TM 9-2350-287-10OPERATING AUXILIARY EQUIPMENT (continued)MaintenanceWARNINGCrewmembers are not authorized to change contaminatedfilters. Changing contaminated filters can result in severeinjury or death to personnel.1 . Notify Unit maintenance to change M12A1 gas filter and/or M13 particulate filter whenone or more of the following conditions are observed:••••••••Physical damageWater immersionLow airflow to face pieces5,000-mile vehicle overhaul (peacetime operation)10,000 hours of vehicle operation (no chemical agents used-wartime operation)1500 hours (approximately five months) of vehicle operation (chemical agentsused-wartime operation)After each CK (cyanogen chloride-a blood agent) attackAt beginning of combat conditions and when use of CK is expected2. Notify Unit maintenance to replace spring clip if:•Clip is missing or damaged•Rubber gasket is missing or does not seal properly[Text Deleted]Change 1 2-203
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