During gerotor pump maintenance, some pumps flood while others do not. The pump uses a single oil supply gerotor to draw oil (vacuum) from a resevoir and to lube various areas while the pump uses multiple (about six) elements to scavenge the oil (vacuum) from these various areas and to return (pressure) to the reservoir.
Recently the pumps were upgraded by adding a thicker oil supply gerotor with greater displacement power. The required scavenge return pressure was also changed from 45 psig to 70 psig due to new design constraints. The flow to the six areas is controlled by different size orifices, so I personally don't believe the problem is on the supply side.
The question is what might be causing certain return system elements to fail to scavenge the oil causing some areas to flood with oil. Are the individual scavenging elements cavitating? What might cause this to happen? What do i want to inspect more carefully?
What Causes Gerotor Pump Flooding?
Re: What Causes Gerotor Pump Flooding?
