Preface; Safety Instructions; Hazard Levels; Technical Features - Kärcher HD 20/15-4 Service Manual

1

Preface

Good service work requires extensive and practice-
oriented training as well as well-structured training
materials.
Hence we offer regular basic and advanced training
programmes covering the entire product range for all
service engineers.
In addition to this, we also prepare service manuals
for important appliances - these can be initially used
as instruction guides and later on as reference
guides.
Apart from this, we also regular information about
product enhancements and their servicing.
If you should require supplements, have corrections
or questions regarding this document, please ad-
dress these citing the following subject to:
international-service@de.kaercher.com
Subject:
The responsible product specialist will take care of
your issue.
Copying and duplication of texts and diagrams as
well as third-party access to this information is
permitted only with the explicit permission of the
company:
Alfred Kärcher GmbH & Co. KG
P O Box 160
D -71349 Winnenden
www.kaercher.com
2

Safety instructions

2.1 Hazard levels

Danger
Immediate danger that can cause severe injury or
even death.
Warning
Possible hazardous situation that could lead to se-
vere injury or even death.
Caution
Possible hazardous situation that could lead to mild
injury to persons or damage to property.
4
English 5.906-494.0 Rev. 01 (04/11)
Fall 108234
3

Technical Features

3.1 Validity

This service manual applies to the following applianc-
es:

HD 25/15-4 (1.367-121.0)

HD 20/15-4 (1.367-131.0)

HD 16/15-4 (1.367-105.0)
The procedure for service work is the same for all
three models. Device-specific features are empha-
sized in the text.

3.2 Pump

3 piston crankshaft pump
–
Stainless steel piston with ceramic sleeves
–
Cylinder head made of brass
–
Pressure and suction valves made of stainless
–
steel, valve cages made of plastic
Built-in large water filter protects the pump from
–
contamination. The filter can be easily removed
and cleaned
Oil level can be checked from the outside
–

3.3 Drive

4-pin, air-cooled three-phase motor with 1400
–
rpm.

3.4 Electrical system

Automatic safety switch-off after 30 minutes of
–
non-operation
Winding protection contact
–
The pressure switch on the overflow switches the
–
motor contactor
Soft start increases the motor speed gradually to
–
1,400 1/min and protects the circuit from over-
loads when switched on (HD 25/15-4)
Electronics in spray water protected casing.
–

3.5 Frame

HD 25/15-4
HD 20/15-4
HD 16/15-4
3.6

Accessories

Power nozzle, 25° spray angle
–
Dirt grinder
–
High pressure hose, NW 12 15 m (HD 25/15-4
–
and HD 20/15-4)
High pressure hose NW 10 15 m (HD 16/15-4)
–
Gun EasyPress (HD 16/15-4)
–
Gun 300 bar (HD 20/15-4 and HD 25/15-4)
–
Stainless steel
Steel, painted
Steel, painted