TM-5-2350-378-24-P

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

0019 00--9

VEHICLE DOES NOT RESPOND TO DRIVER CONTROLS -- Continued

0019 00

Figure 6. HDC Control Box

Figure 7. DCV Bank

MAIN HYDRAULIC PUMP PRESSURE TEST

WARNING

Before performing any troubleshooting in bowl, move ejector

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

severe injury or death to personnel.

Ensure right main hydraulic pressure inhibit valve V21 is fully

opened prior to starting vehicle. A fully or partially closed valve will

cause immediate high pressure. Failure to comply may result in

damage to equipment and injury or death to personnel.

Stop engine, relieve hydraulic pressure (if not previously done).

Ensure right main hydraulic pressure inhibit valve V21 (Figure 7, item 1) is fully opened.

Reset all HDC solenoid valves by selecting the RESET VALVES button (Figure 6,

item 5) on the HDC control box.

Disable ejector by manually closing the ejector inhibit ball valve V23 (Figure 7, item 2)

on the DCV bank. Using LINE UP or LINE DOWN button (Figure 6, item 3), select V1

on the HDC display (Figure 6, item 2). Close V1 on the HDC display (Figure 6, item 2)

by selecting the CHANGE POSITION button (Figure 6, item 4) on the HDC control box.

Have assistant start engine and allow engine to idle (750--800 rpm). Slowly close right

main hydraulic pressure inhibit valve V21 (Figure 7, item 1) until transducer T--3 on the

HDC display (Figure 6, item 1) indicates 3,950--4,050 psi (27,235--27,925 kPa).

Fully open right main hydraulic pressure inhibit valve V21 (Figure 7, item 1).

Stop engine; relieve hydraulic pressure.

Manually open ejector inhibit ball valve V23 (Figure 7, item 2) on the DCV bank. Ensure

both valves are fully open.

Using LINE UP or LINE DOWN button (Figure 6, item 3), select V1 on the HDC display

(Figure 6, item 2). Open V1 on the HDC display (Figure 6, item 2) by selecting the

CHANGE POSITION button (Figure 6, item 4) on the HDC control box.

TM-5-2350-378-24-P - Page 442 of 790