| John Deere, like other engine manufacturers, uses its | | | | engine serial number of the next engine on the same |
| unique terminology and arrangements, to mark its | | | | assembly line will be 123457. This will continue until John |
| products, and to assign part numbers. Understanding | | | | Deere decides its time to upgrade or to build another |
| this marking categorization and system is crucial to | | | | model of engine. |
| part number identification, which is then used to select | | | | There are many variations of the above engine serial |
| engine kits, components, and maintenance parts. | | | | number. The model 4045T can be marked 4045D. |
| A typical engine serial number looks like | | | | Here the "D" symbolizes that the engine is a diesel |
| TO4045T123456. To better understand this number, it | | | | engine (some early John Deere engines were |
| will be split into several parts. The first segment is the | | | | manufactured to operate on gas), and that's it's |
| two initial letters "TO." These two initial letters indicates | | | | naturally aspirated, i.e., it's not turbocharged. Thus, this |
| two things:- one, which country the engine was | | | | serial number could have been TO4045D123456 and |
| manufactured in, and secondly, if the engine is | | | | this would have been a totally different engine from |
| Powertech or non-Powertech. | | | | the TO4045T123456. |
| All John Deere engines manufactured in Dubuque, | | | | The 4045 in serial numbers can also be 3152, 3164, |
| Iowa, USA, are preceded by the letters "TO," all | | | | 3179, 3029, 4202, 4219, 4239, 4039, 4276, 6303, 6329, |
| engines preceded by "CD" are manufactured in Saran, | | | | 6059, 6414, 6068, 6414, 4270, 6404, 6466, or 6076. |
| a factory located in the Loiret area of France, and all | | | | They can be followed by a "D", a "T" or a "H." |
| engines manufactured in Torreon, Mexico, are | | | | The issue of how to identify which engines are |
| preceded by the letters "PE." | | | | PowerTech engines and which are not |
| The next set of numbers in the John Deere engine | | | | non-PowerTech engines often arises. This can be |
| serial number are four (4) or (5) numbers and letters. In | | | | solved by further dissecting the John Deere Engine |
| our example, this refers to "4045T." This can be | | | | serial number. |
| further sub-divided into the "4045" and the "T". The | | | | For the engines made in Dubuque, Iowa, USA,(TO |
| 4045 indicated that this is 4045 model. The initial "4" | | | | Engines) all engines with a sequence number more |
| indicates that the engine is a four (4) cylinder engine. | | | | than 700,000 are all Powertech engines. |
| The "T' that's comes after the engine model number | | | | For the engines made in Sarran, France,(CD engines) |
| tells that the engine has a turbocharger attached onto | | | | all engines with sequence serial number more than |
| it, and thus this is a turbocharged engine. This factor is | | | | 500,000 are all Powertech engines. |
| significant as turbocharged engines are designed | | | | On the contrary, however,, all John Deere engines |
| differently from non-turbocharged engines. Most | | | | made in Torreon, Mexico, (PE engines) are |
| importantly, parts may not be interchanged between | | | | PowerTech engines. This sequence serial number |
| these two kinds of engines. | | | | began with one thousand (1000). Thus, all PE |
| The last set of six (6) numbers is the sequential | | | | PowerTech engines will have a sequence serial |
| number of the engines as it comes off the assembly | | | | number of one thousand (1000) and up. |
| line. If this engine number is 123456, then the next | | | | |