Bleed Air From Fuel Filter

Fuel pump primer lever.

Bleed air from fuel filter.

A majority of diesel fuel injectors and filters have a screw specifically designed to bleed the fuel lines. When you change a diesel fuel filter run out of fuel or disturb the fuel system air is trapped. Whenever the fuel system has been opened up for service lines disconnected or filters removed it will be necessary to bleed air from the system. Clean outside of filter housing.

The filter can be found by tracing the fuel lines back to where they reach the engine filter. Step 1 twist the valve on the fuel petcock located at the bottom of the fuel tank in a clockwise direction to shut off the fuel supply to the engine. In cases where a fuel injection pump is involved follow the fuel lines until you arrive at the pump. Fuel filter bleed screw.

Once both of the fuel filters have been changed it is likely that air has entered the fuel system requiring the filters and the fuel system be bled before the engine will run properly. You should hear the escaping air as you operate the hand primer lever eventually each stroke of the lift pump primer lever should deliver a clean air free shot of fuel. Escaping fuel air mixture operate the hand primer lever until you have air free fuel coming from the bleed screw s then close the air vent fittings. Down on the farm mark shows you the fastest way he knows of to bleed a diesel fuel system after it has been run out of fuel no tools all you need is a.

Others have filters with replaceable cartridges. When you change the fuel filter or run out of fuel in a diesel vehicle you must bleed the air bubbles out of the fuel system and then prime it to get a new supply of fuel circulating. On dual fuel filter system bleed air only from final filter. Engines with mechanical and de10 fuel systems.

When you try to start the engine this air acts as a lock preventing the normal supply of fuel into the cylinder. Here are the steps to take in bleeding air from a diesel fuel system.