TM 10-4320-303-13
Figure 4-4. 6 Inch Butterfly Valve Assembly Disassembly.
b. Remove two screws (5) and remove mounting plate (4) from upper housing (6).
c. Remove two nuts (7) and bolts (8).
d. Carefully separate upper housing (6) and lower housing (9).
e. Remove lower stem (10) and preformed packing (11) from lower housing (9). Discard preformed packing
(11).
f. Remove body (12) from upper housing (6).
g. Remove disc (13) from body (12).
h. Remove washer (14) and preformed packing (15) from upper stem (16). Discard preformed packing (15).
i. Remove upper stem (16) from upper housing (6).
4.10.2.3 Inspection.
a. Inspect handle assembly (3) for cracks, damage, and smooth operation of handle.
b. Inspect mounting plate (4), upper housing (6) and lower housing (9) for cracks, holes, or damage.
c. Inspect lower stem (10), body (12), disc (13), and upper stem (16) for corrosion, cracks, holes, or damage.
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