Side Block Assembly Maintenance

TM 5-4220-226-14&P 4-13. Side Block Assembly Maintenance - continued. b. Cleaning and Inspection (1) Clean helmet shell with lacquer thinner to remove all traces of silicone sealant. WARNING Remove all traces of lacquer thinner with NID solution and rinse with fresh water. Residual lacquer thinner will contaminate divers air and can cause injury or death. (2) Remove all traces of lacquer thinner from helmet shell with NID solution and soft bristle brush. Wipe clean with lint-free cloths. Rinse with fresh water; air or blow dry. (3) Inspect side block assembly for cracks, stripped threads, or other signs of damage. (4) Inspect bent tube for cracks, major dents, or stripped threads. 4-10