Landa 1.106-500.0, Operator'S Manual

Page: 14 / 18

14
Maintenance
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.
Faulty or misadjusted unloader valve
Tampering with the factory setting may
cause personal injury and/or property damage,
and will void the manufacturer's warranty.
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.
Unloader adjusted improperly Call local Landa dealer.
Worn piston packing Check and replace if necessary.
Bypass valve within unloader is
obstructed or leaking
Remove and clean bypass cartridge.
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.
Landa SEA Operator Manual 8.913-999.0 - AK