Turn all adjusters clockwise to adjust shoes out. This is clockwise when looking at each end of the brake cylinder. This means the adjustment wheel turns up at the end of each brake cylinder toward the front of the truck and down at the back.
I prefer to use a large flat screwdriver for the adjustment. Lift the truck so you have room to work, and use a good light so you can see the notched wheel. You do not have to remove the spring lock. Use care, it is possible to destroy the notched wheel.
Expand the shoes (using the adjuster on both ends of each cylinder) until the tire can no longer be turned, then back off the adjuster about 4-6 clicks and the tire very slightly drags when turned.
