HI GUYS, I NEED SOME HELP PLEASE. I HAVE A NEW HOLLAND M135 , I FITTED NEW HYDRAULIC OIL FILTERS AND OIL , NOW I CANT GET RID OF AIR IN THE SYSTEM. PUMP MAKES A BAD HUMMING SOUND AND THE TRACTORS 3 POINT, POWERSTEERING ETC. IS NOT FUNTIONING CORRECTLY. THE FILTERS HAVE OIL IN, AND LOGIC TELLS...