TM 10-4320-303-13
4.11.5 Pressure Reducing Valve Assembly Maintenance. (Continued)
d. Remove isolation cock valve (5).
e. Remove elbow (6) from reducer (7).
f. Remove reducer (7) from body of main valve assembly (2).
g. Remove tubing (8).
h. Remove elbow (9) from isolation cock valve (10).
i. Remove isolation cock valve (10) from reducer (11).
j. Remove reducer (11) from cover of main valve assembly (2).
k. Remove reducer (12) and elbow (13) from pipe tee (14).
l. Remove pipe tee (14) from main valve assembly (15).
m. Remove pressure-reducing control assembly (15).
n. Remove pipe nipple (16) from isolation cock valve (17).
o. Remove isolation cock valve (17).
p. Remove pipe nipple (18) from elbow (19).
q. Remove elbow (19) from reducer (20).
r. Remove reducer (20) from body of main valve assembly (2).
4.11.5.2 Inspection.
a. Inspect main valve assembly (Figure 4-10, 2) for evidence of leaks, cracks, holes, missing
components, or damage.
b. Inspect mounting brackets (3) and skid assembly (7) for cracks, bends, holes, or damage.
c. Return damaged or defective main valve assembly (2) and skid assembly (7) to direct support
maintenance.
d. Replace all damaged mounting hardware and mounting brackets (3).
e. Inspect all tubing (Figure 4-11, 3 and 8), reducers (4, 7, 11, 12, and 20), elbows (6, 9, 13, and 19),
pipe tee (14), and pipe nipples (16 and 18) for corrosion, cracks, and damage.
f. Inspect isolation cock valves (5, 10, and 17) for corrosion, cracks, smooth operation of handle, and
damage.
g. Inspect pressure-reducing control (15) for cracks, holes, missing components and damage. Return
damaged or defective pressure-reducing control (15) to direct support maintenance.
h. Replace all damaged or defective components.
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