REPAIR FUEL TANK (M577A3 AND M1068A3 ONLY) Continued
Direct carbon dioxide or argon gas into fuel tank (1) at 30-60 cubic feet (0.84-1.68 cubic meters) per hour until gas
escapes from access cover openings.
REPAIR OR REPLACEMENT
Plan to weld on outside of fuel tank, if possible.
Determine type of repair, overlapping or fitted patch.
Resize hole in fuel tank, to remove sharp edges or cracks, for type of patch selected.
Prepare a piece of aluminum of the same alloy and thickness as the fuel tank.
Size patch to cover hole in fuel tank.
Tack weld a small piece of aluminum upright to center of patch to hold patch for welding.
Weld patch to fuel tank. See TM 9-237 and see your -20.
Break support away from patch. Discard support.