You should be able to back off the slack adjusters. These are the parts the brake chamber pushrods attach to that rotates the "S" cams to activate the brakes. You want the cams to turn the opposite direction they go when the brake pushrod pushes out of the brake chamber. This will adjust the brakes further from the drums.
You can also disconnect the brake chamber pushrods from the slack adjusters and just rotate them further back toward the brake chamber if you wish, although if you do not have to disassemble that part it is just one more step in the process.
Couple links that may help:
"S" CAM BRAKE DIAGRAM
ROCKWELL SLACK ADJUSTER
I would assume with a Rockwell axle you would have Rockwell slack adjusters, depending on if they have been replaced or not.
Hope this helps out.
Dave / Believer45
You can also disconnect the brake chamber pushrods from the slack adjusters and just rotate them further back toward the brake chamber if you wish, although if you do not have to disassemble that part it is just one more step in the process.
Couple links that may help:
"S" CAM BRAKE DIAGRAM
ROCKWELL SLACK ADJUSTER
I would assume with a Rockwell axle you would have Rockwell slack adjusters, depending on if they have been replaced or not.
Hope this helps out.
Dave / Believer45