ENGINE OIL PRESSURE SENSOR FOR JOHN DEERE RE208261

The RE208261 engine oil pressure sensor is a control component designed for use in several John Deere tractors. Installed in the engine monitoring system, it transmits the oil pressure data needed to monitor proper lubrication. This part number is intended for the applications listed for the 40, 50, 8050, and 8640 series; the specific application must be confirmed by the part number and the exact model of the machine.

Role of the Sensor in Engine Monitoring

An engine oil pressure sensor measures the pressure in the lubrication system and sends this information to the machine’s control system. On a tractor, this data allows for monitoring the engine’s lubrication status during operation.

When the sensor becomes inaccurate or fails, the pressure reading may become inconsistent, intermittent, or absent. Replacing it with the correct part number restores a reading that matches the machine’s intended configuration without modifying the existing equipment.

John Deere Applications for Part Number RE208261

This part number is listed for several John Deere tractors. A detailed list of compatible models is included with the product sheet, specifically for models in the 50, 40, 8050, and 8640 series. This is a useful reference if you maintain a tractor from these generations and are looking for the sensor corresponding to part number RE208261.

For this type of part, identification by part number remains essential. Even within the same tractor family, there may be variations depending on the model year, instrumentation, or assembly changes. If your machine has already been repaired, compare the part number currently installed with the one you’re looking for before placing an order.

Useful guidelines for selecting the right sensor

The first selection criterion is part number RE208261. Next is the exact application for the tractor in question. For an oil pressure sensor, it is best to check:

• the part number on the old sensor, if it is legible;
• the exact tractor model;
• compatibility with the engine oil pressure monitoring system.

These checks are particularly useful when several similar sensors are located close together on the engine. A temperature sensor, a switch, or another transmitter may look similar without performing the same function.

When to Replace It

Replacement of this sensor should be considered when oil pressure readings are inaccurate, fluctuate without an identifiable mechanical cause, or no longer correspond to the engine’s normal behavior. In this context, the sensor is one of the components that should be inspected alongside the lubrication system and associated instrumentation.

If you are looking for this part for a John Deere model covered by the intended applications, verify the exact tractor model and part number RE208261 to confirm your selection before installation.

Compatibility by Brand and Series

John Deere · 50 Series

• 4050
• 4250
• 4450

John Deere · 40 Series

• 4640
• 4840
• 8440

John Deere · 8050 Series

• 8850

John Deere · 8640 Series

• 8640

FAQ — Frequently Asked Questions

What is the purpose of an engine oil pressure sensor like the RE208261?

This sensor monitors engine oil pressure and transmits this information to the machine’s control system. It plays a crucial role in monitoring engine lubrication. If the sensor fails, the displayed information or associated signal may become inconsistent or absent.

On which John Deere tractors is this sensor recommended?

This part number is recommended for John Deere tractors in the 50, 40, 8050, and 8640 series, with the models listed in the compatibility section of the product sheet. Be sure to use the exact model designation and verify part number RE208261 before ordering, especially for a machine that has already been repaired or modified.

How can I confirm that part number RE208261 matches my machine?

The most reliable way to verify this is to compare part number RE208261 with the sensor currently installed or with your tractor’s maintenance manual. Also verify the exact application of the machine in question. This precaution is useful when multiple variations of instrumentation or wiring harnesses exist within the same tractor family.

When should an engine oil pressure sensor be replaced?

This sensor is generally replaced when the oil pressure reading becomes unstable, remains at zero without a confirmed mechanical cause, or when a sensor malfunction is suspected. Before replacement, it is prudent to distinguish between a sensor failure and an actual engine oil pressure problem.

Original replacement part numbers and brands are provided for comparison purposes only. This does not imply that these are original parts.