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Karcher HDS 8/18-4 C Classic High Pressure Washer


The three-phase Karcher HDS 8/18-4 C Classic High Pressure Washer is the most powerful hot water high-pressure cleaner in the Compact Class. With 4-pole, water-cooled electric motor and eco!efficiency mode.


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The Karcher HDS 8/18-4 C Classic High Pressure Washer is the most powerful hot water high-pressure cleaner in our HDS Compact class. The three-phase machine with 4-pole, water-cooled electric motor offers everything you could expect when it comes to ease of use, ergonomics and efficient use of resources. Users will be impressed by features like the simple single-button operation and the high level of mobility provided by the large wheels and steering roller. While the EASY!Force high-pressure gun makes use of the recoil force of the high-pressure jet to reduce the holding force to zero, the EASY!Lockquick-release fasteners enable handling that is five times faster than with conventional screw connections, without losing any robustness or longevity. The hard-wearing chassis ensures optimum safety, as the tanks for cleaning agents and fuel are securely integrated. Handy storage compartments for accessories and tools completethe wide range of features offered by the HDS 8/18-4 C Classic.


Technical data

Current type (Ph/V/Hz) 3 / 400 / 50
Flow rate (l/h) 300 – 800
Working pressure (bar/MPa) 30 – 180 / 3 – 18
Max. temperature (supply 12°C) (°C) 80 – 155
Connection load (kW) 6
Heating oil or gas consumption, full load (kg/h) 5
Power cable (m) 5
Fuel tank (l) 15
Weight (kg) 120.8
Dimensions (L × W × H) (mm) 1060 x 650 x 920


  • Spray gun, EASY!Force Advanced
  • High-pressure hose, 10 m
  • Spray lance, 1050 mm
  • Power nozzle
  • Soft Damping System (SDS)
  • Pressure cut-off
  • Integrated fuel and detergent tank

Features & Benefits



  • eco!efficiency mode – efficient and environmentally friendly, even when used for prolonged periods.
  • Reduces fuel consumption and CO2 emissions by 20%.
  • Accurate cleaning agent dosing unit with clear rinse function.

Ease of use

  • Intuitive operation thanks to the large single-button selector switch.
  • Large tank opening with filling chute.
  • Tanks for cleaning agent, calcification protection and fuel can be conveniently filled from outside without opening the hood.


  • Lockable accessory compartment for nozzles, tools, etc.
  • Storage hooks for power cable and high-pressure hose. Integrated lance holder for transport.


  • The Soft Damping System (SDS) compensates for vibration and pressure peaks in the high-pressure system.
  • Large water filter protects pump against damage.
  • Water softening system protects the heating coil against calcification damage.


  • “Jogger” design with large wheels and steering roller.
  • Large integrated handles in the chassis.
  • Integrated tilting aid for effortlessly negotiating obstacles such as steps and kerbs.

Save time and effort: EASY!Force high-pressure gun and EASY!Lock quick-release couplings

  • Effortless operation at last: the EASY!Force high-pressure gun.
  • EASY!Lock quick-release couplings: durable and robust. And five times faster than screws.

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