Komatsu Rubber Track Specifications by Model
The PC series has been produced across multiple generations, export markets, and undercarriage configurations and the rubber track specification is not consistent across model names alone. The table below covers the most frequently ordered Komatsu rubber track specifications. All must be confirmed against your machine serial number before ordering.
Komatsu Mini & Compact Excavator Track Specifications
The Komatsu PC15 and PC18 mini excavators typically use a 180 × 72 × 37 rubber track configuration. As with most smaller machines, there can be width variations depending on the production batch, so it’s important to confirm the serial number before ordering.
For the Komatsu PC20 and PC26 mini excavators, the standard track size is 230 × 48 × 66. This specification remains consistent across most production years, making it one of the more straightforward fits.
The Komatsu PC35 and PC40 models are commonly fitted with 300 × 52.5 × 84 tracks. However, these machines were manufactured with multiple undercarriage configurations, so confirming the serial number is essential to ensure compatibility.
Komatsu PC50 and PC55 mini excavators typically use 400 × 72.5 × 72 rubber tracks. Width variations exist across different production years, so it’s recommended to verify the exact specification before purchase.
For the larger Komatsu PC78 compact excavator, the standard track size is 450 × 81 × 76. Regional production differences can affect the specification slightly, so confirming the serial number is important when selecting the correct track.
All specifications must be confirmed against your machine serial number. The PC35 and PC50 ranges in particular carry multiple undercarriage configurations across production years and export markets Komatsu excavator undercarriage parts for these models cannot be reliably specified from model name alone.
Warning Signs, When Your Komatsu Rubber Tracks Need Replacing
Komatsu's tight PC series undercarriage tolerances mean a worn rubber track distributes abnormal stress across the full Komatsu undercarriage system faster than on less precisely engineered machines. Replace your Komatsu rubber tracks if you are seeing any of the following:
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Tracks derailing on turns or slopes — steel core stretch beyond what the Komatsu track adjuster can compensate for. This is a replacement situation, not a tensioning one.
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Steel cord visible at the outer or inner track surface — full compound wear-through. Every operating hour from this point risks sudden separation without warning.
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Cracking across or between lugs — compound hardening from UV exposure, over-tensioning, or age. Surface cracks propagate under operating load on a Komatsu undercarriage system faster than on machines with looser tolerances.
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Uneven lug wear across the track width — the Komatsu rubber track is running off-centre. Inspect PC series idler alignment and track adjuster condition alongside the replacement — the root cause must be resolved.
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Drive lug damage on the inner track surface — abnormal Komatsu sprocket contact shearing material from the drive lugs. Inspect Komatsu sprocket tooth profile before fitting a new track.
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Track adjuster at maximum extension — the PC series track has stretched beyond the adjuster's travel range. Replace immediately.
Why Komatsu PC Series Track Specification Cannot Be Ordered by Model Name Alone
The PC35 and PC50 ranges are the two models where this issue occurs most consistently and where the consequences of ordering without serial number verification are most expensive.
The Komatsu PC35 has been in continuous production long enough to carry multiple distinct undercarriage specifications across its production history. Track width, pitch, and in some cases link count differ between production generations and regional export specifications. A PC35 built for the Australian market in 2012 may carry a different rubber track specification from a PC35 built for the European market in 2019 despite sharing the same model designation.
The PC50 carries the same production variant risk. Multiple track width configurations exist across the PC50 production history depending on year of manufacture and regional specification.
At Imara Engineering, every Komatsu rubber track order for the PC35 and PC50 ranges is processed against the machine serial number, not the model name. This is not bureaucracy. It is the step that prevents the wrong track arriving on your site when your machine is already standing idle. Provide your PC series serial number, existing track markings if available, and we confirm the exact Komatsu excavator undercarriage parts specification before your order is placed.
OEM Quality. Komatsu Specification. Without the Dealer Premium.
Every Komatsu rubber track supplied by Imara Engineering is manufactured to three engineering standards confirmed against the Komatsu OEM specification for each PC series model before the track enters our inventory:
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Continuous spiral-wound steel cord core — rated to Komatsu's published tensile specification for each PC series model. Under-rated cord stretches faster, loses tension earlier, and causes the premature derailing that Komatsu's precision undercarriage geometry makes worse than on less tightly toleranced machines.
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High-carbon rubber compound — formulated for cut resistance against the sharp aggregate and concrete surfaces PC series excavators regularly encounter in construction and civil applications, abrasion tolerance on rocky terrain, and UV stability for machines operating outdoors year-round in variable climates.
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OEM-matched pitch and lug geometry — dimensionally accurate to Komatsu PC series specification so the track engages the Komatsu sprocket tooth profile and idler wheel correctly from the first operating hour, without abnormal stress on any surrounding Komatsu undercarriage part.
OEM Komatsu rubber tracks carry a brand premium above equivalent quality aftermarket specification. At Imara Engineering, the steel cord rating, compound specification, pitch accuracy, and fitment guarantee replicate the Komatsu dealer standard. The premium does not.
What to Inspect Before Fitting New Komatsu Rubber Tracks
Komatsu's precise PC series undercarriage geometry means that worn surrounding components damage a new rubber track faster than on machines with looser tolerances. Inspect these components before fitting new Komatsu excavator tracks:
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Komatsu Sprockets — hook wear or pointed tooth profile will shear drive lugs from the new track's inner surface within a fraction of its expected service life. The Komatsu PC series sprocket tooth profile is matched precisely to the rubber track pitch; any deviation from the OEM profile destroys the new track from the first operating hour.
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Komatsu Idler Wheels — a worn PC series idler flange causes the new track to run off-centre immediately, reproducing the uneven lug wear pattern that was present on the replaced track.
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Komatsu Track Adjusters — a worn or leaking PC series track adjuster cannot maintain correct tension from day one of the new track installation. Confirm adjuster conditions before the new track is fitted.
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Komatsu Track Rollers — a seized bottom roller creates a point load on the rubber track inner surface. Inspect all PC series rollers before fitting new tracks.
Explore the complete Undercarriage Parts range at Imara Engineering, including Komatsu track rollers, Komatsu idler wheels, Komatsu sprockets, and Komatsu track adjusters.
