23B2321170, 23B-23-21170 SPACER KOMATSU

Product Overview

The 23B2321170, 23B-23-21170 SPACER KOMATSU is a drivetrain spacing component used in the rear axle / tandem drive planetary assembly of selected Komatsu motor graders. Public parts references consistently identify this part as SPACER and place it in tandem-drive-related axle groups, including front planetary / no differential and rear planetary / differential lock type catalog sections depending on model and serial range.

For search performance on your website, it is important to include both number formats: 23B2321170 and 23B-23-21170. Buyers often search one version from ERP records and the other from parts books or labels. At 3GEN Export, we supply the 23B2321170, 23B-23-21170 SPACER KOMATSU as an OEM supplier part with worldwide delivery in 5 working days. The application information below is based on public parts-catalog references and should be verified against machine serial number before order confirmation.

What Is 23B2321170, 23B-23-21170 SPACER KOMATSU?

A spacer in a tandem-drive or rear axle planetary system is a precision-machined component used to maintain correct axial position, controlled clearance, and proper load distribution between adjacent rotating and stationary parts. In grader drivetrain assemblies, even a relatively simple-looking spacer can play a major role in preserving alignment, supporting bearing location strategy, and protecting neighboring parts from uneven wear.

Public listings for 23B-23-21170 show that Komatsu classifies it as a Spacer and uses it in tandem drive and rear axle sections. One catalog listing places it in REAR AXLE (TANDEM DRIVE) (FRONT PLANETARY) (NO DIFFERENTIAL), while other diagrams place it in rear planetary or A drive / B drive tandem configurations depending on the machine and serial range. That tells us this is not just a general-purpose washer-like item, but a dedicated drivetrain positioning component.

the 23B2321170, 23B-23-21170 SPACER KOMATSU appears as a heavy-duty precision ring spacer with a broad outer face, machined inner bore, and consistent section thickness. Its form strongly suggests use in controlled axial spacing where durability, flatness, and dimensional stability are essential.

Why This Spacer Matters in a Komatsu Drivetrain

In heavy machinery, spacers are often underestimated because they do not look as complex as gears, shafts, or housings. In reality, the correct spacer protects the geometry of the whole assembly. A poor-quality or incorrectly sized spacer can change preload, alter running clearance, affect alignment, and eventually shorten the life of bearings, gears, seals, or planetary components.

Because the 23B2321170, 23B-23-21170 SPACER KOMATSU is listed in tandem-drive planetary axle sections, it should be treated as a precision support part rather than a generic ring. In real operating conditions, Komatsu graders work under shock loads, uneven terrain, long duty cycles, and repetitive torque changes. Under those conditions, the spacer’s job is to help preserve the exact relationship between connected drivetrain parts so the complete assembly can run smoothly.

That is why professional buyers, fleet maintenance teams, and rebuild shops typically prefer using the exact part number when sourcing a spacer. Small dimensional differences in thickness, bore tolerance, or face finish can lead to problems that are much more expensive than the cost of the part itself.

Confirmed KOMATSU Model References

Public fitment sources connect 23B2321170, 23B-23-21170 SPACER KOMATSU to several Komatsu grader families. One broad catalog source lists the following models among the machines comprising this spacer:

Publicly referenced Komatsu models

• GD555-3A
• GD555-3C
• GD621A-1
• GD621R-1
• GD623A-1
• GD625A-1
• GD625A-1C
• GD655-3A
• additional GD-series applications are also indicated in public parts sources.

Additional public references specifically confirm applications in:

• GD655-3C S/N 50001-UP
• GD655-3E0 S/N 51501-UP
• GC380F-1 / GC380F-1A
• GD675 family references in public catalog listings.

Because public sources show the part in different tandem-drive sections depending on serial range and configuration, the safest commercial fitment statement is this:

Best-practice fitment note

The 23B2321170, 23B-23-21170 SPACER KOMATSU is used in selected Komatsu grader and tandem-drive axle applications, especially within the GD555 / GD655 / GD675 / GD621 / GD623 / GD625 / GC380F machine families, but final compatibility must be verified by exact machine model and serial number before purchase.

