Technical Features; Drive; Pump; Detergent System - Kärcher HD 6/16-4 M / MX Service Manual

4

Technical Features

These devices are the new top models among the mobile
high-pressure cleaners of the mid-range. Their compact
and vertical design allows easy handling and space-saving
storage.
4.1

Drive

4-pin, electro mo- Cooling
tor
HD 6/16-4 M/MX Air-cooled
HD 7/18-4 M/MX Air-cooled
HD 9/20-4 M/MX Water-cooled 1400
Note
HD 7/18-4 M/MX
Pressure switch control with 2-phase switching.
2-pin, electro mo- Cooling
tor
HD 9/19 M/MX Air-cooled
4.2

Pump

3 piston axial pump with stainless steel piston
–
Piston with ceramic coating, with HD 9/20 only
–
Cylinder head and water inlet made of brass
–
High-pressure and suction valves made of stainless
–
steel
Direct shutoff with closed gun via pressure switch con-
–
trol
Overflow valve for pressure and quantity regulation
–
Control injector
–
Pressure holding valve
–
Manometer
–
Device Piston diam-
eter in mm
HD 6/16-4 M/MX 16
HD 7/18-4 M/MX 18
HD 9/19 M/MX 16
HD 9/20-4 M/MX 20
4.3

Detergent system

Detergent injector
–
Detergent check valve
–
Switch CHEM system, continuously adjustable 2-way
–
dosing valve at the back of the device.
4.4

Electrical system

Power switch with overload protection
–
Pressure switch control
–
Note
HD 7/18 devices only
Pressure switch control with 2-phase switching
–
4
English 5.906-246.0 Rev. 01 (09/14)
rpm Voltage/cur-
rent type
1400 230 V / 1~ /
50 Hz
1400 400 V / 3~ /
50 Hz
400 V / 3~ /
50 Hz
rpm Voltage/cur-
rent type
2800 400 V / 3~ /
50 Hz
Special features
Piston with piston
domes
Piston with piston
domes
Piston with piston
domes
Piston with piston
shoes