Komatsu PC12 Avance R Tracks: The Ultimate 2026 Buyer’s Guide and Maintenance Manual

Two Komatsu PC12 Avance R machines bought the same year can go through tracks at very different rates, and the difference is rarely the brand of track. It is the ground: one works lawn and paving, the other crosses broken concrete and demolition debris weekly. Choosing a track is a decision about the work, and the buying exercise only makes sense once that is settled - the photograph on the product page tells you almost nothing about whether the belt will survive on your site.

Last updated: October 5, 2026

This guide covers how to confirm the size for your machine, how the rubber compound and cord reinforcement change the life you get, how to match the track to conditions, and the maintenance routine that decides whether a set reaches its design life.

Confirm the size before you compare anything

Every track is defined by three numbers: width in millimetres, pitch between link centres, and link count. The pitch has to match the drive sprocket and cannot be adjusted; the link count is the belt's length, and a belt one link out will not tension correctly. Take all three from the marking on the track you are removing - it is moulded into the belt - then confirm them against the machine's manual and its serial number.

A listing that names the machine but not the size is a starting point for a conversation, not an order. This is also where the cross-reference matters: the part number has to be checked against your serial number, because undercarriage specification changes across build series and the same model name can cover more than one belt.

What actually decides how long a track lasts

Two things inside the belt, and one thing you do to it afterwards.

The compound. Abrasion resistance and cold flexibility pull in opposite directions. A compound built for abrasive ground holds its lug shape under broken rock and demolition debris; a softer, grippier blend performs better on wet turf and marks pavement less, and wears faster where the ground is sharp. Ask for the purpose of the compound and its published temperature band rather than assuming - and in Canada the temperature band is a specification, not a detail.

The steel cord. This is what keeps the belt from stretching out of pitch under load. Ask for the cord type and the number of inserts, and ask what stops the joint failing - a vulcanised joint is a process, and processes get rushed under price pressure.

Tension. A track run loose slaps against the frame, rides the sprocket and can de-track; a track run tight loads the idler, rollers and bearings. The figure belongs in the operator's manual, and the measurement is taken at a defined point between sprocket and idler with the machine lifted. Check both sides, because the two tracks rarely wear at the same rate.

Matching the track to the job

Three site types cover most of what these machines do, and each one points at a different specification.

Landscaping, turf and finished surfaces. Here the priority is the ground rather than the belt: a smoother profile with moderate lug depth, and a compound that grips wet grass without tearing it. Where the machine crosses driveways as well as lawns, heat on hard surfaces becomes the limiting factor rather than abrasion.

Utility and trenching work. Mixed ground - gravel, spoil, broken pavement - wants a multi-purpose pattern with enough reinforcement to survive the occasional sharp edge. This is the specification most machines in this class are actually working to.

Forestry and abrasive ground. Sharp debris and rock cut rubber, which is why this work justifies a heavier build with a deeper tread and reinforced cord. On this ground a standard belt reaches its cord long before its lugs are worn, and the money saved on the cheaper belt is spent on the next set.

Where the machine works several of those, the sensible compromise is the multi-purpose pattern - not the most aggressive belt available, which will mark every finished surface it crosses. The parts around the belt follow the same logic: on a machine doing any abrasive work, sprockets, rollers and idlers wear together, and the same catalogue lists them by part number and machine, including items like this track roller 207-30-00150 for Komatsu machines.

The maintenance routine

Rubber tracks rarely fail from age. They fail from tension, cuts and contamination, and the routine that prevents all three is short.

Clean the undercarriage after abrasive or muddy work, because packed material grinds between belt and frame and grit trapped in the tread cuts rubber from the inside. Check tension on the schedule the manual gives rather than when the machine looks wrong, and re-check it after the first weeks of a new set: a belt stretches while it beds in. Inspect for cuts, missing lugs and exposed cord at the same time, and look at the rollers, idler and sprocket - a woven roller seal or hooked sprocket tooth is the cheapest repair you will ever make. And avoid pivoting on abrasive surfaces, which scrubs the lugs off one side faster than travelling ever does.

Where a replacement turns into more than one part, it is worth comparing what a kit covers against buying the components individually; the same question comes up on this class of machine whether you are dealing with an idler for a Komatsu PC300 or a track for a mini excavator. The full range of belts, by size and machine, is in the rubber track collection.

Knowing when to stop is the other half of maintenance. A belt is finished when the cord is exposed, when lugs are torn away to the carcass, or when cracks run from the shoulder inward - not when it merely looks worn. A belt that is due for replacement but still intact is worth keeping as a spare if it holds tension, which turns a mid-season failure into a morning's work instead of a week's wait.

And a belt that fails early is worth diagnosing rather than simply replacing. Cut cord points at sharp debris and the wrong tread choice; a shredded shoulder points at alignment; a belt that wore out evenly across its lugs, ahead of schedule, usually points at tension. Each of those has a fix that costs less than the next set.

This article is part of the rubber tracks guide, which covers how the size code works, tread patterns, compounds and buying a set in Canada.

FAQs

How do I know which tracks fit my Komatsu PC12 Avance R?

Read the width, pitch and link count from the track you are removing, confirm them against the machine's manual, and have the part number cross-referenced against your model and serial number before ordering.

How often should track tension be checked?

On the interval in the machine's manual, plus a re-check in the first weeks after a new set is fitted while the belt beds in. Measure it where the manual specifies, with the machine lifted, and check both sides.

What is the difference between a standard and a heavy-duty track?

Reinforcement and tread depth: a heavy-duty belt uses more cord and a deeper tread for abrasive, sharp ground, while a standard belt suits turf, pavement and mixed sites. Buying the heavier build for finished surfaces is money you never wear back.

Can I use tracks from another machine on the same undercarriage?

Only if width, pitch and link count all match. Sharing a width or a pitch is not enough - the belt has to fit the sprocket and tension correctly on your undercarriage.

Should both tracks be replaced at once?

If both have done the same hours on the same ground, yes; otherwise the machine steers against the older belt and wears the new one faster. A single replacement is reasonable when one belt has been damaged early on an otherwise sound set.