The HD 10/21-4 S is a 3-phase machine with a 4-pole, long-life water cooled motor, robust 3-piston axial pump with brass cylinder head and ceramic pistons, perfect for tough continuous daily applications. Ideal for daily cleaning of main deck,  excellent choice for cargo holds cleaning, regardless cargo with its high water flow rate of up to 1,000 litres/hour and pressure of up to 210 bar. Can be used with salt water and fress water as well, like all High-pressure cleaners of Karcher.

Features and benefits

Proven Kärcher quality
  • Four-pole, water-cooled electro motor.
  • Robust brass cylinder head and ceramic piston.
  • Reinforced, break-resistant plastic chassis.
Hose storage
  • Mounted on both sides; for 20 m high-pressure hose.
  • Hose guide under the machine; high safety against tilting.
  • For convenient and fast attachment/removal.
For increased safety
  • Integrated electronics system for machine monitoring.
  • Switch-off in the case of overvoltage or low voltage range.
  • Switch-off in the case of leaks or phase failure.
Outstanding mobility
  • Large rubberised wheels for uneven surfaces, stairs and half landings.
  • Tried-and-tested sack truck principle for easy, ergonomic transport.
  • Large wheels for uneven surfaces and half landings.



Technical data

Operating pressure max (bar)210
Flow rate max (l/h) 1000
Flow rate min (l/h)
Max. water feed temperature (°C) 60
Power rating (kW)7,8
Voltage (V)220
Number of current phases (Ph)3
Frequency (Hz)60
Weight (kg)62
Dimensions (LxWxH) (mm)560x500x1090
Detergent tank (l)6


Operating manual
Safety instructions
Service Handbook
Modification Instructions


1 2 3 4 5 6 7 8 9 10 11 12 13

Cleaning Agents

Related Products