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Z129 Engine number vs TO-30 Serial Number

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Jim in OH

02-09-2006 14:40:26

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Here is something that I put together to help identify and correlate tractor years and engine serial number. We all know that the Z129 engine numbers were not exactly serially installed in the TO-30, but from the graph, it is close enough to tell if you are not near the changeover at the year end. The data is from the tractor registery on this site with all obvious omissions and mistakes eliminated..

Have Fun!!!

Click HERE for a link is to a .PDF version that you can download... save... print etc... Jim in OH

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gshadel

02-10-2006 09:05:22

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Re: Z129 Engine number vs TO-30 Serial Number in reply to Jim in OH, 02-09-2006 14:40:26

Awesome work Jim!

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dfitch

02-10-2006 08:35:46

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Re: Z129 Engine number vs TO-30 Serial Number in reply to Jim in OH, 02-09-2006 14:40:26

Jim - very good work, I was unaware of the registry but have now added TO 30 to it.

Serial number TO 62906

I noticed there were several others in there with the same engine casting number as mine

Z129A600 any thoughts as to why we has the same number. Looks like mine is one of the earlier ones made

Thanks again

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dfitch

02-10-2006 11:12:38

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Re: Z129 Engine number vs TO-30 Serial Number in reply to Jim in OH, 02-10-2006 10:19:06

Thanks Jim EN plate is missing on my tractor

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Jim in OH

02-10-2006 07:44:04

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Re: Added Info... in reply to Jim in OH, 02-09-2006 14:40:26

As a pretty good predictor of engine number (EN), or Tractor Serial Number(SN) use:

EN=SN+240,000 (or SN=EN-240,000) [+/-2500, 95% confidence]

The standard deviation of these 55 samples is +/- 1250 from this prediction which means that at two standard deviations (+/- 2500) you can be about 95% certain of the correct number range... If you want to be 99% sure, use three standard deviations (or +/- 3750)... [Of course this assumes that your engine has not been replaced by another one of different vintage.]

Jim in OH

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Buss

02-10-2006 06:09:52

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Re: Z129 Engine number vs TO-30 Serial Number in reply to Jim in OH, 02-09-2006 14:40:26

Excellent work Jim and thanks alot.
And thanks to Glen for pointing out this post.

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Jerry/MT

02-09-2006 17:44:32

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Re: Z129 Engine number vs TO-30 Serial Number in reply to Jim in OH, 02-09-2006 14:40:26

Excellent piece of work, Jim! there have been a few folks asking aboutthe year of there machine that didn't have serial number plates on there tractors. This will allow them toget close.

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Jerry/MT

02-09-2006 17:44:09

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Re: Z129 Engine number vs TO-30 Serial Number in reply to Jim in OH, 02-09-2006 14:40:26

Excellent piece of work, Jim! there have been a few folks asking aboutthe year of there machine that didn't have serial number plates on there tractors. This will allow them toget close.

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