Devilbiss
Gas Pressure Washer

Model #1603WBF Devilbiss power washer

Here are the diagrams and repair parts for Devilbiss 1603WBF power washer, as well as links to manuals and error code tables, if available.


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Showing 10 of 39 parts

Seal Kit

#1

Pump Diagram

Seal kit

Part #V160

The manufacturer no longer makes this part, and there's no substitute part

Knob

#402

Pistons & valve seat Diagram

Knob

Part #P726

The manufacturer no longer makes this part, and there's no substitute part

Check Valve

#2

Pump Diagram

Check valve

Part #16795

The manufacturer no longer makes this part, and there's no substitute part

Injec.ball

#477

Pistons & valve seat Diagram

Injec.ball

Part #V152

The manufacturer no longer makes this part, and there's no substitute part

Filter

#21

Pump Diagram

Filter

Part #F187

The manufacturer no longer makes this part, and there's no substitute part

Piston Retainer

#411

Pistons & valve seat Diagram

Piston retainer

Part #15484

The manufacturer no longer makes this part, and there's no substitute part

Valve

#425

Pistons & valve seat Diagram

Valve

Part #15485

The manufacturer no longer makes this part, and there's no substitute part

Bearing Case

#4

Pump Diagram

Bearing case

Part #15904

The manufacturer no longer makes this part, and there's no substitute part

Hex Head Screw

#3

Pump Diagram

Hex head screw

Part #15905

The manufacturer no longer makes this part, and there's no substitute part

Seal Case

#17

Pump Diagram

Seal case

Part #V158

The manufacturer no longer makes this part, and there's no substitute part

Symptoms for gas pressure washers

Choose a symptom to see related pressure washer repairs.

Main causes: pump running for more than 5 minutes when the spray wand isn't being used, faulty pressure relief valve, bad unloader valve
Main causes: using a high-pressure spray tip when applying detergent, clogged siphon tube, chemical injection system failure
Main causes: damaged recoil starter, oil inside cylinder, locked up engine piston
Main causes: overfilling engine with oil, improper fuel/air mixture, choke system problems, dirty carburetor, engine needs tune up
Main causes: stale fuel, gummed up carburetor, engine needs tune up, throttle and choke controls need adjustment, bad recoil starter
Main causes: faulty unloader valve, bad pressure regulator
Main causes: broken recoil spring, damaged recoil starter
Things to do: tune up the engine, inject pump saver into the water pump when storing the pressure washer for the winter
Main causes: insufficient water supply, clogged water inlet screen, clogged pressure hose, faulty pump check valves, stuck unloader valve

Repair guides for gas pressure washers

These step-by-step repair guides will help you safely fix what’s broken on your pressure washer.

How to install a pressure washer check valve kit

Air in the inlet water supply can damage the check valves. If the pump won’t build up pressure due to damaged check valves, follow these steps to replace the check valves.

Repair difficulty
Time required
 120 minutes or less
How to replace a pressure washer unloader valve

The unloader valve recirculates water to protect the pump from damage. If the unloader valve is defective, replace it using the steps in this repair guide.

Repair difficulty
Time required
 15 minutes or less
April 1, 2013
By Lyle Weischwill
How to replace a pressure washer pump

The pump can be damaged by air in the inlet water supply or by chemicals that remain in the pump body after using the chemical injection system. Follow these steps to replace a damaged pump.

Repair difficulty
Time required
 15 minutes or less

Articles and videos for gas pressure washers

Use the advice and tips in these articles and videos to get the most out of your pressure washer.

March 1, 2016

Getting the most from a pressure washer

By Sears PartsDirect staff

Learn how to get the best results when using a pressure washer.

January 1, 2016

Choosing the correct spray tip for a pressure washer

By Sears PartsDirect staff

Spray tips vary in pressure and angle of spray. This guide matches the spray tip to the cleaning job.

November 1, 2015

7 steps for winterizing and storing a pressure washer

By Sears PartsDirect staff

Follow this advice to winterize your pressure washer.