Graco Ultra-lite 235627, Instructions-Parts List Manual

Page: 9 / 24

Service
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.
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.
WARNING
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
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.
WARNING
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.