I have noticed that some builders are using an hydraulic pump as an oil pump for their turbo. Since an hydraulic pump is designed to work with hydraulic fluid, aren't they prone to seals failure when used with mineral or synthetic motor oil. Would such a pump work fine with real turbine/ jet engine oil? But then would the turbo be fine with such oil ?
I've used a hydraulic pumps for a fuel pump without problems , it'll depend on seal material , turbine oil is best not used for anything but a turbine engine that requires it , there are much safer oils to use
You shouldn’t see any issues using a hydraulic oil pump to pump engine oil. Oil is oil. Excessive temperature, cavitation, contaminates, running dry and drastically reduced viscosity is what’s going to damage a pump/seals in our application. I also use a hydraulic oil pump as a fuel pump to pump kero. If your going to see dramas, it’s when doing this. Kero is much thinner than oil but it does still have some lubricating properties quite like diesel. For this reason I don’t expect my pump to last forever