Do you have to bleed john deere 3720 fuel lines?

Yes, bleeding the fuel lines on a JOHN DEERe 3720 may be necessary after servicing the fuel system, such as replacing the fuel filter or running out of fuel. This process ensures that air is removed from the lines, allowing the engine to receive a proper fuel supply. Typically, you can bleed the lines by using the manual fuel pump or by loosening the fuel line fittings at the injectors until fuel flows without air bubbles. Always refer to the operator's manual for specific instructions related to your model.