Pressure washer pump oil: Cat pumps

RhettWS

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Dec 4, 2015
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Colleagues,

I managed to get my pressure washer fully operational after the flood which is a blessing. Lots of water in the engine and in the pressure washer pump. I needed to change the pump oil a couple of times to get all the water out and I have the following question.

Does anyone know exactly what is in the pressure washer pump oil? Specifically, what is the weight of the oil? I used the OEM Cat Pump oil, which I thankfully found. The bottle does not list what weight the oil is or at least I could not figure out the secret codes, if there was one. On their website, they refer to it as hydraulic oil or crankcase oil.

I will probably continue using the OEM product but I'd like to know what else I could use in a pinch.

Thanks
 
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