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 366 of 790

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

0016 00--63

HYDRAULIC OIL OVERHEATS -- Continued

0016 00

Figure 47. Apron Control Valve

APRON RELIEF VALVE PRESSURE TEST

WARNING

Before performing any hydraulic troubleshooting in bowl, move

ejector forward and engage the ejector lock. Failure to comply may

result in severe injury or death to personnel.

NOTE

Have suitable container ready to catch oil.

Start engine, move ejector forward, engage ejector lock.

Stop engine; relieve hydraulic pressure.

Disconnect CONT VLV--20 hose (Figure 47, item 5) from elbow (Figure 47, item 1) at

port 20 of apron control valve. Connect pressure measuring device (Figure 47, item 2)

to elbow (Figure 47, item 1). Plug hose (Figure 47, item 5).

Have assistant start engine and hold APRON CONTROL lever in DOWN position. Read

pressure measuring device (Figure 47, item 2).

APRON RELIEF VALVE ADJUSTMENT

As assistant holds APRON CONTROL lever DOWN, loosen jam nut (Figure 47, item 3)

and rotate adjusting screw (Figure 47, item 4) clockwise to increase pressure;

counterclockwise to decrease pressure. When adjustment is completed, tighten jam nut

(Figure 47, item 3).

Stop engine; relieve hydraulic pressure.