Storch Airless Duomax 9000, Manual, Page: 111 / 146

111
9. Help with problems with the Airless Pump
Problem Probable cause Remedy
Electric motor does not start up 1. Mains cable not connected or
fuse blown
2. Electric motor defective
3. Switch defective
Check
Replacement
Replacement
Pump not providing suction 1. Air in suction system
2. Pressure insufficient
3. Inlet valve or outlet valve obst-
ructed/clogged
Tighten up suction pipe or increase
pressure, clean paint in suction posi-
tion, allow to circulate
Poor material flow 1. No paint
2. Suction filter clogged
3. Filter pump / gun contaminated
4. No suction from pump, material
too heavy
Check supply, clean, clean or re-
place, thin material
Pump fails to sustain pressure 1. Device leaky
2. Suction system leaky.
3. Inlet valve does not sit
4. Seals worn
5. Broken or worn valve seats
6. Suction valve worn
7. Circulation valve leaky
Tighten screw connections, check
for leaks, clean and repair. Replace
/ check/tighten jam nut, turn over or
replace. Replace clean or replace
Not enough pressure 1. Pressure set too low
2. Clogged filter
3. Spray nozzle too large or worn
position higher, clean or replace
change or replace
Pump action at gun too strong (pul-
sating spray pattern)
1. Wrong hose
2. Spray nozzle too large or worn
3. Overpressure
Replace with spray hose of at least
15 m length, change or replace
earthed nylon version, reduce pres-
sure and motor output
Pump does not build up sufficient
pressure Head of paint level beco-
mes very hot Paint penetrates lubri-
cant container of pump block
1. Too little hydraulic oil in system
2. Packings leaky and worn
Check hydraulic oil level and top up
if necessary. Check/tension Replace/
Jam nut