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 47 of 790
TM 5--2350--378--24&P
0004 00--22
INTRODUCTION TO TROUBLESHOOTING AND REPAIR OF THE M9 ACE HYDRAULIC
SYSTEM -- Continued
0004 00
ACCUMULATOR DUMP VALVE INSTALLATION
Some procedures in the troubleshooting charts require starting and stopping the engine several times. To rapidly
and safely relieve pressure from the main hydraulic accumulator, a dump valve may be installed in the system. If
installing a dump valve, use the procedure described below.
Figure 18. Accumlator Dump Valve Installation
1.
Stop vehicle engine and relieve hydraulic pressure
2.
Remove plug (Figure 18, item 1) and packing (Figure 18, item 2) from port7(Figure 18, item 3) of valve
13R (Figure 18, item 4). Discard packing (Figure 18, item 2).
3.
Install new packing (Figure 18, item 2) and nipple (Figure 18, item 5) in port7(Figure 18, item 3).
4.
Install reducer (Figure 18, item 6) to nipple (Figure 18, item 5).
5.
Connect tube assembly (Figure 18, item 7) to reducer (Figure 18, item 6).
6.
Install two adapters (Figure 18, item 8) on globe valve (Figure 18, item 9), and connect this assembly to
tube (Figure 18, item 7), with arrow of globe valve (Figure 18, item 9) pointed toward port 7 (Figure 18,
item 3).
CAUTION
Make sure globe valve is closed when dump valve is not in use or when engine is
running. Damage to equipment may result.
7.
Connect hose assembly (Figure 18, item 10) to adapter (Figure 18, item 8) at end of globe valve
(Figure 18, item 9).
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