A. Place the engine on the upper quarter on the side with the loose
wedge. Do not set the brake if brake shoe will push the driving box
against the defective wedge, but block engine truck wheels so the engine
cannot move, push the boxes against the shoe or dead wedge with a little
steam, set the wedge up until it is a snug fit, then pull it down about
one-sixteenth of an inch and fasten. Provision should be made for
expansion of the box when it gets warm.