Landa MPE5-5000, Operator'S Manual

Page: 15 / 24

MPE SERIES PRESSURE WASHER
OPERATOR’S MANUAL
15
LANDA MPE • Rev. 5/02
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
PUMP RUNNING
NORMALLY BUT
PRESSURE LOW ON
INSTALLATION
Pump sucking air Check water supply and possibility of air seepage.
Check valves sticking Check and clean or replace if necessary.
Unloader valve seat faulty Check and replace if necessary.
Nozzle incorrectly sized Check and replace if necessary.
Worn piston packing Check and replace if necessary.
FLUCTUATING
PRESSURE
Valves worn Check and replace if necessary.
Blockage in valve Check and clean out if necessary.
Pump sucking air Check water supply connections.
Worn piston packing Check and replace if necessary.
Insufficient water Check filter and hose for breakage.
PRESSURE LOW
AFTER PERIOD OF
NORMAL USE
Nozzle worn Check and replace if necessary.
Suction or delivery valves worn Check and replace if necessary.
Suction or delivery valves
blocked
Check and clean if necessary.
Unloader valve seat worn Check and replace if necessary.
Worn piston package Check and replace if necessary.
PUMP NOISY
Air in suction line Check water supply and connections on suction line.
Broken or weak suction or
delivery valve spring
Check and replace if necessary.
Foreign matter in valves Check and clean if necessary.
Worn bearings Check and replace if necessary.
Excessive temperature of water Reduce to below 140 o F.
PRESENCE OF WATER
IN PUMP 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-Ring plunger retainer worn Check and replace if necessary.
WATER DRIPPING
FROM PUMP
PROTECTOR
Water supply pressure too high
(over 90 psi)
Lower water supply pressure using a regulator.
Spray gun is in the off position
for over 5 minutes
Turn machine off if not in use for over 5 minutes.
OIL DRIPPING
Oil seal worn Check and replace if necessary.
EXCESSIVE VIBRATION
IN HIGH-PRESSURE
HOSE
Irregular functioning of the
pump valves Check and replace if necessary.