23A7013120 / 23A-70-13120 ADJUSTER KOMATSU

The 23A7013120 / 23A-70-13120 ADJUSTER KOMATSU is a left-hand support and positioning part used in the blade and circle support system of selected Komatsu motor graders. Public parts sources identify this number as an adjuster, L.H., while seller listings connect it with circle drawbar support, circle reverse, and blade-and-circle-support related sections. That places the part in a working equipment area where strength, accurate fit, and long-term stability matter every day in the field.

From the photos, this component shows a reinforced cast body, a large pivot bore, machined end faces, and a ribbed upper section that gives it a distinctive structural profile. The open triangular frame suggests a design focused on rigidity without unnecessary bulk, which is exactly what buyers expect from a grader support component that must handle vibration, blade reaction forces, and repeated operational stress. That visual design aligns well with its placement in circle support and blade support assemblies on Komatsu graders.

At 3GEN Export, we supply this part as an OEM supplier for customers who need dependable heavy machinery spare parts, export-ready service, and fast logistics. We deliver all over the world in 5 working days, helping workshops, fleet owners, traders, and contractors reduce downtime and keep Komatsu graders working efficiently.

Product Overview

The 23A7013120 / 23A-70-13120 ADJUSTER KOMATSU is commonly sold as a left-hand adjuster for grader applications. Public references from 3GENEXPORT describe it as “ADJUSTER L.H” for Komatsu grader GD655, and 3GENEXPORT listings identify the same number as “ADJUSTER,L.H” with a 27.000 kg reference weight. Additional catalog pages connect the number with circle support and blade support groups on multiple grader models, reinforcing that this is a structural work-equipment part rather than a minor bracket or cosmetic casting.

That matters because a motor grader depends on stable blade support to deliver consistent road shaping, fine leveling, shoulder work, drainage maintenance, and finish grading. A worn or damaged adjuster in this zone can affect the behavior of the support assembly and increase stress on related pins, bores, or connected hardware. In practical maintenance terms, replacing this component is about restoring control and structural confidence in the grader’s working system, not just swapping out a catalog number.

What the Images Reveal

Reinforced Structural Body

The body of the 23A7013120 / 23A-70-13120 ADJUSTER KOMATSU has a heavy cast shape with a triangular braced structure. This type of design is commonly used when a part must resist twisting and vibration while remaining dimensionally stable under field loads. For grader work equipment, that kind of geometry is valuable because the support system experiences constant reaction force during cutting and leveling operations.

Large Pivot Bore

One side of the part includes a prominent circular bore with a machined inner surface. That is a strong sign of a pivot-pin or shaft-based mounting point. When a component sits in a support assembly and pivots under load, bore accuracy becomes very important. Excess looseness can reduce control precision, while poor alignment can create uneven wear in surrounding components.

Machined End Faces and Contact Areas

The visible metallic end zones suggest that the critical seating and mounting surfaces are machined rather than left rough. This helps installation, supports cleaner assembly, and gives the technician more confidence that the part will seat properly once fitted.

Ribbed Upper Section

The ribbed upper portion gives the part a recognizable profile and appears to contribute additional stiffness to the casting. In e-commerce terms, this is also useful because it helps buyers visually compare the listing image with the removed part from their machine.

Application Area

Public references place this number in the blade and circle support area of Komatsu graders. The MTK listing groups it under circle drawbar support and circle reverse for the GD655, while 777parts-based references place it in circle support or blade support pages across several grader families. That consistency across multiple sources is important because it confirms the application zone without relying on guesswork.

This application area is one of the reasons the part has real commercial importance. A grader’s work quality depends heavily on the stability of the blade and circle assembly. Components in this zone help the machine maintain proper geometry while cutting, shaping, and finishing the ground surface. When one of these parts becomes worn, cracked, or dimensionally compromised, the operator may notice reduced precision or more play in the working assembly. Over time, that can affect both finished surface quality and maintenance cost.

Compatible KOMATSU Models

Public fitment references connect this number with a broad range of Komatsu graders. Across seller pages and catalog-style parts listings, the most commonly referenced machines include GD505A-3, GD505A-3A, GD510R-1, GD511A-1, GD521A-1, GD521A-1E, GD523A-1, GD605A-5, GD605A-5S, GD611A-1, GD621A-1, GD621R-1, GD623A-1, GD655, GD661A-1, and GD663A-2. Some 777parts pages also show serial-based references such as GD505A-3 S/N 1001-UP and GD505A-3A S/N 2001-UP in circle support sections.

