DIFFERENTIAL OIL PRESSURE SENSOR FOR JOHN DEERE RE179984

The RE179984 differential oil pressure sensor is a replacement part designed for John Deere tractors in the 7020, 8030, 9020, 9030, and 8R series. Its function is related to monitoring the oil pressure in the differential. If you are replacing a faulty sensor in this system, the part number and the correct machine application are the first things to check.

Role of the Sensor in the Differential Oil Circuit

In a tractor, the differential operates with its own lubrication system, and its proper functioning depends, in particular, on maintaining oil pressure that meets the specifications for the specific installation. A sensor of this type is used to monitor this pressure information in the relevant circuit.

This part does not affect the pressure itself; rather, it helps monitor it. When a sensor is worn, damaged, or no longer provides a consistent signal, replacing it ensures that a part suitable for the differential’s specific application is used.

Part Number RE179984 and Listed Applications

Part number RE179984 refers to a differential oil pressure sensor. It is used as a replacement on several John Deere models. A detailed list of compatible models follows this description, with models organized by series for easy identification.

Applications include tractors in the 7020, 8030, 9020, 9030, and 8R series. This wide range of applications makes it particularly important to verify the part number: even within the same brand, multiple sensors may be used depending on the monitored function, the model year, or the machine’s specifications.

Helpful tips for choosing the right sensor

To select this part, start by noting the part number listed or corresponding to RE179984 and confirm that you are indeed looking for a differential oil pressure sensor. This step helps avoid confusion with a sensor for the engine, transmission, or another hydraulic circuit.

Knowing the exact tractor model is also essential. Even if the part is listed as compatible for a specific series, you should still verify compatibility on the specific machine in question, especially if it has been repaired previously. In practice, it’s best to compare the old, removed part with the new part number before installation.

When should you consider replacing it?

This sensor is typically replaced when the existing part is inoperable or damaged, or when you are working on the differential system and wish to install a part that is compatible with the intended application. With this type of component, an inaccurate identification can lead to ordering a part intended for a different measurement point.

If you’re looking for the correct part number for your John Deere tractor, refer to part number RE179984, the differential application, and the exact model designation listed in the compatibility chart.

Compatibility by Make and Series

John Deere · 7020 Series

• 7720
• 7820
• 7920

John Deere · 8030 Series

• 8130
• 8230
• 8330
• 8430
• 8530

John Deere · 9020 Series

• 9120
• 9220
• 9320
• 9320 T
• 9420
• 9420 T
• 9520
• 9520 T
• 9620
• 9620 T

John Deere · 9030 Series

• 9230
• 9330
• 9430
• 9530
• 9630

John Deere · 8R Series

• 8225 R
• 8245 R
• 8270 R
• 8295 R
• 8295 RT
• 8320 R
• 8320 RT
• 8345 R
• 8345 RT

FAQ — Frequently Asked Questions

What is a differential oil pressure sensor used for?

A differential oil pressure sensor is used to transmit pressure data from this circuit. This data allows you to monitor the differential’s lubrication system. For this part number, identification is primarily based on its use in the differential and the part number RE179984.

Is part number RE179984 compatible with John Deere 7020, 8030, 9020, 9030, and 8R series tractors?

Yes, part number RE179984 is suitable for the models listed in these series; a complete list of compatible tractors is provided on the product sheet. However, you must verify the exact model of the machine and the part number on the removed component, as a single series may include several different configurations depending on the equipment.

How do I identify the correct sensor before replacement?

The safest approach is to verify part number RE179984 and its application to the differential. Also note the exact tractor model, then compare the mounting location and the type of sensor already installed. This check prevents you from mistaking a differential sensor for a part intended for another oil circuit.

Does this sensor replace any oil sensor on the tractor?

No, this sensor is designed for the differential oil pressure system. It should not be confused with a sensor for the engine, transmission, or any other hydraulic system. The function it monitors and the part number are the two key factors for selecting the correct part.

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