Lavorwash PWR4000 Mode D'emploi page 13

Pressure Washer Troubleshooting Continued
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Make sure the water inlet hose is not kinked or damaged
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Check the inlet water filter. Clean or replace if necessary
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Make sure the water supply is not too hot. Inlet water temperature
should not exceed 140° F
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If a detergent is being used, make sure the detergent hose is
submerged and not drawing air into the system. If detergent is not
being used, the chemical injector valve should be turned off
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Make sure the unloader/regulator valve is properly adjusted
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Make sure the pump outlet hose is not leaking and is not blocked
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Check the wand and high pressure hose quick couplers for missing
O-rings
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Check that the nozzle is clear and unobstructed
More Troubleshooting Tips
1. If the pump is running but produces no flow, try priming the pump.
a) To prime the pump, keep suction at a minimum and keep
b) Open and close the spray gun trigger repeatedly to aid the
2. A chattering noise usually indicates a restricted water supply or
air leaks.
a) Check for kinks or leaks in the hoses
b) look for a plugged or damaged inlet water filter
c) If the filter has been damaged, sediment may have entered the
pump. The sediment will be lodged in the inlet valve(s) and must
be removed.
3. Damage to the pump can result from
a) inadequate water supply,
b) vacuum lift too high, or
c) excessive water temperature.
4. Check the pump crankcase for correct oil level and for oil
contamination. If oil appears milky, water has entered the oil and
the piston seals should be replaced.
Problems With Detergent
Problems with the use of detergent are often caused by incorrect
procedures on the part of the operator. Problems encountered that
involve the use of cleaning agents can often be attributed to one or
more of the following:
1. Wrong Nozzle: Use the brass soaper nozzle when using deter-
gents.
2. Hose is not fully submerged in solution: If the tube is not fully
immersed, the unit will be picking up air.
3. Injection valve is closed: The detergent valve must be open in
order to pick up detergent.
Pressure Washer Operation Manual
the discharge line open
priming process
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