TM 10-4610-237-12
4.21 CHECK VALVE ASSEMBLY (2-INCH) REPAIR - Continued .
a.
Disassembly. Refer to Figure 4-11.
(1)
Disconnect split ring (1) from female coupling (2) and remove dust plug (3).
(2)
Disconnect split ring (4) from male coupling (5) and remove dust cap (6).
(3)
Remove gasket (7) from dust cap (6).
(4)
Remove gasket (8) from female coupling (2).
(5)
Place check valve assembly in vice.
(6)
Remove male coupling (5) from assembly valve (9).
(7)
Remove female coupling (2) from assembled valve (9).
(8)
Remove cap (10) from body (16).
(9)
Remove plug (11) from body (16).
(10)
Pull pin (12) out from body (16) and lift out lever (14) and attached parts.
(11)
Remove nut (13) and separate disc (15) from lever (14).
b.
Cleaning.
(1) Wash all components with clean water and detergent.
(2) Rinse components in clean water and dry with wiping rag.
c.
Inspection.
(1)
Inspect body (16), male coupling (5), dust cap (6), cap (10) and plug (11) for cracks, corrosion and
stripped or damaged threads.
(2)
Inspect female coupling (2) and dust plug (3) for cracks, corrosion, and damaged locking arms.
(3)
Inspect disc (15) for cracks, distortion and scored sealing surface.
d.
Repair. Replace damaged parts. Do not reuse gasket(s) (7 and 8).
4-38
