![]() And if possible, it should be lower if you release the trigger. Like mentioned earlier, the spike should not exceed 10%. Try to find the setting where the pressure is at its highest and the spike as low as possible. If the nuts are too low, you can move them higher. Keep the machine running and continue adjusting the knob. Step 5: Adjust the knob until you find the spot where pressure is maximal and the spike is minimal.The pressure spike shouldn’t exceed 3240 PSI when you release the trigger. If it is higher, it can damage the pump over time.įor example, if you set the pressure to 3000 PSI. It would be best not to have more than a 10 % spike when you release the trigger. This is the spot where you need to stop adjusting the knob. The goal is to find the setting where the spike is somewhere between 5% to 10%. You will see that the pressure spikes up. Ensure that all the air from the pump is released and only water comes out of the nozzle. Try to spray at the same distance to the same spot to compare the different settings easier. If you do not have a pressure gauge, you have to do this by sight. You can use it to see the output pressure when you press the trigger. ![]() If you have a pressure gauge, attach it between the pump and pressure hose. Put the spring washer and black adjusting knob on. Lock the two nuts that you see on the rod together with a wrench.
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