TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
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TM 9-2350-311 -20-1 (3) DRIVER’S NBC HEATER FAILS TO OPERATE; PURIFIER AND CANNONEER NO. 2 NBC HEATER OPERATE PROPERLY General mechanic’s tool kit (item 64, Appx H) Multimeter (item 36, Appx H) TA-1 probe kit (item 43, Appx H) A I 1. Disconnect lead 4396 from driver’s NBC heater. 2. Place red lead of multimeter in lead 4396 and black lead to ground. 3 Turn MASTER and NBC switches ON and check for voltage. 4. Turn MASTER-and NBC switches OFF. , , Is voltage present? I 1 Repair or replace lead 4396 of ventilated face piece system power wiring harness (para 8-62). [ Replace driver’s NBC heater (para 12-3). I END OF TASK 3-347 INITIAL SETUP Tools