TM 55-1930-209-14&P-19 Table 17-4.  Preventive Maintenance Checks and Services for Workboat, Lifesaving, and Firefighting System (Continued) B - Before D - Daily Q -  Quarterly D - During W - Weekly S -  Semiannually A - After M - Monthly A -  Annually INTERVAL ITEM PROCEDURES EQUIPMENT ITEM TO BE CHECK FOR AND HAVE IS NOT READY/ NO. INSPECTED REPAIRED OR ADJUSTED AVAILABLE IF B   D   A   D  W  M   Q   S   A AS NECESSARY 2) Ultralite Mask. Release the cylinder clamp drawbolt and remove the cylin- der. · h. Ultralite Cub: 1) Replace depleted cylinder with a fully Cylinder not charged cylinder. Slide cylinder, valve charged. end first, through the band. Place spacer, without D-ring, of metal frame assembly in line with pressure gauge on cylinder; tighten screw on band. Connect with hand tight coupling nut at the cylinder valve. 2) Ultralite Mask: Replace depleted cylin- Cylinder not der with a fully charged cylinder and charged. connect the hand tight coupling nut at the cylinder valve. CAUTION Cleaning and sanitizing at the recom- mended 120 oF temperature will avoid unneccessary replacement. Overheating and resulting distortion of parts of the res- pirator would necessitate replacement. i. Remove the facepiece assembly and clean and sanitize it with MSA Cleaner- Sanitizer (Pt. No. 34337). 1) Add one package (1 oz) of powered Cleaner-Sanitizer to a gallon of warm water (about 120 oF). 2) Immerse facepiece and tube in the solution and scrub gently until clean. 3) Rinse in clean warm water and allow to air dry by removing the regulator cap, spring, and diaphragm. Use a paper towel or dry cloth to dry the low pressure side of the regulator. Do not bend lever assembly arms. 17-30