Landa VNG8-3000 - Troubleshooting - Pump & Valve Issues; Pressure Fluctuations, Noise & Leaks

8.913-939.0 • LANDA VNG • Rev. 5/11
23
PRESSURE WASHER Troubleshooting Guide
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
FLUCTUATING
PRESSURE
Valves worn Check and replace if necessary.
Blockage in valve Check and replace if necessary.
Pump sucking air Check water supply and air seepage at joints
in suction line.
Worn piston packing Check and replace if necessary.
PUMP NOISY
Air in suction line Check water supply and connections on
suction line.
Broken or weak inlet or discharge
valve springs
Check and replace if necessary.
Excessive matter in valves Check and clean if necessary.
Worn bearings Check and replace if necessary.
PRESENCE OF
WATER IN OIL
Oil seal worn Check and replace if necessary.
High humidity in air Check and change oil twice as often.
WATER DRIPPING
FROM UNDER
PUMP
Piston packing worn Check and replace if necessary.
O-ring plunger retainer worn Check and replace if necessary.
OIL DRIPPING
Oil seal worn Check and replace if necessary.
EXCESSIVE
VIBRATION IN
DELIVERY LINE
Irregular functioning of the valves Check and replace if necessary.
RELIEF VALVE
LEAKS WATER
Relief valves defective Replace or repair.