DIY Hyd Pump

[doodlebug]

Hi guy's, what if the pump could have more section's (stacked) added to it for larger scale, and keep most of the part's common? Would that help you Henry and keep the cost down? http://www.surpluscenter.com/item.as...name=hydraulic I use this picture for an example. The output's can be "tee'd" together.
I like the belt drive option, because the sprocket's could be changed for aplication to vary output, without expensive controller's?. Would this help with later in life leakage, for the motor's sake? Thank's for the link, Joe!
Some of the blackness in the hydraulic oil can be caused by heat!, But as fast as some of the pump's are turning? I wonder if they are cavitating? That could cause the funny wear pattern on the gear teeth.
Joe, I'm still trying to figure out an "unloader" to help with relief valve heat.
Still not finding what I want!
Well that's my long winded 2c worth!
Later, Neil#2 aka doodlebug.