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 36 of 552
TM 9-2350-311-34-2
1-14 LOCATION AND DESCRIPTION OF MAJOR COMPONENTS - CONTINUED
1-14.3 Location and Description of Cab Hydraulic Systems
The elevating system, traversing system, and projectile rammer hydraulic systems are supplied with pressurized hydraulic
fluid by power pack assembly (1). The top part of the power pack assembly is a power pack hydraulic fluid reservoir which
contains a hydraulic rotary pump driven by a direct current motor in the base of the power pack assembly. Immediately next
tothepowerpackassembly is the main accumulator (2) which ensures constant hydraulic pressure during operation of any
hydraulic system.
a.
Elevating System. The elevating system is used to elevate, depress, and balance the cannon. It maybe controlled
from either gunner’s control assembly (3) or assistant gunner’s control assembly (4). The elevating system consists of
equilibrated elevating cylinder (5), primary accumulator (6), secondary accumulator (7), elevation selector valve as-
sembly (8), and hand pump (9) for adjusting balance of the equilibrated elevating cylinder. The manual elevating hand
pump (10) mounted on assistant gunner’s control assembly provides ability to operate elevating system in the event of
hydraulic power failure.
1-16
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