Graco Inc 24C932, 313872B, 257999, 24C934, 24C933, TI14450a Clean Check Valves

	Maintenance
Clean Check Valves	6. Use flat tip screwdriver to pry out check valves at
	notch.

1.Follow Pressure Relief Procedure, page 22.

2.Flush Gun, page 25.

3.Disconnect air quick coupler (AC). Use hex nut driver to remove fluid manifold (AD).

TI14464a

AD AC

TI14463a

4.Disconnect signal cable.

5.Clean and inspect check valve mating surfaces and fluid ports. See Clean Fluid Manifold on page 26.

Damaged check valve o-rings may result in external leakage. Replace o-rings if worn or damaged.

7.Press on ball (BC) to test check valve for proper movement and spring action. Replace check valve assembly if necessary.

8.Slide filter (BD) off. Clean and inspect parts. Thor- oughly inspect o-rings (BE, BG). If necessary, remove screw (BA) and disassemble check valve.

B

A

NOTICE

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.

AK

BA

BB

BC

BD

BE

BF

BG TI14464a

FIG. 21

9.Liberally lubricate o-rings (BE, BG). Reassemble check valves. Screw (BA) should be flush with check valve housing surface (within 1/16 in. or 1.5 mm).

10.Install check valves into fluid housing (AK).

313872B 27