| The identification of John Deere Parts at times, | | | | This casting number phenomenon is not restricted |
| are not as simple as providing a serial number of | | | | to water pumps only. When ordering an engine |
| a machine, or a serial number of an engine, and | | | | overhaul kit, the piston number, and the |
| then the parts are looked up in the parts | | | | connecting rod casting numbers are sometimes |
| catalogue. Experience has proven that this | | | | required to identify which components are |
| method is not as straight forward was many, | | | | compatible. |
| including myself, would prefer it to be. | | | | Marine engines, as compared to construction |
| To begin with, lets start with John Deere water | | | | engines, will have slightly varying components. An |
| pumps. Using a 4045 John Deere engine as an | | | | engine block for the marine engine for the 4045 |
| example, perusing the parts manuals would reveal | | | | engine can be slightly different from the engine |
| many different water pumps that may fit a 4045 | | | | block for a 4045 tractor engine. Both are made |
| engine. Taking into consideration that there are | | | | for different applications, and can be different. |
| 4045, 4045D, and 4045T engines, the number of | | | | Marine engines are specially designed for |
| water pumps available will increase. In some | | | | continuous operations. |
| instances, the application (e.g Ag,or Construction) | | | | To answer the question as to whether an engine |
| will assist in zoning into the correct pump. | | | | block from the marine can be interchanged for an |
| However, in almost most cases, the combinations | | | | engine block from a generator, for example, two |
| of pumps would require additional information. In | | | | things must be done. |
| this case, the number that is casted on the old | | | | One, compare the casting numbers on both |
| water pump is needed. This is known as a | | | | blocks. This is embossed on the side of the |
| "Casting Number." On the housing of the pump, a | | | | cylinder block. If the two numbers are identical, |
| number will be embossed. | | | | then the interchangeability is possible. |
| Typically, this begins with the letter "R" or "T." | | | | Two, compare the SAE housings of the two |
| Thus, both T29701 and R55971 are John Deere | | | | engines. It's no use switching engine blocks around, |
| water pump casting numbers. | | | | to find out at late that the SAE housings are |
| The 4045 John Deere engines made in Dubuque, | | | | different, and therefore, the transmission cannot |
| with no turbocharger, will have a water pump part | | | | be bolted on. |
| number of RE21177. The part number of the | | | | While writing on the issue of John Deere casting |
| housing is AR80109. John Deere will list both of | | | | numbers, other relatively simple information is |
| these numbers as having a casting number of | | | | invaluable in identifying correct parts and part |
| R59049. | | | | numbers. A simple as it may sound; the exact |
| The turbocharged John Deere Dubuque engine will | | | | model of the machine is needed. A 310 backhoe is |
| have a water pump part number of AR77142. | | | | not the same as a 310G backhoe. The serial |
| The housing part number is AR80116. This engine | | | | number of the machine is also needed. A serial |
| water pump has two different casting numbers, | | | | number will include the engine model, and the |
| R90784, and R104648. Provide these numbers to | | | | machine type. John Deere's online system offers |
| your aftermarket parts dealers when requesting a | | | | a free service whereby the serial number of the |
| new water pump, or a water pump overhaul kit. | | | | machine is inputted, and JD's data is provided. |