TM 5-2350-378-23&P
0006
ALL HYDRAULIC FUNCTIONS INOPERATIVE - Continued
1
2
T00406HDC
Figure 4. Directional Control Valve (DCV) Bank.
e.
Using LINE UP or LINE DOWN button (Figure 3, Item 3), select V1 on the HDC display
(Figure 3, Item 2).
f.
Close V1 on the HDC display (Figure 3, Item 2) by selecting CHANGE POSITION button
(Figure 3, 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
pressure on the HDC display (Figure 3, Item 1) indicates 3,950-4,050 psi (27,235-27,925 kPa).
i.
Fully open right main hydraulic pressure inhibit valve V21 (Figure 4, Item 1).
j.
Stop engine; relieve hydraulic pressure.
k.
Open ejector inhibit ball valve V23 (Figure 4, Item 2) on the DCV bank.
l.
Using LINE UP or LINE DOWN button (Figure 3, Item 3), select V1 on the HDC display
(Figure 3, Item 2).
m.
Open V1 on the HDC display (Figure 3, Item 2) by selecting the CHANGE POSITION button
(Figure 3, Item 4) on the HDC control box.
CONDITION/INDICATION
Does main hydraulic pump develop 3,950-4,050 psi (27,235-27,925 kPa)?
DECISION
YES - Go to Step (5).
NO - Replace main hydraulic pump (TM 5-2350-262-20).
