Troubleshooting
60 313997ZAA
Material imbalance. Inadequate flow from pump; cavitation Increase fluid supply to proportioning pump:
• Use 2:1 supply pump
• Use minimum 3/4 in. (19 mm) ID supply hose, as
short as practical
Fluid is too thick. Consult your material supplier for
the recommended fluid temperature to maintain a vis
cosity of 250 to 1500 centipoise.
Clean inlet strainer screen
Worn pump inlet valve ball/seat or gasket
Pressure relief/circulation valve leak
ing back to supply
Remove return line and determine if flow is present
while in SPRAY mode
Erratic pump movement Pump cavitation Feed pump pressure is too low. Adjust pressure to
maintain 100 psi (0.7 MPa, 7 bar) minimum.
Pump output low Obstructed fluid hose or gun; fluid
hose ID too small
Open, clear; use hose with larger ID
Worn piston valve or intake valve in
displacement pump
See pump manual
Inadequate feed pump pressure Check feed pump pressure and adjust to 100 psi (0.7
MPa, 7 bar) minimum.
Problem Cause Solution
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