What size spindle wrench is required to remove the pad on the Porter Cable right angle random orbit sanders and polishers? Support April 07, 2021 15:05 Updated The spindle wrench is a 9/16" open end. The service part number for this wrench is 692900. Related articles What causes swirl marks? What are the opm(orbits per minute)\rpms(revolutions per minute) of each speed on the 7424? Where can I find a service center to repair my tools? How do I tighten the blade height adjustment? 3812 bench table saw My pressure washer works fine until I release the trigger and the engine bogs down and stops. What is causing this and how can I fix it? Comments 0 comments Please sign in to leave a comment.