Magnet when energized is attracted to face surface of drum and as drum rotates (froward/reverse) the magnet moves with drum causing the actuating lever to rotate which causes brake shoes to move outward making contact with drum.
If you are the original owner them Gulfstream made a bo-bo at factory.
2" shackles and 1 3/4" leaf spring packs should not have been used together.
Bottom portion of shackle should mate flush/parallel with ends of spring eyes
IF not original owner.......possible springs have been previously replaced with wrong size
In either case........you need a spacers (thick washers) preferably on each side of spring eyes.
