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JD 6400 tractor - trouble bleeding fuel system
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Jim in Sask
Posted 8/2/2014 18:23 (#3998490)
Subject: JD 6400 tractor - trouble bleeding fuel system


I changed the fuel filter on my 6400 for the first time since I bought it, and I'm having trouble bleeding the fuel system. All the owner's manual says is to turn the key to "On" and let the electric pump run for 20 seconds, then it'll start. Good plan if it worked. Any suggestions? This is the first green tractor around here for a couple generations so I'm still learning the ropes.
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School Of Hard Knock
Posted 8/2/2014 18:27 (#3998494 - in reply to #3998490)
Subject: RE: JD 6400 tractor - trouble bleeding fuel system


just a tish NE of central ND
Leave the key on and bleed it again maybe do it for a minute. It has a electric pump in the tank. Get the air out.
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Plierswearer
Posted 8/2/2014 18:28 (#3998499 - in reply to #3998490)
Subject: RE: JD 6400 tractor - trouble bleeding fuel system


Midwest
Is there a air bleeder on the filter housing that you can open some when you turn the key on? A little ether helps also.
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Dan WI
Posted 8/2/2014 18:31 (#3998505 - in reply to #3998490)
Subject: RE: JD 6400 tractor - trouble bleeding fuel system



Dodge County WI
Open the bleed screw above the filter and turn key on. electric pump in tank will fill it quickly. I've replaced the pump twice in mine.
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Galaxie64
Posted 8/2/2014 19:32 (#3998586 - in reply to #3998490)
Subject: RE: JD 6400 tractor - trouble bleeding fuel system


WY, OK

Yeah you have to have the bleed screw open or it won't work.  If you didn't and now have pumped air into the pump you will need to crack the bleed screw on the filter, turn key on to get that air out then start cracking injectors and bleed clear through.

If it is like our 7200 the bleed screw is a plastic knurled screw that is hand tight at the top of the housing, about half a turn is all it takes.

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Jim in Sask
Posted 8/2/2014 20:49 (#3998685 - in reply to #3998490)
Subject: RE: JD 6400 tractor - trouble bleeding fuel system


I messed around with it a bit more and got her going. I appreciate the advice on the lift pump - this tractor has a lot of hours on it and I'm not sure how much tlc it's had. Thanks again.
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DaleK
Posted 8/2/2014 20:54 (#3998692 - in reply to #3998685)
Subject: RE: JD 6400 tractor - trouble bleeding fuel system


East-Central Ontario
Probably should have the fuel line replaced, I think every single one of that series sucked air through micro pores in the line at some point
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RF1
Posted 8/2/2014 20:56 (#3998697 - in reply to #3998692)
Subject: RE: JD 6400 tractor - trouble bleeding fuel system


SC Ont.
+1
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Tompa
Posted 8/3/2014 05:27 (#3999035 - in reply to #3998697)
Subject: RE: JD 6400 tractor - trouble bleeding fuel system


North shore of Lake Ontario
Also the pump is a spring loaded affair that goes in the top of the tank and sits on a raised bump on the bottom. Tank can flex when warm and the pump will slide of the bump and the outlet pipe will become detached . It slides inside itself . The first signal of a problem is having to bleed the fuel system excessively especially when the tank is below half full.
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tedbear
Posted 8/3/2014 07:09 (#3999096 - in reply to #3998692)
Subject: RE: JD 6400 tractor - trouble bleeding fuel system


Near Intersection of I-35 & I-90 Southern Mn.
DaleK - 8/2/2014 19:54

Probably should have the fuel line replaced, I think every single one of that series sucked air through micro pores in the line at some point


Maybe that's the problem with the 6400 that my nephew has. They've had lots of fuel starvation problems through the years.
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DaleK
Posted 8/3/2014 09:02 (#3999260 - in reply to #3999096)
Subject: RE: JD 6400 tractor - trouble bleeding fuel system


East-Central Ontario
That's a pretty cheap first place to start anyway
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