Kärcher HD 20/15-4 Service Manual Download | Manualshive

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English

5.906-494.0 Rev. 01 (04/11)

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HD 25/15-4, HD 20/15-4, HD 16/15-4
Service Manual

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Summary of Contents for HD 20/15-4

Page 1: ...English 5 906 494 0 Rev 01 04 11 1 HD 25 15 4 HD 20 15 4 HD 16 15 4 Service Manual...

Page 2: ...5 4 1 Pump diagram 10 5 4 2 Remove the crank drive 11 5 4 3 Cylinder head uninstall 12 5 4 4 Overflow 14 5 4 5 Regulate the working pressure by means of the rotary know on the gun 16 5 5 Electrical sy...

Page 3: ...6 2 2 Fault indication 23 6 3 Device is not building up pressure 23 6 4 High pressure side is leaky 23 6 5 High pressure pump is vibrating 23 7 Technical specifications 24 7 1 Technical Documentation...

Page 4: ...ons or damage to property 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 a...

Page 5: ...ter 3 Pump 4 Overflow casing and pressure regulation 5 Accessory compartment 6 Strut for crane loading 7 Push handle 8 Appliance electronics electric box appliance switch 9 Storage hook for cables and...

Page 6: ...p 10 Valve screws pressure side 11 Pump head fastening screws 12 Valve screws suction side 1 Oil drain screw 2 Oil sight glass 3 Connecting flange for drive motor pump 4 Electro motor 5 Drive motor co...

Page 7: ...Rev 01 04 11 7 1 Water filter 2 Water inlet 3 Oil drain screw 4 Oil sight glass 5 High pressure outlet 6 Accessory compartment 1 Indicator lamp 2 Power switch 3 Intake for hourmeter option 4 5 Front...

Page 8: ...8 English 5 906 494 0 Rev 01 04 11 1 Lock detent 2 Accessory compartment 3 Information sign 4 Hinge storage compartment 5 Cover 6 Lock pin 7 Type plate appliance 4 7 View from the inside...

Page 9: ...filter for contamination clean if required Assemble it back in the reverse sequence Unscrew the oil drain screw and collect used oil Replace washers of the oil drain screw Screw in the oil drain screw...

Page 10: ...10 English 5 906 494 0 Rev 01 04 11 Let the high pressure pump tilt down Note Oil can leak during this tilting process Remove the high pressure pump from the electric motor...

Page 11: ...15 Piston rod screw 16 Oil bath 17 Crankshaft housing cover with O ring 18 Crankshaft bearing 1 x left 1 x right 19 Oil fill container 20 Distance labyrinth discs 21 Crown nut 22 Disc 23 Low pressure...

Page 12: ...om the crankshaft cas ing Pull out the piston with the push rods from the crankshaft casing Remove the oil seal rings using a special pliers 1 Oil fill container 2 Pump casing 3 Crankshaft bearing cov...

Page 13: ...ut the cylinder head using both hands The removed cylinder head cross section seal setup see pump diagram 1 Crown nut 2 Disc 3 Low pressure seal 4 Support ring low pressure seal 5 Support disc brass 6...

Page 14: ...O ring 21 Spring plate bottom 22 Spring 23 Spring plate top 24 Sphere 25 Lock nut adjustment screw low pressure 26 Adjustment screw low pressure 27 Spindle of the pressure quantity regulation 28 Adjus...

Page 15: ...w pressure 9 Spring 10 Housing overflow valve 11 Spring plate bottom 12 Manometer 13 Control piston 14 O ring 15 O ring 16 O ring 17 Valve seat 18 O ring 19 Valve bolt 20 Spring 21 Nozzle insert 22 O...

Page 16: ...pressure Turn the adjustment screw high pressure so that the pressure display on the test manometer equals the maximum working pressure in the Chapter Specifications Secure the adjustment screw for h...

Page 17: ...6 Gentle start electronics 7 Control transformer fuse 2 0 AT 8 Cover of switchbox Loosen 4 screws and remove the lid of the casing Carefully pull the indicator lamp out of the socket in the lid and p...

Page 18: ...contact blinks red twice Switch off and locking of the machine if the wind ing protection contact opens Over or under voltage current asymmetry blinks red thrice Switch off and locking of the machine...

Page 19: ...play Run lights up after the motor has been started Possible reasons for malfunctions of the gentle start electronics Overvoltage of the voltage supply more than 27V Multiple motor starts per minute 3...

Page 20: ...ISIS 1 Support ring 2 O ring Unscrew all fastening screws Remove the half of the handle shell The open gun trigger lock removed Remove the lever press out the pin on the joint Unscrew the locking scre...

Page 21: ...amic disc on spray pipe side 2 Ceramic disc on gun side The ceramic disc on the gun side is rigidly connected to the gun connection The ceramic disc on the spray pipe side is connected to the regulato...

Page 22: ...ety pin 6 coupling 7 Spring 8 Valve ball 9 Piston 10 Spray pipe connection 11 O rings support ring When this lever is actuated the valve ball is pressed against the spring toward the bottom by the pis...

Page 23: ...sure hose hose connections and hand spray gun for leaks 2x blinking red Engine overload overheat Set the appliance switch to 0 Allow device to cool down Set the appliance switch to I Water pressure is...

Page 24: ...nce data Working pressure appliance manometer MPa bar 3 15 30 150 3 15 30 150 3 15 30 150 Servopress pressure manometer on the ap pliance outlet MPa bar 14 8 148 15 150 15 3 153 Max permissible pressu...

Page 25: ...ngs and seats 4 901 062 0 Inner driver diameter 14 5 to 18 5 mm 6 815 013 0 Installation mandrel high and low pressure seal 6 815 211 0 Installation sleeve high pressure seal 6 815 214 0 Installation...

Page 26: ...15 4 Gear cover 11 Nm Hollow screws on cylinder head 50 Nm Valve screws 200 Nm Cylinder head screws 40 Nm Piston screws 15 Nm Oil drain screw 40 Nm Crankshaft bearing cover screws 25 Nm Piston rod scr...

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