Graco 238890 Service Kits, Installing the Air-Operated Conversion Kit, Relieve the pressure

Service

Service Kits

For the Fluid Diaphragm Repair Kit, order Part 238747. Parts included in this kit are marked with an asterisk, for example (7*), in the Parts Drawings and Lists on pages 14 and 16.

For the Cartridge Repair Kit, order Part 238748 for all models except 248090. Parts included in this kit are marked with a dagger, for example (3{), in the Parts Drawings and Lists on pages 14 and 16.

For the Cartridge Repair Kit for 248090, order Part 248098. Parts included in this kit are marked with a checkmark, for example (3n), in the Parts Drawings and Lists on pages 14 and 16.

To convert from a spring-operated to an air-operated regulator, order the Air-Operated Conversion Kit, Part 238749. Parts included in this kit are marked with a double dagger, for example (37}), in the Parts Drawings and Lists on pages 14 and 16.

NOTE: To convert from a medium-pressure-range, spring-operated model to a high-pressure-range, spring-operated model (or vice versa), order the appropriate spring (11) from the Parts List on page 15.

Installing the Air-Operated Conversion Kit

(See Parts Drawings on pages 14–16)

1.Relieve the pressure.

WARNING

To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 7.

2.On the spring-operated regulator, turn the adjusting screw (10) counterclockwise until it is loose enough to fully relieve the spring tension.

3.Use a strap wrench or an equivalent wrench to loosen and remove the spring cover (2), spring retainers (6 and 27), and spring (11).

4.Place the stabilizing spring (22) of the air-operated regulator on the piston rod (6). Install the conversion kit assembly onto the backing plate (8). Torque to 15 to 20 ft-lb (20 to 27 NSm).

5.Plumb an air line up to the 1/4 npt(m) threads of the nipple (35) on the air regulator.

6.Flush the system (see page 9), and set the regulator pressure by following the procedure in Adjusting the System Pressure on page 8.

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