TM   5-4220-231-14&P Table 2-2. Operator Preventive Maintenance Checks and Service For   Chamber Operations -  (Con't). B-Before D-During A-After W-Weekly ITEM INTERVAL ITEM   TO    BE   INSPECTED. Equipment Is NO Not    Ready/ B D A W PROCEDURE Available If: WARNING Extreme care must be   exercised when handling pressure gages. Failure    to   keep gages free of oil,   grease, rust, or   contaminants may    cause damage or   inaccurate readings. Failure to observe this warning may result in  equipment failure, injury,    or   death to   personnel. 14 0 0 Gages (14). Inspect for   damaged pointers, Lens is  mis- cracked or   broken lens, missing or   unseated sing or   broken. retaining ring, or   other visible damage. Replace Pointer is  dam- if damaged. aged or pointer is   not calibrated to   0 psig. 0 0 Ensure pointer is   set   to   0   psig. Adjust as required. 0 Monitor gages to   ensure proper pressure ranges Sudden drop during operation. in   pressure affects diver's breathing (EXECUTE EMERGENCY PROCE- DURES, para 2-10). 15 0 Interconnecting hoses and connectors (15). Out    of   date. a) Inspect each hose for   coupling pullout. b) Ensure each hose has a  current clean and hydrostatic test date. 0 0 0 Inspect each hose for   blisters, cuts, abrasions, Any   damage is cracks, or   other damage. Replace if damaged detected. only if replacement during operation does not impact the operation. 0 0 Inspect each connector for   dents, chips, gouges, Damage pre- scratches, or   other visible damage. vents hose from proper seating or   has lost   seal. 2-36