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Karcher K 3.78 manual

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Table of contents for the manual

  • Page 1

    High Pressure W asher Operator Manual Overview .......................................... 2 Important Precautions ................ 3 - 4 Assembly Instructions ... .. ................ 4 Operating Instructions ..................... 5 GFCI Instructions ............................ 6 Using the Accessories .................... 6 Working with Detergents [...]

  • Page 2

    2 Never point nozzle at people or animals. Never drink alcohol or use drugs while operating this equipment. Never operate while standing in water. Never touch plug with wet hands. Never let electrical connections rest in water. Never operate pressure washer without the water turned on Never use hot water OVERVIEW NEVER ! Item Description Item Descr[...]

  • Page 3

    3 IMPORT ANT PRECAUTIONS – Read First! Safety W arnings When using this product, basic precautions should always be followed: • Read all the instructions before using the product. • High pressure jets can be dangerous if subject to misuse. The jet must not be directed at persons, animals, electrical devices, or the machine itself. • To redu[...]

  • Page 4

    4 ASSEMBL Y INSTRUCTIONS W ater Supply (Cold Water Only) • Water hose must be at least 3/4 inch in diameter. • Flow rate of water supply must not fall below 2.5 GPM (gallons per minute). • Flow rate can be determined by running the water for one minute into an empty“ 5-gallon container. • The water supply temperature must not exceed 104°[...]

  • Page 5

    5 OPERA TING INSTRUCTIONS Step 3 Connect the garden hose to the water inlet. Step 4 Connect garden hose to the cold water source and turn water on completely. Plug the power cord into the power outlet. Step 6 Turn on the pressure washer (I). The motor starts only if the trigger of the gun is pulled and shuts off when the trigger is released. Step 2[...]

  • Page 6

    6 GFCI INSTRUCTIONS USING THE ACCESSORIES The spray wand allows you to adjust the cleaning pressure. To clean at maximum pressure, the spray wand must be positioned to the high pressure setting (+). To apply detergent, the wand must be positioned to the low pressure setting (-). V ario power spray wand For higher pressure turn wand collar in the pl[...]

  • Page 7

    7 For best results see Cleaning Tips on pages 9 & 10 for specific information on how to clean different surfaces. Always Use Karcher Detergents for Best Results. Karcher biodegradable detergents are specially formulated to protect the environment and your pressure washer. Special formula won’t clog the suction tube filter and will protect the[...]

  • Page 8

    8 Step 6 Disconnect the high pressure hose from the high pressure outlet. Step 1 Release trigger (A) and engage gun safety lock (B). 1. Disconnect all water connections. 2. Turn on the machine for a few seconds , until the water which had remained in the pump exits. Turn of f immediately. 3. Do not allow high pressure hose to become kinked. SHUTTIN[...]

  • Page 9

    9 Deck Cleaning (with or without detergent) Pre-rinse deck and surrounding area with fresh water. If using Kärcher Deck and Patio Cleaner, place detergent suction tube directly into cleaning solution and apply to surface at low pressure. For best results, limit your work area to smaller sections of approxi- mately 25 square feet. Allow Kärcher De[...]

  • Page 10

    10 Barbecue Grills, Outdoor Power Equipment & Gardening T ools (with or without detergent) Pre-rinse cleaning surface with fresh water. If using Kärcher All Purpose Cleaner or Degreaser, place detergent suction tube directly into cleaning solution and apply detergent at low pressure. Allow Kärcher detergent to remain on surface 1-3 minutes. D[...]

  • Page 11

    11 TROUBLESHOOTING Disconnect the machine from the power source before making any repair. Symptom Motor will not start Unit does not reach high pressure. Output pressure varies high and low . Cause On/Off switch is in the “OFF” (O) position. Power cord is not plugged in. Extension cord is too long. Extension cord is not proper gauge. Extension [...]

  • Page 12

    12 TROUBLESHOOTING – continued If you encounter any additional difficulties not listed, please call our service center for help. Karcher Customer Support USA In USA Call: 1-800-537-4129 or visit our website: www .karcher -usa.com Solution Check connection. Dilute detergent, for best results use Kärcher detergent. Run warm water through filter to[...]