The pump
Water inlet filter is
doesn't
clogged.
reach the
Pump sucking air from
necessary
connections or hoses.
pressure
Suction/ delivery valves
are clogged or worn out.
Unloaded valve is stuck.
Lance nozzle incorrect or
worn out.
Clean the water inlet filter.
Check that all supply
connections are tight.
Check that the water
feeding hose is not leaking.
Clear or replace valves.
Loosen and re-tighten
regulation screw.
Check and/or replace.
48