On the earlier design trucks, the rear brake rocker arm retracting spring (AA-2523) was located on the outside of the frame. One end of the spring was attached to the rocker arm, the other end was hooked through a hole in the lug on the rear spring shackle bracket.(See Fig. 926.)

On present construction, the retracting spring brackets are welded to the rear radius rods. This method of assembly was found more efficient and at the same time eliminated the lug and hole in the AA-5775 rear spring shackle bracket. If, after present stocks are exhausted, calls are received for the old style shackle brackets, supply the present design.

As the new style brackets do not have the lug and hole in them for attaching the spring, it will be necessary to form a wire loop around the new shackle and insert the end of the spring through the loop, as shown in Fig. 926.