SER 3685-A
Mechanical-Metered Control Valve
Revision (11-08)
6
Alemite LLC
Overhaul
Prior to performing any maintenance procedure, the
following safety precautions must be observed. Personal
injury may occur.
WARNING
Do not use halogenated hydrocarbon
solvents such as methylene chloride or 1,1,1-
trichloroethane in this valve. An explosion can
result when aluminum and/or zinc-plated parts in
the valve come in contact with halogenated
hydrocarbon solvents.
Release all pressure within the system prior to
performing any overhaul procedure.
• Disconnect the air supply line from the
pump motor.
• Into an appropriate container, operate the
control valve to discharge remaining
pressure within the system.
Never point a control valve at any portion of your
body or another person. Accidental discharge of
pressure and/or material can result in injury.
Read each step of the instructions carefully.
Make sure a proper understanding is achieved
before proceeding.
Disassembly
NOTE
: Refer to
Figures 2-A
,
2-B
and
3
for component identification on all over-
haul procedures.
Metered Control Valve
NOTE
: The following procedures pertain
to all models of metered control valves.
1. Unscrew the extension assembly from Meter
Assembly (
8
).
2. Separate the components of the extension assembly.
Shroud and Register Assembly
3. Unscrew Screws (
28
) that secure Shroud (
27
) to
Housing (
15
)
• Remove the Shroud from the Housing.
4. Blow low pressure air into the valve’s inlet to rotate
the Outer Pointer to the 11 o’clock position.
5. Turn Outer Pointer (
29
) counterclockwise until the access
hole in the Pointer lines up with the setscrew.
• See
Figure 2-B
inset.
6. Loosen the setscrew that secures the Outer Pointer to
Spindle and Gear Assembly (
14
).
• Remove the Outer Pointer from the Spindle and Gear
Assembly.
7. Remove Inner Pointer (
30
) Dial (
31
) and Cam (
21
) as an
assembly from the Spindle and Gear Assembly.
• Push the Cam Assembly from the Inner Pointer and Dial
to separate components.
8. Carefully remove Spring (
22
) and Roller (
23
) from the
Cam as required.
9. Remove Pointer Gear (
26
) and Washer (
25
) from Register
Assembly (
24
).
10. Remove the Register Assembly from the Housing.
HINT
: Compress the spring with the nylon gear
to clear Worm Gear (
20
).
11. Loosen Setscrew (
19
) that secures Worm Gear (
20
) to the
Spindle and Gear Assembly.
• Remove the Worm Gear from the Spindle and Gear
Assembly.
Metering Mechanism Assembly
12. Unscrew Cap (
10
) from the Housing.
• Remove O-Ring (
11
) from the Cap.
13. Remove Chamber and Piston Assembly (
12
), Planetary
Gear (
13
), and the Spindle and Gear Assembly from the
Housing.
14. Remove Gland Nut (
18
) from the Housing.
• Remove O-Ring (
17
) from the Gland Nut.
15. Remove Washer (
16
) from the Housing.
Inlet Swivel, Valve, and Lever Assembly
16. Unscrew Swivel Assembly (
9
) from Adapter (
32
).
17. Unscrew the Adapter from the Housing.
• Remove O-Ring (
33
) from the Adapter.
18. Remove Screen (
34
), Spring (
35
), Valve Assembly (
36
),
and Valve Sleeve (
37
) from the Housing.
19. Remove Screws (
40
) that secure Lever Assembly (
41
) to
Cam (
39
).
• Remove the Lever Assembly from the Cam.
20. Push the Cam from the Housing.
• Remove Quad Rings (
38
) from the Cam.
1-800-548-1191-http://[email protected]
