P64.20-3689-09
1 Grind mating surfaces down to bare metal A1 to E2 on one side.
2 Drill holes for plug welds in areas F1 to G2 and grind down to bare metal on both sides.
P64.20-3690-04
3 Grind spot weld flanges in areas H1 to K down to bare metal on both sides. Coat inside of spot welding flanges with zinc dust paint.