Getting the tool started correctly is tricky because the pump shaft will rotate more easily than the tool drive hub. But it's critical to NEVER allow the drive hub to spin the pump shaft in relation to the tool shaft because that will UNscrew the tool's stud. I usually hold the pulley and turn the drive hub. Frequently, I back off the drive hub and make sure the tool shaft is still fully threaded onto the stud.

It's easy to press the pulley too far, so check the pump shaft depth as the pulley approches the bracket. The most common setting is for the pulley hub to be flush with the end of the pump shaft, but note this relation BEFORE removing the pulley. If you're not sure and the pump is installed on the engine, sight along the other pullies and adjust this one as needed. If you push it too far, pull it back a little.

Owner caption August 2011 · Photo 3819 of 5000