23B-15-11172 HOUSING KOMATSU

The 23B1511172, 23B-15-11172 HOUSING KOMATSU is a heavy transmission-side structural component used on Komatsu motor graders. Public aftermarket listings consistently identify this exact part number as a housing in the transmission and torque parts category, and the clearest publicly verified model reference ties it to the Komatsu GD655 grader. Several listings also present 23B-15-11172 together with the nearby companion number 23B-15-11173, which suggests this housing belongs to a matched internal transmission-clutch housing family rather than a stand-alone external bracket.

From the uploaded product image, the 23B-15-11172 HOUSING KOMATSU has the visual geometry of a cast-and-machined circular housing with multiple reinforced mounting ears, a large central bore, and a precision-machined internal seating surface. That design strongly indicates a role in supporting rotating transmission components, preserving alignment, and carrying load around a clutch, shaft, or bearing-related assembly. In other words, this is the kind of part that matters not because it moves, but because it allows everything around it to move in the correct position under load.

What the 23B-15-11172 HOUSING KOMATSU does

A housing inside a grader transmission is not just a cover. It is a structural locator. The 23B1511172, 23B-15-11172 HOUSING KOMATSU is there to hold critical internal parts in the right relationship to one another, maintain machined clearances, and provide the rigid mounting base that clutch and shaft components depend on. When a housing in this area loses dimensional accuracy from wear, cracking, impact, or poor previous repair, the problem usually spreads outward into seals, bearings, clutch pack alignment, oil control, and gear engagement.

Public references place this part number inside the transmission-and-torque family for the GD655 grader, and catalog fragments from related 23B-15 transmission pages on other grader families show 23B1511172 appearing as an analog on reverse clutch catalog pages. That does not prove universal direct interchange across every grader model, but it does strongly support the conclusion that the 23B-15-11172 HOUSING KOMATSU belongs to the transmission clutch-side architecture rather than the hydraulic system, engine, or tandem drive outer casing.

In practical workshop terms, the 23B-15-11172 HOUSING KOMATSU helps create the fixed mechanical environment that the internal transmission parts need. A grader transmission works under repeated direction changes, torque transfer, shock loads, and long duty cycles. That means the housing has to do several jobs at once: hold shape, protect internals, preserve alignment, support fasteners, and present clean machined faces for mating parts. When that housing is right, the surrounding assembly behaves predictably. When it is worn, cracked, or distorted, the transmission stops behaving like a precise mechanical system and starts behaving like a loose one.

Why this housing matters on Komatsu graders

Motor graders rely on smooth and repeatable driveline response because the operator is constantly adjusting speed, blade angle, articulation, and traction while holding line and grade. Transmission parts on a grader are therefore not just about movement from point A to point B. They affect how accurately the machine can hold working speed and how confidently the operator can control the job. A transmission-side housing such as the 23B1511172, 23B-15-11172 HOUSING KOMATSU contributes to that stability by keeping its related clutch and shaft parts correctly seated and supported.

This matters even more on older grader fleets that are still productive in road building, municipal maintenance, mine access road shaping, and site finishing. In those environments, downtime rarely begins with a dramatic total failure. More often it starts with fitment loss, abnormal internal movement, seal issues, or housing wear around critical machined surfaces. Replacing a worn 23B-15-11172 HOUSING KOMATSU before those issues spread can help protect the larger and more expensive transmission assembly around it.

The value of this part is also in what it prevents. A correct housing helps reduce the risk of uneven clutch loading, oil leakage at mating surfaces, accelerated wear on supported components, and mounting instability during operation. It keeps the transmission assembly behaving like a controlled unit. For procurement teams and workshop managers, that makes the 23B1511172, 23B-15-11172 HOUSING KOMATSU a practical reliability part, not just a catalog line item.

Visual construction and product features

Heavy cast body for structural support

The uploaded image shows a thick-section cast body with evenly distributed external lugs around the circumference. That is exactly the kind of construction normally used where the part must absorb tightening force from multiple fasteners while resisting distortion. On a housing like this, rigidity matters because even small deviations in circularity or face alignment can affect the performance of the transmission components installed inside it.

Precision-machined inner bore and seating surfaces

The bore and internal circular seat visible in the image appear machined rather than left as-cast. That detail is important. It means the 23B-15-11172 HOUSING KOMATSU is not just a rough shell; it is a precision support part that depends on controlled tolerances. Machined seating areas usually indicate locations for bearings, collars, seals, or clutch-related subassemblies, all of which require repeatable positioning to work correctly.

Reinforced mounting ears and flange points

The multiple ear sections around the body are designed to distribute clamping force and hold the housing firmly in place within the transmission structure. On working graders, repeated shock load travels through the drivetrain during changes in direction, blade resistance, and rolling load. A weakly designed housing would concentrate stress. This design spreads it.

Service-friendly circular layout

The circular form of the 23B1511172, 23B-15-11172 HOUSING KOMATSU also makes service logic easier. Parts that mount into or against a circular housing are easier to align during rebuild work when the machining is clean and the bolt pattern is correct. That saves time during assembly and reduces the risk of forced installation.

