90-TOOTH REDUCER RING FOR JOHN DEERE L40010

The L40010 90-tooth reduction gear ring is a transmission component designed for the front axle of John Deere tractors, depending on the applications specified for this part number. It is installed in the front reduction assembly and is selected primarily based on one key criterion: its number of teeth, 90. Before replacing it, compare the part being removed with the part number listed on your assembly.

The role of this ring gear in the front axle

In a front axle reduction gear, the ring gear works with the other gears in the assembly to transmit motion through the reduction mechanism. It is a mechanical component that directly engages with the internal gearing of the reduction gear, which is why it is crucial to install a part with the correct part number.

During a refurbishment, this ring gear is generally replaced when the teeth show visible wear, when a complete disassembly of the differential requires an overhaul of the gears, or when a damaged part must be replaced with a well-recognized equivalent part.

Useful identifiers for part number L40010

This part number corresponds to a 90-tooth reduction gearbox ring gear. Counting the teeth is the first step to verify, as several gears may coexist in the same front axle without being interchangeable. A simple visual resemblance is therefore not sufficient to confirm the correct choice.

Part number L40010 can also be cross-referenced with the following comparison numbers: 04349973, 4472325048, and 83934014. These correspondences are useful for cross-referencing a search, but they do not replace the need to verify the installed part, its exact location, and the number of teeth.

If you disassemble the assembly, the goal is to avoid confusing this ring gear with another front axle gear. The proper method is to verify the part number you are looking for, the number of teeth, and the intended application on the tractor.

John Deere Applications Associated with This Ring Gear

The L40010 crown gear is associated with several John Deere tractors listed in the applications for this part. It applies to models in the 40 and 50 Series included in the selection linked to this part number, for front axle assemblies equipped with the corresponding reduction gear.

Even when the tractor model is listed among the compatible applications, it is still advisable to verify the part currently installed. On machines of this age, a complete front axle or reduction gear assembly may have already been replaced, which justifies a direct inspection before ordering.

When to Inspect or Replace This Ring Gear

This part is typically inspected during work on the front transmission, a reduction gear overhaul, or the replacement of a worn gear. A correctly identified ring gear ensures that the assembly is compatible with the rest of the mechanical system.

To select the correct part, simply compare part number L40010, the number of teeth, and the John Deere application corresponding to your tractor.

Compatibility by Brand and Series

JOHN DEERE · 2140 Series

• 3140
• 3040
• 3340
• 3640
• 3050
• 3150
• 3350
• 3650

JOHN DEERE · 2140 Series · NUMBER OF TEETH

• 90

FAQ — Frequently Asked Questions

Where is the L40010 reduction gear ring gear installed?

This ring gear is installed in the front axle reduction gear. It is part of the gear set responsible for transmitting power through the front reduction, so it is important to carefully verify the exact location of the part being replaced before ordering.

How can I verify that the 90-tooth version is the correct one?

The first step is to count the teeth: this part number corresponds to a 90-tooth reduction gear ring. It is also recommended that you compare the part number listed on your existing part or in your maintenance records to avoid any confusion with another front axle gear.

Is this ring gear compatible with John Deere models 2140, 3140, 3040, 3340, 3640, 3050, 3150, 3350, and 3650?

Yes, these John Deere models are associated with this part number for the specified applications. Before replacing it, however, check the part currently installed on the tractor, as the front axle or final drive assembly may have been replaced during the machine’s service life.

What do the numbers 04349973, 4472325048, and 83934014 refer to?

These numbers can help match this ring gear to other comparison part numbers encountered during a parts search. They do not replace verifying the number of teeth, the part number L40010, and the exact application on your John Deere tractor.

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