The Karcher HD 10/21-4 S ST Classic High Pressure Cleaner provides the perfect combination of high-performance cleaning with ultra-simple operation, maintenance and installation of its steel frame to the wall or floor. This is down to the machine’s 8 kW motor output, which produces up to 210 bar working pressure and delivers an hourly flow rate of 1000 litres. Hard at work beneath the ultra-robust steel frame are the strong, easy-to-adjust crankshaft pump with its high-quality brass cylinder head and the low-speed 4-pole motor with automatic shutoff and air/water cooling. This ensures consistent, long-lasting and reliable operation. Plus, an easy-to-clean water filter reliably protects the pump from dirt. Rounded off with a comprehensive range of accessories included as standard – trigger gun, lance, 10-meter high pressure hose and power nozzle, all featuring the innovative EASY!Lock quick-release couplings for speed and ease – the HD 10/21-4 S Classic is the ideal choice for tough working conditions.
Powerful and robust crankshaft pump with brass cylinder head and pistons with ceramic sleeves
High performance and high efficiency. Long service life and low maintenance costs. With suction feature and up to 60 °C water temperature.
Robust, stationary chassis
A robust tubular steel frame reliably protects the machine against damage. Sturdy tubular steel frame protects all components. Integrated storage space for accessories.
Classic accessories with EASY!Lock connections
Quick set-up and pack-up plus easy accessory replacement. Robust and durable accessories. Easy to use
Clear machine design
Large water filter to protect the pump.
Pressure and water volume can be adjusted on the pump itself.
Filling level and quality of the oil can be checked easily using the inspection glass and dipstick.
4-pole low-speed motor with air-water cooling system
Tried-and-tested high-quality Kärcher components guarantee a long lifetime.
For high performance and low maintenance costs.
Built to last, high reliability.
Intuitive operation and simple maintenance
Integrated water filter can be removed and cleaned without any tools.
Good accessibility for easy service and maintenance.
Simple operation.
High flexibility
The extensive accessory line provides for ergonomic and economical cleaning solutions for numerous applications.
Extensive range of accessories for a wide range of applications.
Minimum installation effort.
Technical data
| Number of current phases (Ph) | 3 |
| Voltage (V) | 376 – 424 |
| Frequency (Hz) | 50 |
| Flow rate (l/h) | 500 – 1000 |
| Inlet temperature (°C) | 60 |
| Working pressure (bar) | 50 – 210 |
| Max. pressure (bar) | 270 |
| Connected load (kW) | 8 |
| Power cable (m) | 5 |
| Nozzle size | 050 |
| Water inlet | 1″ |
| Colour | anthracite |
| Weight (with accessories) (kg) | 50,2 |
| Weight incl. packaging (kg) | 55,9 |
| Dimensions (L × W × H) (mm) | 720 x 522 x 418 |
Scope of supply
- High-pressure hose length: 10 metre
- High-pressure hose specification: DN 8, 315 bar
- Spray lance: 840 mm
- Power nozzle
Equipment on the Karcher HD 10/21-4 S ST Classic High Pressure Cleaner
- Crankshaft pump with ceramic pistons
- 4-pole three-phase motor with air and water cooling
- Pressure cut-off
- Integrated water fine filter
- Sight glass for oil level
- Brass water inlet
Application areas
Cleaning animal stables in agriculture
Ideal for car dealerships, car hire companies and service stations
Vehicle and machine cleaning in the automotive, industrial and agricultural sectors
Cleaning tractors, machines and implements in agriculture
High-pressure cleaning of machines and equipment in the construction, agricultural and municipal sectors
For cleaning production halls, warehouses and logistics halls, as well as loading areas
Ideal for diverse applications in the transport and logistics sector
Industry
Agriculture
