Troubleshooting - Landa ZG3-2000 Serie Manual Del Usuario

ZG SERIES PRESSURE WASHER
PROBLEM
LOW OPERATING
PRESSURE
FLUCTUATING
PRESSURE
PRESSURE LOW
AFTER PERIOD OF
NORMAL USE
PUMP NOISY

TROUBLESHOOTING

POSSIBLE CAUSE
Faulty pressure gauge
Insufficient water supply
Old, worn or incorrect spray
nozzle
Plumbing or hose leak
Faulty or misadjusted unloader
valve (where applicable)
Worn packing in pump
Fouled or dirty inlet or
discharge valves in pump
Worn inlet or discharge valves
Leaking pressure control valve
(where applicable)
Slow engine RPM
Valves worn
Blockage in valve
Pump sucking air
Worn piston packing
Nozzle worn
Inlet or discharge valves
blocked or worn
Unloader valve seat worn
Air in suction line
Broken or weak inlet or
discharge valve springs
Foreign matter in valves
Worn bearings
Excessive temperature of liquid
LANDA ZG • REV. 5/02
OPERATOR'S MANUAL
SOLUTION
Install new gauge.
Use larger supply hose; clean filter at water
inlet.
Match nozzle number to machine and/or replace
with new nozzle.
Check plumbing system for leaks. Retape leaks
with teflon tape.
Adjust unloader for proper pressure. Install
repair kit when needed.
Install new packing kit.
Clean inlet and discharge valves.
Replace with valve kit.
Rebuild or replace as needed.
Set engine speed at proper specifications
(approx. 2800 RPM - 3400 RPM).
Check and replace if necessary.
Check and clean out if necessary.
Check water supply and suction line for air
seepage at joints.
Check and replace if necessary.
Check and replace if necessary.
Check and clean or replace if necessary.
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.
Reduce to below 75 o C (180
11
o F).