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Operating manual Piston Pump EvoMotion 20-30
9 Troubleshooting and Rectification
9 TROUBLESHOOTING AND RECTIFICATION
Malfunction
The pump does not
work.
Poor spray pattern.
Irregular operation of
product pump: Spray
jet collapses (pulsa-
tion).
The pump runs evenly,
but does not suck up
any product.
The pump is working
with a closed spray
gun.
The air motor is iced up There is a lot of condensation water in
If none of the causes of malfunction mentioned are present, the defect can be remedied by a
WAGNER service center.
Order number 2333553 | Edition 09/2020
Cause
The pump does not start or stops.
No pressure indication on the pressure
gauge (air pressure regulator defec-
tive).
Spray nozzle is clogged.
Insufficient compressed air supply.
Filter insert in spray gun is clogged.
Fluid section or high-pressure hose is
blocked (e.g., 2K product hardened).
Sometimes, the pump stops at a
switching point.
See the gun instructions.
Viscosity is too high.
Spraying pressure is too low.
Valves are clogged.
Foreign body in suction valve.
Diameter of compressed air line too
small.
Valves, packings, or pistons are worn
out.
Pressure regulator filter is clogged.
The suction system's union nut is loose;
the pump is taking in air.
Suction filter is clogged.
Ball in suction or piston valve is stuck.
Packings, valves, or pistons are worn
out.
the air supply.
Remedy
Open and close ball valve on the pres-
sure regulator unit or briefly disconnect
compressed air supply.
Disconnect compressed air supply
briefly or repair or change pressure regu-
lator.
Clean the nozzle according to the in-
structions.
Check compressed air supply.
Clean the parts and use a suitable work-
ing material.
Dismount and clean fluid section, re-
place high-pressure hose.
Press the starter on the reverse valve
and restart the pump. Clean the slide on
the reversing valve carefully and, if nec-
essary, lubricate it with a light layer of
oil.
Thin spraying product.
Increase incoming air pressure.
Use a smaller nozzle.
Clean pump. If necessary, leave it to soak
in cleaning agent.
Dismantle suction valve housing, clean
and check valve seat.
Assemble a larger supply line -> chapter
Technical Data [8 20]
Replace the parts.
Check and clean it if necessary.
Tighten union nut.
Clean filter.
Clean balls and valve seats.
Replace the parts.
Install a water separator.
45
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