In short: Excavator undercarriage cost is one of the biggest hidden running bills you will face. A full replacement of tracks, rollers, idlers and sprockets on a 20-ton machine runs an indicative ₹3-6 Lakh (as of Jul 2026), typically due somewhere around 4,000-5,000 hours — sooner on rocky or abrasive ground. It builds up quietly and then lands all at once, so the owners who plan for it, and who operate to make tracks last, keep the bill down.

Ask an owner what their excavator costs to run and they will mention fuel and diesel and maybe the operator. Few think about the undercarriage until the day it is worn out and the quote lands. Yet on a tracked machine it is one of the largest maintenance costs over the life of the machine, and unlike fuel it arrives as a single big bill rather than a steady trickle. This piece explains what the undercarriage costs, what wears it out, and how to stretch its life — the third big lever, after fuel and downtime, in the real cost of owning an excavator.

What the undercarriage is — and why it wears

The undercarriage is everything the machine runs on: the track chains and shoes, the rollers that carry the weight, the idlers that guide the track, and the sprockets that drive it. All of it takes constant abrasion and carries the full weight of the machine, so it wears steadily every hour the machine moves. The rate of wear depends heavily on the ground: soft soil is kind, while rock, sand, slag and demolition debris chew through tracks fast.

Excavator undercarriage cost: the indicative numbers

Here is a rough indicative picture for a 20-ton class machine. Individual parts wear at different rates, so you often replace them in stages rather than all together, which spreads the spend.

Component Job it does Indicative cost (20-ton, Jul 2026)
Track chains + shoes (pair) What the machine runs on ₹1.5-3 Lakh
Rollers (track + carrier) Carry the weight ₹60,000-1.5 Lakh
Idlers (pair) Guide the track ₹40,000-90,000
Sprockets (pair) Drive the track ₹30,000-80,000
Full undercarriage Everything, replaced together ₹3-6 Lakh

Because these parts are large and take heavy abuse, quality matters. Genuine OEM parts cost more but are matched to the machine; good aftermarket parts from an established manufacturer can be sound value, especially on an older machine. The trap is the cheapest generic part, which wears fast or damages what it runs against — the same false economy we describe in our note on avoiding fake excavator parts.

Undercarriage is a specialist field with a handful of well-known names. Beyond the machine makers’ own genuine parts from the likes of Caterpillar and Komatsu, the big aftermarket undercarriage brands include Berco and ITR, both sold widely in India, alongside manufacturers such as Dozco, which makes undercarriage parts, pins and bushes across its Indian and international operations. Compare them on fit, material quality, warranty and parts support rather than price alone — a cheap, low-grade part wears fast or damages what it runs against.

How to make it last longer

The undercarriage bill is one of the most controllable running costs, because operating habits change its life more than almost anything else:

  • Keep track tension correct. Too tight wears everything faster; too loose lets the track slip and jump. Check it on the ground you actually work.
  • Clean out packed mud daily. Mud and debris packed into the running gear grind it down and force components out of line.
  • Avoid needless sharp turns and side-slopes. Counter-rotating and travelling across slopes puts heavy side-load on tracks and rollers.
  • Match the shoe to the ground. Wider shoes for soft ground, narrower for rock — the wrong choice wears fast.
  • Inspect regularly. Catching one worn part early stops it damaging the others and turning a small job into a full replacement.

These habits cost nothing and can push a major undercarriage job thousands of hours further out. On a machine you rely on daily, that deferral is real money — and real uptime, since the cost of the parts is only half the pain. The other half is the downtime while the work is done.

The bottom line

The undercarriage is the running cost owners forget until it is too late. Budget for it, watch for wear, operate to protect it, and buy quality parts from a supplier who stands behind them, and you turn a nasty surprise into a planned expense. When you are weighing a machine or a used purchase, factor undercarriage condition into the price — it is one of the first things to check. It sits alongside routine servicing in the wider excavator maintenance cost, which is worth budgeting the same way. See the full ownership picture in our guide to the cost of owning an excavator, and compare machines and their running gear across the excavator range before you decide.

Undercarriage prices, wear life and specifications are indicative, vary widely by machine, ground conditions, part make and date, and should be confirmed with the OEM, manufacturer or authorised dealer before any purchase. DesiMachines is not liable for decisions taken on information that may have changed after publication.