HYDRAULIC OIL OVERHEATS - Continued
Perform Hydraulic Diagnostic Center (HDC) manual valve status check. Ensure that manually-operated HDC
valves V21, V22, and V23 are open.
Check status of manually-operated valves V21 (Figure 1, Item 1), V22 (Figure 1, Item 2), and V23
(Figure 1, Item 3).
Figure 1. Directional Control Valve (DCV) Bank.
Ensure these manually-operated valves are completely open.
Are all manual valves open?
YES - Go to Step (2).
NO - Open valves.
Reset all HDC solenoid valves by selecting RESET VALVES button (Figure 2, Item 5) on HDC control
Start engine and have assistant move SPRUNG/UNSPRUNG lever to SPRUNG mode.
Using LINE UP or LINE DOWN button (Figure 2, Item 3), select V5 on HDC display (Figure 2, Item 2).
Close V5 on HDC display (Figure 2, Item 2) by selecting CHANGE POSITION button (Figure 2, Item 4)
on HDC control box.
Have assistant move SPRUNG/UNSPRUNG lever to UNSPRUNG mode.
Read transducer T-1 hydraulic pressure on HDC display (Figure 2, Item 1).