thing about hydraulics, but I managed to pull the hydraulics completely apart, clean up hoses, port block, etc., had the hydraulic control valve & lift rams & backhoe stabilizer rams rebuilt, installed a rebuilt hydrostatic/hydraulic pump, and put it all back together. I just fired it up for the first time yesterday. It works, but the transmission light is on. There's certainly a ton of air in the system (started/stopped 4 times so far and lots of bubbles in the oil tank), so maybe the air needs to bleed itself out before the pressure can get high enough to make the pressure sensor happy. I'm a little concerned, though, since I obviously don't want all my work to be for naught by frying the rebuilt hydrostatic pump. Lift, tilt, and stabilizer rams work fine (I know... separate system), and it does drive (I've probably only moved it 100 feet total), though seems it could have more power. I've never driven anything hydraulic in my life, so I'm as green as they come. Does the trans light staying on until the bubbles stop appearing in the tank sound reasonable, or should I start troubleshooting even before that happens?</p></blockquote><p></p>