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 40 of 552
TM 9-2350-311-34-2
1-14 LOCATION AND DESCRIPTION OF MAJOR COMPONENTS - CONTINUED
1-14.4 Location and Description of Overall Cab Electrical System - Continued
OVERALL ELECTRICAL SYSTEM BLOCK DIAGRAM, CAB (M109A2/M109A3 HOWITZERS)
NOTE
Some howitzers are only equipped with 3 contact arm assemblies.
LEGEND:
1. Contact arm assembly (3 or 5)
2. Amplifier AM1780/VRC
3. Power relay box assembly
4. Gunner’s selector switch box assembly
5. Pressure switch
6. Power pack assembly
7. Direct current motor
8. Intercom control box C2298/VRC (2)
9.
10.
11.
12.
13.
14.
15.
16.
Elevation selector valve assembly
Assistant gunner’s control handle
M15 elevation quadrant
M117/M117A2 panoramic telescope
M118A2/M118A3 elbow telescope
Traverse mechanism bypass valve assembly
Traverse mechanism clutch
Dome light assemblies (3)
1-20
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