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Adjusting the Valve

The trigger travel and corresponding valve opening are factory set to 1 inch (25.4 mm). To adjust this setting, follow the procedure below.

WARNING

SKIN INJECTION HAZARD

To reduce the risk of a serious injury, including fluid injection, follow the Pres-

sure Relief Procedure on page 6 whenever you are instructed to relieve the pressure.

1.Relieve the pressure in the system.

2.Disconnect the gun from the hose.

3.Using a 5/16 in. wrench, loosen the stem nut (1) and spring housing (28). See Fig. 4, page 11.

4.Insert a 1/8 hex allen wrench through the hole in the spring adjustment screw (21) and into the spring housing (28).

5.Turn the spring housing (28) and stem nut (1) to change the trigger travel and the size of the valve opening.

6.Tighten the stem nut (1) to set the adjustment.

7.Adjust the spring adjustment screw (21) to the desired trigger pull force.

Adjusting the Spring Tension

WARNING

SKIN INJECTION HAZARD

To reduce the risk of a serious injury, including fluid injection, follow the Pres-

sure Relief Procedure on page 6 whenever you are instructed to relieve the pressure.

1.Relieve the pressure in the system.

2.Disconnect the gun from the hose.

3.Turn the spring adjustment screw (21) as needed until the spring force is adjusted to close the valve. Refer to Fig. 4, page 11.

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Graco 235628, 237607, 237649, 243775, 235627 warranty Adjusting the Valve, Adjusting the Spring Tension

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