This machine has a bail clamp on it. When operating the clamp or tilting, the hydraulics slow down when you throttle it up high. The clamp and tilt go about 1/2 speed and you can tell that a releif valve has opened. If you let the rpms go back down low the valve seems to close and the movement speeds up. Any ideas where to start checking the control valve that has lots of valves on it (SAS and seat switch)? Thanks for and ideas.