MWO-5-2350-262-35-4
ARMORED COMBAT EARTHMOVER (ACE), M9
MODIFICATION WORK ORDER
MWO-5-2350-262-35-4 - Page 46 of 207
MWO 5--2350--262--35--4
3--17
SECTION II INSTALLATION OF HDC PRIMARY MANIFOLD ASSEMBLY,
MANUAL SHUT–OFF VALVE V23, AND LEFT MAIN MANIFOLD PRESSURE
TRANSDUCER T7 -- CONTINUED
3--3
PRIMARY MANIFOLD FUNCTIONALITY TESTING -- CONTINUED
b.
Testing hydraulic circuit port 17R to ports 7, 9, 9A and both port 21s.
1. Connect a 28 VDC power supply with the output adjusted to 28 VDC to valve(s) V1, V12, V13,
V19 and V20. Ensure the power supply is turned off at this time.
2. Install --10, 37
_
flare nut caps at port 21 (front and bottom). Also install --8, 37
_
flare nut caps at
ports 9 (front of manifold) and 9A (rear of manifold).
3. Apply hydraulic pressure of 3000 psig (20684.27 kilopascal) @ 10 GPM (37854.12 CPM) to the
--8 hose port 17R (front of manifold).
4. View the other manifold ports to determine if fluid is exiting any ports. If fluid is exiting those
ports, document which ports and stop the testing.
5. View the outputs of pressure transducers T1, T2 and T13. What are the voltages, if any?
Record the voltage readings.
6. Turn the valve V19 power supply on and read the voltage at pressure transducer T13 and T2.
Record the voltages.
7. Turn the valve V20 power supply on and read the voltage at pressure transducer T13 and T2.
Record the voltages.
8. Turn off the valve V19 and V20 power supplies.
9. Remove the hydraulic input pressure from the --8 hose connected to port 17R (front of manifold).
Loosen the --8, 37
_
flare nut cap on port 17R (bottom of manifold) to remove residual pressure.
Re--tighten the --8, 37
_
flare nut cap when pressure and flow have stopped.
10. Remove the --8, 37
_
flare nut cap on port 9A.
11. Apply hydraulic pressure of 3000 psig (20684.27 kilopascal) @ 10 GPM (37854.12 CPM) to the
--8 hose port 17R (front of manifold).
12. View the other manifold ports to determine if fluid is exiting any ports. If fluid is exiting those
ports, document which ports.
13. Remove all 28 VDC connectors from the manifold valves.
14. Turn the valve V19 power supply on and read the voltage at pressure transducer T13 and T2.
Record the voltages. Pressurized fluid should flow from port 9A.
15. Turn the valve V13 power supply on and read the T13 pressure transducer voltage. Record the
voltage reading. Pressurized fluid from port 9A should stop.
16. Turn off the valve V13 power supply. Fluid from port 9A should continue.
17. Turn off the valve V19 power supply.
18. Remove the hydraulic input pressure from the --8 hose connected to port 17R (front of manifold).
There should not be any hydraulic pressure in the manifold.
19. Install --8, 37
_
flare nut cap on port 9A.
20. Remove the --8, 37
_
flare nut cap on port 9.
21. Connect a 28VDC power supply to Valve V12 and valve V19.
22. Apply hydraulic pressure of 3000 psig (20684.27 kilopascal) @ 10 GPM (37854.12 CPM) to the
--8 hose port 17R (front of manifold).
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