TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
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TM 9-2350-311-20-1 1-17 EQUIPMENT OPERATION AND DESCRIPTION — CONTINUED 1-17.7 Instrument Panels The M109A2/M109A3/M109A4/M109A5 Howitzers have two instrument panels. 1-17.7.1 The portable instrument panel (1) consists of the following: a. b. c. d. e. f. g. h. i. MASTER switch (2) — activates the vehicle electrical system. MASTER WARNING light (3) — indicates critical engine operating conditions for transmission oil low pressure, transmission oil high temperature, engine coolant high temperature, and engine oil low temperature. WATER TEMP gage (4) — indicates engine water temperature. ENGINE OIL PRESSURE gage (5) — indicates engine oil pressure. FUEL gage (6) — indicates fuel level. TRANSMISSION OIL TEMP gage (7) — indicates transmission oil temperature. TRANSMISSION OIL PRESSURE gage (8) — indicates transmission oil pressure. BATTERY gage (9) — indicates battery condition. COOLANT warning indicator lamp (10) — indicates low coolant. 1-28