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John Deere Tractors Discussion Forum
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4020 D not starting

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j heitkemper

05-22-2007 19:27:42




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4020 shut down today like she had run out of fuel .Had .plenty fuel ,,pump lines are working ,,Air filter was dirty but not terribly so ,, BIG PROBLEM ,WHILE CRANKING THE MOTOR TO START, THE INTAKE WILL NOT SUCK AIR ,. will take valve cover off to check valves ,,,this thing has me puzzled ,,Surely the motor is not so worn out that it has no compression ? , I always considered the motor to be like new ,Thanx for , Any help ,, Jim

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dieselade

05-23-2007 03:46:45




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 Re: 4020 D not starting in reply to j heitkemper , 05-22-2007 19:27:42  
check the electrical connection behind the inj pump. hard to get to. just like any connection it can get dirty and cause a no start.



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msb

05-22-2007 20:18:54




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 Re: 4020 D not starting in reply to j heitkemper , 05-22-2007 19:27:42  
Remove the injection pump timing cover and flywheel cover and turn the flywheel with a large screwdriver to see if the camshaft and oil pump drive gear is still intact.Lots easier and quicker than removing the valve cover.



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