TM 10-4610-237-12
4.24 GATE VALVE (4-INCH) REPAIR.
This task consists of:
a. Disassembly
b. Cleaning
c. Inspection
d. Repair
e. Assembly
INITIAL SET-UP:
Tools:
Material/Parts:
General Mechanics Tool Kit (Item 1, App. B)
Detergent, General Purpose (Item 1, App. E)
Equipment Condition:
Wiping Rag (Item 2, App. E)
4-inch gate valve assembly removed (para. 4.23 or 4.25)
Tape, Anti-seize (Item 3, App. E)
Packing Ring (Item 15, App. I)
Flange Gasket (Item 16, App. I)
Lockwashers (8) (Item 17, App. I)
NOTE
Ensure that all parts identified as mandatory replacement parts are discarded and replaced with
new components.
a. Disassembly. Refer to Figure 4^14.
(1) Remove nut (1) and handwheel (2) from stem (12).
(2) Remove packing nut (3), gland spring (4), packing gland (5) and packing ring (6) from top of bonnet (10).
(3) Remove eight nuts (7), lockwashers (8), and screws (9) from valve body (17) and bonnet (10).
(4) Remove bonnet (10), gasket (11), and attached parts from valve body (17).
(5) Remove two screws (13) and separate discs (14 and 15) from disc riser (16).
(6) Remove disc riser (16) from stem (12).
(7) Unscrew stem (12) from bottom of bonnet (10).
b. Cleaning.
(1) Wash all components with clean water and detergent.
(2) Rinse components in clean water and dry with wiping rag.
4-46
