hi i just bought a bobcat 630. the problem is the right side, when it first starts up and you use it, it works okay but you can tell that the left side has more power than the right and after you use if for 15 minutes the right side barely works. and the right side makes a almost sqealing noise . i took it all apart and dont see anything wrong, i was thinking that it could be the drive pump? also was wondering where the bronze filter was.