Read these original operating instructions and the enclosed safety instructions before using the device for the first time. Proceed accordingly.

Keep both books for future reference or for future owners.

Use this high-pressure cleaner only for the following types of work:

• The high-pressure jet is intended exclusively for cleaning, e.g. machines, vehicles, structures, tools, facades, terraces and garden equipment.

We recommend using a dirt blaster as a special accessory for stubborn soiling.

The device is suitable for operation in altitudes of up to 500 m. For operation in higher altitudes the engine must be adapted by the KÄRCHER Customer Service.

The following limit values apply to the water supply:

• pH value: 6.5-9.5

• Electrical conductivity: Conductivity of fresh water + 1200 µS/cm, maximum conductivity 2000 µS/cm

• Settleable particles (sample volume 1 l, settling time 30 minutes): < 0.5 mg/l

• Filterable particles: < 50 mg/l, no abrasive substances

• Hydrocarbons: < 20 mg/l

• Chloride: < 300 mg/l

• Sulphate: < 240 mg/l

• Calcium: < 200 mg/l

• Total hardness: < 28 °dH, < 50° TH, < 500 ppm (mg CaCO₃/l)

• Iron: < 0.5 mg/l

• Manganese: < 0.05 mg/l

• Copper: < 2 mg/l

• Active chloride: < 0.3 mg/l

• Free of unpleasant odours

The packing materials can be recycled. Please dispose of packaging in accordance with the environmental regulations.

Electrical and electronic devices contain valuable, recyclable materials and often components such as batteries, rechargeable batteries or oil, which - if handled or disposed of incorrectly - can pose a potential danger to human health and the environment. However, these components are required for the correct operation of the device. Devices marked by this symbol are not allowed to be disposed of together with the household rubbish.

Current information on content materials can be found at: www.kaercher.de/REACH

Only use original accessories and original spare parts. They ensure that the appliance will run fault-free and safely.

Information on accessories and spare parts can be found at www.kaercher.com.

Check the contents for completeness when unpacking. If any accessories are missing or in the event of any shipping damage, please notify your dealer.

• It is essential that you read the safety instructions 5.951-949.0 before initial start-up.

• Observe the national regulations for liquid jet cleaners.

• Observe the national accident prevention regulations. Liquid jet cleaners must be tested regularly. The test result must be recorded in writing.

• Do not modify the device or accessories.

The safety lever on the high-pressure gun prevents the device from being switched on inadvertently.

If the high-pressure gun is closed, the overflow valve opens and the entire water volume will flow back to the pump suction side.

The overflow valve is set by the manufacturer and sealed. Setting shall only be carried out by Customer Service.

The safety valve opens if the pressure relief valve is faulty.

The safety valve is set and sealed at the factory. The adjustment is made by Customer Service.

The thermostat valve opens when the maximum permissible water temperature is exceeded and discharges the hot water outdoors.

• Control elements for the cleaning process are yellow.

1. Check the contents of the package when unpacking.

2. Notify the dealer immediately in the case of shipping damage.

1. Place the device on a flat and level surface.

2. Check the high-pressure pump oil level at the oil level indicator.

   The oil level must be in the middle of the oil level indicator.

3. Top up the oil if necessary. For oil type, see ChapterTechnical data.

1. Before initial start-up of the engine, read the original instructions for the engine and observe the safety instructions.

1. Check the oil level in the engine.

   Do not start up the device if the oil level is low.

2. Top up the oil if necessary. For oil type see ChapterTechnical data.

1. Open the fuel tank cap.

2. Fill the fuel tank with fuel.

3. Close the cap of the fuel tank.

4. Wipe up any spilled fuel.

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1. Union joint
2. Water filter
3. Arrow

1. Attach the water filter, the arrow must point to the pump.

2. Fasten the union joint on the pump.

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1. Put the push handle on the base frame.

2. Secure the push handle with the screws and nuts.

3. Push the wheels onto the axle.

4. Push the fastener onto the axle and tighten the screws.

1. Connect the spray lance to the high-pressure gun.

2. Install the nozzle with the nozzle screw at the spray lance.

3. Screw the high-pressure hose to the high-pressure gun.

4. Fasten the high-pressure hose to the high-pressure connection.

1. Check the feed pressure, input temperature and input amount of the water supply. See Chapter Technical data for the requirements.

2. Connect the system separator and water connection of the device with a hose (minimum length 7.5 m, minimum diameter 3/4”).

   The supply hose is not included in the scope of delivery.

