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SER 3690-C

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 di 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.

Revision (10-04)

1-800-548-1191-http://[email protected]

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.

Preset Metered Control Valve

Alemite Corporation