TM 5-2350-378-23&P
0016
LEFT REAR CORNER DOES NOT RAISE IN SPRUNG OR UNSPRUNG MODE - Continued
DECISION
YES - Clear blockage or replace manifold.
NO - Replace AFT manifold solenoid valve V4 (WP 0038).
STEP
4.
Perform No. 3 left actuator internal leakage test using HDC (pressure transducer T-7).
a.
Reset all HDC solenoid valves by selecting RESET VALVES button (Figure 3, Item 4) on HDC control
box.
b.
Using LINE UP or LINE DOWN button (Figure 3, Item 2) on HDC control box, select V4 on HDC display
(Figure 3, Item 1).
c.
Using the CHANGE POSITION button (Figure 3, Item 3), close V4 on HDC display (Figure 3, Item 1).
d.
Repeat steps and close V6 and open V18.
e.
Start engine and observe that transducer T-7 hydraulic pressure is greater than 2,500 psi (17,238 kPa).
f.
Less than 2,500 psi (17,238 kPa) indicates leakage from No. 3 left actuator.
g.
Stop engine; relieve hydraulic pressure.
h.
Using LINE UP or LINE DOWN button (Figure 3, Item 2) on HDC control box, select V4 on HDC display
(Figure 3, Item 1).
i.
Using the CHANGE POSITION button (Figure 3, Item 3), open V4 on HDC display (Figure 3, Item 1).
1
2
3
4
T01406HDC
Figure 3. Hydraulic Diagnostic Center (HDC) Control Box.
j.
Repeat steps and open V7 and close V18.
