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TM 10-5430-1232-12&P
REMOVAL (see figure 4-13)
1 Remove jam nut (1) from top of handwheel (2).
2 Remove handwheel (2) from top of valve stem (3).
3 Remove packing nut (4), spring (5) and packing gland (6).
4 Remove 1 0 bolts (7), lockwashers (8) and nuts(9) from valve assembly.
5 Lift valve from valve housing (10).
6 Remove bonnet gasket (11) from bonnet (12).
NOTE
The packing should be removed only when It Is to be replaced.
SERVICE
WARNING
Cleaning solvent, P-D-680, 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 near an
open flame or, excessive heat. The flash point of solvent Is 100°F to 138°F (38
C
to 59
C).
1 Clean all parts with cleaning solvent and dry thoroughly.
2 Clean all gasket surfaces thoroughly with cleaning compound and hot water.
3 Inspect all mechanical parts for cracks, dents, breaks, or wear. Replace or repair if unserviceable.
4 Carefully inspect gasket for deterioration, distortion, cracks, or breaks. Replace when service is
doubtful.
5 Polish bonnet stem with a crocus cloth; then coat with grease.
ASSEMBLY (see figure 4-13)
1 Install bonnet gasket (11) onto valve housing (10). Bring valve housing (l) and bonnet (12) to
erect position.
2 Align screw holes and bonnet gasket (11) holes; install 10 bolts (7), lockwashers (8), and nuts
(9) until finger-tight. Using 10 bolt torquing pattern, torque to 10 ft. Ibs (14 Nm).
3 Install packing nut (4) on valve stem (3); manually push packing nut down on neck of bonnet.
4 Remove packing nut (4); install gland spring (5) and packing gland (6) on valve stem,
Change1 4-26
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