TM-5-2350-378-24-P
HYDRAULIC DIAGNOSTIC CENTER (HDC) SUPPORTING ARMORED COMBAT EARTHMOVER (ACE), M9
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST
TM-5-2350-378-24-P - Page 50 of 790
TM 5--2350--378--24&P
0004 00--25
INTRODUCTION TO TROUBLESHOOTING AND REPAIR OF THE M9 ACE HYDRAULIC
SYSTEM -- Continued
0004 00
ACTUATOR PORT IDENTIFICATION AND DESCRIPTION
Figure 21. Actuator Port Identification
Table 1. Actuator Port Description
Port
Description
1
Actuator accumulator to wheel valve and leveling dump valve.
2
External port and passage to wheel valve and actuator shaft vanes (pressurized to raise vehicle).
3
External port and passage to wheel valve (pressurized to raise vehicle when in UNSPRUNG mode).
4
Internal passage from leveling dump valve to wheel valve (see next page).
7
External port for relief valve outlet flow.
7A
External port and passage from wheel valve (carries leveling dump valve flow when vehicle is in
SPRUNG mode).
7B
External port and passage from drain chamber.
8
External port and auxiliary passage to actuator accumulator from port 9.
9
External port and passage through leveling fill valve to actuator accumulator (pressurized to charge
accumulator when leveling fill valve is held open by cam).
11
External port and passage to wheel valve (pressurized to shift wheel valve into UNSPRUNG mode).
14
External port and axillary passage to actuator accumulator.
17
External port and passages to actuator shaft vanes (pressurized to lower vehicle when in UNSPRUNG
mode, and is return line passage when raising vehicle in both SPRUNG and UNSPRUNG modes).
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