Go BottomNew Holland 2120 air removal in diesel line
 | murray13
Join Date: Jan 2008 Posts: 3 Jackson, TN 
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2008-01-13 150195
I have a 2120 New Holland and allowed air to get in the fuel system when I cleaned the settling bowl. What are the steps to purge the system. Is there a mechanical pump to use or do you just have to run the starter?
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 | greg_g
Join Date: Jan 2004 Posts: 1816 Western Kentucky 
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2008-01-13 150197
I don't know the 2120 specifically, but it's been the same on every diesel tractor I've owned. There should be a little hand primer on the fuel pump and a pressure relief port of some type on the injection pump.
Open the pressure relief and prime with the hand pump until fuel comes out. Close the pressure relief. If you can't find the port, loosen the flexible fuel line where it enters the injection pump - prime - close. If you can't do that, loosen the fuel filter - prime - tighten.
Then loosen the fuel lines at the #1 injector. Put the tractor in neutral and advance the throttle about half way. Crank the starter until you see fuel coming out, tighten the fuel line. Repeat this process on the other injector lines, one at a time. The engine may start before you finish. It will run rough for a short time, then smooth out.
Check behind yourself to make sure all fittings are properly tightened.
//greg// ....
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Add PhotoNew Holland 2120 air removal in diesel line
 | auerbach
Join Date: Sep 2007 Posts: 2168 West of Toronto 
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2008-01-14 150200
You really should buy a manual for it.
Meanwhile, generally, if no hand pump, fill the fuel tank to maximise the pressure. If it won't start after bleeding at the bowl, there are likely one or two further bleed points toward the engine that may require a bit more work. ....
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Add PhotoNew Holland 2120 air removal in diesel line
 | kthompson
Join Date: Oct 2005 Posts: 5275 South Carolina
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2008-01-14 150206
For the most part, most times if I fill my fuel bowls when cleaning or changing them I do not have to bleed the system. I do try to run the engine a little first so it is not cranking cold but very seldom has this not worked fine for me. kt ....
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Add PhotoNew Holland 2120 air removal in diesel line
| murray13
Join Date: Jan 2008 Posts: 3 Jackson, TN
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2008-01-14 150207
Thanks to all. I couldn't find a mechanical pump or bleed screws, but loosing the fuel line at the pump and more than I would think running to get the air out, then the lines at the injectors to get fuel worked.
Thanks again,
Truman ....
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