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TM 10-4930-229-12&P
4-13. Valve Assembly, Butterfly (cont).
(i) Unscrew female coupling half (14) from valve body (10), then remove dust plug (15) and gasket (16).
Discard gasket and remove sealing compound from threads.
(j) unscrew male coupling half (17) from valve body (10), then remove dust cap (18) and gasket (19).
Discard gasket and remove sealing compound from threads.
(k) Remove butterfly (20) from valve body (10).
(l) Replace any parts found to be defective with new parts from stock.
(2) Reassembly.
(a) Install O-ring (13) on shaft (12).
(b) Insert butterfly (20) into valve body (10) and position it so that shaft (12) can be inserted into pivot
point on butterfly (20). Install shaft (12) and secure in housing with pin (11).
(c) Assemble O-ring (9) in valve body (10).
(d) Assemble metallic washer (8) and non-metallic washer (7) and disc (6) on shaft (4).
(e) Insert shaft (4) and assembled washers and disc into valve body (10) to engage butterfly (20).
(f) Secure disc (6) to valve body (10) with two screws (5).
(g) lnstall cap (3) and handle (2) On shaft (4). Ensure handle will operate in Position installed and secure
handle with setscrew (1).
(h) Install new gasket (16) and dust plug (15) into female coupling half (14).
(i) Apply sealing compound to threads and screw female coupling half (14) into inlet side of valve
body (10).
(j) Install new gasket (19) in dust cap (18) and secure on male coupling half (17).
(k) Apply sealing compound to threads and screw male coupling half (17) into outlet side of valve
body (10).
b. Replace (figure 4-4.)
(1) Removal.
(a) Pull up camlock lever rings.
(b) Remove butterfly valve assembly (1) from suction hose assembly (2) and tee assembly (3).
(c) Install dust cap and dust plug. Secure dust cap and dust plug with camlock lever.
4-16
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