Visual Inspection

Precision-machined ring profile

The part has a clean circular profile with flat parallel faces, which is typical of a component intended to maintain exact axial spacing inside a mechanical assembly.

Broad contact face

The wide outer face suggests stable seating against an adjacent component such as a bearing-related surface, housing shoulder, or planetary assembly element.

Machined inner bore

The central opening appears carefully machined rather than roughly cast, indicating that fit tolerance is important for its function.

Heavy-duty section thickness

This is not a thin shim-style spacer. The thickness and mass suggest a substantial positioning role inside a loaded drivetrain environment.

Function of a Spacer in Tandem Drive and Planetary Systems

In motor grader rear axle systems, tandem drives and planetary components must remain in exact positional relationship to one another. A spacer helps maintain that geometry. Depending on assembly design, it may contribute to:

Axial spacing

It preserves a designed gap or installed position between rotating or stationary components.

Bearing location support

It may help determine where a bearing or adjacent part sits within the assembly stack.

Load path stability

By maintaining face contact and alignment, it supports even load transfer through the drivetrain.

Wear control

Correct spacing helps reduce side loading, edge contact, and abnormal friction on neighboring parts.

Assembly repeatability

During rebuilds and service work, the correct spacer ensures the drivetrain returns to intended specification.

That is why a correctly matched 23B2321170, 23B-23-21170 SPACER KOMATSU matters even though its geometry seems simple at first glance.

Benefits of Choosing 3GEN Export

When buyers search for 23B2321170, 23B-23-21170, or Spacer Komatsu, they are usually trying to solve one of two problems: a planned rebuild or urgent machine downtime. In both cases, supply reliability matters as much as technical accuracy.

At 3GEN Export, we position the 23B2321170, 23B-23-21170 SPACER KOMATSU as an OEM supplier product for professional aftermarket sourcing. Our focus is not only on part identification but also on fast logistics, responsive support, and international delivery performance. For this part, as with other Komatsu heavy machinery spare parts, we support worldwide delivery in 5 working days.

That matters especially for fleets, workshops, and traders who need to keep graders moving in road work, mining support, land development, and site maintenance operations. A delayed small component can hold up an entire tandem-drive rebuild. Fast dispatch helps prevent that.

Technical Details

Product Name

23B2321170, 23B-23-21170 SPACER KOMATSU

Alternative Search Format

23B2321170

Catalog Format

23B-23-21170

Part Type

Spacer

Main Assembly Area

Rear axle / tandem drive / planetary-related drivetrain sections

Known Catalog Section Examples

• Rear axle (tandem drive) front planetary, no differential
• Rear axle (tandem drive) rear planetary, differential lock type
• Tandem drive gear and chain
• Rear axle tandem A drive / B drive depending on serial range

Weight

A public catalog listing gives the weight of 23B-23-21170 as 2.440 kg. Another seller listing shows a packaged weight of 6 lb / 2.73 kg, which likely reflects shipping or catalog variation rather than the exact bare-part mass. For product-page accuracy, the best supported bare-part reference is 2.440 kg, while noting that marketplace shipping weights may differ.

Technical Specifications

Because public catalog sources identify the part and its assembly group but do not publish a full engineering datasheet, the following are careful, non-overstated website-ready specification points:

Material

High-strength machined metal construction, suitable for drivetrain spacing applications.

Finish

Machined metallic surface finish.

Shape

Heavy-duty circular spacer ring.

Application

Rear axle and tandem-drive planetary positioning in selected Komatsu graders.

Installation Role

Maintains axial spacing and component alignment within drivetrain assemblies.

These points are based on visible product geometry and public catalog placement, not on a factory manufacturing certificate.

