SER 3690-C
Preset Metered Control Valve
Revision (10-04)
4
Alemite Corporation
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
c o n t r o l v a l v e t o d i s c h a r g e r e m a i n i n g
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 Figure 2 for component
identification on all overhaul procedures.
Metered Control Valve
NOTE: The following procedures pertain
to all models of metered control valves.
1. Unscrew Extension (2) from the Cap (3).
2. Unscrew Nozzle Assembly (1) from the Extension.
Shroud, Pawl, and Register Assembly
3. Unscrew Screws (26) that secure Shroud (25) to
Housing (8)
• Remove the Shroud from the Housing.
4. Turn Pointer (24) counterclockwise until the access
hole in the Pointer lines up with the setscrew.
• See Figure 2.
5. Loosen the setscrew that secures the Pointer to Spindle and
Gear Assembly (7).
6. Remove Dial (27) Cam (17), and Pointer (24) as an
assembly from the Spindle and Gear Assembly.
7. Carefully pry the Pointer from the Cam Assembly and Dial
to separate components.
8. Remove Springs (18) and Rollers (19) from the Cam.
9. Remove Retaining Ring (15) that secures Lock Pawl (14)
to the Housing.
• Remove the Lock Pawl and Spring (16) from the
Housing.
10. Remove Pointer Gear (23) and Washer (22) from Register
Assembly (20).
11. Loosen Setscrew (12) that secures Worm Gear (13) to the
Spindle and Gear Assembly.
• Remove the Worm Gear from the Spindle and Gear
Assembly.
12. Remove Screws (21) that secure the Register Assembly to
the Housing.
• Remove the Register Assembly from the Housing.
Metering Mechanism Assembly
13. Unscrew Cap (3) from the Housing.
• Remove O-Ring (4) from the Cap.
14. Remove Chamber and Pinion Assembly (5), Planetary
Gear (6), and the Spindle and Gear Assembly from the
Housing.
15. Remove Gland Nut (11) from the Housing.
• Remove O-Ring (10) from the Gland Nut.
16. Remove Washer (9) from the Housing.
Inlet Swivel, Valve, Guard, and Lever Assembly
17. Unscrew Swivel Assembly (35) from Adapter (34).
18. Unscrew the Adapter from the Housing.
• Remove Hand Guard (32) and O-Ring (33) from the
Adapter.
19. Remove Screen (31), Spring (30), Valve Assembly (28),
and Valve Sleeve (29) from the Housing.
20. Remove Screws (38) that secure Lever Assembly (40) and
Lock Bar and Screw Assembly (39) to Cam (37).
• Remove the Lever Assembly and Lock Bar and Screw
Assembly from the Cam.
21. Push the Cam from the Housing.
• Remove Quad Rings (36) from the Cam.
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