Fuel Issue

[ctjstr]

I've got a perplexing problem I thought I'd run by the group.

Changed the fuel filter on my New Holland TC 35D. Now it won't start. I'm 90% positive its air in the system, but for some reason I can bleed it out. Replaced the filter and both O rings. Turned fuel on to make sure it filled filter bowl. Tightened bowl. Then went to the bleed screw above the pump and bled that out. All fuel, no air. Now I've opened the lower injector lines. Spin the engine and no fuel coming out of the line. So, I'm perplexed. Any thoughts?

thanks

toni

 

[Jerry/MT]

Did you bleed the filter?

Here's some general instructions on how to bleed a diesel fuel system:

Bleeding a Diesel Fuel System
Start at the fuel outlet of the tank (inlet to the filter). Shut the tank valve, remove the line at the filter inlet and holding a suitable container to catch the diesel fuel, open the valve. You should have a CONTINUOUS rush/flow of fuel out of the line. If it dribbles or is intermittent, check the fuel cap for a blockage of the fuel vent or the strainer upstream of the valve for clogging. The strainer/screen is attached to the shut-off valve, and is positioned up inside the tank. You will have to drain the tank and pull the valve to clean the screen.
If you have good fuel flow at that point, reconnect the line and open the bleeder screw at the top of the filter. Turn on the tank valve and wait till you have a steady flow of fuel with no bubbles at the top of the filter, then close the bleeder screw.
Your pump may have a bleeder screw. If so, open that until fuel streams out with no bubbles, then close it. If you cannot identify the bleeder screw, loosen the inlet connection at the pump and purge air at that point.
Go back and make sure ALL the fittings in the fuel delivery system are tight so they cannot suck air.
Make sure the battery is fully charged. Loosen the fuel fittings at the injectors, either one at a time or all at once. Crank the engine till you see all fuel at the injector fittings and then tighten the fittings. If you do indvidual fittings, the engine will usually start before you get to the last fitting.
Alternatively, you can "tow-start" it to save wear and tear on your starter. Leave the injector lines cracked open at the injectors at first to purge the lines. Then tighten them up and she should start.
Your injection pump puts out a very small amount of fuel (high pressure/low volume). BE PATIENT. If the lines are totally empty, it takes a lot of cranking to fill them up.
sixbales & Jerry/MT

PS.I used to live up the hill from you in Graham!