Cat D6c Low Fuel Pressure

Your best bet would be to apply air pressure to the fuel tank (the old inner tube with valve and band clamp trick, or modified fuel cap). Those priming pumps are great when the transfer pump is in good shape but when they wear the priming pump pressure bleeds back through due to the lack of a true shut off valve to direct the pressure to the injectors.

Thanks I'll give that a shot.

Are you bleeding with the throttle in the shut-off position? with the rack wide open, it is unlikely that you will get fuel past more than one injection pump.

Yes I had the throttle wide open. Are you saying that I should bleed it in the off position?
Thanks

Hi Beachyw, I had a D6C that I had run low on fuel (the dipstick still read 20%) and then had fuel supply problems. I loosened the main fuel line at the filter housing and discovered that fuel barely dribbled out even with the fuel line removed from the filter housing. I removed the fuel tank filler cap and applied air pressure to the fuel supply line to “back pressure” the fuel line towards the fuel tank until I heard bubbles flowing freely into the fuel tank. I connected the supply line and bled the injector lines and the tractor ran fine until I had time to properly clean the fuel tank. There are two valves on the bottom of the fuel tank one has the fuel supply line connected to it and the other valve is connected to a portion of the fuel tank that is lower than the position of the fuel supply valve. This is the fuel drain valve and it is recommended that this valve be cracked open monthly to allow water from condensation and other contamination to drain out so that it does not reach the level high enough to enter the fuel supply line.
Good Luck,
Craig