Graco Spray Gun 26B509

Warning: Always ground equipment and waste container to avoid fire and explosion.

Flush at the lowest pressure possible. Check connectors for leaks and tighten as necessary.

Flush before changing colors, before fluid can dry in the equipment, at the end of the day, before storing, and before repairing equipment.

Follow the Pressure Relief Procedure

Upload a photo of the removed retaining ring (8b), air cap (8a), and spray tip (7).

Change the fluid source to solvent or disconnect the fluid line and connect a solvent supply line to the gun.

Warning: Methylene chloride with formic or propionic acid will damage aluminum and nylon components. Do not use to flush or clean the gun.

Point the gun down into a grounded metal container. Hold a metal part of the gun firmly to the grounded metal container.

Reverse-A-Clean (RAC) Tip Maintenance

To avoid serious injury from skin injection, do not put your hand in front of the spray tip when removing, installing, or maintaining the air cap assembly.

NOTE: Do not soak the RAC tip seat gasket (33a) in solvent for extended periods of time or swelling may occur.

1. Release the trigger, and engage the trigger lock (3).

2. Rotate the SwitchTip and tighten the retaining ring.

3. Disengage the trigger lock (3).

4. Trigger the gun into a pail to clear the clog.

Step 1: Inspect Ventilation System

Ensure that the spray booth ventilation system is functioning properly.

Confirm that the ventilating air flow is above the minimum required value.

Step 2: Test the Interlock Function

Simulate or induce a condition where the air flow drops below the minimum level.

Verify that the gun fluid supply automatically shuts off and the gun cannot be operated.

This confirms that the interlock is correctly preventing gun operation during insufficient ventilation.

Step 3: Perform Annual Verification

Conduct this interlock test at least once per year.

Follow the Pressure Relief Procedure, page 15.

Remove the air cap assembly (8) and spray tip (7)

Flush the gun with a compatible solvent. See Flushing Procedure, page 21.

Soak the spray tip (7) in a compatible solvent.

Dip the end of a soft-bristle brush into a compatible solvent.

Do not use metal tools to clean the air cap assembly parts. Metal tools may scratch the air cap and cause spray pattern distortion.

Clean the air cap assembly (8) and spray tip (7) with a soft-bristle brush.

Use a soft tool, such as an unclogging needle or toothpick, to clean the air cap (8a) holes.

Blow air through the spray tip (7) to clear the orifice.

Follow the Pressure Relief Procedure, page 15.

Remove the air cap assembly (8) and spray tip (7)

Flush the gun with a compatible solvent. Follow the Flushing Procedure, page 21.

NOTICE: Methylene chloride with formic or propionic acid will damage aluminum and nylon components. Do not use to flush or clean the gun.

Soak the spray tip (7) in a compatible solvent.

Clean the air cap (8a), spray tip (7), and the outside of the fluid cartridge (6) with a soft-bristle brush. See Cleaning Procedure, page 22.

NOTE: Always point the gun down during cleaning to prevent solvent entering the gun air passages. Solvent left in gun air passages could result in a poor quality paint finish.

Clean the outside of the gun with a soft cloth.

Clean or replace the inline fluid filter (14). See Inline Fluid Filter Cleaning Procedure.