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Kärcher HD 10/21-4 St repair times and service schedule

Kärcher HD 10/21-4 St: 250 bar · 16.7 l/min · cold water, electric static / wall mounted pressure washer. Below are the recommended service intervals and guide labour times. The annual service takes about 1 h 30 min.

Specifications

TypeCold water, electric
FormatStatic / wall mounted
Working pressure210 bar
Max pressure250 bar
Flow rate16.7 L/min (1000 L/h)
Connected load7.5 kW
Supply230 V 3~
Max temperature60 °C
StatusCurrent model
Model codeHD-10-21-4-ST

Service schedule and repair times

Every 6 months

OperationGuide timeHours
Inlet Water Filter Clean / Replace5 min0.08 h

Every 12 months

OperationGuide timeHours
Nozzle Set Replacement10 min0.17 h
Pump Oil Change15 min0.25 h
Annual Service — Heavy Duty (160 bar+)1 h 30 min1.5 h
Hose Reel Service / Replacement45 min0.75 h
Pipework and Wash Point Inspection1 h1 h
Annual Service — Static Cold Water2 h2 h

Every 24 months

OperationGuide timeHours
2-Year Major Overhaul — Static5 h5 h

Repairs (as required)

OperationGuide timeHours
Lance / Variable Nozzle ReplacementMembers
High-Pressure Hose ReplacementMembers
Trigger Gun ReplacementMembers
Unloader Valve ReplacementMembers
Motor Capacitor Replacement (single phase)Members
Pressure Switch / Microswitch ReplacementMembers
Check Valve Replacement (set)Members
Hose Reel Swivel RepairMembers
Diagnostic — Fault FindingMembers
Pump Seal Kit ReplacementMembers
Pump Replacement (exchange)Members
Motor ReplacementMembers
Pump Rebuild (full)Members
Break Tank Float Valve ReplacementMembers

Guide times are for a competent technician with the correct parts and tools, and exclude travel. Always follow the manufacturer's service documentation. Specifications: manufacturer data.

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