Ok.. removed and replaced gasket on fluid control valve under main mast.. not to bad but now since it seems most of the hydraulic fluid has drained from main mast and line was disconnected from valve control, so I've got a complete hydraulic system airbound.. I ran forklift about 20 min but only tilt works which I never touched..I worked the control up and down but there must be hopefully a trick to bleed all this air.. anybody got any suggestions.. thanks Dave