Adjusting 3500 psi cat pump to 4000 psi? Possible?

Discussion in 'Power Washing' started by Dawson, May 24, 2018.

  1. Dawson

    Dawson LawnSite Bronze Member
    Messages: 1,376

    My pressure washer is a 3500psi 4gpm belt drive cat pump on a 13hp honda.
    I mainly do driveways and sidewalks using a 18 inch Surface cleaner on a 200 foot hose ( and I routinely need more than 150 feet out so shortening the hose is not an option) but I think I would be a little more efficient if the pump could put out 4000psi. That should keep me up around 3700 psi at the surface cleaner instead of 3200 psi like it is now.

    I don't have the model # of the pump handy but my question is can a 3500 psi cat pump be converted or adjusted to do 4000psi? Or will I just have to buy a new pump? It has a flow actuated unloader on it.

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