SERVICE - TM-10-5430-238-12-P0102

TM 10-5430-238-12&P

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SERVICE

WARNING

Dry cleaning solvent, A-A-59601, used to clean parts, is potentially dangerous to

personnel and property. It produces toxic and flammable fumes. Use only in well

ventilated areas. Avoid repeated and prolonged skin contact. Do not use solvent

near an open flame or near excessive heat. The flash point of the solvent is 100F

to 130F (38 C to 59 C).

1. Clean all parts with dry cleaning solvent and dry thoroughly with rags.

2. Clean all gasket-sealing surfaces thoroughly with detergent and hot water.

3. Inspect all mechanical parts for cracks, dents, breaks, and wear. Replace components if

unserviceable.

4. Polish valve stem (3) with crocus cloth. Coat valve stem (3) with grease.

ASSEMBLY

Gate Valve

1. Thread disk riser (12) into valve stem (3).

2. Check that disk riser (12) is completely secured to bonnet (5).

3. Lay valve body (11) on its side on a clean surface. Position new gasket (15) over disk riser (12).

4. Install disk halves (13) and (14) onto disk riser (12).

5. Insert disk halves (13) and (14) into valve body (11) slot.

6. Place valve body (11) and bonnet (5) in an upright position.

7. Align valve body (11) to gasket (15). Install bonnet (5) assembly to valve body (11) with eight hex-

head cap screws (10), new lockwashers (9), and hex nuts (8).

8. Insert packing ring (16) onto valve stem (3).

9. Insert packing nut (4) onto valve stem (3) by pushing packing nut (4) down on the neck of bonnet (5)

until packing ring (16) is seated in bonnet (5).

10. Remove packing nut (4) from valve stem (3), and assemble gland spring (7) and packing gland (6) to

valve stem (3).

11. Insert packing nut (4), hand-wheel (2), and jam nut (1) onto the valve stem (3).

12. Torque hex-head cap screws (10), lockwashers (9), and hex nuts (8) assembled to the valve body

(11) to 16 ft-lb (21.84 Nm).

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