Graco Proportioning System 26R313

Check if the TSL fluid has turned into a gel

Check the color of the TSL fluid

Check for dilution with isocyanate

Does the TSL fluid need to be changed?

Follow the Pressure Relief Procedure, page 32.

Close the Fluid Inlet Valve (XA) at the pump inlet.

Place a container under the strainer base to catch fluid when removing the strainer drain plug (ZB).

Remove inlet cap (ZC) and inlet strainer screen (ZA) from the strainer manifold.

Thoroughly flush the screen with compatible solvent and shake it dry.

Inspect the screen. Ensure no more than 25% of the mesh is restricted.

Inspect the gasket and replace as required.

Clean gun mix chamber ports regularly

Clean the gun check valve screens regularly

Use clean, dry, oil-free compressed air to prevent dust buildup on control modules

Use clean, dry, oil-free compressed air to prevent dust buildup on fans

Use clean, dry, oil-free compressed air to prevent dust buildup on motor (under shield)

Change Transfer Pump Type to Electric

Repeat steps 2–3 for the other transfer pump motor if calibrating both pumps

Confirm there is no or low inlet pressure in the transfer pump by opening the recirculation lines (R)

Follow Pressure Relief Procedure

Verify TSL fluid pump operation