Product Description

The 23B2321170, 23B-23-21170 SPACER KOMATSU is a heavy-duty drivetrain spacer designed for selected Komatsu grader rear axle and tandem-drive applications. Public parts catalogs identify it as a Spacer and place it in planetary and tandem-drive assembly groups used on machines such as GD555, GD655, GD675, GD621, GD623, GD625, and GC380F series depending on model and serial range.

Manufactured as a precision ring-type component, the 23B2321170, 23B-23-21170 SPACER KOMATSU helps preserve correct axial location, stable assembly geometry, and dependable running clearance inside demanding grader drivetrain systems. Even though it is visually simple, this spacer supports the accuracy of the entire axle and tandem-drive arrangement, making it an important replacement part during transmission and axle service work.

At 3GEN Export, we supply the 23B2321170, 23B-23-21170 SPACER KOMATSU as an OEM supplier product for professional buyers who need reliable sourcing and fast logistics. We deliver worldwide in 5 working days, helping maintenance teams, resellers, and fleet operators reduce downtime and keep critical Komatsu equipment working.

Why Buyers Search This Part by Number

Many parts buyers do not search by description first. They search by number. That is why your product page should repeat the exact number naturally throughout the content:

• 23B2321170
• 23B-23-21170
• Spacer Komatsu
• Komatsu tandem drive spacer
• Komatsu rear axle spacer

Using both part-number versions improves visibility for international buyers, older catalog users, and B2B procurement teams.

Installation and Ordering Advice

Before purchasing the 23B2321170, 23B-23-21170 SPACER KOMATSU, confirm:

Machine model

The same part family can appear across multiple Komatsu grader ranges.

Serial number

Public catalog references show serial-specific applications. This is essential.

Assembly section

Check whether the machine uses the spacer in front planetary, rear planetary, A drive, B drive, or differential-lock-related tandem-drive configuration.

Adjacent parts

When replacing a spacer, many buyers also inspect nearby O-rings, shafts, chains, drums, bearings, or planetary components in the same assembly. Public diagrams show 23B-23-21180 O-RING and related tandem-drive parts near this spacer in several applications.

The 23B2321170, 23B-23-21170 SPACER KOMATSU is a precision drivetrain spacer used in selected Komatsu rear axle and tandem-drive planetary assemblies. Public parts references connect it with multiple Komatsu grader families, including GD555, GD655, GD675, GD621, GD623, GD625, and GC380F, with application depending on exact serial range and tandem-drive configuration. A public catalog reference lists its weight as 2.440 kg, making it a substantial spacer rather than a light shim-type component.

For buyers searching 23B2321170, 23B-23-21170, or Spacer Komatsu, 3GEN Export supplies this part as an OEM supplier solution with worldwide delivery in 5 working days. For best ordering accuracy, always confirm the machine model and serial number before shipment.

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.

Frequently Asked Questions

What is the function of the 23B-23-21170 spacer?

The 23B-23-21170 spacer maintains precise axial spacing between components in Komatsu grader drivetrain assemblies. It ensures correct bearing preload, gear mesh alignment, and load distribution within tandem drive and planetary gear systems.

Which Komatsu grader models use the 23B2321170 spacer?

Public catalog references associate the 23B2321170 spacer with GD555, GD655, GD675, GD621, GD623, GD625, and GC380F Komatsu grader families. Exact compatibility depends on the machine serial number and assembly configuration.

Can I reuse the old spacer during a rebuild?

Spacers should be inspected for surface wear, dimensional changes, and deformation during every rebuild. If the spacer shows pitting, uneven wear, or thickness outside tolerance, it should be replaced with a new 23B-23-21170 to restore correct drivetrain geometry.

How quickly can you ship the 23B2321170 spacer?

3GEN Export delivers worldwide in 5 working days. For urgent machine-down situations, contact us at info@3genexport.com or +1 (912) 933-5858 to discuss expedited shipping options.

Do you provide cross-reference verification for this part?

Yes. Our parts team offers free cross-reference verification. Send us your machine model, serial number, and the part number you are looking for, and we will confirm whether the 23B-23-21170 spacer is the correct match.

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