Graco 309550Y important safety instructions Check Valves, Clean Fluid Manifold

Check Valves

Before disassembling, press on ball (26c) to test check valve for proper movement and spring action.

1. Follow Pressure Relief Procedure, page 15.

2. Remove fluid manifold (M). Leave air connected.

Clean Fluid Manifold, page 20.

M

TI2543A

3. Flush gun to remove residual A and B compo-

nents, page 20. Follow Pressure Relief Proce- dure, page 15.

4. Disconnect air.

TI2540A

CAUTION

To prevent cross-contamination of the check valves, do not interchange A component and B component parts. The A component check valve is marked with an A.

Repair

5. Pry out check valves (26) at notch.

WARNING

Read warnings, page 7. Damaged check valve o-rings (26f, 26g) may result in external leakage. Replace o-rings if any damage is seen.

6. Slide filter (26d) off. Clean and inspect parts. Thor-

oughly inspect o-rings (26f, 26g). If necessary, remove screw (26b) and disassemble entire check valve.

B

A

26b

26e

26c

26d

26

26g

26a

26f TI2429A

7. Reassemble check valves. Screw (26b) should be

flush (within 1/16 in. or 1.5 mm) of housing (26a) surface. Liberally lubricate o-rings (26f, 26g) and carefully reinstall in fluid housing.

8. Attach fluid manifold. Connect air. Return gun to

service.

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