Kärcher HD 5 12 User manual

New Unit Information
New Unit Information 02.2004
HD 5/12
1.514-101
5.905-972

New Unit Information 02.2004
Technicalfeatures HD 5/12
Page 2 / 12
Drive unit
– 2-pole, air-cooled electric motor.
Pump:
– 3-piston axial pump.
– Pistons made from stainless steel, Ø 12mm
(0.472 in), stroke 9.3mm (0.366 in).
– Cylinder head made from brass.
– Swash plate with thrust ball bearing.
– Pressure and suction valve made from
stainless steel and plastic.
– The pressure switch switches off the motor
when the handgun is closed.
– Injector.
– Non-return valve.
– No safety valve.
– No pressure gauge.
– No pressure and flow control valve.
– Water inlet with strainer.
Electrics:
– Unit switch with thermal motor protection.
– Pressure switch.
Cleaning agent:
– Without cleaning agent tank.
– Metering valve on the unit.
– Cleaning agent operation at low pressure.
Accessories:
– Standard gun.
– Curved spray lance.
– Triple nozzle.

New Unit Information 02.2004
HD 5/12 Unit functions
Page 3 / 12
View from the front
1 High-pressure hose
2 Handgun
3 Mains connecting plug
4 Spray lance
5 Wheel
6 Triple nozzle.
7 High-pressure connection
8 Water connection with strainer
9 Inspection window for oil level
10 Front cover
11 Unit switch
12 Retaining screw for front cover
13 Handle,heightadjustable
4
3
5
6
13
9
8
7
1
11
12
10
2

New Unit Information 02.2004
Unit functions HD 5/12
Page 4 / 12
Rear view
1 Handle,heightadjustable
2 Rear cover
3 Cleaning agent supply hose with filter
4 Wheel
5 Mains connection cable
6 Wheel
7 Cleaning agent metering valve
8 Clamping screw for adjusting handle
height
9 Handgun bracket
9
8
7
2
1
4
6
5
3

New Unit Information 02.2004
HD 5/12 Unit functions
Page 5 / 12
1 Electrical box
2 Unit switch
3 Cleaning agent hose
4 Mains connection cable
5 Cleaning agent connection with non-
return valve
6 High-pressure connection
View from the front, cover removed
7 Overflow valve
8 Pressure switch
9 Water connection with strainer
10 Cylinder head
11 Motor housing
12 Oil reservoir
1
2
3
4
5
6
9
10
11
12
7
8

New Unit Information 02.2004
Unit functions HD 5/12
Page 6 / 12
Electrical box
1 Unit switch
2 Cover
3 Capacitor
4 Connection cable with motor
Electrical box open
– Pull the retainer clips (arrows) outward and
remove the cover (2).
2
1
3
4

New Unit Information 02.2004
HD 5/12 Unit functions
Page 7 / 12
View from the rear, cover open
1 Rear cover
2 Bore markings
3 Screw holes
4 Clamping screw for adjusting handle
height
5 Mains connection cable
6 Cleaning agent supply hose
7 Cleaning agent metering valve
4
5
7
6
Rear cover open
– Pull the retainer clips (arrows) outward and
remove the cover (1).
22
1
33
Note:
If the retaining clips have broken repair as
follows:Drillthroughthetwoboremarkings
(2)inthecoverwithaØ5mmbit.Thecover
(1) can then be mounted with two screws
M5x20(7.303-108)inthescrewholes(3).

New Unit Information 02.2004
Unit functions HD 5/12
Page 8 / 12
View from below
61
2
1 High-pressure connection
2 Pressure switch
3 Cylinder head bolt
4 Suction cover
5 Cylinder head
6 Water connection with strainer
3
4
5

New Unit Information 02.2004
HD 5/12 Unit functions
Page 9 / 12
Motor
45789 11 12 13
15
16
17
1 Pressure switch
2 Pressure valve
3 Cleaning agent suction hose connection
4 High-pressure seal
5 Low-pressure seal
6 Oil seal
7 Piston
8 Swash plate with thrust ball bearing
9 Motor bearings
10 Shaft seal
123
610
18
19
20
11 Motor winding (stator)
12 Magnet (rotor)
13 Motor bearings
14 Fan wheel
15 Motor drive shaft
16 Motor housing
17 Piston housing
18 Water connection
19 Suction valve
20 Cylinder head
14

New Unit Information 02.2004
Unit functions HD 5/12
Page 10 / 12
1 Retainingplate
2 Pressure valve
3 Retainingplug
4 Non-return valve
5 Spring
6 Ball
7 Cleaning agent hose connection
8 Injector
9 High-pressure connection
10 Cylinder head
Cylinder head
11 Connection bore (pump pressure)
12 Connection bore (dynamic pressure)
13 Screw plug
14 Connection bore to pressure switch (only
indicated here)
15 Overflow valve
16 Valve seat
17 Water connection
18 Suction valves
19 Cylinder head screws
20 Piston
123 23 2 3
5
6
7
18
18
9
3
48
10
11
17
18
19
20 13
1516 14
12

New Unit Information 02.2004
HD 5/12 Troubleshooting
Page 11 / 12
Troubleshooting
Fault Solution
Unit not running – Check/replace mains voltage, connection cable and mains
fuse.
– Check/replace unit switch.
– Check/replace pressure switch.
– Check/replace overflow valve.
– Check/replace motor.
Unit does not become
pressurised – Check/increase water inlet volume.
– Clean/replace water inlet strainer.
– Bleed unit.
– Check/replace high-pressure hose.
– Check cylinder head for leaks and replace as necessary.
– Check/replace overflow valve.
Unit constantly switches on
and off with handgun closed – Check/replace handgun and o-rings at high-pressure hose
for leaks.
– Check/replace cleaning agent non-return valve.
– Check/replace pressure/suction valves for leaks.
– Check/replace overflow valve.
– Check/replace non-return valve.
– Check/replace pressure switch.
Unit won't switch off when
the handgun is closed – Check/replace overflow valve.
– Check/replace non-return valve.
– Check/replace pressure switch.
Cleaning agent is not drawn
in – Clean/replace cleaning agent non-return valve.
– Check/replace cleaning agent nozzle.
– Replace injector.
– Clean/replace cleaning agent strainer.
– Check replace metering valve.
Water escapes between the
cylinder head and piston
housing
– Check replace high-pressure and low-pressure seals.
Oil escapes between the
cylinder head and piston
housing
– Replace the oil seals.

New Unit Information 02.2004
Technicalspecifications HD 5/12
Page 12 / 12
Thetechnicaldatasheetandthecircuitdiagramwillbeincluded inthe nextissue ofthe spareparts
CD-ROM (DISIS) and are available in the Intranet.
Technical data sheet: Folder: „Central / Service Info Int’l / Technical Specifications“
Circuit diagram: Folder: „Central / Service Info Int’l / Circuit Diagram“
Ifrequired,theoperating instructionsand thesparepartslistscanbeorderedasa papercopy from
the spare parts service by quoting the relevant part number.
Special tool
Assembly tool (12mm) for high-pressure and oil seals 2.901-036
Tightening torque
Cylinder head bolt 23-27 Nm
Swash plate 12-15 Nm
Technical specifications
Unit Type Unit No. Circuit
diagram Operating instructions Maintenance booklet Spare parts list
HD 5/12
(220-240 Volt / 50 Hz) 1.514-101 0.087-853 5.960-966 5.950-582 5.970-209