H.E.R.O. Industries PW-3540-AC Pressure Washer Owners Manual
Page 7
TROUBLE SHOOTING
FAULT
CAUSE
REMEDY
Pump running normally but
pressure does not achieve rated
pressure.
Pump sucking air.
Valves worn or dirty.
Insufficient water flow.
Unloader valve packing worn.
Nozzle incorrect or worn.
Worn piston packing.
Check that hoses and fittings
are air tight.
Check, clean or replace.
Increase water supply.
Check and replace.
Check and replace.
Check and replace.
Fluctuating pressure
Valves worn, dirty or stuck.
Pump sucking air.
Worn piston packing.
Insufficient water flow.
Check, clean or replace.
Check that hoses and fittings
are air tight.
Check and replace.
Increase water supply. May
require new water supply
source.
Pressure drops after period of
normal use.
Nozzle worn.
Valves worn, dirty or stuck.
Unloader valve packing worn.
Worn piston packing.
Check and replace.
Check, clean or replace.
Check, clean or replace.
Check and replace.
Pump noisy
Pump sucking air.
Valves dirty or worn.
Worn bearings.
Water too hot.
Check that hoses and fittings
are air tight.
Check, clean or replace.
Check and replace if necessary.
Reduce temperature.
Presence of water in oil
High humidity in air.
Piston packing and oil seal
worn.
Check and change oil twice as
often.
Check and replace.
Water dripping from under
pump.
Piston packing worn.
The O-rings of piston guide or
retainer worn.
Thermal relief valve opened.
Check and replace.
Check and replace.
Check and replace.
Oil dripping.
Oil seal worn.
Check and replace.
Engine will not start.
Low fuel level.
Low oil level.
Worn spark plug or gap.
Add fuel.
Add oil.
Replace.
