TM 10-5430-243-12&P 0021 000021 00-4 9. Rotate valve stem (3) clockwise, and disassemble valve stem (3) from the bottom side of bonnet (5). NOTE The packing ring should be removed only when it is to be replaced. 10. Drive packing ring (16) through the bottom of bonnet (5). SERVICE 1. Clean all parts with detergent and warm water. 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 excessive 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 bonnet 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 bonnet 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 (21.70 Nm).
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