Operator Preventive Maintenance Checks and Service For Chamber Operations

TM 5-4220-231-14&P Table 2-2. Operator Preventive Maintenance Checks and Services 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: 4 0 0 Valves (4). Check all valve control knobs for Valve knob is operability. Turn each knob counterclockwise to missing, the open position, and then turn it clockwise to broken or the closed position. Replace control knob if valve missing or broken. operation is jammed, excessively tight, or loose. WARNING Extreme care must be exercised when handling pressure gages. Failure to keep gages free of oil, grease, and rust may cause damage or inaccurate readings. Failure to observe this warning may result in equipment failure, injury, or death to personnel. 5 0 0 Gages (5). Inspect for damaged pointers, Lens is cracked or broken lens, missing or unseated missing or retaining ring, or other visible damage. Replace broken. if damaged. Needle pointer is damaged or not adjusted 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 chamber operations (EXECUTE EMERGENCY PROCE- DURES, para. 2-10). 2-31