TM 10-4320-317-13
Table 4-6. Troubleshooting Procedures - (Cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6. PRESSURE-REDUCING VALVE ASSEMBLY WILL NOT ALLOW WATER TO FLOW.
WARNING
Assembly may be pressurized. Personal injury may result if pressure is not reduced before
performing maintenance or pressure-reducing valve assembly.
Step 1.
Check isolation tubing for obstructions.
If found, remove obstructions.
Step 2. Close inlet isolation cock valve.
a.
If valve opens, replace regulator control.
b.
If valve remains closed, notify direct support maintenance.
7.
PRESSURE-REDUCING VALVE IS NOT REDUCING PRESSURE.
WARNING
Assembly may be pressurized. Personal injury may result if pressure is not reduced before
performing maintenance or pressure-reducing valve assembly.
Step 1.
Check isolation tubing for obstructions.
If found, remove obstructions.
Step 2.
Ensure that inlet and cover isolation cock valves are open, then dose outlet isolation cock valve.
a.
If main valve closes, replace pressure-reducing control valve.
b.
If main valve opens, notify direct support for diaphragm and spring maintenance.
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