D7 3T fuel problems

I would start by checking for good flow by gravity only to the inlet of the fuel pump. Usually the easiest way to check that is to drop the inlet block off just unbolt it and crack the gasket loose so it can drop down. Might need to unbolt the fuel line supports back a ways. With that down catch the spring and fuel pressure bypass valve poppet that may fall out into the belly pan.

I am betting a clogged tank valve etc. Of course your gear pump could be shot, running it low may have sloshed fuel around and stirred up enough rust and debris to damage pump. Several folks have posted pictures of a filter installed in the line ahead of the pump to prevent that.

Did you open the lower bleed screw first? allot of guys think just open the top one and good to go, wrong! the lower one gets the air out of the filter housing area first and faster, once thats bled open the top one and get the remaining air out above the the filter plate, then fuel will be up to the port that goes to the injection pump, then open the bleeders at the pumps till all air is out and the engine will fire right up. no need for all this pressurising the tank bs and whatever else.Done it this way and never had problems. With the tank low you might have a blocked shut off valve or fuel line. To check take the line off at the transfer pump and blow it out from the tank or either end.

Thanks for suggestions every one. Will try them tomorrow and she if it starts.

"no need for all this pressurising the tank bs and whatever else"

I am surprised that you find this method of bleeding a fuel system bs, I use it quite often and I believe many other guys do too.

Well I guess whatever works for you then.

"no need for all this pressurising the tank bs and whatever else"

I am surprised that you find this method of bleeding a fuel system bs, I use it quite often and I believe many other guys do too.

[quote="dpendzic"]"no need for all this pressurising the tank bs and whatever else"

I am surprised that you find this method of bleeding a fuel system bs, I use it quite often and I believe many other guys do too.[/quote]

I have found both methods work fine.

For the gravity flow method the tank needs to be full or have a high enough fuel level to provide sufficient head pressure to flow the fuel depending on how the machine is sitting relative to level ground.

Pressure method is faster as long as you don't over pressurize the tank in the process. The pressure method can disquise flow problems so that can have you chasing your own tail.

I usually use the gravity feed method because it is the easiest.

Hey Team,

This is what I’ve found to be very very helpful with Cats... Put fuel in them so they don’t run out...:caked:
For those that run tractors with just the last 1/4 tank or less, you’ll find that increased fuel problems occur. Plugged filters, clogged lines, blockages in relief valve, and so on... It’s much easier when the Cat gets to a 1/4 tank to add fuel... less expense and problems.