TM 5-2350-378-23&P
0018
VEHICLE DOES NOT RESPOND TO OPERATOR CONTROLS - Continued
STEP
4.
Perform main hydraulic pump pressure test using Hydraulic Diagnostic Center (HDC).
WARNING
Before performing any troubleshooting in bowl, move ejector forward and engage
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 to personnel.
a.
Stop engine; relieve hydraulic pressure (if not previously done).
b.
Ensure right main hydraulic pressure inhibit valve V21 (Figure 4, Item 1) is fully opened.
c.
Reset all HDC solenoid valves by selecting RESET VALVES button (Figure 5, Item 5) on HDC control
box.
d.
Disable ejector by manually closing ejector inhibit ball valve V23 (Figure 4, Item 2) on DCV bank.
1
2
T01607HDC
Figure 4.
No. 4 Left Actuator.
e.
Using LINE UP or LINE DOWN button (Figure 5, Item 3), select V1 on HDC display (Figure 5, Item 2).
f.
Close V1 on HDC display (Figure 5, Item 2) by selecting CHANGE POSITION button (Figure 5, Item 4)
on HDC control box.
g.
Have assistant start engine and allow engine to idle (750-800 rpm).
h.
Slowly close right main hydraulic pressure inhibit valve V21 (Figure 4, Item 1) until transducer T-3 on
HDC display (Figure 5, Item 1) indicates 3,950-4,050 psi (27,235-27,925 kPa).
