DeVilbiss Air Power Company 3540CWHP User Manual

DeVilbiss Air Power Company 3540CWHP

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D20249 Rev 2 9/8/00

PRESSURE WASHER

OWNERS MANUAL

for

Model 3540CWHP

This product is not equipped with a spark arresting muffler. If the product will be used around

flammable materials, or on land covered with materials such as agricultural crops, forest, brush, grass, or

other similar items, then an approved spark arrester must be installed and is legally required in the state of

California. It is a violation of California statutes section 130050 and/or sections 4442 and 4443 of the Califor-

nia Public Resources Code, unless the engine is equipped with a spark arrestor, as defined in section 4442,

and maintained in effective working order. Spark arresters are also required on some U. S. Forest service

land and may also be legally required under other statutes and ordinances.

This product may contain chemicals known to the state of California to cause cancer, birth defects, or other

reproductive harm. This warning is given in compliance with California Proposition 65, as detectable amounts

of chemicals subject to proposition 65 may be contained in this product.

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Read Owner's Manual. Do not operate equipment until you

have read Owners Manual for Safety, Assembly, Operation,

Maintenance and Storage Instructions.

ENGINE OIL MUST BE ADDED TO THE ENGINE BEFORE USE.

CAUTION

Table of Contents

Questions and Answers:

A
ashleyjohnsonJul 29, 2025
Why is my DeVilbiss Air Power Company 3540CWHP Pressure Washer leaking oil at the pump?
- J
  Julie RamirezJul 29, 2025
  If your DeVilbiss Air Power Company Pressure Washer is leaking oil at the pump, there are several potential causes. The oil seals might be worn, the drain plug could be loose, or the fill plug o-ring might be worn. It's also possible that the pump is overfilled or the incorrect type of oil was used. In the case of worn oil seals, it is recommended to have them replaced by an Authorized Warranty Service Center (AWSC). For a loose drain plug, simply tighten it. If the fill plug o-ring is worn, check and replace it. If the pump is overfilled, check for the correct amount of oil. Finally, if the incorrect oil was used, drain the pump and fill it with the correct amount and type of oil.
C
claytonmelanieAug 3, 2025
What causes water leaking at the pump of my DeVilbiss Air Power Company 3540CWHP Pressure Washer?
- D
  Diane LynchAug 3, 2025
  If water is leaking at the pump of your DeVilbiss Air Power Company Pressure Washer, first check for loose connections and tighten them. If the piston packings are worn, it is recommended to have them replaced by an Authorized Warranty Service Center (AWSC).
E
Emily RoseAug 13, 2025
What to do if my DeVilbiss Air Power Company 3540CWHP Pressure Washer will not draw chemicals?
- A
  Andrew JonesAug 13, 2025
  If your DeVilbiss Air Power Company Pressure Washer is not drawing chemicals, make sure the low-pressure nozzle is properly installed in the wand. Check the chemical filter for clogs and clean it if necessary. Also, ensure the chemical hose is fully submerged in the chemical solution.
J
justinphamAug 18, 2025
How to fix water leaking at gun to wand connection on DeVilbiss Air Power Company 3540CWHP?
- J
  jreyesAug 18, 2025
  If the DeVilbiss Air Power Company Pressure Washer is leaking water at the gun to wand connection, it might be due to a worn o-ring. Check and replace the o-ring if necessary. It could also be due to a loose hose connection. Try tightening the connection. If the leak persists, disassemble the connection, apply thread sealing tape to the threads, and reassemble.

DeVilbiss Air Power Company 3540CWHP Specifications

General

Brand	DeVilbiss Air Power Company
Model	3540CWHP
Category	Pressure Washer
Language	English

Summary

Owner's Responsibilities

Pressure Washer Return Policy

Details the policy for returning the pressure washer for exchange or refund.

Safety Guidelines - Definitions

Explains safety symbols and definitions used throughout the manual.

Warranty Information

Responsibility of Original Purchaser

Outlines the user's duties for warranty claims and product use.

Warranty Coverage Limitations

Lists items and conditions not covered by the manufacturer's warranty.

Important Safety Instructions

Risk of Explosion or Fire

Identifies fire and explosion hazards and prevention methods.

Risk to Breathing

Covers hazards related to inhaling fumes and necessary precautions.

Risk of Unsafe Operation

Details risks from improper operation and safety measures.

Risk of Electrical Shock

Warns about electrical hazards and how to avoid them.

Risk to Fluid Injection

Explains dangers of high-pressure fluid injection and necessary actions.

Risk of Chemical Burn

Covers hazards from chemicals and protective measures.

Risk of Hot Surfaces

Identifies burn risks from hot components and safety advice.

Risk of Injury and Property Damage When Transporting or Storing

Provides safety guidance for moving and storing the unit.

Unpacking

Assembly

Operation

Basic Elements of a Pressure Washer

Describes the main components and functions of the pressure washer.

Basic Elements of Engine

Explains the fundamental controls and parts of the engine.

Pressure Washer Terminology

Defines key terms and units used for pressure washers.

Operating Features

Details specific operational aspects and features of the washer.

Pressure Adjustment

Guides on how to adjust pressure and warnings about exceeding limits.

Spray Nozzles

Describes the different spray nozzles and their applications.

How to Siphon Chemicals/Cleaning Solvents

Procedure for using the chemical siphon with low pressure.

Before Starting

Essential checks and preparations before starting the pressure washer.

Pre-Start Checklist

A final checklist to ensure all steps are completed before starting.

Starting Your Pressure Washer

Step-by-step instructions for starting the pressure washer.

Shutting Down Your Pressure Washer

Maintenance

Engine Maintenance

Recommendations for engine upkeep and consulting the owner's manual.

Pump Maintenance

Instructions for checking and changing the pump oil.

How to Clean the Nozzles

Procedure for cleaning clogged spray nozzles.

How to Clean the Water Inlet Filter

Guidance on cleaning the screen filter in the water inlet.

Storage

Preparation for Storage

Steps to protect the unit during extended storage or freezing temperatures.

Engine Preparation for Storage

Procedures for preparing the engine for storage.

Pump Preparation for Storage

Procedures for preparing the pump for storage.

Troubleshooting

Repair Parts

Quick Facts

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