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