Graco Inc 222700, 3500WB, 308584 manual ES ON-OFF Valve Repair, Moving Parts Hazard, Service, 05363B

Service

ES ON-OFF Valve Repair

1.Prepare the gun for service as instructed on page 30.

2.Loosen the set screw (24) with the 2 mm hex key (69). Remove the lever (26) from the valve. See Fig. 24.

WARNING

MOVING PARTS HAZARD

To reduce the risk of an eye injury, wear safety glasses when removing or install- ing the retaining ring (47) as the retain- ing ring could slip off the tool when com- pressed.

3.Use internal snap ring pliers (Graco part no. 110090) to remove the retaining ring (47) from the handle. Align the holes in the retaining ring with the flat on the spacer (32) to ease assembly and disassembly.

4.Remove the valve body (38) from the handle; be careful not to drop the regulator disk (46) and spacer (32).

5.Clean and inspect the parts for damage. Replace parts if necessary. Lightly lubricate the o-ring (36) with petroleum jelly.

CAUTION

Do not over-lubricate parts. Excessive lubricant on the o-ring (36) can be pushed into the gun air pas- sage and blemish the finish on the workpiece.

6.Install the regulator disk (46) in the valve (38) with its bevelled side facing toward the valve.

CAUTION

Be sure the regulator disk (46) is installed correctly. A missing or incorrectly installed regulator disc can cause severe damage to the power supply turbine.

7.Install the valve (38) with the regulator disc (46) and o-ring (36) into the gun handle. Install the spacer (32) on the valve.

8.Install the retaining ring (47) into the groove in the handle.

WARNING

MOVING PARTS HAZARD

Always make sure that the retaining ring

(47) is engaged in the groove in the gun handle when installing the ES ON-OFF valve. If the retaining ring is missing or improperly

installed, the valve assembly can be propelled out of the gun when air pressure is applied and cause serious injury.

9.Install the lever (26) and tighten the set screw (24).

Apply a very light coat of lubricant to the o-ring (36).

Bevelled side of the regulator disk (46) toward the valve (38).

26

47

 36

24

32

38

 46

05363B

Fig. 24

38 308584