I'm in need of help. I have a diamond plow which has a engine driven hydralic pump setup with an electronic valve control under the hood. I recently changed some hydralic hoses and must have loaded up the system with air. Even with the pump turning, it will not operate the cylinders. For those of you with this type of system, what is the best way to bleed the system of air? Unfortunately, I purcahsed the truck/plow setup used and was not given the manual which may explain the procedure. Thanks to all. Steve.