Having problems with your General Pressure Washers ?

My Bosch pressure washer has power and the water is flowing through the machine, but no high pressure?


Answers :

It would take a small book to explain how those things work but I'll try to cut it down some. Most have three pistons in the bottom of the pump that are operated by a cam that looks like a wavy pancake. As the waves pass over the spring loaded pumps, which is actually a plunger, it presses it down and pumps. Usually each pump has three plungers. If you tackel it yourself be careful when you disamble it and remember how it came apart, especially the "O" rings. That is more than likely where you're loosing pressure, its by - passing your plungers. Replace the "O" rings and fabric washers if it has any and make sure the cam is not worn or warped. There's one other thing that keeps the pump from working and I hope this is whats wrong with yours. The cam I spoke of is attached to the crankshaft with a little pin like the fly wheel on a push mower. If that has shered off you can just replace it and go on. It a pretty good job and I can't say enough about how important it is to watch where things are as you disamble it. also look fragments of "O" rings in the bottom of the plunger assembly. Go onto the internet and see if you can find a rebuild kit for it. I've never looked for one but there is probably somebody out there that makes rebuild kits for those rigs.\012Hope this helps, this is from my own experience with about a dozen of them, all worked but one and we couldn't get the motor started on it.\012dhgill1949
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My Bosch pressure washer has power and the water is flowing through the machine, but no high pressure?


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