TM-9-2350-311-20-1

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS

AUGUST 1994
TM-9-2350-311-20-1

  TM-9-2350-311-20-1 - Page 42 of 1275

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


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