I couldn't get mine loose seven years ago when I was putting the truck together. I took it to a garage and had them replace the seal. In the mean time I purchased a really cheap 3/4" air unit. I now need a new seal so today I pulled out the 3/4" unit and tried it out. That thing didn't have enough torque to undo a screw in a watch movement! It is a complete piece of junk! I went to the local rental unit and got a 3/4" electric impact gun. It is a Hitachi W-22. The nut came off in a second!
