shaunw7708, your machine runs a gear pump for all hydraulics, this pump is constant pressure constant displacement, the only thing that makes flow change is engine rpm. pull the floor boards, under where your left foot was is where the pump is, you can also see it a bit if you look behind the engine on the left side of the machine. anyways is there any oil residue around pump? if so change those O-rings, top and bottom, you will have to drain hydraulic tank or pull a vacuum on it. as far as the tilt not working properly I am guessing you have a packing failure in that cylinder. will the blade lift the front of the machine off the ground at idle, even slowly? if not pretty certain you have a pump failure by the sounds of it anyway. the proper way to diagnose would be to put a gauge on the system...2. Problem: Pump makes unusual noise, the cylinder rods do not move smoothly and there are air bubbles in the oil. follows is a cut and paste from sis....TIO
PROBABLE CAUSE:
1. Oil aeration from a loose connection or restriction of the oil line on the inlet side of pump.
2. The oil level is too low.
3. The cylinders and lines are not properly purged of air.
4. Porous welds or broken baffles in hydraulic tank.