Excavator Undercarriage Parts List: Complete Buyer’s Guide

Excavator Undercarriage Parts List: Complete Guide for Buyers and Operators

Why you searched for “excavator undercarriage parts list”

When users search for the keyword excavator undercarriage parts list, they typically want a clear inventory of undercarriage components, help identifying worn parts, compatibility guidance by brand/model, and purchasing options (OEM vs aftermarket). This guide gives a practical, commercial-intent overview so you can identify, buy, and maintain the parts you need to keep tracked excavators working reliably.

What is included in a typical excavator undercarriage parts list

An excavator undercarriage parts list covers all components that support mobility and ground contact: track chains and links, sprockets, idlers, rollers (top/carrier and bottom/track rollers), track shoes (grousers), pins and bushings, track adjusters and tensioners, final drives/travel motors, seals, bolts, and sometimes the track frame assembly. For mini excavators you’ll also see rubber tracks, pads, and unique tensioning kits. This list helps maintenance teams and procurement specialists pinpoint items for repair or replacement.

Track chain and track link assembly — core items on your excavator undercarriage parts list

Track chains and link assemblies are the backbone of the undercarriage. They transmit machine weight and motion, and their wearing directly affects performance. Commonly replaced items in this category include chain links, master links, guide plates, and link guards. When shopping, match pitch, link width, and part numbers to the make and model — e.g., Komatsu, Caterpillar, Volvo — to ensure proper fit.

Sprockets — check teeth profile and part fitment

Sprockets engage the track chain; worn teeth accelerate chain wear and slippage. Sprocket replacement is a frequent entry on an excavator undercarriage parts list because tooth shape changes over time. Look for matching bolt patterns and tooth profiles. Sprockets are available in OEM and aftermarket grades — higher-quality sprockets will extend the life of new or reconditioned chains.

Idlers and idler assemblies — tension, support, and alignment components

The idler controls forward tension and helps guide the track. Idler assemblies include the idler wheel, shaft, seals, and sometimes an arm or carrier. Damaged idler faces or seals can cause oil leaks in hydraulic adjusters and accelerate chain wear. Ensure replacement idlers match the machine’s size class and hydraulic or mechanical adjuster type.

Bottom (track) rollers — load-bearing rollers in the excavator undercarriage parts list

Bottom or track rollers support the machine’s weight on the track chain. These rollers contain bearings and seals that wear from impact and contamination. Replace rollers showing flat spots, leaking seals, or excessive play. For many machines, bottom rollers are a recurring part of maintenance budgets and should be inspected at regular service intervals.

Carrier (top) rollers — maintain track alignment and reduce wear

Carrier rollers (top rollers) keep the upper run of the track chain stable. While lighter-loaded than bottom rollers, failing carrier rollers can lead to track derailment and uneven wear on other items in your excavator undercarriage parts list. Replace top rollers if bearings are noisy, seals leak, or roller faces show heavy wear.

Track shoes (grouser plates) and pads — match ground conditions

Track shoes (grousers) are the replaceable plates bolted to the track chain that provide traction. Choose heavy-duty steel shoes for rock and demolition, and rubber pads for asphalt and finished surfaces. Pads and shoes are a common item in procurement lists; selecting the correct style reduces slippage and extends the life of the entire undercarriage.

Pins, bushings, seals, and bolt kits — wear items on every parts list

Pins and bushings wear together and cause track elongation; seals prevent lubricant loss from rollers, idlers, and final drives. Bolt kits and seal kits are regularly purchased because failures in these small components can cascade into larger repairs. When ordering, use measured dimensions or OEM part numbers to avoid mismatches.

Track adjusters and tensioners — essential for proper track tension

Track adjusters (mechanical or hydraulic) maintain correct track tension. Incorrect tension speeds up wear on chains, sprockets, and rollers. Replace leaking hydraulic tensioners and damaged mechanical adjusters as soon as possible. Include the adjuster assembly and related seals on any excavator undercarriage parts list for rebuilds.

Final drives and travel motors — expensive but critical components

Final drives or travel motors convert hydraulic power into track motion and are among the costliest entries on an undercarriage parts list. Symptoms of final drive issues include slow travel, unusual noise, and oil contamination. Options include new OEM units, remanufactured drives, or high-quality aftermarket alternatives — all of which Kyotechs supplies alongside matching gasket and seal kits.

Track frames, link assemblies, and structural components

Track frames and major link assemblies are less frequently replaced but are required after collisions or severe wear. These components are heavier and more costly to ship and install. When included in an excavator undercarriage parts list, confirm frame serial numbers and check alignment tolerances to prevent premature component failures.

Rubber tracks and mini excavator specific parts

Mini excavators commonly use rubber tracks, which are listed separately on undercarriage parts lists. Rubber tracks, sprockets designed for rubber, and special carrier rollers prolong life when used on city jobs or landscaping. Rubber pads and track fasteners are also regular consumables for compact equipment.

