TM 10-4610-243-13
4-31. GATE VALVE ASSEMBLY (4-INCH) REPAIR.
This task consists of:
a.
Disassembly
b.
Cleaning
c.
Inspection
d.
Repair
e.
Assembly
INITIAL SET-UP :
Tools:
Tape, Anti-seize (Item 3, Appendix E)
General Mechanics Tool Kit (Item 1, App B)
Gasket (2) (Item 4, App I)
Equipment Condition:
Gasket (3) (Item 10, App I)
4-inch gate valve assembly removed (para 3-4a)
Lockwasher (24) (Item 11, App I)
Material/Parts:
Packing Ring (Item 28, App l)
Detergent, General Purpose (Item 1, App E)
Flange Gasket (Item 29, App I)
Wiping Rag (Item 2, App E)
Lockwasher (8) (Item 30, App I)
NOTE
Ensure that all parts identified as mandatory replacement parts are
discarded and replaced with new components.
a.
Disassembly.
Remove gate valve. Refer to figure 4-27.
(1)
Disconnect ring (1) from male coupling (9) and remove cap (3).
(2)
Remove gasket (2) from cap (3).
(3)
Remove eight nuts (4), lockwashers (5), flat washers (6), screws (7) and ten flat washers (8).
(4)
Separate male coupling (9) and gasket (10) from gate valve (21).
(5)
Disconnect ring (11) from female coupling (19) and remove plug (12).
(6)
Remove gasket (13) from female coupling (19).
(7)
Remove eight nuts (14), lockwashers (15), flat washers (16), screws (17) and ten flat washers (18).
(8)
Separate female coupling (19) and gasket (20) from gate valve (21).
Disassemble gate valve. Refer to figure 4-28.
(9)
Remove nut (1) and handwheel (2) from stem (12).
(10)
Remove packing nut (3), gland spring (4), packing gland (5) and packing ring (6) from top of bonnet (10)
(11)
Remove eight nuts (7), lockwashers (8), and screws (9) and ten flat washers (18) from valve body (17)
and bonnet (10).
4-84
