I replaced the Electric motor. In the process a couple questions came up. with all 3 shafts extended and motor removed there was fluid filling the cavity over the pump. I pored out the fuild and replaced with new. Then installed new o ring and motor. then I removed the fill plug and topped it off. #1 does this sound right? # 2 can you over fill this unit. It seems okay.. My biggest concern is possibly pushing fluid into electric motor