– 7 DangerRisk of injury by inadvertent startup of ap-pliance and electrical shock.First pull out the plug from the mains beforecarrying out any tasks on the machine.NotePlease dispose off used oil only in the col-lection points provided for them. Pleasehand over old oil, if any, only at such plac-es. Polluting the environment with used oilis a punishable offence.You can sign with your dealer a contract forregular safety inspection or even sign amaintenance contract. Please take adviceon this matter. Check connection cable for damages(risk of electrical shock); get the dam-aged connection cable replaced imme-diately by an authorised customerservice person/ electrician. Check the high pressure hose for dam-ages (risk of bursting).Please arrange for the immediate ex-change of a damaged high-pressurehose. Check appliance (pump) for leaks.3 drops per minute are permitted andcan come out from the lower side of theappliance. Call Customer Service ifthere is heavy leakage. Check oil level Please contact Custom-er Service immediately if the oil is milky(water in oil). Clean water filter. Oil change.NoteSee "Technical Details" for details of oilquantity and type. Open the device hood. Unscrew oil drain plug. Drain the oil in a collection basin. Fix in the oil drain screw and tighten it.Torque 20...25 Nm. Turn the oil fill screw out. Fill in new oil slowly; air bubbles shouldgo out.The oil level must be at the centre of theoil level display. Screw in oil filling screw. Close cover. DangerRisk of injury by inadvertent startup of ap-pliance and electrical shock.First pull out the plug from the mains beforecarrying out any tasks on the machine.Get the electrical components checked andrepaired only by authorised customer ser-vice persons.Contact an authorised customer serviceperson in case of problems not mentionedin this chapter or if you are in doubt or whenyou have been explicitly asked to do so. Check connection cable for damages. Check the supply voltage. Call Customer Service in case of elec-trical defects.Care and maintenanceSafety inspection/ maintenancecontractBefore each useWeeklymonthly or after 500 operatinghoursOil changeTroubleshootingAppliance is not running21EN

power connection

electrical connection

frost protection

before each use

Kärcher HD 6/15-4 Operating Instructions Manual

Preface

Type plate

Parts of the system

Basic settings and service procedures

Motor

Cylinder head

Remove the appliance cover

Clean water filter

Removing the pressure switch

Replacing the high and low pressure gaskets

Installing the cylinder head

Replacing the valves

Checking the overflow valve

Adjusting the overflow valve

Check / replace the mechanics of the pressure switch

Dismantling the pump

Dismantling the drive

Dismantling the crankshaft

Installing the crankshaft

Open the electric casing

Replacing the mains cable

Access to the terminal box of the electric motor

Replacing the electric motor

Troubleshooting

Technical Documentation

Special tools

Circuit diagram

HD 6/15-4

Safety instructions

Proper use

Start up

Operation

Spare parts

Technical specifications

HD 7/11-4

HD 7/18-4

HD 9/20-4

Kärcher HD 6/15-4 Operating Instructions Manual

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