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Installation/operation, Warning, Caution – Graco Inc. 241705 User Manual

Page 6

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Installation/Operation

How to Operate the Gun

WARNING

To reduce the risk of component rupture, and seri-

ous injury, including fluid injection, do not exceed

the gun’s 4000 psi (276 bar, 27.6 MPa) Maximum

Working Pressure or the maximum working pres-

sure of lowest rated component in the system.

04731

Fig. 2

30

8

A

1. Connect an electrically conductive fluid hose (A) 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.

Use the lowest pressure possible. Prime the

system with the material.

3. Relieve pressure.

4. Install the SwitchTip (8) and tip guard (30). Follow

the i nstructions in the manual, supplied.

See Fig. 2.

5. Start the pump. Trigger the gun onto test paper.

Adjust the fluid pressure until the spray is

completely atomized. Use the lowest pressure

necessary to get the desired results. Higher pres-

sure may not improve the spray pattern and will

cause premature tip and pump wear.

6. If adjusting the pressure does not give a good

spray pattern, relieve pressure and then try

another tip size.

7. Use a full-open, full-close trigger 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, relieve pres-

sure. Loosen the tip guard retaining nut (B). Turn

the tip guard/tip groove horizontally (C) for a hori-

zontal pattern and vertically (A) for a vertical

pattern. Tighten the nut. See Fig. 3.

2. The spray tip orifice and spray angle determines

the coverage and size of pattern. When more

coverage is needed, use a larger spray tip rather

than increasing fluid pressure.

CAUTION

Openings in the tip guard reduce paint buildup on

the guard while spraying. Damage to the sharp

edges of the openings causes paint to collect at

that area. Never hang the gun by the tip guard.

Fig. 3

A

B

C

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