TM 10-5430-236-12&P 0017 00 0017 00-2 TROUBLESHOOTING PROCEDURE TANK VENT FITTING ASSEMBLY SYMPTOM Vent fitting assembly leaks. WARNING To prevent injury to personnel and damage to the equipment, do not open coupling arms when fuel is stored in tank. MALFUNCTION Inspect for distorted, cracked, cut, or missing vent cap gasket. CORRECTIVE ACTION Replace vent cap gasket (WP 0019 00). Inspect for bent or broken vent cap hinge pin. CORRECTIVE ACTION Replace vent cap (WP 0019 00) Check for loose or missing screws on tank coupling half. CORRECTIVE ACTION Replace missing screws and washers (WP 0019 00). Torque screws to 96 inch-pounds (10.84Nm) (WP 0019 00). Remove flanged coupling half from tank (WP 0019 00).  Inspect coupling half for cracks or scratched seating surface.  Inspect preformed packing for cuts, tears, or distortion. CORRECTIVE ACTION Replace coupling half, if damaged (WP 0019 00). Replace preformed packing, if damaged (WP 0019 00). Inspect tank compression fitting for cuts, punctures, elongated holes, and tears. CORRECTIVE ACTION If compression fitting or tank fabric is damaged, replace tank.