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 386 of 790

TM 5--2350--378--24&P

0016 00--83

HYDRAULIC OIL OVERHEATS -- Continued

0016 00

Figure 60. HDC Control Box

SUSPENSION RAISE/LOWER RELIEF VALVE TEST

Reset all HDC solenoid valves by selecting the RESET VALVES button (Figure 60,

item 5) on the HDC control box.

NOTE

This test is done at both the right--hand and left--hand suspension

raise/lower relief valves. For the right--hand valve (port 3R),

actuate the right--hand SUSPENSION CONTROL lever. For the

left--hand valve (port 3L), actuate the left--hand SUSPENSION

CONTROL lever.

For 3R; using LINE UP or LINE DOWN button (Figure 60, item 3), select V15 on the

HDC display (Figure 60, item 2). Close V15 on the HDC display (Figure 60, item 2) by

selecting the CHANGE POSITION button (Figure 60, item 4) on the HDC control box.

Have assistant start engine and move right--hand SUSPENSION CONTROL lever to

RAISE. Read transducer T--1 hydraulic pressure on the HDC display (Figure 60,

item 1).

Using LINE UP or LINE DOWN button (Figure 60, item 3), select V15 on the HDC

display (Figure 60, item 2). Open V15 on the HDC display (Figure 60, item 2) by

selecting the CHANGE POSITION button (Figure 60, item 4) on the HDC control box.

For 3L; repeat the above steps, closing and opening solenoid valve V16 as instructed,

using the left--hand SUSPENSION CONTROL lever, and monitoring the hydraulic

pressure at transducer T--1.