Author	[Modern View]
Jethro Lilley 02-20-2013 13:04:43 70.192.218.47 Report to Moderator	If Tim S is right and the engine is dusted then a rebuild is called for. If not, then it sounds like oil is coming by the rings for some reason. Either the oil ring is not working or the cylinder is glazed. You state that your guess is 3000 hours since a rebuild 15 yrs ago, and your dad ran it 3 yrs and reired. Then the tractor sat with minimal use for 12 yrs. One has to work a tractor for 15 years at 200 hrs per year to accumulate 3000 hrs. 200 hrs is a lot of work for a tractor that is probably not the primary tractor. Probably has a lot fewer hours on that rebuild. It took me 20 yrs to get 5500 hrs on my 2510 before I rebuilt it. Let's assume the cylinders have glazed for a minute... If the rebuild did not include proper scoring of the cylinder walls prior to installing pistons, head etc. and/or unburnt fuel/oil has glazed the cylinder walls to where the rings will not seat, then there is an easy trick to try that was done on my dad's D6 Caterpillar when it was new and suffering excessive oil consumption. A factory man came to the field dressed in a business suit and told dad to take the air filter off and start the engine. He then sprinkled some Bon-Ami (Ajax, Comet) into the air intake side of the engine, like one would salt a hamburger using his thumb and forefinger. He did this about three times over the span of a few seconds. He then allowed the engine to run a minute or so and told us to "Shut'er down and change the oil." The Cat immediately stopped losing oil. The Bon Ami broke the glaze on the cylinder walls allowing the rings to seat and the oil change removed all traces of the abrasive before harm came to the bearings. If Tim's test proves no RPM loss then the engine hasn't been "dusted" so try this... it's cheaper than rings and sleeves and if a rebuild was needed after all, what have you lost? 7 qts and a filter? Cheaper than a couple of grand for a rebuild. [Reply]   [No Email]
Albert F 02-20-2013 14:53:22 72.173.79.43 Report to Moderator	Re: 2640 rebuild in reply to Jethro Lilley, 02-20-2013 13:04:43   So this Bon-Ami stuff, is it available today or is comet and ajax the same stuff? I am anxious to give her a try as a tried the ether trick and saw no change in the rpm's. Thanks [Reply]  [No Email]
Jethro Lilley 02-20-2013 16:19:54 70.192.218.47 Report to Moderator	Re: 2640 rebuild in reply to Albert F, 02-20-2013 14:53:22   Google it. Use the original formula if you can. [Reply]  [No Email]
Jethro Lilley 02-20-2013 16:27:08 70.192.218.47 Report to Moderator	Re: 2640 rebuild in reply to Jethro Lilley, 02-20-2013 16:19:54   I believe I've seen it at True Value Hardware. [Reply]  [No Email]
Tim S 02-20-2013 13:24:07 68.75.29.193 Report to Moderator	Re: 2640 rebuild in reply to Jethro Lilley, 02-20-2013 13:04:43   This is all good advice,, I have forgotten about using Bon Ami, I heard about it from a friend of mine that had construction equipment,I have never used it yet.. [Reply]  [No Email]
Tx Jim 02-20-2013 13:41:31 67.142.163.22 Report to Moderator	Re: 2640 rebuild in reply to Tim S, 02-20-2013 13:24:07   Yep JD's branch area service manager did the Bon-Ami thing back in the day. [Reply]  [No Email]