For website presentation, the compatible models can be shown like this:

GD505A-3
GD505A-3A
GD510R-1
GD511A-1
GD521A-1
GD521A-1E
GD523A-1
GD605A-5
GD605A-5S
GD611A-1
GD621A-1
GD621R-1
GD623A-1
GD655
GD661A-1
GD663A-2

Because aftermarket fitment pages do not always display the same serial-break details, the safest purchasing method is still to verify the full machine model and serial number before final order confirmation. That is especially important with grader work-equipment parts, where regional configuration and serial changes can matter.

Weight and Technical Reference

Published weight information for this number is relatively consistent. A 777parts-based listing shows the reference weight as 27.000 kg, and UCASLAR also lists 23A-70-13120 at 27 KG. Based on those matching public references, the clearest commercial statement is: approximate weight 27 kg. That figure is practical for freight planning, warehouse handling, and customer expectations, even though packed shipping weight may vary slightly with packaging method.

This weight also supports what the images already suggest. The 23A7013120 / 23A-70-13120 ADJUSTER KOMATSU is not a light linkage or thin lever. It is a substantial structural component built for serious service in the grader support assembly.

Technical Details

Part number

23A7013120

Alternative format

23A-70-13120

Product description in public listings

Adjuster, L.H. / Adjuster L.H.

Application group

Blade and circle support, circle support, circle drawbar support, and circle reverse related grader assemblies.

Approximate weight

27 kg.

Why This Part Matters in Daily Operation

A grader is only as precise as the stability of its working assembly. When the left-hand adjuster in the blade and circle support system starts to wear, the machine can lose some of the consistency needed for accurate grading. That may show up as unwanted movement, increased wear in nearby support points, or a less predictable feel during cutting and finishing work.

That is why buyers usually search for 23A7013120 or 23A-70-13120 with a clear repair objective. They may be rebuilding a circle support assembly, correcting looseness in the blade system, or replacing a worn left-hand unit after long service. In each of those cases, the priority is dependable fit and structural quality.

Benefits of a Good Replacement

Better fit during assembly

A well-made replacement supports more predictable installation because the bore, mounting areas, and contact faces are less likely to need correction during fitting.

More stable blade support

Since the part works in a support assembly, rigidity and dimensional stability directly affect how the surrounding system behaves under working load.

Lower risk of secondary wear

When the adjuster seats correctly and aligns as intended, nearby pins, bores, and related support parts are less likely to experience unnecessary stress.

Strong search value for e-commerce

This part number performs well online because buyers search it in several ways: by continuous number, hyphenated number, left-hand adjuster wording, and grader model references. A well-optimized page can capture all of those search patterns without sounding unnatural.

Installation Guidance

Before installing the 23A7013120 / 23A-70-13120 ADJUSTER KOMATSU, verify the machine model, serial number, and left-hand orientation. Public listings consistently identify it as the left-hand version, so side confirmation should be part of the purchasing and service process.

During installation, inspect the pivot bore, the pin area, the end faces, and the surrounding support hardware for wear, scoring, looseness, or distortion. If the connected parts are already damaged, a new adjuster alone may not fully restore the assembly. After installation, an early reinspection is good practice to make sure the part has seated correctly and that no abnormal movement is developing.

Why Buy from 3GEN Export

At 3GEN Export, we understand that customers sourcing this type of grader part are usually dealing with active downtime. A machine waiting for a support component can slow roadwork, municipal maintenance, quarry operations, and site preparation schedules.

That is why we supply this part as an OEM supplier and deliver all over the world in 5 working days. Our focus is straightforward: clear identification, dependable export handling, and fast supply for heavy machinery spare parts.

Final Summary

The 23A7013120 / 23A-70-13120 ADJUSTER KOMATSU is a left-hand support component used in blade and circle support related assemblies on selected Komatsu graders. Public sources connect it with models such as GD505A-3, GD505A-3A, GD510R-1, GD511A-1, GD521A-1, GD521A-1E, GD523A-1, GD605A-5, GD605A-5S, GD611A-1, GD621A-1, GD621R-1, GD623A-1, GD655, GD661A-1, and GD663A-2, while published weight references place it at about 27 kg.

From the supplied images, the part shows the reinforced casting, pivot design, and machined support surfaces expected from a serious grader work-equipment component. As 3GEN Export, we supply this product as an OEM supplier and deliver all over the world in 5 working days.

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.