The Kärcher HDS 10/21-4 Classic is a powerful middle-class hot water pressure washer designed for intensive professional use in agriculture, construction, transport, and industrial environments. Combining high cleaning performance with robust construction and simple operation, it delivers reliable results even under the toughest working conditions.

Powerful Hot Water Cleaning Performance

Delivering up to 235 bar working pressure and a high flow rate of up to 16l/min, the HDS 10/21-4 Classic removes heavy grease, oil, mud, and stubborn contamination quickly and efficiently. Its hot water cleaning capability significantly improves cleaning speed while reducing detergent consumption.

Durable 4-Pole Water-Cooled Motor

At the heart of the machine is a reliable slow-running 4-pole water-cooled electric motor, paired with a high-quality crankshaft pump. This combination ensures long service life, reduced wear, and dependable performance during continuous professional operation.

Rugged Industrial Construction

Built for harsh environments, the HDS 10/21-4 Classic features a heavy-duty tubular steel frame that protects the machine against impacts and rough handling on construction sites and industrial premises. The open-frame design also provides excellent access for servicing and maintenance.

Efficient Burner Technology

Kärcher’s efficient burner system delivers strong heating performance with low emissions and economical fuel consumption. The integrated 30-litre fuel tank allows long operating periods, while eco!efficiency mode operates at an efficient 60°C setting with full water flow to reduce running costs.

EASY!Lock Accessory System

The machine is equipped with Kärcher’s EASY!Lock connection system, enabling faster setup, easier accessory changes, and secure leak-free connections compared to traditional threaded fittings. The robust Classic accessories are designed for long-term professional use.

Excellent Mobility & Site Handling

Large puncture-proof wheels and an integrated crane hook make transport easy, even across uneven terrain or construction environments. The compact design also helps simplify loading, unloading, and storage.

Key Features

• Genuine Kärcher part: 1.030-911.0
• 210 bar working pressure
• Max pressure: 235 bar
• High water flow rate: 350–1000 l/h
• Reliable 4-pole water-cooled motor
• Durable crankshaft pump
• Efficient hot water burner system
• eco!efficiency mode for reduced fuel consumption
• Heavy-duty tubular steel frame
• EASY!Lock quick-connect system
• Large puncture-proof wheels and integrated crane hook
• Power supply: 400V 3-phase

Ideal For

• Construction and plant equipment cleaning
• Agriculture and farm machinery
• Transport and fleet washing
• Industrial and manufacturing environments
• Heavy-duty commercial cleaning applications