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Obviously the spring was of a too low quality. The smaller inner spring is completely rusted away so the switch no longer operates correctly. A plastic pin has an inner and an outer spring on it (two consentric springs). Opened it and the pressure switch is the crook. Have the same p-washer (5-6 years old) and the same problem. There is no real danger of the valve parts getting seriously airborn since the actual pump output volume is very low (2.5 Gal/min). I have performed this procedure a number of times and the valve insert always pops out. If it doesn't come out after two or three pulls, set the throttle to low and start the engine. With the engine throttle closed, pull the starter cord several times to see it the valve insert will pop out. Wad up a small towel and place it over the bypass valve opening to catch the valve insert when it pops out.
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3 Answers SOURCE: Hello cikanek: Try this: From your posting, I assume you have removed the splash cap and the nylon bypass valve cover.Ĭonnect the water supply to the pump and connect the high pressure hose and wand to the pump outlet.A worn out nozzel, will result in low prssure too. I wish to add that I assume that you have the correct lance and correct nozzel size. If with a new spill valve, there is still no pressure.then you must tackle the sucktion and then the delivery valves. I mentioned many causes, but usualy it is the spill valve. The electric motor will be turning, but the pistons stay in the same position.
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Another cause but very rare, is that the swash plate that is pushing the pistons got loose. If these are not closing, then water is being sucked while delivering. One also can examine the delivery valves. If the sucktion vaves do not close, also water keeps on circulating. Also there could be a fault in the sucktion valves. In this case change the spill valve with a new one. If when the trigger is pulled and the bottom part of the spill valve does not close, then water keeps on circulating and hence no pressure. When the trigger is released, the spill valve compresses to let water circulate from its bottom part. When the trigger is pulled, the spill valve is in normal position. This is sometimes refered to as the Spill Valve.
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