How to Use the Gun

Installation/Operation

1.Guide a grounded fluid hose (with spring guard) through the hose guard (14) and connect the hose to the gun inlet. See Fig. 2.

2.With no tip installed, start the pump. Flush the pump according to the instructions supplied with it. Prime the system with the fluid.

WARNING

To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 5.

3.Relieve the pressure. Be sure the gun trigger safety is locked. See Fig. 1.

4.Model 235–459: Unscrew the tip guard (1) and install the tip (A) and the gasket (2d) in the nut of the tip guard. Screw the assembly firmly onto the gun. Tighten the assembly with a wrench. See Fig. 2.

NOTE: If the gasket (2d) is not installed, the gun will leak.

5.Models 235–459 and 237–691: install the SwitchTip (19) and the tip guard (18). See manual 308–644, supplied.

1 A 2d

19	14
18	01463

Fig. 2

6.Start the pump. Adjust the fluid pressure until the spray is completely atomized. Use the lowest pressure necessary to get the desired results. Higher pressure may not improve the spray pattern and will cause premature tip wear and pump wear.

7.If adjusting the pressure does not give a good spray pattern, follow the Pressure Relief Proce- dure on page 5 and then try another tip size.

8.Use a full-open, full-close triggering action. Hold the gun about 14 in. (350 mm) from and at right angles to the work surface. Don’t swing the gun in an arc. Practice to find the best length and speed of stroke.

How to Adjust the Spray Pattern.

1.To adjust the spray pattern direction, follow the Pressure Relief Procedure on page 5. Loosen the tip guard retaining nut (B). Turn the tip guard/ tip groove horizontally (C) for a horizontal pattern and vertically (A) for a vertical pattern. Tighten the retaining nut.

2.The spray tip orifice and spray angle determines the coverage and size of the pattern. When more coverage is needed, use a larger spray tip rather than increasing the fluid pressure.

CAUTION

The openings in the tip guard reduce paint buildup on the tip guard while spraying. Any damage to the sharp edges of the openings causes paint to collect at that area. Never hang the gun by the tip guard.

KEY

A Tip guard shown in position for vertical spray pattern

B Retaining nut

C Tip guard shown in position for horizontal spray pattern

B C

Fig. 3