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Bleed Procedure for a 4020 Diesel?

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Dsl

03-09-2001 19:51:14




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I've got this online female farmer friend that has
a 4020. She was experiencing power loss, most
likely due to fuel gelling, so I told her to
change the filters. She did, and now can't get
fuel out of the top filter. She has a primer pump
underneath the tank, and says she can't get it to
pump any fuel. Likely whipped from lack of use. I
can't tell you what year her 4020 is, but she
mentioned it's starting system being a pain in the
neck, so it must be a 24V, if that's any help.
She's in one heckova panic here, so, being 1200
miles away, and unfamiliar with them anyway, I did
the only
thing I knew, and that was turn to the experts.
Thanks for any help.

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twopop

03-10-2001 08:32:58




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 Re: Bleed Procedure for a 4020 Diesel? in reply to Dsl, 03-09-2001 19:51:14  
as JT stated the motor may need to be rolled over until the cam is relaxed from the operating arm inside the engine.if she cant feel pressure on the little operating lever then bump the engine with the starter a little at a time until she feels resistance on the lever.then loosen bleed screw on the filter,also take the fuel return line loose at the injection pump,its the line with the 9/16 nut(not an injector line) and pump the primer until fuel comes out the pump at the return line.if she has not tried to start the engine without the filters full it wont be necessary to loosen the injector lines.Another thing that can cause power loss is if the neoprene gasket on the governor has started to come apart it will plug off the return line and build pressure inside the pump and either kill the engine or loose rpm.

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luckydog

03-10-2001 05:36:33




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 Re: Bleed Procedure for a 4020 Diesel? in reply to Dsl, 03-09-2001 19:51:14  
dsl--On top and to the side of the fuel filter block there is a bolt which will take a 9/16 wrench to loosen 2 0r 3 turns. It will let the air out of the fuel filters while you prime the pump by pushing the lever on the fuel pump. You will get very little fuel flow if you don't loosen that bolt. Pump that lever until all the air stops coming out of the bleeder bolt then tighten the bolt. Then turn the engine over several times and it should start. If it is jelled you may have to thall all fuel lines and the bottom of the tank to make sure it has fuel flow because it is still jelled in the lines. Hope this helps luckydog

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J T

03-09-2001 21:25:16




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 Re: Bleed Procedure for a 4020 Diesel? in reply to Dsl, 03-09-2001 19:51:14  
I just helped a friend of mine do this tonight. His tractor was full of fuel, we used the hand pump to push fuel out of the top fuel filter then to the pump. Then loosened all the injector lines , rolled the engine several times till we got the fuel tightened them and it fired right up. The hand pump , we had to turn the engine a little till it was not actuated by the cam. I am no expert by no means but this worked for us.

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