What happens when the return line of a pump is above the liquid level?
This will create an effect similar to cavitation and with the same results. Another source of air in the suction line is the return line in the tank if the pump is re-circulating the fluid through a system. If the return line or supply line is above the tank liquid level, the liquid will become very become aerated.
What to do if your power steering pump is leaking?
Check also for a defective or cracked cap of course. Once you are sure all air has been expelled from the system, if the problem recurs there could be a restriction in the return line to the pump or a leak that admits air.
What should I do if my fuel return hose is not working?
If you suspect that your fuel return hose, or perhaps another fuel hose, may be having an issue have the vehicle inspected by a professional technician, such as one form YourMechanic, to determine if the hose should be replaced. The most popular service booked by readers of this article is Fuel System Inspection.
What causes the suction line on a pump to become aerated?
Another source of air in the suction line is the return line in the tank if the pump is re-circulating the fluid through a system. If the return line or supply line is above the tank liquid level, the liquid will become very become aerated. This is a huge issue. Aerated tanks damage the pump just by creating cavitation like conditions for the pump.
Where is the return line on a fuel pump?
That’s why the fuel filter in these setups is typically installed clocked with the secondary outlet (return line) above the main outlet to the carb. The pump constantly sends fuel to the filter. When there’s excess fuel, it fills up the filter until the fuel level inside reaches the return port.
What should the return line of a hydraulic pump be?
Be sure the main tank return line discharges well below the minimum oil level and not on top of the oil. On new designs it is helpful to increase the diameter of the tank return line for a few feet before it discharges. This causes oil velocity to decrease, reducing turbulence inside the reservoir.
What happens to the water when the return pump stops?
When the return pump stops, the filled-with-water return line will immediately reverse the direction of it’s flow via siphon action and start sucking in water from the main display. This is usually referred to as “Back Siphoning” because it is unintended. The amount of water that drains during these few seconds can be minimized but not eliminated.
Do you need to retrofit a fuel return line?
It’s an easy question to answer on vehicles that already have a fuel return line…or at least the routing room for one. Retrofitting a returnless system can get expensive, requiring a new pump, regulator, and plumbing. But that’s not to say your vehicle’s returnless system isn’t pretty darn good.