L5WA36 TO Reference 1C-5M-3 (page 5-2).pdf

This technical document is a detailed technical order (TO 1C-5M-3) providing specific instructions for repairing trunnion bearings in two scenarios: bearings that need boring and bearings that do not need boring. The instructions cover precise machining techniques, including:

For trunnion bearings that need boring, the document outlines a step-by-step process for repair, including using a boring tool attached to the MLG support beam, locating the bore's center, carefully reaming the bore (with a caution not to exceed 11.241 inches in diameter), and fabricating a bushing from 7075-T6 AL forging. The procedure includes specific requirements for outside diameter, wall thickness, length, and surface finishing. For trunnion bearings with minor damage not requiring boring, the instructions detail removal/blending of nicks or gouges, surface finishing, eddy current scanning, shot peening, and coating procedures, with material removal restricted to 2 x 6 inches and a maximum diameter of 11.135 inches in any continuous area.