TM 10-4320-303-13
4.10.2 6 Inch Butterfly Valve Assembly Maintenance . (Continued)
d. Inspect all mounting hardware for corrosion or damage.
4.10.2.4 Repair. Repair consists of replacing all damaged or defective components.
4.10.2.5 Assembly.
a. Install upper stem (16) in upper housing (6).
b. Install new preformed packing (15) and washer (14) on upper stem (16).
c. Install disc (13) in body (12). Ensure holes in top and bottom of disc (13) are aligned with holes in top and
bottom of body (12).
d. Install body (12) in upper housing (6). Ensure upper stem (16) is inserted through body (12) and installed
securely in upper mounting hole of disc (13).
e. Install new preformed packing (11) and lower stem (10) in lower housing (9).
f. Install lower housing (9) on body (12) and upper housing (6) assembly. Ensure lower stem (10) is inserted
through body (12) and installed securely in mounting lower hole of disc (13).
g. Carefully align upper housing (6) and lower housing (9) and install two bolts (8) and nuts (7). Tighten nuts
(7).
h. Place mounting plate (4) on upper housing (6). Install two screws (5). Tighten screws (5).
i. Install handle assembly (3) on mounting plate (4).
j. Install two new lock washers (2) and bolts (1). Tighten bolts (1).
4.10.2.6 Installation.
a. Install 6 inch butterfly valve assembly (Figure 4-3, 2) next to 6 inch X 20 foot hose assembly (3) and lateral
grooved pipe fitting (4).
b. Install two grooved-end pipe quick-disconnect coupling clamps (1) securing 6 inch butterfly valve assembly
(2) to 6 inch X 20 foot hose assembly (3) and lateral grooved pipe fitting (4).
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