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I dunno. Rationalize it. HOT pump and HOT box mean that the fluid is HOT. That box certainly isn't turning enough to create friction in the fluid sufficient to heat the fluid. Ergo either the pump is creating the friction by either bad bearings due to a poor remanufacturing, or due to the pump generating pressure. Both of those scenarios don't make sense. The pump at idle, with the box under no load, should not create any pressure, ergo no heat. The pump being new, should not have bad bearings. So the only thing else I can think of is an obstruction in the flow, such as would be created by reversing the lines. Obstructions mean the pump will have to work REALLY hard to flow the fluid. Really hard work equals heat. Lots of it. But this is all hypothetical
I dunno.
Rationalize it. HOT pump and HOT box mean that the fluid is HOT. That box certainly isn't turning enough to create friction in the fluid sufficient to heat the fluid. Ergo either the pump is creating the friction by either bad bearings due to a poor remanufacturing, or due to the pump generating pressure. Both of those scenarios don't make sense. The pump at idle, with the box under no load, should not create any pressure, ergo no heat. The pump being new, should not have bad bearings.
So the only thing else I can think of is an obstruction in the flow, such as would be created by reversing the lines. Obstructions mean the pump will have to work REALLY hard to flow the fluid. Really hard work equals heat. Lots of it.
But this is all hypothetical
