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 308 of 790

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

0016 00--5

HYDRAULIC OIL OVERHEATS -- Continued

0016 00

Figure 3. HDC Control Box

Figure 4. DCV Bank

HDC MANUAL VALVE STATUS CHECK

Check status of manually--operated valves V21 (Figure 4, item 1), V22 (Figure 4,

item 2), and V23 (Figure 4, item 3).

Ensure these manually--operated valves are completely open.

HDC SOLENOID VALVE V19 TEST

Reset all HDC solenoid valves by selecting the RESET VALVES button (Figure 3,

item 5) on the HDC control box.

Start engine and have assistant move SPRUNG/UNSPRUNG lever to SPRUNG mode.

Using LINE UP or LINE DOWN button (Figure 3, item 3), select V5 on the HDC display

(Figure 3, item 2). Close V5 on the HDC display (Figure 3, item 2) by selecting the

CHANGE POSITION button (Figure 3, item 4) on the HDC control box.

Have assistant move SPRUNG/UNSPRUNG lever to UNSPRUNG mode. Read

transducer T--1 hydraulic pressure on the HDC display (Figure 3, item 1).

Using LINE UP or LINE DOWN button (Figure 3, item 3), select V5 on the HDC display

(Figure 3, item 2). Open V5 on the HDC display (Figure 3, item 2) by selecting the

CHANGE POSITION button (Figure 3, item 4) on the HDC control box.

Stop engine; relieve hydraulic pressure.