620-622 • 9.800-187.0 • Rev. 9/10
17
PRESSURE WASHER Troubleshooting Guide
TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
SOLUTION
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 temperature of liquid
Reduce to below 60°C (140°F).
Foreign 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.
Piston packing worn
Check and replace if necessary.
WATER DRIPPING
FROM UNDER PUMP
Piston packing worn
Check and replace if necessary.
O.R. Plunger retainer worn
Check and replace if necessary.
Cracked ceramics
Check and replace if necessary.
OIL DRIPPING
Oil seal worn
Check and replace if necessary.
Cracked manifold
Check and replace if necessary.
