Kärcher ST 120 - User Manual

Questions and Answers

C
Curtis WilsonAug 6, 2025
What to do if air comes out of my Kärcher Power Tool, but no spray medium exits the nozzle?
- T
  Theresa MedinaAug 6, 2025
  If air is present but no spray medium is coming out of the nozzle, the spray medium may be wet or there may be a blockage. Try pressing the muzzle of the spray nozzle against a flexible base and pull the pistol trigger to redirect the air flow and clean the parts. If this doesn't work, clean the suction hose, suction pipe, and mixing chamber, or change the spray agent. Also, ensure external air isn't being sucked in by tightening the hose clips at the spray agent hose and closing the spray agent control.
K
Katherine AliAug 16, 2025
Why is there no water admixture in my Kärcher ST 120 Power Tool despite water supply?
- M
  Mary ChavezAug 16, 2025
  If there's no water admixture despite a water supply, first check that the selection switch for water is in the ON position and that the water volume control button is open. Also, ensure that the water pressure is greater than 0.2 MPa (2 bar). If these aren't the issue, the water system may be blocked. Dismantle the water hose without closing the water supply, dismount the injector, turn the water volume control button to maximum, press the muzzle of the air nozzle against a flexible base, and pull the pistol trigger to blow out the water system with compressed air. If the problem persists, dismount the water valve.
G
Gary DavisAug 26, 2025
How to fix no air in my Kärcher ST 120?
- F
  fcisnerosAug 26, 2025
  If there is no air in your Kärcher Power Tool, check the connection on the compressor and ensure the locking tap is open. A possible cause is a closed stop valve on the compressor. If the issue persists, the compressor may be defective and require repair.

Summary

Safety Instructions

General Safety Precautions

Covers hazards from jet direction, hazardous substances, material compatibility, and prohibited agents.

Protective Equipment & Regulations

Covers PPE, general regulations, and operator responsibility.

Specific Operational Safety

Covers enclosed spaces, flammable materials, unattended operation, and jet repulsion.

Proper Use

Application Examples & Agents

Lists application examples and suitable spraying agents.

Control Elements

Diagram and Descriptions

Lists and describes the various control parts of the jet pistol.

Safety Devices and Symbols

Operating Symbols

Explains symbols used in the manual for hazard warnings.

Operations

Jet Performance & Pressure

Details jet performance based on air quantity and operating pressure.

Setup and Operation

Covers attaching accessories, air/water connections, and operational steps.

Water Usage and Shutdown

Explains operation with water, rinsing, and shutdown procedures.

Care and Maintenance

Maintenance Schedule

Outlines daily, weekly, and monthly checks for wear and tear.

Component Replacement

Guides on replacing the mixing chamber and air nozzle.

Troubleshooting

Common Faults and Remedies

Lists common problems like no air, no spray medium, or water issues with solutions.

Specifications and Declarations

Technical Data

Provides detailed specifications for air supply, water connection, and performance.

EU Declaration of Conformity

Declaration of compliance with EU safety and health requirements.

Spare Parts and Warranty

Approved Spare Parts

Information on using only manufacturer-approved accessories and spare parts.

Warranty Terms

Details warranty conditions and how to make a claim.

Summary

Safety Instructions

General Safety Precautions

Covers hazards from jet direction, hazardous substances, material compatibility, and prohibited agents.

Protective Equipment & Regulations

Covers PPE, general regulations, and operator responsibility.

Specific Operational Safety

Covers enclosed spaces, flammable materials, unattended operation, and jet repulsion.

Proper Use

Application Examples & Agents

Lists application examples and suitable spraying agents.

Control Elements

Diagram and Descriptions

Lists and describes the various control parts of the jet pistol.

Safety Devices and Symbols

Operating Symbols

Explains symbols used in the manual for hazard warnings.

Operations

Jet Performance & Pressure

Details jet performance based on air quantity and operating pressure.

Setup and Operation

Covers attaching accessories, air/water connections, and operational steps.

Water Usage and Shutdown

Explains operation with water, rinsing, and shutdown procedures.

Care and Maintenance

Maintenance Schedule

Outlines daily, weekly, and monthly checks for wear and tear.

Component Replacement

Guides on replacing the mixing chamber and air nozzle.

Troubleshooting

Common Faults and Remedies

Lists common problems like no air, no spray medium, or water issues with solutions.

Specifications and Declarations

Technical Data

Provides detailed specifications for air supply, water connection, and performance.

EU Declaration of Conformity

Declaration of compliance with EU safety and health requirements.

Spare Parts and Warranty

Approved Spare Parts

Information on using only manufacturer-approved accessories and spare parts.

Warranty Terms

Details warranty conditions and how to make a claim.

Kärcher ST 120 Specifications

General

Brand	Kärcher
Model	ST 120
Category	Power Tool
Language	English

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Kärcher ST 120 - User Manual

Table of Contents

Questions and Answers

Summary

Safety Instructions

General Safety Precautions

Protective Equipment & Regulations

Specific Operational Safety

Proper Use

Application Examples & Agents

Control Elements

Diagram and Descriptions

Safety Devices and Symbols

Operating Symbols

Operations

Jet Performance & Pressure

Setup and Operation

Water Usage and Shutdown

Care and Maintenance

Maintenance Schedule

Component Replacement

Troubleshooting

Common Faults and Remedies

Specifications and Declarations

Technical Data

EU Declaration of Conformity

Spare Parts and Warranty

Approved Spare Parts

Warranty Terms

Summary

Safety Instructions

General Safety Precautions

Protective Equipment & Regulations

Specific Operational Safety

Proper Use

Application Examples & Agents

Control Elements

Diagram and Descriptions

Safety Devices and Symbols

Operating Symbols

Operations

Jet Performance & Pressure

Setup and Operation

Water Usage and Shutdown

Care and Maintenance

Maintenance Schedule

Component Replacement

Troubleshooting

Common Faults and Remedies

Specifications and Declarations

Technical Data

EU Declaration of Conformity

Spare Parts and Warranty

Approved Spare Parts

Warranty Terms

Kärcher ST 120 Specifications

Related product manuals