How to choose between OEM and aftermarket undercarriage parts

Choosing OEM vs aftermarket depends on budget, downtime tolerance, and desired lifespan. OEM parts typically guarantee fit and warranty but cost more. High-quality aftermarket parts — often available from suppliers like Kyotechs — can offer comparable performance at lower cost. For critical components (final drives, track frames), many operators prefer OEM or remanufactured units; for shoes, pins, and seals, aftermarket often makes sense.

Matching parts to excavator make and model — avoid costly mistakes

Undercarriage parts are make/model/serial specific. Use your machine’s serial number, model plate, or existing part numbers to ensure compatibility. Many suppliers (including Kyotechs) can cross-reference part numbers across brands like Komatsu, Caterpillar, Hitachi, Volvo, Hyundai, Doosan, Sany, Kawasaki, Case, and Kobelco to provide correct entries for your excavator undercarriage parts list.

Wear indicators and when to replace undercarriage parts

Look for these practical signs: excessive track elongation (measurable pitch change), sprocket teeth hooked or thinned, roller flat spots, oil leaks from rollers or final drives, and visible bushing wear. Replacement intervals vary widely with application — from heavy-rock work to light landscaping — but routine inspections every 250–500 operating hours will help spot problems before they become catastrophic.

Maintenance tips to extend the life of undercarriage components

Simple maintenance extends component life: keep tracks clean of packed debris, maintain recommended track tension, avoid excessive side-sloping, rotate or flip shoes when applicable, inspect seals and bolts at service intervals, and use correct lubrication schedules. Proper operator training also reduces shock loads that accelerate wear.

Typical costs and budgeting for undercarriage repairs and replacements

Costs vary by machine size and part type. Consumer guidance: small components (pins, bushings, seals) may cost from tens to a few hundred dollars, rollers and idlers several hundred to a few thousand, final drives and travel motors can range from a few thousand to over ten thousand dollars, and complete undercarriage replacement for large machines can be tens of thousands. Always ask suppliers for a detailed quote that includes shipping and installation recommendations.

Why Kyotechs is a reliable source for your excavator undercarriage parts list

Kyotechs, established in 2009, supplies a full range of parts for major excavator brands including Hitachi, Sany, Kawasaki, Volvo, Hyundai, Doosan, Komatsu, Caterpillar, Case, and Kobelco. Our catalog covers engine assemblies, hydraulic pumps and motors, control valves, cylinders and seal kits, driving cabins, electric components, undercarriage parts, mini excavator parts, pile drivers, and hammers. We provide One-Stop Excavator Software, Engine Repair, and Hydraulic Repair solutions — enabling buyers to source matched components and technical support for installations and aftersales.

Practical checklist for assembling your excavator undercarriage parts list

Create a parts list that includes part numbers, machine model/serial, wear observations, urgency (critical/next service/seasonal), supplier cross-reference, and estimated cost. This checklist helps procurement teams avoid downtime and ensures repair crews arrive with the correct parts to complete jobs fast.

Conclusion: use this excavator undercarriage parts list to buy smarter and reduce downtime

Knowing each component in an excavator undercarriage parts list, how to recognize wear, and how to choose between OEM and aftermarket replacement parts allows you to plan maintenance, control costs, and maximize equipment uptime. Partnering with an experienced supplier like Kyotechs gives access to cross-referenced parts, one-stop repair solutions, and technical guidance — all critical when undercarriage health determines productivity on-site.

Frequently Asked Questions

Q: What are the most commonly replaced parts on an excavator undercarriage?
A: Pins and bushings, track shoes/pads, sprockets, rollers (bottom and carrier), seals, and idlers are the most frequently replaced items due to normal wear and ground contact. Final drives and track frames are replaced less often but are higher-cost items when needed.

Q: How do I identify the correct part number for my excavator undercarriage components?
A: Use the machine’s serial number and model plate. Cross-reference existing part numbers or take measurements (pitch, width, bolt patterns) for items like track chains and sprockets. Reputable suppliers can help cross-match part numbers across brands.

Q: Is it better to replace single components or the full undercarriage?
A: It depends on wear patterns. If multiple components are heavily worn and mismatched, installing a full undercarriage kit often yields the best lifespan. If wear is localized (e.g., only rollers or shoes), targeted replacements could be more economical.

Q: How often should I inspect my undercarriage?
A: Inspect visually every day for obvious damage and perform a more detailed check every 250–500 operating hours. Adjust intervals based on operating conditions; severe applications require more frequent checks.

Q: Can Kyotechs supply parts for all major excavator brands?
A: Yes. Kyotechs supplies undercarriage parts and a full range of components for brands including Hitachi, Sany, Kawasaki, Volvo, Hyundai, Doosan, Komatsu, Caterpillar, Case, and Kobelco, plus offers one-stop repair solutions and technical support.