TM 10-4610-234-13
4.24
GATE VALVE ASSEMBLY (4-INCH) MAINTENANCE - continued.
c. Cleaning.
(1) Clean all components with clean water and detergent.
(2) Rinse components in clean water and dry with wiping rag.
d. Inspection.
(1) Inspect bonnet (8), valve body (15) and flanged couplings (17and27) for cracks, scored mating
surfaces, stripped threads and corrosion.
(2) Inspect for bent stem (10). Inspect for galled or stripped threads.
(3) Inspect sealing surfaces of discs (12 and 14) for deep scratches and cracks.
e. Repair. Replace damaged parts and all sealing components.
f. Assembly.
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
Screw stem (10) into bonnet (8).
Install disc riser (11 ) on stem (10).
Install discs (12 and 14) on riser (11) with two screws (13).
Turn stem (10) counterclockwise until discs (12 and 14) retract into bonnet (8).
Position gasket (9) on valve body (15). Guide bonnet (8) and attached parts onto valve body.
Install eight botts (7), lockwashers (30) and nuts (29).
Install gasket (26) in flanged coupling (27).
Position flanged coupling (27) and gasket (28) on valve body (15).
Install eight bolts (25), washers (24), lockwashers (22) and nuts (20).
Position flanged coupling (17) and gasket (16) on valve body (1 5).
Install eight bolts (18), washers (19), lockwashers (21) and nuts (23).
g. Installation. Connect gate valve to water system (refer to para. 2.10 to connect couplings).
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