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Stihl RB 400 - User Manual

Stihl RB 400
60 pages
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STIHL RB 400
WARNING
Read Instruction Manual thoroughly
before use and follow all safety
precautions – improper use can
cause serious or fatal injury.
ADVERTENCIA
Antes de usar la máquina lea y siga
todas las precauciones de
seguridad dadas en el manual de
instrucciones – el uso incorrecto
puede causar lesiones graves o
mortales.
Instruction Manual
Manual de instrucciones

Questions and Answers

  • C
    Cody DavisAug 4, 2025
    What to do if my Stihl RB 400 is not dispensing detergent?
    • A
      Anna ThompsonAug 4, 2025
      If your Stihl Pressure Washer isn't dispensing detergent, consider the following: * The detergent tank may be empty. Fill the detergent tank. * The suction hose or suction intake filter may be clogged. Clear any blockages. * The injector could be dirty or clogged. Clean the injector. * The detergent nozzle or low-pressure nozzle might be missing or clogged. Insert or clean the nozzle.
  • E
    Eileen PachecoAug 9, 2025
    How to fix detergent not dispensing on Stihl RB 400 Pressure Washer?
    • M
      Mrs. Susan HollandAug 9, 2025
      If your Stihl Pressure Washer isn't dispensing detergent, consider these possible causes: * The detergent tank is empty: Fill the detergent tank. * The suction hose or suction intake filter is clogged: Eliminate the clog. * The injector is dirty or clogged: Clean the injector. * The detergent nozzle or low-pressure nozzle is not inserted or is clogged: Insert or clean the detergent nozzle or low-pressure nozzle.
  • W
    westalanAug 12, 2025
    Why is water leaking from the thermal relief valve on my Stihl Pressure Washer?
    • C
      Craig PatrickAug 13, 2025
      Water may come out of the thermal relief valve on your Stihl Pressure Washer if: the water temperature is too high. Avoid running the pressure washer for more than 2 minutes without actively spraying. Also, the thermal relief valve may be leaking and need to be repaired.
  • B
    Barbara GordonAug 17, 2025
    Why is oil leaking from the high-pressure pump of my Stihl RB 400 Pressure Washer?
    • K
      Kevin JonesAug 17, 2025
      If oil is leaking from the high-pressure pump of your Stihl Pressure Washer, it indicates that the high-pressure pump is leaking and needs to be repaired.
  • T
    Theresa SmithAug 21, 2025
    What to do if water comes out of the thermal relief valve on Stihl Pressure Washer?
    • C
      Cody JohnsonAug 21, 2025
      If water is coming out of the thermal relief valve of your Stihl Pressure Washer, it may be due to the water temperature being too high. To resolve this, avoid running the pressure washer for more than 2 minutes without actively spraying.
  • A
    Aaron SuttonOct 25, 2025
    Why is there no water coming from my Stihl RB 400 Pressure Washer nozzle?
    • J
      James JohnsonOct 26, 2025
      There could be several reasons why your Stihl Pressure Washer isn't spraying water or has low water pressure: * A kink in the water or high-pressure hose. Remove any kinks, or replace the high-pressure hose. * Insufficient water supply. Fully open the water tap and check the diameter and length of the intake hose. * Low engine speed. Run the engine at full throttle or have it repaired. * Clogged water intake screen. Clean the water intake screen. * Air in the system. Vent the system by briefly activating the spray gun several times. * Air being drawn into the high-pressure pump. Check and seal all connections in the water intake if necessary. * Clogged or worn high-pressure nozzle. Clean or replace the nozzle. * Worn valves or gaskets in the high-pressure pump. Have the p...
  • P
    Paul WilliamsOct 29, 2025
    Why is there no water coming out of my Stihl RB 400?
    • J
      Jason TaylorOct 29, 2025
      If little to no water is coming from the high-pressure nozzle of your Stihl Pressure Washer, several issues could be the cause. Check for the following: * A kinked water hose: Remove any kinks. * A kinked high-pressure hose: Replace the high-pressure hose. * Water shortage: Fully open the water tap and verify the intake hose's diameter and length. * Low engine speed: Run the engine at full throttle. * Clogged water intake screen: Clean the water intake screen. * Air in the system: Vent the system by repeatedly actuating the spray gun. * The high-pressure pump drawing air: Check and seal all connections in the water intake if necessary. * A clogged or worn high-pressure nozzle: Clean or replace the nozzle. * Frozen high-pressure pump: Thaw out the high-pressure pump. * ...

Summary

Guide to Using this Manual

Symbols in Text

Explains how symbols and text are used in the manual for instructions and illustrations.

Safety Precautions and Working Techniques

IMPORTANT SAFETY INSTRUCTIONS

Crucial safety warnings for operating the pressure washer to prevent injury or death.

The Operator

Details physical and mental requirements for the operator, including health and fatigue.

Proper Clothing

Specifies essential protective apparel, including eye and hearing protection, and footwear.

The Pressure Washer

The Use of the Pressure Washer

Outlines how to safely use the pressure washer, including transport and fueling.

Transporting the Pressure Washer

Instructions on how to safely move the pressure washer, including securing it.

Fueling Instructions

Guidelines for safe refueling, including ventilation, cooling, and spill prevention.

Connecting the Water Supply

Before Starting

Checks and preparations required before operating the pressure washer to ensure safety and proper function.

Starting the Engine

During Operation

Guidelines for operating the pressure washer, including handling the spray attachment and general safety.

Holding and Controlling the Spray Attachment

How to grip and control the spray gun and lance due to reactive forces.

Detergents

Working Conditions

Important considerations for the operating environment, including ventilation and hazardous fumes.

Operating Instructions

Emergency Procedures

Actions to take in case of imminent danger or emergency, including shutting down the unit.

Working Alone Policy

Emphasizes the importance of not working alone and keeping others within calling distance.

Maintenance and Repairs

Disposal

Instructions on how to properly dispose of the product and its components according to regulations.

Limited Warranty

Information on the product's warranty policy and where to find details.

Trademarks

STIHL Registered Trademarks

Lists the registered trademarks associated with STIHL products.

Stihl RB 400 Specifications

General IconGeneral
Hose Length25 ft
Weight29.5 lbs
Engine Type2-stroke
Power Output2.1 kW
Nozzles0°, 15°, 25°, 40°, Soap

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