Graco PR70 Operation & Maintenance Manual page 42

Setup
Adjust Phasing
303
302
301
Key:
301 Piston Shaft
302 Locking Nut
303 Phase Adjustment Screw
9. Watch the dispense valve carefully to observe
which material is dispensed first. Press the
Start/Stop Shot button (
dispense material.
10. If the materials do not exit the dispense valve at the
same time adjust the piston Phase Adjustment
Screw (303) as follows.
• If the A side material exits the dispense nozzle
before the B side material (
a. Use two 13 mm wrenches to break loose
the locking nut (302) from the phase adjust-
ment screw (303) on the B material side.
b. Hold the phase adjustment screw (303) sta-
tionary with a 13 mm wrench.
c. Use a 7 mm wrench to turn the piston
shaft (301) counterclockwise 1/4 turn or
less to move the B piston forward.
42
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) or the footswitch to
):
• If the B side material exits the dispense nozzle
before the A side material (
a. Use two 13 mm wrenches to break loose
the locking nut (302) from the phase adjust-
ment screw (303) on the A material side.
b. Hold the phase adjustment screw (303) sta-
tionary with a 13 mm wrench.
c. Use a 7 mm wrench to turn the piston
shaft (301) counterclockwise 1/4 turn or
less to move the A piston forward.
It is highly recommended that all of the phasing
adjustment be done to one side or the other; not
both.
Ensure the piston shaft and phase adjustment
screw do not rotate while tightening the locking
nut (302) in the following step.
11. Hold piston shaft (301) and phase adjustment
screw (303) in place with a 7 mm and 13 mm
wrench and tighten locking nut (302) against phase
adjustment screw with a 13 mm wrench.
12. Watch the dispense valve carefully to observe
which material is dispensed first. Press the
Start/Stop Shot button (
dispense material. If one material exits the dispense
nozzle before the other, go back to step 10.
Exit Calibration Mode
13. Press the Enter/Exit Phasing button (
14. Navigate to the Home screen. See Screen Naviga-
tion Diagram, page 17.
):
) or the foot switch to
).
312759W