TM 55-1925-282-14&P
0018 00
8. Remove the seat (figure 8, item 11), and seat O-ring (figure 8, item 12) from the valve body (figure 8, item 5).
Discard the seat and seat O-ring.
9. Remove the first check assembly (figure 8, item 13) and second check assembly (figure 8, item 14) from the
valve body (figure 8, item 5).
NOTE
The check seats are attached to the check cage with a bayonet type locking arrange-
ment. Hold the check cage in one hand while turning the seat clockwise to disassemble
the parts of the check assembly.
The seats and springs of the first and second check assemblies are not interchange-
able. The heavier spring and smaller diameter seat belong with the first check assem-
bly.
10. Hold the check cage in one hand while turning the seat clockwise to separate the parts of the first check
assembly (figure 8, item 13) and the second check assembly (figure 8, item 14).
11. Remove and discard the O-ring seals (figure 8, item 15) and disc assemblies (figure 8, item 16) from the first
check assembly (figure 8, item 13) and second check assembly (figure 8, item 14).
12. Use clean wiping rags and water to clean and remove any debris and foreign matter from the interior of the
valve body (figure 8, item 5), and clean all remaining parts with fresh water.
ASSEMBLY
NOTE
The seats and springs of the first and second check assemblies are not interchange-
able. The heavier spring and smaller diameter seat belong with the first check assem-
bly.
The check seats are attached to the check cage with a bayonet type locking arrange-
ment. Hold the check cage in one hand while turning the seat clockwise to assemble
the parts of the check assembly.
1. Assemble the first check assembly (figure 8, item 13) and second check assembly (figure 8, item 14) using
new O-ring seals (figure 8, item 15) and disc assemblies (figure 8, item 16).
2. Install the first check assembly (figure 8, item 13) and second check assembly (figure 8, item 14) in the valve
body (figure 8, item 5).
3. Install a new seat O-ring (figure 8, item 12) and a new seat (figure 8, item 11) in the valve body (figure 8, item 5).
4. Install the retainer (figure 8, item 10) in the valve body (figure 8, item 5).
5. Install the valve spring (figure 8, item 9) by centering it on the seat (figure 8, item 11) in the valve body (figure 8,
item 5).
6. Assemble the a new diaphragm (figure 8, item 7) and new stem (figure 8, item 8) as an assembly.
7. Install the new stem (figure 8, item 8) and a new diaphragm (figure 8, item 7) in the valve body (figure 8, item 5).
8. Install a new cover O-ring (figure 8, item 6) on the valve cover (figure 8, item 4).
0018 00-10
