23B1512640, 23B-15-12640 GEAR RING KOMATSU

The 23B1512640, 23B-15-12640 GEAR RING KOMATSU is a transmission-side ring gear used in Komatsu grader applications. Public parts references identify this number as a ring gear and place it in the transmission’s forward-and-3rd-clutch section, which immediately tells you this is not a cosmetic or low-duty item. It is a power-train component working in a part of the machine where alignment, tooth quality, and dimensional accuracy directly affect how the transmission behaves under load.

Across public listings, the same part number appears in more than one writing style: 23B-15-12640, 23B1512640, 23B 15 12640, and 23B.15.12640. That matters for SEO and for parts matching, because buyers often search with or without hyphens. The catalogs and reseller references also vary in naming, showing it as “GEAR,RING,” “GEAR,” or simply “RING,” but the part number stays consistent across those references.

From the uploaded images, this component has the visual profile of a wide annular ring gear with precision-cut teeth on both the outer and inner circumference. The part appears heavily machined, symmetrical, and built for controlled transmission engagement rather than exposed chassis duty. That dual-tooth geometry is exactly what you expect from a transmission component that must interact with surrounding internal parts inside a compact assembly, where misalignment or tooth wear would quickly create shifting problems, noise, or uneven load transfer.

What the 23B-15-12640 GEAR RING KOMATSU Does

The strongest clue about the job of the 23B-15-12640 GEAR RING KOMATSU is its catalog position. Public Komatsu parts references place it in the transmission forward-and-3rd-clutch section on multiple grader models and serial ranges. In practical terms, that means this ring gear belongs to a clutch/transmission group responsible for controlled torque transfer during specific drive conditions, rather than to an outer axle or final drive section.

That placement also explains why this part is important even though it looks simple at first glance. A ring gear inside this kind of assembly is not just a round toothed component. It acts as a precision element in a tightly packed mechanical sequence where clutch packs, pistons, springs, dowel pins, and sealing elements all work together. When one gear ring in that system wears, chips, or loses dimensional stability, the result is rarely isolated. It can influence engagement feel, torque continuity, gear holding stability, and the long-term wear pattern of neighboring parts. That conclusion is a practical inference from the assembly location shown in the public parts breakdowns.

The images support that reading. This is not a lightweight stamped part, and it is not shaped like a simple spacer ring. The face width, deep teeth, and robust cross-section suggest a load-bearing transmission role. The inner and outer tooth sets indicate that the 23B-15-12640 GEAR RING KOMATSU is meant to work within a layered internal assembly where controlled meshing and fixed positioning matter just as much as raw strength.

Why This Matters in Real Operation

In real machine use, graders spend long periods working under varying traction, speed, and load conditions. Transmission components in that environment must do more than rotate. They must keep their geometry under repeated torque changes, vibration, heat, and stop-start work cycles. A ring gear in the forward-and-3rd-clutch section has to maintain consistent tooth engagement so the rest of the clutch group can do its job without shock loading or irregular contact. That is why buyers looking for 23B-15-12640 or 23B1512640 are usually not just replacing “a gear.” They are protecting transmission behavior as a whole.

For workshops and fleet managers, the value of the 23B-15-12640 GEAR RING KOMATSU lies in predictability. When this part is matched correctly to the machine and serial range, it helps restore the intended geometry of the clutch-related transmission group. When the number is guessed, or when the part is sourced without serial verification, the risk shifts from procurement to downtime. On heavy equipment, that is where the real cost begins.

Confirmed Public Model References for 23B-15-12640 / 23B1512640

Public parts catalogs and listings tie this part number to Komatsu grader transmission applications, especially in the forward-and-3rd-clutch assembly. The references below are the most defensible model associations I found online, but serial number confirmation is still the correct final step before ordering.

Komatsu models publicly associated with this part number

• Komatsu GD605A-5, serial range beginning 1001-UP, listed in transmission forward-and-3rd-clutch references.

• Komatsu GD611A-1, serial range beginning 10001-UP, listed in transmission forward-and-3rd-clutch references.

• Komatsu GD621A-1, serial range beginning 10001-UP, listed in transmission forward-and-3rd-clutch references.

• Komatsu GD623A-1, serial range beginning 30001-UP, listed in transmission forward-and-3rd-clutch references.

• Komatsu GD625A-1, serial range beginning 50001-UP, listed in transmission forward-and-3rd-clutch references.

• Komatsu GD625A-1 for North America, serial range beginning 60001-UP, listed in transmission forward-and-3rd-clutch references.

• Komatsu GD661A-1, serial range beginning 10001-UP, listed in transmission forward-and-3rd-clutch references.

Some reseller pages simplify the fitment and present 23B-15-12640 mainly as a GD661 grader part, while broader catalog references show a wider family of grader applications. That is why the safest buying method is to match the part number together with the exact model and serial number, especially on machines with serial-range splits inside the transmission catalog.

Visual Analysis of the Uploaded Part

The uploaded photos show a component with evenly cut outer teeth, a second internal tooth pattern, a thick ring section, and a relatively wide working face. This is a very useful visual combination for identification. Even before opening a catalog, those design cues point toward a transmission gear ring rather than a simple retaining ring, bearing race, or external drive sprocket. The part looks purpose-built for enclosed power-train service.

