I use a torque doubler. My 3/4" drive deflecting-beam torque wrench measures 30" from the handle pivot to the center of the 3/4" square drive. I acquired a piece of 2" X 1/2" steel flat bar and cut a short 3/4 drive extension into 2 pieces. I welded the female end into a drilled hole in one end, and the male end into the other hole with 30" between them. 300 ft/lbs. indicated on the wrench equals 600 ft/lbs. at the nut. Of course, the wrench is 5 feet long! That's why a 4 foot pipe wrench is needed to hold the yoke. If more torque is needed, I'll just build a longer multiplier.
Jerry
