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Kärcher HD 20/15-4 Service Manual

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HD 25/15-4, HD 20/15-4, HD 16/15-4
Service Manual
1
English 5.906-494.0 Rev. 01 (04/11)

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  Also See for Kärcher HD 20/15-4

  Summary of Contents for Kärcher HD 20/15-4

  • Page 1 HD 25/15-4, HD 20/15-4, HD 16/15-4 Service Manual English 5.906-494.0 Rev. 01 (04/11)
  • Page 2: Table Of Contents

    4.3 Pump Detail (HD 25/15-4) ........4.4 Pump Detail (HD 20/15-4 und HD 16/15-4)......
  • Page 3 10.2 HD 20/15-4 ........
  • Page 4: Preface

    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) – English 5.906-494.0 Rev. 01 (04/11)
  • Page 5: Attachment Sets

    3.7 Attachment sets 4.1 Type and information plates The type and information plates are located: Attachment kit Order number  on the pump casing (pump specifications)  in the accessories compartment (tyre pressure, Swivel casters 2.851-042.0 nozzle size and oil types used) Hose drum 2.440-002.0 ...
  • Page 6: Pump Detail (Hd 25/15-4)

    5 Overflow casing, pressure regulation 11 Pump head fastening screws 6 Oil tank 12 Valve screws, suction side 4.4 Pump Detail (HD 20/15-4 und HD 16/15-4) 1 Oil drain screw 9 Overflow casing, pressure regulation 2 Oil sight glass 10 Water inlet...
  • Page 7: Front View

    4.5 Front view 1 Water filter 4 Oil sight glass 2 Water inlet 5 High-pressure outlet 3 Oil drain screw 6 Accessory compartment 4.6 Rear view 1 Indicator lamp 3 Intake for hourmeter (option) 2 Power switch English 5.906-494.0 Rev. 01 (04/11)
  • Page 8: View From The Inside

    4.7 View from the inside 1 Lock detent 2 Accessory compartment 3 Information sign 4 Hinge, storage compartment 5 Cover 6 Lock pin 7 Type plate, appliance English 5.906-494.0 Rev. 01 (04/11)
  • Page 9: Basic Settings And Service Procedures

    Basic settings and service procedures Service work on the appliance may only be per- 5.3 Removal of the crankshaft pump formed by the authorized customer service. If so in- Drain the oil in a collection basin. structed in the operating instructions, the special tools indicated by KÄRCHER must be used.
  • Page 10  Let the high pressure pump tilt down. Note Oil can leak during this tilting process.  Remove the high pressure pump from the electric motor. English 5.906-494.0 Rev. 01 (04/11)
  • Page 11: Removal Of The Crankshaft Pump

    5.4 Removal of the crankshaft pump 5.4.1 Pump diagram 1 Valve screw, suction side, with O-ring 24 Support ring, low pressure seal 2 Suction valve 25 Brass support disc 3 Disc 26 Disc 4 Piston 27 High pressure seal 5 Guide sleeve 28 Support ring, high pressure seal 6 Piston screw 29 Valve screw, pressure side, with O-ring...
  • Page 12: Remove The Crank Drive

    5.4.2 Remove the crank drive  Unscrew the cylinder head. The exact procedure is described in the Chapter "Removing the cylin- der head".  Unscrew the pistons from the push rods.  Unscrew the oil drain screw and collect oil. ...
  • Page 13: Cylinder Head, Uninstall

    Grease the inside of the motor shaft with copper – paste. Grease the outside of the crankshaft with copper – paste. Order no. copper paste (100g): 6.869-087.0 5.4.3 Cylinder head, uninstall  Loosen the two fastening screws of the overflow (HD 25/15-4) 1 Valve screw, suction side 2 Fastening screws...
  • Page 14: Overflow

