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| John Deere Tractors Discussion Forum |
Topic: Re: 2640 rebuild
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| FrankinFla
02-19-2013 18:21:25
70.196.128.117
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The 2640 uses a 4 cylinder engine with 2 balance shafts. The bearings the shafts run in should be replaced. Replacement requires removing the balance shafts. Not replacing the balance shaft bearings can be the reason for low oil pressure after a rebuid and can lead to major block damage when worn bearings spin in the block.
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| Albert F
02-19-2013 19:27:03
72.173.79.43
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Re: 2640 rebuild in reply to FrankinFla, 02-19-2013 18:21:25
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| Can the bearings for the balance shafts be done in frame or does it require a complete removal?
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| Tx Jim
02-20-2013 04:58:28
67.142.163.27
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Re: 2640 rebuild in reply to Albert F, 02-19-2013 19:27:03
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Can't isn't a good word but replacing balancer brgs with engine on an engine stand would be a lot easier IE the rear brgs would be a booger to replace with engine in the tractor.
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| Tim S
02-20-2013 06:00:32
68.75.29.193
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Re: 2640 rebuild in reply to Tx Jim, 02-20-2013 04:58:28
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| You "Can't" get the rear bearing out while it's in the tractor...also check your clean air connections ,if it is drawing dirty air in on the clean side it will break all the top rings,,quickly,,I use ether and spray around the pipes to check them, if you have a leak the rpm's will pick up.
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