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TM 10-4930-241-13
4-19. DISCHAIRGE HOSE ASSEMBLY (4-IN X 50-FT) REPAIR.
To repair the 4-inch X 50 foot discharge hose assembly, refer to para 4-13.
4-20. DISCHARGE HOSE ASSEMBLY (3-IN X 25-FT) REPAIR.
To repair the 3-inch X 25 foot discharge hose assembly, refer to para 4-13.
4-21. REDUCER (3-IN M X 4-IN F) REPAIR.
To repair the 3-inch Male X 4-inch Female reducer, refer to para 4-15.
4-22. BALL VALVE ASSEMBLY (4-INCH) REPAIR
This task covers:
a.
Disassembly
b.
Cleaning
c.
Inspection
d.
Repair
e.
Assembly
INITIAL SETUP:
Tools:
Thread Sealant
(Item 3, App E)
General Mech. Tool Kit
(App B, Sect III, Item 1)
Gasket
(Item 10, App I)
Pipe Wrench
(App B, Sect III, Item 4)
Stem Seal
(Item 21, App I)
Vise
(App B, Sect III, Item 4)
Thrust Bearing
(Item 22, App I) -
Equipment Condition:
Body Seal
(Item 23, App I)
Ball valve assembly removed (para 2-21)
Seat
(Item 24, App I)
Material; Parts:
Cleaning Solvent
(Item 1, App E)
Wiping Rag
(Item 2, App E)
NOTE
Ensure that all parts identified as mandatory replacement parts are discarded and replaced with new
components.
a.
Disassembly. Refer to figure 4-9.
NOTE
Disassemble ball valve assembly only the extent required to replace defective component.
(1)
Disconnect split ring (1), chain (2), and split ring (3) from dust plug (4).
(2)
Remove dust plug (4) from female coupling half (5).
(3)
Remove gasket (6) from female coupling (5).
(4)
Remove female coupling half (5) from ball valve (7).
(5)
Disconnect split ring (8), chain (9) and split ring (10) from dust cap (11).
4-30
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