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| John Deere Tractors Discussion Forum |
Topic: 4020 is Apart
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| David G
01-26-2013 19:39:15
205.215.206.18
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The engine on the 4020D is out and on the way to the machine shop. We found out why the blowby was so bad. The number 3 and 4 pistons had cracked rings and the number 4 was burned out where the first ring was cracked. It has always been a hard starter, but never had any ether. The engine had low oil pressure, so I expected all the bearings to be shot, but the mains and rods looked good. The cam bearings were really worn and down to brass. I wonder if someone did an inframe on it?
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| Tx Jim
01-27-2013 04:28:51
67.142.163.23
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Re: 4020 is Apart in reply to David G, 01-26-2013 19:39:15
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| Rod & main inserts should have a date stamped in them.
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| David G
01-27-2013 16:52:27
205.215.206.18
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Re: 4020 is Apart in reply to Tx Jim, 01-27-2013 04:28:51
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| Just checked them 11/66, right in line for a 1966, just not worn like I would expect on an engine with 8000 hours.
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| David G
01-27-2013 07:41:34
205.215.206.18
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Re: 4020 is Apart in reply to Tx Jim, 01-27-2013 04:28:51
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| | I will check this Thanks
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