Graco Inc 258734, 7900HD, 3A0242A, 258737, 258738, 258736, 258731 Pressure Relief Procedure, Setup

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Pressure Relief Procedure

1.Lock gun trigger safety.

2.Turn engine ON/OFF switch to OFF.

3.Move pump switch to OFF and turn pressure control knob fully counterclockwise.

4.Unlock trigger safety. Hold metal part of gun firmly to side of grounded metal pail, and trigger gun to relieve pressure.

Setup

Pressure Relief Procedure

5.Lock gun trigger safety.

6.Open pressure drain valve. Leave valve open until ready to spray again.

If you suspect that the spray tip or hose is completely clogged, or that pressure has not been fully relieved after following the steps above, VERY SLOWLY loosen tip guard retaining nut or hose end coupling to relieve pressure gradually, then loosen completely. Now clear tip or hose.

1.Standard Units Only: Connect appropriate Graco high-pressure hose to sprayer.

2.Standard Units Only: Install whip hose to fluid inlet of spray gun and tighten securely.

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3. Engage gun trigger safety.

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4.When spraying texture, remove inlet strainer and fil- ter bowl screen when spraying materials.

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5.Fill throat packing nut with TSL to prevent premature packing wear. Do this each time you spray.

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6.Check engine oil level. Add SAE 10W-30 (summer) or 5W-20 (winter), if necessary.

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7. Fill fuel tank.

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8. Attach sprayer grounding clamp to earth ground.

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3A0242A

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Contents Operation Fire and Explosion Hazard Pressurized Aluminum Parts Hazard Component Identification Setup Pressure Relief ProcedureConvertible Models Only SEC StartupSwitch Guard Assembly Clearing Tip Clogs Hose ReelOperation Main Menu Digital Tracking SystemSecondary Menu Stored Data WatchDog Pump Protection Modes Cleanup 3A0242A 3A0242A 3A0242A For Graco Canada Customers Graco Standard Warranty