The outer teeth appear deep and consistent, which is important for smooth engagement under load. The inner teeth are also sharply defined, indicating that the 23B-15-12640 GEAR RING KOMATSU is not just meant to sit in position; it is meant to interact precisely with neighboring components. The machining quality visible in the photos also suggests a part where backlash, tooth form, and concentricity matter. On transmission parts, these details are not aesthetic. They are the difference between predictable power transfer and premature wear.

The dark finish and solid section also fit the expectations of a serious drivetrain component. In field terms, this is the kind of part technicians expect to find inside a high-duty transmission assembly where strength, rigidity, and repeated contact are normal working conditions. The shape in the photos strongly supports the catalog evidence placing it in the clutch-related transmission group.

Technical Details and Practical Identification

Below is the most reliable specification-style summary I can build from the public references plus the uploaded images.

Core identification

• Product name: 23B1512640, 23B-15-12640 GEAR RING KOMATSU

• Alternate search forms: 23B1512640, 23B-15-12640, 23B 15 12640, 23B.15.12640

• Public naming seen online: GEAR,RING / GEAR / RING

• Machine category: Komatsu graders

• Assembly location: transmission, forward-and-3rd-clutch section

Physical and functional description

• Annular ring gear format

• Internal and external gear teeth visible in the uploaded images

• Wide face width suited to load-bearing transmission duty

• Machined, enclosed-drive construction rather than exposed undercarriage use

• Intended for precise fit within a multi-part transmission clutch assembly

Approximate weight in KG

A current public listing for 23B-15-12640 shows a gross weight of 2.4 kg. Because that figure is presented as gross weight rather than laboratory net weight, it is best treated as a practical shipping/reference weight for quoting and logistics.

For your product page, the safest wording is:

• Approximate weight: 2.4 kg

• Weight note: gross/reference shipping weight; confirm final packed weight for dispatch

That gives buyers a useful number without overstating a measurement the public sources do not define more precisely.

Why Buyers Search for Both 23B-15-12640 and 23B1512640

Search behavior for heavy equipment parts is always split between hyphenated and non-hyphenated part numbers. The public listings for this component confirm that both 23B-15-12640 and 23B1512640 are in circulation, along with spaced and dotted variations. For SEO, that is good news. It means your product page should naturally include all common search patterns without forcing them.

That is especially important for a product like the 23B-15-12640 GEAR RING KOMATSU because the descriptive naming online is not perfectly standardized. One source may call it a ring, another a gear ring, another simply a gear. Buyers who know the machine may search by function, while buyers working from a parts list may search only by number. A strong product page should serve both behaviors.

Common Reasons for Replacement

A part like the 23B-15-12640 GEAR RING KOMATSU is usually replaced when the transmission is already open for inspection, repair, or clutch-group rebuilding. Gear tooth wear, surface damage, abnormal noise, poor engagement feel, or visible contact pattern problems are all situations where a technician may decide not to reuse the ring gear. Even when the part still “works,” reusing a questionable gear inside a high-labor transmission job is often a false economy.

Another reason this part matters is that gear wear rarely lives alone. If the ring gear has suffered edge damage, uneven tooth contact, or heat-related distress, the surrounding parts deserve attention too. The public assembly references show nearby springs, pistons, plates, a dowel pin, and sealing elements in the same group, which supports a more system-focused inspection approach rather than a one-piece mindset.

Practical buying advice

• Match the part number exactly: 23B-15-12640 or 23B1512640

• Verify the Komatsu model

• Verify the serial range

• Confirm the transmission section is the forward-and-3rd-clutch group

• Cross-check the old part visually if possible

• If in doubt, send the machine serial number before ordering

That last step is especially important because public references show serial-range breaks across several grader families.

Why This Product Page Matters for Serious Buyers

The best heavy-equipment product pages do not just repeat a part number. They help the buyer reduce risk. For the 23B-15-12640 GEAR RING KOMATSU, the real value is clarity: what it is, where it sits, what machines reference it, and why serial verification matters. A buyer looking for this number is usually dealing with a real transmission job, a real deadline, and a machine that earns money only when it is moving.

That is exactly where 3GEN Export fits in. We supply OEM-standard heavy machinery spare parts for global buyers who need reliable sourcing, clear communication, and fast dispatch. Instead of vague listing language, we focus on correct identification, practical support, and worldwide delivery in 5 working days. For workshops, distributors, and fleet operators, that means less guesswork and faster recovery from downtime.

23B1512640, 23B-15-12640 GEAR RING KOMATSU from 3GEN Export

If you are sourcing 23B1512640 or 23B-15-12640 GEAR RING KOMATSU for a grader transmission repair, the smartest path is simple: confirm the model, confirm the serial number, and source from a supplier that understands heavy equipment applications. This is a precision transmission component, not a part to buy loosely.

At 3GEN Export, we support international buyers with OEM-supplier quality standards and worldwide delivery in 5 working days. If your machine is in the GD605A-5, GD611A-1, GD621A-1, GD623A-1, GD625A-1, or GD661A-1 family, this part number is one you should verify carefully against the serial-specific transmission catalog before purchase. Once matched correctly, the 23B-15-12640 GEAR RING KOMATSU becomes exactly what it should be: a dependable, high-duty solution for restoring proper transmission assembly integrity.

Manufactured in Turkey, these products are made using the latest technologies and built to meet the highest international standards. Each machine is a high-quality copy of the original, ensuring durability, precision, and performance that you can rely on for modern construction and metalworking projects.