Where is the unloader valve on a Karcher pressure washer?

The location of the unloader valve varies on our pumps, but it is always located on the brass pump head. Be sure not to remove the bolts that connect the head of the pump to the transmission housing. Usually the unloader valve can be found under the black plastic cap.

How do you know if the unloader valve is bad?

Water leaks and inconsistent behavior are also signs of a potential failure in the near future. González: The typical signal when there is an unloader malfunction is a reduction of flow through the nozzle, which results in pressure loss. Dean: Typical symptom of an unloader failure is a sudden smooth pressure loss.

What does unloader valve do?

A compressor unloader valve is a small part, typically measuring approximately 4-5 inches in length and width. It performs the critical function of releasing trapped air inside the tank, enabling the motor to restart. An unloader valve malfunction is one of the more common air compressor issues.

What are the symptoms of a bad unloader valve on pressure washer?

When the unloader valve of the pressure washer fails, certain signs can be seen. One of the most apparent problems with the unloader valve is less output pressure and a lower water flow. If the valve does not work correctly, the pressure washer pump will get hot, and more power is asked from the engine.

What happens if unloader valve is bad?

A failed unloader valve can cause high pressure at the nozzle. The unloader valve recirculates water to the pump inlet when the pump is running but the spray wand isn’t in use.

Can you run pressure washer without unloader valve?

In a pressure washer, water is pumped in faster than it’s let out. This creates the high-pressure water we use to blast surfaces clean. However, if the pressure washer gun is disengaged, and there is no unloader valve to redirect the pressurized water, the pressure would continue to build.

Why does my pressure washer shut off when I pull the trigger?

Why Does My Pressure Washer Die When I Pull the Trigger? A pressure washer stalling when the trigger is pulled is mostly due to a faulty unloader valve, O-rings, pressure washer trigger, or a too-high setting of the unloader valve.

How do I remove an unloader valve?

How to Remove the Pressure Washer Unloader Valve

1. Install a high-pressure tip on the pressure washer.
2. Locate the nut located on the top of the unloader valve.
3. Turn the pressure adjusting knob in a counterclockwise direction until it is completely removed.