@mayorrichard The wrench is a semicircle with a tooth on the end which fits into the notched adjustment nut on the end of the bushing. I am out of town, but when I get home in a few days I will post a picture of the tool and the part number. The amount of adjustment you can get depends on where it is when you start. I have seen them adjusted too far in one or the other direction which can ruin the rubber seals.