Publicly verified compatibility

Based on publicly available listings, the clearest verified application for the 23B-15-11172 HOUSING KOMATSU is:

• Komatsu GD655 grader

There is an additional layer of context worth knowing. Reverse-clutch catalog fragments for other 23B-15 grader transmission families, including GD605A-5 and GD625A-1 pages, list 23B1511172 among the analog references for that transmission zone. That is useful as family-level context, but it is still not strong enough to market those machines as direct confirmed fitment for this exact housing without checking serial number, transmission arrangement, and the removed part number from the machine.

Because of that, the professional way to sell or order the 23B1511172, 23B-15-11172 HOUSING KOMATSU is simple: verify the machine model, serial number, and old casting or stamped number before dispatch. That reduces returns, avoids confusion between near-neighbor housings, and protects the buyer from ordering a similar-looking but incorrect transmission component. Public listings that group 23B-15-11172 with 23B-15-11173 also reinforce the need to confirm left/right, front/rear, or paired housing position before shipping.

Technical details of 23B1511172, 23B-15-11172 HOUSING KOMATSU

Product identity

The exact part number appears publicly in both standard Komatsu search formats:

• 23B-15-11172
• 23B1511172

Part name

Public listings identify the item simply as:

• HOUSING

Application category

The part is publicly listed under:

• Transmission and Torq Parts / Transmission and Torque Parts

Confirmed machine type

• Komatsu motor grader
• Publicly verified on GD655

Associated companion number

Several listings group this part with:

• 23B-15-11173

Estimated weight

I did not find a dependable published public catalog weight for this exact part number. Based on the visible casting size, machining area, and the scale typical of grader transmission housings in this class, a realistic estimated product weightis:

• Approx. 28–35 kg

For website use, I would present it as Estimated Weight: 32 kg and keep final shipping weight subject to packing configuration.

Where the 23B-15-11172 HOUSING KOMATSU sits in the assembly

The numbering sequence around this part is revealing. Public listings place 23B-15-11172 near other transmission-family components such as cages, pistons, shafts, gears, and hubs. Nearby parts in the same sequence include 23B-15-11181, 23B-15-11210, and 23B-15-12120/12131, all of which clearly belong to the internal transmission-clutch family. That sequence supports the interpretation that the 23B1511172, 23B-15-11172 HOUSING KOMATSU is one of the structural housings around those internal parts rather than an external cover for unrelated systems.

This also helps explain why the part looks the way it does. The large center opening, the machined seat, and the distributed lug pattern are all typical of a housing that must receive another fitted part concentrically. On a grader transmission, that kind of precision is essential. Internal clutch and shaft assemblies do not tolerate casual alignment. The housing is part of the alignment system.

Buying and installation considerations

When ordering the 23B-15-11172 HOUSING KOMATSU, buyers should confirm three things before release:

1. Machine model and serial number

Even when the model family looks correct, Komatsu often changes internal transmission details across serial breaks. A housing that looks almost identical may differ in bore detail, oil passage arrangement, or companion-part pairing.

2. Old part number on the removed component

The safest path is always to match the actual removed part. This is especially important when two numbers are sold together, as happens here with 23B-15-11172 and 23B-15-11173.

3. Condition of nearby parts

A housing failure or wear issue can be caused by problems elsewhere in the assembly. During overhaul, inspect the mating shaft, cage, seal surfaces, bearing seat, and fastener areas. Replacing only the housing without checking the supported components may leave the real cause untouched.

Why buyers choose 3GEN Export

At 3GEN Export, we supply the 23B1511172, 23B-15-11172 HOUSING KOMATSU as an OEM supplier for heavy machinery spare parts. That matters because grader transmission parts are not impulse buys. Customers ordering this type of housing usually need correct identification, export-ready packing, and fast dispatch for a machine that cannot stay down for long.

We also understand that parts like the 23B-15-11172 HOUSING KOMATSU are often purchased by workshops, fleet owners, international traders, and field maintenance teams who search using many different formats. Some search by exact number, some by dash-free number, some by the machine model, and some by the part name alone. That is why the product page should naturally include 23B-15-11172, 23B1511172, HOUSING KOMATSU, Komatsu GD655 housing, and grader transmission housing language without stuffing the copy unnaturally.

As 3GEN Export, we deliver worldwide in 5 working days, helping customers reduce downtime and source the right heavy equipment parts quickly. For a product like the 23B1511172, 23B-15-11172 HOUSING KOMATSU, speed matters, but accuracy matters even more. A correctly matched housing saves repair time, protects the surrounding transmission assembly, and gives the customer a part they can install with confidence.

Final evaluation

The 23B1511172, 23B-15-11172 HOUSING KOMATSU is a transmission-side grader housing that public sources consistently associate with the Komatsu GD655 and place in the transmission and torque parts family. Public listings also connect it with the paired number 23B-15-11173, while related 23B-15 reverse-clutch catalog fragments on other grader families show the same number appearing as an analog reference inside that broader transmission family.

From both the public references and the uploaded image, this is best understood as a heavy-duty, precision-machined structural housing used to support internal transmission components in a Komatsu grader application. It is the kind of part that protects alignment, stabilizes the assembly, and helps keep the machine’s driveline working the way it should under real field conditions. For buyers searching 23B-15-11172, 23B1511172, or 23B-15-11172 HOUSING KOMATSU, this is a high-value replacement part that deserves careful matching and professional supply support.

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