Karcher K 3.78 specifications Troubleshooting

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TROUBLESHOOTING – continued

Symptom

 

Cause

 

Solution

 

 

 

 

 

 

 

No detergent.

 

Detergent suction tube not properly

 

Check connection.

 

 

connected to the machine.

 

 

 

 

 

 

 

 

 

Detergent is too thick.

 

Dilute detergent, for best results

 

 

 

 

use Kärcher detergent.

 

 

 

 

 

 

 

Filter on detergent suction tube is

 

Run warm water through filter to

 

 

clogged.

 

remove debris.

 

 

 

 

 

 

 

Damaged or clogged detergent

 

Remove obstruction or replace

 

 

suction tube.

 

detergent suction tube.

 

 

 

 

 

 

 

Spray wand is in high pressure

 

Turn spray wand tip to low

 

 

position.

 

pressure position.

 

 

 

 

 

 

 

Discharge nozzle is obstructed.

 

Blow out or remove debris with

 

 

 

 

fine needle.

 

 

 

 

 

Garden hose

 

Loose fittings.

 

Tighten fittings.

connection leaks.

 

 

 

 

 

Missing/worn rubber washer.

 

Insert new washer.

 

 

 

 

 

 

 

 

Spray wand leaks.

 

Spray wand not properly attached.

 

Insert the spray wand into the trig-

 

 

 

 

ger gun. Carefully press in against

 

 

 

 

the spring tension and twist into

 

 

 

 

the locked position.

 

 

 

 

 

 

 

Broken o-ring or plastic insert.

 

Call Kärcher customer service

 

 

 

 

“hotline and order repair kit “(part

 

 

 

 

no. 2.883-111.0).

 

 

 

 

 

Pump is noisy.

 

Pump is sucking air.

 

Check that hoses and fittings are

 

 

 

 

air tight. Turn off machine and

 

 

 

 

purge pump by squeezing trigger

 

 

 

 

gun until “a steady flow of water

 

 

 

 

emerges through the nozzle.

 

 

 

 

 

Water leaks from pump (up

 

Loose fittings.

 

Check that all fittings are tight.

to 10 drops per minute is

 

 

 

 

 

Water seals are damaged or worn.

 

Call service center.

permissible).

 

 

 

 

 

 

 

Oil Drip.

 

Oil seals are damaged or worn.

 

Call service center.

 

 

 

 

 

In USA Call: 1-800-537-4129

or visit our website: www.karcher-usa.com

If you encounter any additional difficulties not listed, please call our service center for help.

Karcher Customer Support USA

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Contents 78 M Overview NeverImportant Precautions Read First Ground Fault Circuit Interrupter Gfci ProtectionExtension Cords Important Precautions Assembly InstructionsWater Supply Cold Water Only Operating Instructions Using the Accessories Gfci InstructionsWorking with Detergents Always Use Karcher Detergents for Best ResultsShutting Down & Cleanup Taking a BREAK... five minutes or moreWinterizing and LONG-TERM Storage Cleaning Tips Deck CleaningHouse Siding Cement Patios, Brick and StoneCleaning Tips Optional Cleaning AccessoriesBarbecue Grills, Outdoor Power Equipment & Gardening Tools Patio & Lawn FurnitureTroubleshooting Troubleshooting

K 3.78 specifications

The Kärcher K 3.78 is a versatile and powerful pressure washer designed for light to medium-duty outdoor cleaning tasks. Renowned for its combination of performance and user-friendliness, it has become a popular choice among homeowners looking to maintain the cleanliness of their vehicles, patios, driveways, and garden furniture.

At the heart of the K 3.78 is its robust motor, which delivers a maximum pressure of 1800 PSI, allowing users to efficiently tackle various grime and dirt challenges. The water flow rate of up to 1.6 GPM ensures that stubborn stains and dirt are effectively washed away, making it suitable for a wide range of applications.

One of the standout features of the K 3.78 is its innovative N-Cor pump, which is designed for durability and longevity. It is resistant to corrosion, ensuring that the pressure washer stands the test of time even with regular use. The K 3.78 also includes a detergent injection system, enabling users to apply cleaning solutions directly through the spray wand, enhancing cleaning efficiency for more challenging stains.

The pressure washer is equipped with a 20-foot high-pressure hose, giving users ample reach while staying mobile. The ergonomic handle and lightweight design further ensure comfort during use, reducing hand fatigue, especially during extended cleaning sessions. Additionally, the integrated on-board storage allows for convenient access and storage of accessories, including nozzles and the detergent bottle.

Speaking of nozzles, the K 3.78 features an adjustable spray wand with multiple settings. This versatility allows users to switch between high-pressure jets for tackling tough dirt and wider spray patterns for rinsing larger areas, all without the need to change out the nozzle.

When it comes to safety, the K 3.78 includes a safety lock mechanism on the trigger gun, preventing accidental activation. The robust construction of the unit ensures stability during operation, reducing the risk of tipping over.

In summary, the Kärcher K 3.78 is an excellent investment for those seeking a reliable pressure washer that balances power and convenience. With its durable construction, versatile cleaning capabilities, and user-friendly design, the K 3.78 makes outdoor cleaning tasks simpler and more efficient, keeping your spaces looking pristine all year round.