    5.4.4 Overflow Overflow setup 22 Spring 1 Screw socket 23 Spring plate, top 2 O ring 24 Sphere 3 O ring 25 Lock nut, adjustment screw, low pressure 4 Nozzle insert 26 Adjustment screw, low pressure 5 Manometer 27 Spindle of the pressure/quantity regulation 6 Screw connections 28 Adjustment screw, high pressure 7 Spring...
  • Page 15 Cross section of the overflow 21 Nozzle insert 1 Turning handle 22 O ring 2 Lock nut, adjustment screw, high pressure 23 Screw socket 3 Adjustment screw, high pressure 24 O ring 4 Spindle, pressure and quantity regulation 25 O ring 5 Spring plate, top 26 Spring 6 Sphere...
  • Page 16: Regulate The Working Pressure By Means Of The Rotary Know On The Gun

    equals the maximum working pressure in the Chapter "Specifications".  Secure the adjustment screw for high pressure by tightening the locknut.  Seal the adjustment screw for high pressure and the lock nut with locking paint. Setting the minimum working pressure: ...
  • Page 17: Electrical System

    5.5 Electrical system Warning When working on the device, please always use the current circuit diagram in Kärcher-Inside. 1 Power contactor 5.5.2 Remove the appliance switch rotary knob 2 Terminal strip 3 Terminal strip protective conductor 4 Motor protection electronics 5 Fuse F1 (1.0 AT) 6 Gentle start electronics 7 Control transformer (fuse 2.0 AT)
  • Page 18: Functional Description Of The Motor Protection Electronics

     The resistance to spray water is ensured by a seal Display of the indicator lamp: on the shaft. Blinking Colour Meaning  Loosen the 4 fastening screws.  Disconnect the cable connections. Green Operation, voltage present, no  Remove the appliance switch. faults ...
  • Page 19: Simple Function Test Of The Motor Protection Electronics Without Appli- Ance

    Assemble it back in the reverse sequence.  The disc must be under the safety bow. 5.6 Gun and spray pipe HD 20/15-4 and 20/ 15-4 The illustration might differ from the gun on your model, however, the procedure is still the same.
  • Page 20: Disassemble Hand Spray Gun

    5.6.1 Disassemble hand spray gun The hand spray gun can be disassembled to replace seals or wear parts.  Remove the lever; press out the pin on the joint. Hand-spray gun  Unscrew the locking screw; use a 12 mm hexagon socket wrench.
  • Page 21: Adjustments On The Power Press Regulator

    5.6.2 Adjustments on the power press regulator The removed piston with springs and seal set  Adhere to the sequence of the seal set and the springs when assembling. 1 Ceramic disc on spray pipe side 2 Ceramic disc on gun side The ceramic disc on the gun side is rigidly connected ...
  • Page 22: Gun Hp

    5.8 Changing Wheels  Remove the quick connect with pliers. The quick Longitudinal section of the power press regulator connect cannot be reused. 1 Gun connection 2 Connecting pin 3 Ceramic disc on gun side 4 Ceramic disc on spray pipe side 5 Casing of rotating regulator 6 Handle of rotary regulator 7 Spray pipe connection...
  • Page 23: Troubleshooting

    Troubleshooting  Ensure adequate water line pressure. 6.1 Appliance is not running  3x blinking red: No power – Fault in the voltage supply –  Check whether the voltage indicated on the type  Check main connections and mains fuse. plate corresponds to the voltage of the socket.
  • Page 24: Technical Specifications

    Technical specifications Type HD 25/15-4 HD 20/15-4 HD 16/15-4 Power connection Voltage Current type 3~50 3~50 3~50 Connection output 11,5 Current pickup, full load (after 1 minutes) <25 <21 <16 Mains fuse (slow-blow) Maximum allowed net impedance (0,072+j0,045) (0,072+j0,045) (0,072+j0,045) Water connection Max.
  • Page 25: Technical Documentation

    Appliance type Order number Circuit diagram operating instruc- Spare parts list tions HD 25/15-4 Cage 1.367-121.0 0.089-091.0 5.963-304.0 5.971-040.0 HD 20/15-4 Cage 1.367-131.0 0.089-091.0 5.963-304.0 5.971-077.0 HD 16/15-4 Cage 1.367-105.0 0.089-091.0 5.963-304.0 5.971-077.0 Circuit diagram The status of the attached circuit diagram represents the creation date of the service manual.
  • Page 26: Tightening Torques

    Crankshaft bearing cover screws 25 Nm Crankshaft bearing cover screws 18-22 Nm Piston rod screws 18-22 Nm Piston rod screws 18-22 Nm 10.2 HD 20/15-4 Gear cover 11 Nm Hollow screws on cylinder head 50 Nm Valve screws 200 Nm Cylinder head screws...

This manual is also suitable for:

Hd 25/15-4Hd 16/15-4