This involves turning the machine on with the spray gun unlocked and the unit submerged in a bucket of water, or using the thumb to block the water inlet until pressure builds. Troubleshooting the Unloader Valve The unloader valve is a critical safety and performance component that recirculates water back to the inlet when the trigger is released.
Preventing Pressure Washer Pump Overheating and Damage
When your pressure washer loses pressure or fails to deliver a consistent spray, the pump is almost always the primary suspect. Priming the Pump Correctly Priming is the process of removing air from the pump chamber to ensure a solid column of water is being moved.
Conversely, if it is stuck closed, the pump may overheat due to the immense pressure generated with nowhere for the water to go. Addressing Cavitation and Air Leaks Cavitation occurs when air bubbles form in the water stream and collapse violently inside the pump, causing a grinding noise and reducing efficiency.
Preventing Pressure Washer Pump Overheating and Damage
If the inlet or outlet valves are chipped, cracked, or stuck with debris, they will fail to create the necessary seal. Inspecting Valves and Seals To inspect the valves, you will need to remove the pump's valve plate.
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