Graco Inc 309475F important safety instructions Maintenance, Flushing, Cleaning and Repair

Maintenance

Maintenance

Flushing

WARNING

The system pressure must be manually relieved to prevent the system from starting or spraying acciden- tally. Fluid under high pressure can be injected through the skin and cause serious injury. To reduce the risk of an injury from fluid injection, splashing fluid, or moving parts, follow the Pressure Relief Proce- dure whenever you:

•are instructed to relieve the pressure

•stop spraying

•check or service any of the system equipment

•or install or clean the spray tip.

1.Relieve the pressure.

2.Remove the spray tip. Clean the tip and set it aside.

3.Supply solvent to the pump. Start the pump. Use the lowest possible fluid pressure when flushing.

4.Flush the gun, spraying into a grounded metal con- tainer until clean solvent comes from the gun.

5.Relieve the pressure.

6.Reinstall the spray tip.

Do not allow paint or solvent to sit in the system for extended periods. Fluid could dry on the plunger and cause leakage at the plunger packings. If leakage occurs, disassemble and clean the regulator.

Cleaning and Repair

When changing fluids or colors, the regulator should be disassembled and cleaned. Regular cleaning and inspection of the internal parts is necessary to keep the fluid regulator working properly.

1.Relieve all air and fluid pressure in the system.

2.Remove the regulator from the system.

3.Disassemble the regulator (see the parts drawings on pages 16 through 22).

4.Clean and inspect all parts.

CAUTION

Be very careful when handling the carbide balls and seats. Damage will cause poor operation and leak- age.

5.Inspect the diaphragm, packings, o-rings, and seals for wear. Check the ball and seat for nicks, wear, or other damage.

6.Lubricate packings, o-rings and seals when reas- sembling the regulator.

7.Torque as specified on the parts drawings on pages 16 through 22

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