TM 10-4610-234-13
4.14
(1) Clamp gate valve body (3) in vise.
(2) Using pipe wrench, unscrew reducer (4) from valve body (3).
(3) Using pipe wrench, unscrew female coupler (2) from valve body (3).
(4) Remove gasket (1) from female coupler (2).
(5) Turn handwheel (6) fully clockwise to close valve.
(6) Remove handwheel nut (5) and handwheel (6) from stem (12).
(7) Using pipe wrench, remove bonnet ring (11) from valve body (3). Lift bonnet (10) and attached
parts from valve body.
(8) Remove disc (13) from stem (12).
(9) Unscrew packing nut (7) from bonnet (10).
(10) Remove packing gland (8) and packing (9) from bonnet (10).
(11) Unscrew stem (12) from bonnet (10).
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 valve body (3) for cracks and stripped or damaged threads.
(2) Inspect disc (13) for cuts or scratches across sealing surfaces.
(3) Inspect bonnet (10) for cracks and stripped threads.
(4) Inspect stem (12) for stripped, galled or damaged threads.
(5) Inspect female coupler (2) for cracks, broken lock arms and damaged threads.
(6) Inspect reducer (4) for cracks and damaged threads.
e. Repair. Replace all defective parts. Do not reuse packing,
f.
Assembly.
(1) Screw stem (12) into bonnet (10).
(2) Install new packing (9) and packing gland (8) in bonnet (10).
(3) Screw packing nut (7) onto bonnet (10) finger tight.
(4) Install disc (13) on stem (12).
(5) Lower bonnet (10) and attached parts onto valve body (3). Install bonnet ring (11) on valve body
(3). Tighten packing nut (7).
(6) Install handwheel (6) and handwheel nut (5) on stem (12).
NOTE
Ensure gasket is fully seated in groove of coupler.
(7) Install gasket (1) in female coupler (2).
(8) Apply anti-seize tape to threads of female coupler (2). Using pipe wrench, screw coupler into
valve body (3).
4-16
Change 2
