Stihl RE 521, Instruction Manual

Page: 58 / 284

RE 521, RE 551 PLUS, RE 581, RE 581 PLUS
English
56
Always unplug the power cable before
servicing or cleaning the machine.
In order to ensure trouble free operation,
we recommend carrying out the
following steps whenever the machine is
used:
N
Rinse the water hose, high-
pressure hose, spray lance and
accessories with water before fitting
them
N
Remove all sand and dust from the
plug-type coupling of the spray
lance and the coupling sleeve of the
spray gun
Cleaning the high-pressure nozzle
Since the pump pressure increases if
the nozzle is clogged, it must be cleaned
immediately.
N
Switch off machine
N
Actuate the spray gun until water
merely drips from the spray head –
the machine is now depressurized
N
Remove spray lance
N
Clean nozzle with a suitable needle
Always remove the spray lance before
cleaning the nozzle.
N
Rinse spray lance with water from
the nozzle end
Cleaning the water intake screens
Two screens are fitted in the water inlet
to trap coarse dirt particles.
The water intake screens must be
cleaned once per month or more often if
necessary.
Screen on the water tank
N
Disconnect hose (1)
N
Carefully release the screen (2) with
pliers and rinse it
N
Before refitting the screen, ensure
that it is undamaged and replace if
necessary
Screen at the inlet of the high-pressure
pump
N
Open shroud – see "Open shroud"
N
Unscrew union nut (1)
N
Carefully pry off the screen (2) with
a screwdriver and rinse it
Cleaning or replacing the fuel filter
N
Open shroud – see "Open shroud"
N
Unscrew the filter cover (1)
N
Pull out the fuel filter (2) and clean
or replace it - take note of the two O-
rings
Maintenance
647BA031 KN
2