first post so be kind....... thanks for a grate forum and if anyone could help i would be very grate full i own a old bobcat 632 skid steer just for home, saves me digging, and after changing the rear wheel bearing the hydraulics started tapping. i know the rear wheel bearing has nothing to do with the hydraulics but im trying to give all the information i can....... anyways i carried on regardless (error i know) until eventually the tapping got louder and eventually the hydraulics died. i took the hydraulic motor complete to a (laughs) specialist, labrador hydraulics, who duely ripped me for $800. the guy saying the plates "needed lapping", knowing nothing about engineering or hydraulics i took his word, a week later i picked up the motor installed it but it was exactly the same as b4. i then called bobcat.com.au who sent Ben from Nerang bobcat, a great fella and very helpful. after a couple of hours he changed the pump round as the other guy had it pumping oil out of the hydraulics back to the tank, and got i working, shortly after running it, once again lost hydraulics. Ben tried for a further hour eventually giving up and telling me "its sucking in air from somewhere" he did a great job and told me id be better pulling it apart, getting a seal kit and replacing the seals. so where could it be sucking air in? wheres the best place to start lookin as i dont wanna spend $300 on seals if its something easily fixed... as i mentioned this is my first bobcat and even though im quite mechanicly minded i am a newbie to hydraulics. any info would be a great help ps sorry for the long post but thought it better explaining what happend rather than just "bobcats sucking air in help" pps how do i attach photos?