TM-9-2350-311-10
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5
TECHNICAL MANUAL; OPERATOR’S MANUAL
NOVEMBER 1994
TM-9-2350-311-10 - Page 52 of 775
TM 9-2350-311-10
1-11
LOCATION AND DESCRIPTION OF MAJOR COMPONENTS - CONTINUED
1-11.4
Location and Description of Powerplant and Drivetrain Components (LHR Model 7083-7391)
1 RECTIFIER
2 SECONDARY FUEL FILTER
3
TRANSMISSION
3.1 TRANSMISSION AND ENGINE OIL
SAMPLING VALVES
4 ENGINE OIL FILTER
5 PRIMARY FUEL FILTER
6 TRANSMISSION DIPSTICK/FILLER CAP
7 UNIVERSAL JOINT (RIGHT)
8 TRANSMISSION BREATHER
9 COOLANT AERATION DETECTOR
10 BILGE PUMP
11 ENGINE OIL LEVEL GAGE
12 ENGINE OIL FILLER CAP
13 RADIATOR FAN ASSEMBLY
14 SURGE TANK PRESSURE RELIEF
VALVE
15 COOLANT CROSSOVER TUBE
16 RADIATOR
17 RADIATOR FILLER CAP
18 ENGINE COOLANT TEMPERATURE
TRANSMITTER
19 FIXED FIRE EXTINGUISHER NOZZLE
20 ENGINE EXHAUST OUTLET DUCT
21
TURBOCHARGER
22 ENGINE AIR INLET TUBE
23 CYLINDER HEAD ROCKER COVER
(REAR)
24 ENGINE INTAKE AIR BLOWER
25 ENGINE SPEED GOVERNOR
26 EXHAUST CROSSOVER TUBE
27 GLOW PLUG CONTROLLER
1-14 Change 2
Converts generator ac voltage to dc voltage.
Provides additional filtering of fuel.
Receives power from engine and delivers power to drive
sprockets, universal joints, and final drives.
Used for collecting oil samples for AOAP purposes.
Two engine oil filters remove impurities from engine oil.
Provides initial filtering of fuel.
Provides access for adding fluid and checking fluid level.
Receives transmission output power and transfers output to
final drives.
Allows pressure to be vented from the transmission.
Activates low coolant indicator when radiator coolant level
is low.
Pumps fluids from engine compartment.
Used to determine engine oil level.
Permits access for adding engine oil.
Blows cooling air through radiator.
Releases excess pressure that may build in the cooling
system.
Routes engine coolant between bypass and inlet thermostats.
Cools engine coolant.
Provides access for adding engine coolant.
Sensors engine coolant temperature for registering on gages
of driver’s portable instrument panel.
Directs fire extinguishing chemicals into engine compartment.
Channels engine exhaust from engine.
Provides high pressure air to engine intake air blower.
Routes air to engine intake air blower.
Covers engine rockers.
Provides constant volume of air to cylinders.
Controls engine rpm.
Connects left and right exhaust manifolds to provide routing
of exhaust gases.
Provides power for heating glow plugs.
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