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Step by step guide

Master: Replace capacitor

Servicing our pressure washers are quite straight forward and could be done by most people by following the step-by-step instructions in this manual. Please go trough the whole manual before starting work on your pressure washer to make sure you understand the procedure and that you have the necessary tools to complete the task.

Always unplug the pressure washer from both the mains power and the water outlet before starting the service. Even though power and water is disconnected there may be pressurized water in the hose. Discharge this pressure by pulling the trigger on the gun. Make sure your work area is clean and appropriate for the work you are about to do. There will usually be a small amount of water inside the pump and hose.

00. Parts and tools

An overview of what is needed to do this service.

01. Remove water filter

Remove water filter by unscrewing it counterclockwise.

02. Remove screws from the back cabinet

Unscrew the six T25 screws from the back cabinet.

03. Remove the front cover

Push the front brace release button and pull the front cover off.

04. Remove screws from the motor/pump

Unscrew the four T25 screws securing the motor/pump.

05. Release cable strain relief

Release the Cable strain release form the back cabinet.

06. Lift the motor/pump unit

Carefully lift the motor/pump so that it is on an angle.

07. Remove the old capacitor

Bend the locking tab outwards and pull out the capacitor out from the motor cowling.

08. Remove the power cord from the capacitor

Release both spade connectors by pressing the locking tabs and gently pulling the cable from the capacitor.

09. Attach the new capacitor

Get the new capacitor and fasten the two spade connectors.

The capacitor is bipolar, so it does not matter where the black and white cables go.

Give the cables a light tug to check that they are properly seated.

10. Put the capacitor back into the motor cowling

Put the capacitor back into the motor cowling, cables first.

Make sure that the hook on the motor cowling keeps the capacitor in place and that the cabling between the capacitor and motor is neatly tucked away.

11. Align the internal pressure hose

Make sure that the internal high-pressure hose runs trough these two depressions in the back cabinet (red arrows). If you are unable to fit the motor/pump properly then lift it up and check that the internal hose runs as indicated in this picture.

12. Align the motor/pump

If the previous step was successful the motor/pump unit should now fit correctly in the back cabinet.

13. Fix the cable strain relief

Reattach the cable strain relief into the slot in back cabinet.

14. Secure the motor/pump

Secure the motor/pump unit using 4 T25 screws. Two screws on top of the motor cowling and two screws on the pump head cover.

15. Attach the front cover

Put the front cover back onto the pressure washer. This is easiest with the pressure washer lying flat. A bit of work may be needed to get it to align perfectly with the back cabinet, take your time. Push the front brace release button to allow for a correct alignment of the brace. When you are happy with your alignment, raise the pressure washer to the upright position.

16. Fasten the front cover

Secure the front cover with 6 T25 screws from the backside of the pressure washer.

17. Reattach the water filter

Check that the filter cassette is clean and without damage.

Reattach the water filter to the water inlet.

18. First start after service

Congratulations with finishing the service of your AVA product.

It is now time to do the first start after service.

  1. Start by connecting the pressure gun to the hose.
  2. Connect water.Make sure no water is leaking from the inside or anywhere else on the pressure washer.
  3. Pull the trigger and let the water flow until there is no more air coming out.
  4. Connect the power cord.
  5. Turn on the pressure washer.
  6. Pull the trigger and let water run for a minute before connecting a nozzle.
  7. Connect the nozzle.
  8. Use the pressure washer and make sure it is operating as normal.

19. Troubleshooting

Water is leaking from the inside

  • Disconnect the power and open the pressure washer to locate the leak.
  • Take necessary action to remedy any leaks.

Motor runs and won't stop when you release the trigger

  • This is most likely due to an improper seating of the switch box on the start/stop valve.
  • Open the machine and check that the switch box is correctly seated.

The pressure washer won't turn on

  • Check that the power cable is connected.•Check that the circuit breaker has not been tripped.
  • Check that the fuse in the power plug is intact (UK models only).
  • Open the machine and check that all the internal cabling is connected.

Poor performance/pressure

  • Improper assembly or dirt/debris in the pump.
  • Check that the pump and especially the main valve for foreign objects/debris.
  • Make sure that the spring in the main valve is correctly seated and working as intended.

Motor is making a humming noise and is not able to start

  • Check that the capacitor is connected to the motor.
  • It should be connected with one white and one black cable.