© SprayTECH. All rights reserved.
17
Troubleshooting
Problem
The unit will not run.
The unit will not prime.
The unit will not build or
maintain pressure.
Fluid leakage at the upper end
of the fluid section.
Excessive surge at the spray
gun.
Poor spray pattern.
The unit lacks power.
Cause
1. The pressure is set too low.
2. Faulty or loose wiring.
3. The gas tank is empty.
1. The PRIME/SPRAY valve is in the
SPRAY position.
2. Air leak in the siphon tube/siphon set.
3. The pump filter and/or inlet screen is
clogged.
4. The siphon tube/siphon set is clogged.
1. The spray tip is worn.
2. The spray tip is too large.
3. The pressure control knob is not set
properly.
4. The pump filter, gun filter, or inlet
screen is clogged.
5. Material flows from the return hose
when the PRIME/SPRAY valve is in the
SPRAY position.
6. Air leak in the siphon tube/siphon set.
7. There is external fluid leak.
8. There is an internal fluid section leak
(packings are worn and/or dirty, valve
balls are worn).
9. Worn valve seats
1. The upper packings are worn.
2. The piston rod is worn.
1. Wrong type of airless spray hose.
2. The spray tip worn or too large.
3. Excessive pressure.
1. The spray tip is too large for the
material being used.
2. Incorrect pressure setting.
3. Insufficient fluid delivery.
4. The material being sprayed is too
viscous.
1. The pressure adjustment is too low.
Solution
1. Turn the pressure control knob clockwise to
supply power to the unit and increase the
pressure setting.
2. Inspect or take to a SprayTECH authorized
service center.
3. Fill the gas tank.
1. Rotate the PRIME/SPRAY valve clockwise
to the PRIME position.
2. Check the siphon tube/siphon set
connection and tighten or re-tape the
connection with Teflon tape.
3. Remove the pump filter element and clean.
Remove the inlet screen and clean.
4. Remove the siphon tube/siphon set and
clean.
1. Replace the spray tip following the
instructions that came with the spray gun.
2. Replace the spray tip with a tip that has a
smaller orifice following the instructions that
came with the spray gun.
3. Turn the pressure control knob clockwise to
increase the pressure setting.
4. Remove the pump filter element and clean.
Remove the gun filter and clean. Remove
the inlet screen and clean.
5. Clean or replace the PRIME/SPRAY valve.
6. Check the siphon tube/siphon set
connection and tighten or re-tape the
connection with Teflon tape.
7. Check for external leaks at all connections.
Tighten connections, if necessary.
8. Clean the valves and service the fluid
section following the “Servicing the Fluid
Section” procedure in the Maintenance
section of this manual.
9. Reverse or replace the valve seats following
the “Servicing the Fluid Section” procedure
in the Maintenance section of this manual.
1. Repack the pump following the “Servicing
the Fluid Section” procedure in the
Maintenance section of this manual.
2. Replace the piston rod following the
“Servicing the Fluid Section” procedure in
the Maintenance section of this manual.
1. Replace hose with a minimum of 50’ of 3/8”
grounded textile braid airless paint spray
hose.
2. Replace the spray tip following the
instructions that came with the spray gun.
3. Rotate the pressure control knob
counterclockwise to decrease spray
pressure.
1. Replace the spray tip with a new or smaller
spray tip following the instructions that
came with the spray gun.
2. Rotate the pressure control knob to adjust
the pressure for a proper spray pattern.
3. Clean all screens and filters.
4. Add solvent to the material according to the
manufacturer's recommendations.
1. Rotate the pressure control knob clockwise
to increase the pressure setting.
