(2) Remove retainer screw (9), spring (10), and detent ball (11).
(3) Remove spring pins (3) from valve body (4).
(4) Remove valve stem (6), valve shaft (13), and preformed packings (5 and 12). Discard preformed
packings.
(5) Remove valve disc (2).
c. Assembly (See Appendix E, Figure 85).
(1) Install valve disc (2), valve shaft (13), valve stem (6), and new preformed packings (5 and 12), and hold
in place with spring pins (3).
(2) Install detent ball (11), spring (10), and retainer screw (9).
(3) Attach valve handle (8) to valve body (4) with screw (7).
d. Installation (See Appendix E ,Figure 85). Install valve assembly (1) with new lockwashers (15), nuts (14) and
screws (16).
4-57. SPRINKLER VALVE MAINTENANCE.
a. Removal (See Appendix F, Figure 86). Disconnect air line and remove coupling (13) and sprinkler valve (1)
from riser pipe.
b. Disassembly (See Appendix F, Figure 86).
(1) Remove thumbscrew (11), nuts (10 and 12), and adjusting band (9).
(2) Remove screws (5), nuts (2), and clamp loop (6).
(3) Separate valve body (8), diaphragm (7), and cover (4).
(4) Remove plug (3) from cover (4).
c. Assembly (See Appendix F, Figure 86).
(1) Install diaphragm (7) and cover (4) in valve body (8), and secure with clamp loop (6), screws (5), and
nuts (2).
(2) Install plug (3) in cover (4).
(3) Attach adjusting band (9) to valve body (8) with thumbscrew (11) and nuts (10 and 12).
d. Installation (See Appendix F, Figure 86).
(1) Install sprinkler valve (1) on riser pipe with coupling (13).
(2) Connect air line to sprinkler valve.
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