Landa MPG5-5000, Operator'S Manual

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14
MPG SERIES PRESSURE WASHER
OPERATOR’S MANUAL
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
LOW OPERATING
PRESSURE
Faulty pressure gauge Install new gauge.
Insufficient water supply Use larger garden hose; clean filter washer at
water inlet.
Old, worn or incorrect spray nozzle Match nozzle number to machine and/or
replace with new nozzle.
Plumbing or hose leak Check plumbing system for leaks. Retape
leaks with teflon tape.
Faulty or misadjusted unloader valve
(where applicable) Adjust unloader for proper pressure. Install
repair kit when needed.
Worn packing in pump Install new packing kit.
Fouled or dirty inlet or discharge
valves in pump
Clean inlet and discharge valves.
Worn inlet or discharge valves Replace with valve kit.
Leaking pressure control valve (where
applicable)
Rebuild or replace as needed.
Slow engine RPM Set engine speed per specifications
(approximately 2800 RPM - 3400 RPM).
FLUCTUATING
PRESSURE Valves worn Check and replace if necessary.
Blockage in valve Check and clean out if necessary.
Pump sucking air Check water supply and suction line for air
seepage at joints.
Worn piston packing Check and replace if necessary.
PRESSURE LOW
AFTER PERIOD OF
NORMAL USE
Nozzle worn Check and replace if necessary.
Inlet or discharge valves blocked or
worn
Check and clean or replace if necessary.
Unloader valve seat worn Check and replace if necessary.
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.
Foreign matter in valves Check and clean if necessary.
Worn bearings Check and replace if necessary.
Excessive temperature of liquid Reduce to below 140
o
F (60
o
C)