Troubleshooting
3A6491E
29
Pump is difficult to prime
Air in pump or hose.
Check and tighten all fluid
connections. Cycle pump as slowly as
possible during priming.
Intake valve is leaking.
Clean intake valve. Be sure ball seat
is not nicked or worn and that ball
seats well. Reassemble valve.
Pump packings are worn.
Replace pump packings. See pump
manual.
Paint is too thick.
Thin the paint according to supplier
recommendations.
Sprayer operates for 5 to 10 minutes
then stops
Pump packing nut too tight. When
pump packing nut is too tight the
packings on the pump rod restrict
pump action and overloads the motor.
Loosen pump packing nut. Check for
leaks around throat. If necessary,
replace pump packings. See Pump
manual.
Problem
What to Check
If check is OK, go to next
check
What to Do
When check is not OK,
refer to this column
Summary of Contents for ST MAX II 395 PC Pro
Page 35: ...Troubleshooting 3A6491E 35 Electrical cont Sprayer Will Not Run See following page for steps ...
Page 36: ...Troubleshooting 36 3A6491E ...
Page 49: ...Notes 3A6491E 49 Notes ...
Page 52: ...Battery Replacement 52 3A6491E Battery Replacement BlueLink Units Only ...
Page 53: ...Wiring Diagrams 3A6491E 53 Wiring Diagrams 110 120V Models 395EU 490 495 595 ...
Page 55: ...Wiring Diagrams 3A6491E 55 120V 110V Model 650 ...
Page 57: ...Notes 3A6491E 57 Notes ...
Page 63: ...Graco Information 3A6491E 63 ...