3. Open the water inlet.

1. Open the water inlet.

2. Remove the high-pressure nozzle.

3. Start the engine according to the original instructions for the engine.

4. Allow the device to run until the escaping water is free of air bubbles.

5. Switch off the device.

6. Fit the high-pressure nozzle.

1. Open the water supply.

2. Start the engine with the high-pressure gun actuated according to the operating instructions of the engine manufacturer.

• Press the lever on the high-pressure gun as long as necessary until the engine starts.

1. Secure the high-pressure gun. To do so, push the safety lever towards the front.

2. Unscrew nozzle screws and remove the nozzle.

3. Put on a new nozzle.

4. Screw on the nozzle screws and tighten them by hand.

1. Close the high-pressure gun to interrupt operation.

2. Open the high-pressure gun to continue operation again.

3. In case of extended interruptions (several minutes), switch off the engine.

4. Activate the high-pressure gun until the device is pressureless.

5. Secure the hand spray gun using the safety lever so that it doesn’t open accidentally.

   Note

   When the lever of the high-pressure gun is released, the engine continues to run at zero speed. The water thus circulates within the pump and gets heated.When the cylinder head at the pump has reached the maximum permissible temperature (65 °C), the therm-valve opens. Hot water is drained. Cold water will follow and cool the pump.

After operating the water using saline water (sea water), open the high-pressure gun and rinse the device for at least 2 - 3 minutes using tap water.

1. Set the engine switch to “OFF” and close the fuel valve.

2. Shut off the water supply.

3. Activate the high-pressure gun until the device is pressureless.

4. Press the safety lever of the high-pressure gun to secure the lever of the pistol against being released accidentally.

5. Remove the water inlet hose from the device.

1. Place the spray lance with the high-pressure gun on the hooks.

2. Coil up the high-pressure hose and hang it over the hook.

3. Push the push handle down, and pull / push the device.

4. When transporting the device in vehicles, secure the device against shifting and tipping over.

Store the device indoors only.

If frost-free storage is not possible:

1. Drain excess water.

2. Pump commonly available anti-freeze through the device.

3. Allow the device to run for a maximum of 1 minute until the pump and lines are empty.

You can agree on regular safety inspections or close a maintenance contract with your dealer. Please seek advice on this.

• Check the high-pressure hose for damage.

  Immediately replace a damaged high-pressure hose.

• Check the device for leaks.

  3 drops of water per minute are permissible. Contact Customer Service in the case of more serious leaks.

1. Check the oil level of the engine and pump. Contact Customer Service if the oil is milky (water mixing with the oil).

2. Clean the water filter, see ChapterCleaning the water filter.

Replace the oil in the high-pressure pump.

1. Replace the oil in the engine.

2. Carry out maintenance tasks on the engine according to the specifications provided in the operating instructions of the engine.

Have the device maintained by Customer Service.

1. Shut off the water inlet.

2. Unscrew the filter cup.

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   1. Water filter
   2. Filter insert
   3. Filter chamber

3. Pull the filter insert downwards and off.

4. Clean the filter insert and filter cup.

5. Re-install the filter insert.

6. Screw on the filter cup again and tighten.

For the oil type and filling quantity, see ChapterTechnical data.

1. Provide a catch pan for at least 1 litre of oil.

2. Unscrew the oil drain plug.

3. Drain the oil into the catch pan.

4. Screw in the oil drain plug.

5. Slowly fill with new oil until the middle of the oil level indicator is reached. Air bubbles must be able to escape.

• Device does not start 

• Device does not reach required pressure 

• Pump leakingUp to 3 drops of water per minute are permissible. 

• Pump knocking 

Remedy:

• Follow operating instructions of the motor manufacturer!

• Contact Customer Service if necessary.

Remedy:

• Check operating speed of the motor.

• Check the size of the nozzle and compare with the required size specified in the chapterTechnical data.

• Vent the device, see ChapterVenting the device.

• Clean the water filter.

• Check the water supply volume and compare with the required volume specified in the chapterTechnical data.

• Clean all inlet pipes to the pump.

• Contact Customer Service if necessary.

Remedy:

• In case of more serious leaks, have the device checked by Customer Service.

Remedy:

• Clean the water filter.

• Check the water supply line for leaks.

• Vent the device, see ChapterVenting the device

• Contact Customer Service if necessary.

The warranty conditions issued by our relevant sales company apply in all countries. We shall remedy possible malfunctions on your appliance within the warranty period free of cost, provided that a material or manufacturing defect is the cause. In a warranty case, please contact your dealer (with the purchase receipt) or the next authorised customer service site.

(See overleaf for the address)

• HD 7/20 G Classic 

• HD 8/23 G Classic 

• HD 9/25 G Classic