ROCKER ARM SHAFT FOR JOHN DEERE, Ø 40 MM, L57725

The John Deere swing arm shaft with part number L57725 is a hinge component used on various tractors in the 40 and 50 Series. Often referred to as a “pivot,” it can be identified here by two simple measurements to check before replacement: Ø 40 mm and length 107.4 mm. These are the first things to check to correctly identify the part.

A Pivot Pin Sought After as a “Pivot”

In this family of parts, the rocker arm pin serves to provide the mechanical connection for an articulated assembly, depending on the tractor’s specific configuration. It is a guiding and retaining component that works in conjunction with the other elements of the assembly. Over time, wear on the bearing surface, signs of friction, or abnormal play may necessitate its replacement.

The term “pivot” is commonly used when searching for agricultural parts. Here, the specific term “swing arm shaft” helps distinguish this part number from other similar shafts found on the same tractor. If you’re working on an already disassembled assembly, it’s helpful to compare the overall shape, dimensions, and part number listed in your documentation.

The Critical Dimensions for Selecting the Correct Part Number

For this part, dimensional verification remains the most important step before ordering. The data sheet specifies a diameter of 40 mm and a length of 107.4 mm. On a shaft of this type, even a slight deviation can prevent proper installation or result in unwanted play in the joint.

If you are replacing a removed part, take the time to measure the existing shaft and inspect its condition along its entire length. Also verify the intended mounting location on the machine. The associated installation guide also refers to reference number 21 on the diagram, which may be helpful if you are working from a corresponding exploded view.

John Deere 40 and 50 Series Applications

Part number L57725 is compatible with John Deere 40 and 50 Series tractors. A detailed list of compatible models is provided directly on the product page, including exact model designations and version or country-specific variants where applicable.

This level of detail warrants attention. A model that appears similar may not necessarily use the same rocker arm shaft, and variants such as Deutschland, Espana, USA, F, S, N, CS, or TSS should not be overlooked during inspection. It is therefore necessary to compare the tractor’s full model designation, rather than relying solely on the main model number.

How to Confirm Part Number L57725

To ensure your selection is correct, cross-check three elements: the part number L57725, the dimensions Ø 40 mm and 107.4 mm, and the exact tractor model in the application list. This simple method helps rule out common confusion between several axles or pivots that look similar.

Before finalizing your order, it may also be helpful to examine the parts in contact within the joint to understand the cause of the observed wear. If your verification confirms the part number, dimensions, and application, you can order this swing arm pin with greater confidence.

Dimensions and Technical Specifications

• Ø 40 mm
• 107.4 mm

Compatibility by brand and series

John Deere · 40 Series

• 1640 (Germany)
• 1640 (Spain)
• 1640F
• 1840 (Germany)
• 1840 (Spain)
• 1840F
• 2040 (Germany)
• 2040 (Spain)
• 2040 (USA)
• 2040F
• 2040S (Germany)
• 2040S (Spain)
• 2140 (Germany)
• 2140 (Spain)

John Deere · 50 Series

• 2250 (Germany)
• 2250 (Spain)
• 2250F
• 2450 (Germany)
• 2450 (Spain)
• 2450F
• 2650
• 2650CS
• 2650F
• 2650N
• 2650TSS
• 2850 (Germany)
• 2850 (Spain)

FAQ — Frequently Asked Questions

What does part number L57725 refer to?

Part number L57725 refers to a swing arm shaft, also known as a pivot shaft depending on workshop diagrams and terminology. To identify it correctly, cross-reference this part number with the two dimensions listed on the product sheet and with the exact model of your tractor.

What dimensions should be checked before ordering this shaft?

First and foremost, check the diameter (40 mm) and the length (107.4 mm). On a swing arm shaft, these two measurements are critical to avoid installation errors. Compare them with the old part you removed and with the corresponding location on your tractor.

Is this rocker arm shaft compatible with all John Deere 40 and 50 Series models?

No, you shouldn’t assume it fits an entire series. This part number corresponds to a specific list of models and variants, including certain Deutschland, Espana, USA, F, S, N, CS, or TSS versions. Always verify the complete part designation listed in the compatibility chart.

Is reference number 21 on the diagram sufficient to identify the correct part?

Reference 21 is a good starting point if you’re working with the same exploded view. However, it’s best to also confirm part number L57725 and the dimensions Ø 40 mm and 107.4 mm, since a single assembly may include several similar shafts.

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