12 After Finishing Work
12.2 Protecting the Pressure Washer in Winter
Conditions
Removing Water from the System
To remove any remaining water from the system:
► Switch off the pressure washer, @ 10.2.
► Disconnect the pressure washer from the power supply.
► Shut off the water supply.
► Relieve system pressure.
► Remove the high-pressure hose, @ 8.3.2.
► Disconnect the water hose, @ 9.
► Drain the water out of the high-pressure hose and water
hose.
► Connect the power supply cord to a properly installed
electrical outlet that matches the voltage and electrical
frequency stated on the pressure washer's rating plate.
► Switch on the pressure washer and let the pump run for up
to 30 seconds until the water flow stops. Remaining water
will be eliminated from the system.
► Switch off pressure washer and disconnect it from the
power supply.
NOTICE
Freezing temperatures can damage components of the
pressure washer. STIHL recommends storing the pressure
washer indoors in a dry room where it is protected from
freezing temperatures. Relieve all system pressure and
make sure all water is eliminated from the pump system and
hoses before storing.
Protecting the Pressure Washer with Antifreeze
WARNING
When using antifreeze to protect your pressure washer in
winter conditions, observe all warnings and instructions
provided by the manufacturer to reduce the risk of severe
personal injury from ingestion or environmental
contamination.
0458-620-8221-A
If the pressure washer is to be exposed to freezing
temperatures, it should be protected by a glycol-based
antifreeze. The antifreeze prevents water inside the
pressure washer from freezing and causing damage to the
pressure washer.
To protect the pressure washer with antifreeze:
► Drain the water out of the high-pressure hose.
► Disconnect the spray lance from the spray gun.
► Connect the shortest possible water hose to the pressure
washer. The shorter the water hose, the less antifreeze is
needed.
► Point the spray lance downward and wait until all the water
has flowed out of the system.
► Pour antifreeze into a clean container.
► Connect a suction hose to the water inlet of the high-
pressure pump and place the other end of the hose in the
container of antifreeze.
► Squeeze and hold the spray gun trigger.
► Switch on the pressure washer.
► Hold down the spray gun trigger until an even jet of
antifreeze is delivered from the spray gun. Keep the spray
gun into the container and follow the antifreeze supplier's
instructions for avoiding environmental release.
► Press and release spray gun trigger several times.
► Switch off the pressure washer and disconnect it from the
power supply.
► Detach the spray gun, high-pressure hose and water hose
and allow antifreeze to run into the container.
► Collect and dispose of the antifreeze in accordance with
the manufacturer's specifications and all federal, state
and local laws, regulations and ordinances.
NOTICE
Freezing temperatures can damage components of the
pressure washer. STIHL recommends storing the pressure
washer indoors in a dry room where it is protected from
freezing temperatures. Relieve all system pressure and
make sure all water is eliminated from the pump system and
hoses before storing.
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