APRON AND LEFT-HAND WHEEL CONTROL INOPERATIVE - Continued
Perform main relief valve pressure test using the HDC.
Before performing any hydraulic troubleshooting in the bowl, move ejector forward and
disable it by disconnecting ejector cylinder from hydraulic system. Failure to comply may
result in severe injury or death to personnel.
Move ejector forward, stop engine, and relieve hydraulic pressure.
Reset all HDC solenoid valves by selecting the RESET VALVES button (Figure 1, Item 5) on the HDC
Figure 1. Hydraulic Diagnostic Center (HDC) Control Box.