TM-9-2350-311-20-2 Maintenance Manual Volume 2 for M109 Cab Download
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TM 9--2350--311--20--2 2--31 Table 2-2. PREVENTIVE MAINTENANCE CHECKS AND SERVICES FOR M109 SELF- PROPELLED HOWITZER -- CONTINUED Location Item No. Not Fully Mission Capable if: Procedure Item to Check/Service Interval 15 Annually NBC Equipment (M109A4/M109A5 Howitzers Only) -- Continued a. Inspect M2A2 air purifier (1) for dents, loose connections, and missing parts. Notify support maintenance if any damage is detected. b. Perform airflow check at each station using M39 airflow tester (TM 3--6680--316--10). c. Inspect condition of hose assemblies (2). Check for deterioration, loose con- nections, holes, tears, and other dam- age (para 17--5). Check that air moves through all orifice connectors (3) when system is on. NOTE Allow M3 electrical air heater to oper- ate for approximately 15 minutes be- fore checking for warm air. d. Check operation of M3 electrical air heater (4) by turning control knob (5) on. NBC indicator should light and air should get warmer as control knob is turned clockwise. e. Troubleshoot NBC system if defective (para 3--3j.). 1 3 2 4 5