Kärcher K 3-78 Pressure Washer Manual

The Kärcher K 3-78 is a versatile pressure washer designed for light to medium cleaning tasks around the home. It features a powerful motor, adjustable pressure settings, and a variety of nozzles for different cleaning applications. Ideal for cleaning patios, garden furniture, bicycles, and vehicles, the K 3-78 is user-friendly and efficient. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Accessories 7. Operating the Pressure Washer 8. Maintenance and Care 9. Safety Information 10. Troubleshooting

Features at a Glance

Key components: High-pressure hose, adjustable spray lance, detergent tank, and integrated wheels for mobility.

Feature	Description
High-pressure hose	Durable hose for extended reach and flexibility
Adjustable spray lance	Allows for changing the spray pattern from a wide fan to a concentrated jet
Detergent tank	Built-in tank for easy application of cleaning detergents
Integrated wheels	For easy maneuverability
Powerful motor	Provides efficient cleaning performance
Safety lock	Prevents accidental activation of the trigger

Installation

Unpack the pressure washer and check for all components. Place on a stable surface.

Connect the high-pressure hose to the machine and the spray gun.
Attach the water supply hose to the inlet.
Ensure the detergent tank is filled if using detergent.
Plug into a power outlet.

WARNING! Ensure all connections are secure before use to avoid leaks.

First-Time Setup

Power on the pressure washer; follow the setup instructions.

Turn on the water supply and check for leaks.
Adjust the spray lance to the desired setting.
Test the pressure washer on a small area before full use.

CAUTION! Always wear protective gear while operating the pressure washer.

Specifications

Power: 1800 watts.
Pressure: Up to 2000 PSI.
Flow Rate: 1.3 GPM.
Weight: 20 lbs.
Dimensions: 12 x 12 x 30 inches.
Hose Length: 20 feet.
Detergent Tank Capacity: 0.5 gallons.

Controls and Settings

Access settings via the control panel. Features include power switch, pressure adjustment knob, and detergent control.

Safety Features: Trigger safety lock and thermal protection.

Connecting Accessories

Compatible with various Kärcher accessories for enhanced cleaning.

Turn off the pressure washer before connecting accessories.
Ensure the accessory is securely attached to the spray lance.
Select the appropriate nozzle for the task.

Tip: Refer to the accessory manual for specific connection instructions.

Operating the Pressure Washer

Follow these steps for effective operation:

Start the pressure washer by turning on the power switch.
Pull the trigger to begin cleaning; adjust pressure as needed.
After use, turn off the power and water supply.
Release pressure by pulling the trigger before disconnecting hoses.

WARNING! Do not point the spray gun at people or animals.

Maintenance and Care

Regular maintenance ensures optimal performance.

Check and clean the filter regularly.
Store in a dry place when not in use.
Inspect hoses for wear or damage.

CAUTION! Unplug and disconnect before performing maintenance.

Safety Information

Read all safety instructions before use. Keep children and pets away from the working area.

WARNING! High-pressure water can cause injury; always wear protective gear.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power cord not connected	Check power connection and outlet.
Low pressure	Clogged nozzle	Clean or replace the nozzle.
Water leaks	Loose connections	Tighten all connections.
Motor overheating	Continuous operation	Allow to cool down before restarting.

Service: For further assistance, contact Kärcher customer support.