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  1. 8

    Pressure washer maximum PSI?

    Had another thread about unloader valve issues, got that sorted out. Now I'm wondering if anyone had an idea what the maximum PSI is on this old pump. It's stamped 1978, on an old Simpson pressure washer. I can't find any information, only info I have is "T80/5" stamped in the head. I was...
  2. 8

    Old Simpson unloader valve issues

    I acquired an old 1978 simpson pressure washer. Belt driven unit with a HF 6.5hp engine on it. Issue i am having is with the unloader. I took it apart, inspected everything, replaced a couple seals and put it back together. it no longer blows water everywhere, but it gets "stuck" in the unloaded...
  3. 8

    How to diagnose condition of vintage compressor

    Just wondering other then tear down what steps should be taken to figure out the condition of an old 2 stage pump. As of now it still compresses air Interstage pressure is a little high What else?
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