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Basic Troubleshooting
313316E 41
Basic Troubleshooting
Check everything in this Basic Troubleshooting Table before you bring the sprayer to a Graco authorized service center.
Problem
What To Check
(If check is OK, go to next check)
What To Do
(When check is not OK, refer to this column)
Sprayer Will Not Operate
Basic Fluid Pressure 1. Pressure control knob setting.
Motor will not run if set at minimum
(fully counter-clockwise).
Slowly increase pressure setting to see if motor starts.
2. Spray tip or fluid filter may
be clogged.
Relieve Pressure, page 21. Then clear clog or clean
gun filter. Refer to gun instruction manual, 313347.
Basic Mechanical 1. Pump frozen or hardened paint Thaw sprayer if water or water-based paint has frozen
in sprayer. Place sprayer in warm area to thaw. Do not
start sprayer until thawed completely. If paint hardened
(dried) in sprayer, replace pump packings. See page 79.
2. Motor. Remove drive housing
assembly. See page 79.
Try to rotate fan by hand.
Replace motor if fan won’t turn. See page 39,
Motor Replacement.
Basic Air Pressure 1. Power/function selector. Ensure selection is ON.
2. Air ON/OFF valve at gun may
be closed.
Turn air adjustment valve counter-clockwise to open.
Slide air ON/OFF up to open.