TM-9-2350-311-34-2
CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS HOWITZER, MEDIUM, SELF-PROPELLED, 155MM
TECHNICAL MANUAL; DIRECT AND GENERAL SUPPORT MAINTENANCE MANUAL
SEPTEMBER 1994
TM-9-2350-311-34-2 - Page 51 of 552
TM 9-2350-311-34-2
1-14.12 Location and Description of Commander’s Cupola
The hatch cover (1) of the commander’s cupola is hinged on the side opposite the machine gun support assembly (2) and
counterbalanced with a torsion bar (3) for ease of opening. A spring-loaded latch (4) holds the hatch cover in full open
position and creates a positive lock in closed position. Cupola body assembly (5) is supported by a mechanism of bearing
rings (6) and bearing balls to permit easy 360° manual traverse. A spring-loaded latch (7) can lock commander’s cupola in
traverse at intervals of 30° around the circle. A periscope slot (8) at the front of the commander’s cupola permits mounting
of a periscope for observation by the commander.
COMMANDER’S CUPOLA WITH OUTSIDE LATCH (SOME M109A3/M109A4/M109A5 HOWITZERS)
COMMANDER’S CUPOLA WITHOUT OUTSIDE LATCH
(ALL M109A2 AND SOME M109A3/M109A4/M109A5 HOWITZERS)
Change 2 1-31
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