CONNECTING ROD BUSHING FOR JOHN DEERE R30939

The John Deere connecting rod bearing with part number R30939 is a universal replacement part designed for use in several John Deere tractors. It is specifically compatible with the 4010, 3020, 4000, 4020, 4230, 3010, and 4040 (U.S.) models. If you are looking for this part for a repair, identifying it by its part number and the exact tractor model is the best place to start.

The role of a connecting rod bearing in the mechanical assembly

A connecting rod bushing is a wear part used as a bearing and guiding surface in a connecting rod assembly. In this type of component, it ensures proper fit between moving parts and is replaced when wear requires a repair.

For this part number, the key information is not a documented dimension or material, but ratherthe John Deere application associated with R30939. This is what allows you to rule out a similar but different bushing, especially on tractors from closely related generations.

John Deere Applications Associated with Part Number R30939

This connecting rod bearing is suitable for several John Deere tractors across different series. The detailed compatibility list is provided immediately following this text to allow you to verify your specific machine, using the designations as they are used for identification.

You’ll find models from the 10, 20, 30, 3010, and 40 series. This is important because a tractor’s commercial name isn’t always sufficient to confirm a fit. The presence of a specific version, such as 4040 (USA), indicates that you must use the exact model designation without simplifying it.

Key factors for selecting this connecting rod bushing

Before ordering, check the following items first:

• the part number you are looking for: R30939;
• the part description: connecting rod bushing;
• the exact tractor model as listed in the compatibility chart;
• the version specified when country- or market-specific details are provided.

These checks are especially important if you’re working on an older machine or one that’s already been repaired, where multiple assemblies may have been installed over time. If you’re unsure between two similar part numbers, it’s best to compare the part number listed in your maintenance documentation or on your old part after removal.

When to Plan for Replacement

Replacing a connecting rod bearing is generally considered during a mechanical overhaul or when wear on the existing part is detected. On a tractor, this procedure should be planned at the same time as identifying the other components associated with the relevant assembly, to avoid unnecessary downtime.

If you are searching for part number R30939 for a John Deere model listed here, take the time to confirm the exact model before confirming your order. This ensures you select the correct part without extending compatibility beyond the intended applications.

Compatibility by Brand and Series

JOHN DEERE · 10 Series

• 4010

JOHN DEERE · 20 Series

• 3020
• 4000
• 4020

JOHN DEERE · 30 Series

• 4230

JOHN DEERE · 3010 Series

• 3010

JOHN DEERE · 40 Series

• 4040 (USA)
• R30939

FAQ — Frequently Asked Questions

What is the purpose of a connecting rod bushing on this type of tractor?

A connecting rod bushing serves as a support and guide within a connecting rod assembly. When it wears out, replacing it ensures a clean start during repairs, provided you verify the correct part number and ensure it is the exact fit for the specific tractor.

Is this R30939 connecting rod bushing compatible with the John Deere 4010, 3020, 4000, 4020, 4230, 3010, and 4040 (USA)?

Yes, this part number is listed for the John Deere 4010, 3020, 4000, 4020, 4230, 3010, and 4040 (USA). However, please verify the exact model designation and the part number listed on your part or in your documentation before confirming the replacement.

How do I identify the correct connecting rod bearing before ordering?

The first indicator is part number R30939, which corresponds to a connecting rod bushing for several John Deere tractors. Next, compare the part name with the exact model of the machine, as the same part series may have different configurations depending on the version.

When should a connecting rod bushing be replaced?

A connecting rod bushing is generally replaced when overhauling a connecting rod assembly or when wear is detected on the existing part. If you’re working on the tractor, take the opportunity to verify that the part number and application match before reassembly.

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