I have an intermittent problem with my Mustang 2076 skidsteer loader with the lift speed of the bucket and the auxilary power. The lift speed is ok again until i tilt or open/close the 4 in 1 bucket then it reduces to about 1/2 pace. To get it to work at full speed again i need to reduce the engine speed to idle, start to lift the bucket and then give full revs -- all is fine again until i tilt or open and close the bucket. I have replaced both safety solenoid valves (which showed some corrosion) and adjusted the pressure relief valve slightly. However, problem still exist. Has anyone experienced this problem?