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9.4
PRESSURE WASHER TEST
Once the service and the tests on the single components have been carried out, it is necessary to test the whole high pressure
washer. Here follow the single steps to be performed in order to test a hot water pressure washer.
Check
Steps to be performed before the test:
Connections with the clumps and plug integrity.
Clean fuel filter inside the fuel pump.
Clean or substitute in line fuel filter.
Clean inlet water filters.
Check fuel tank and eliminate any possible impurity and/or condensate (water).
Check pump oil level, and fill up if it is under the right level
Replace the high pressure nozzle of the washing lance
Check
Steps to be performed during the test:
(TAKE CARE! The test has to be performed using all those accessories of which any machine is equipped:
high pressure hose, gun, lance and its quick couplings).
Check the condition of the cleansing injector.
Check and remove any possible leak from the high pressure hose and from the gun.
Check if any sign of leak or wear is shown, replace the quick couplings.
Calibrate the pressure to the nominal value.
Adjust the unloader valve.
Verify the correct working of the safety valve.
Calibrate the pressure of the fuel getting out from the burner’s pump.
Check that the outgoing water temperature corresponds to the nominal value.
Check that the smoke emissions from the heating system be in compliance with the law parameters.
Check the electric absorption both at the starting point and during the standard running.
9 - MAINTENANCE
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