Bobcat 337 Case Drain Filter

I have a Bobcat 337 mini ex, I bought 2 new complete final drive motors and almost immediately they both started to leak fluid behind the sprocket, I am assuming the face seal? I looked for a case drain filter, and blew out my lines with compressed air. Is there a case drain filter on this machine that might be stopped up, and if so where the heck is it? Bobcat dealer is not much help at all. Thank you