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 96 of 775
TM 9-2350-311-10
2–1 OPERATOR’S CONTROLS, INDICATORS, AND INSTRUMENTS — CONTINUED
2–1.4
Crew Controls and Instruments — Continued
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CAM ASSEMBLY
M146 TELESCOPE MOUNT
M118A2/M118A3 ELBOW TELESCOPE
M15 ELEVATION QUADRANT
REPLENISHER ACCUMULATOR
ASSEMBLY PRESSURE GAGE
COLLIMATOR STORAGE CONTAINER
HAND PUMP CRANK
ASSISTANT GUNNER’S CONTROL
ASSEMBLY HANDLE
AIR CLEANER LATCH
AIR CLEANER INDICATOR
PERSONNEL AIR VENTILATION
BLOWER
Holds breech in open position.
Provides an adjustable support for the M118A2/M118A3 elbow
telescope.
Direct fire instrument used for positioning the weapon in azi-
muth and elevation on targets visible from the weapon.
Provides the means for laying the weapon in elevation for indi-
rect firing.
Indicates hydraulic pressure.
Stores M1A1 collimator which is used for laying of the weapon.
Allows assistant gunner to manually elevate the cannon tube.
Allows assistant gunner to elevate and depress the cannon
tube.
Opens door allowing access to filters.
Alerts crew of air flow restriction in air cleaner.
Provides ventilation to crew compartment,
2-12
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