Track Roller
Bottom Roller and Lower Roller commonly appear as buyer or supplier terms for this lower support component, but usage can vary by machine and catalog. It supports and guides the lower, load-carrying section of the track chain.
Excavator Product Range
Excavator Undercarriage Parts
FY Machinery is a specialized excavator and bulldozer undercarriage-parts supplier with direct access to partner factories. We support product matching, sourcing coordination, and quality and order follow-up for excavator replacement requirements.
Excavator Track SystemCore Product Groups
Main Components
Core excavator undercarriage components
The range covers ground-contact, support, guidance, drive, tensioning, and assembled undercarriage parts for excavators. Each component has a distinct role and links to the relevant FY product group for detailed inquiry guidance.
01
Ground Contact
Track Shoes
Provide ground contact and mount to the track links. Steel track pad requests can be reviewed here; rubber track pad requirements should be identified separately.
02
Lower Support
Track Rollers
Support the machine along the lower track frame and guide the track chain through the loaded section of the excavator undercarriage.
03
Upper Chain Support
Carrier Rollers
Carry and guide the returning upper section of the track chain between the idler and drive end.
04
Track Guidance
Idlers
Guide the track chain at the front of the undercarriage and work with the tensioning system to support alignment.
05
Track Drive
Sprockets
Transfer drive force into the track chain through the matching chain and tooth interface.
06
Linked Assembly
Track Chains
Form the linked travelling assembly around the undercarriage and provide the mounting base for the track shoes.
07
Tension & Recoil
Track Adjusters / Recoil Springs
Support track-tension adjustment and recoil movement within the machine-specific undercarriage arrangement.
08
Combined Track Set
Complete Track Groups
Complete Track Group describes a broader assembled or combined track-side replacement scope. Exact included components can vary by machine, supplier terminology, and confirmed inquiry or order scope, so a bare Track Chain, a Chain with Track Shoes, and a Complete Track Group should not be assumed to be identical.
Buyer Terminology
Common names for excavator track parts
Buyers and parts books may use different names for the same component family. These common terms help clarify an inquiry without creating duplicate product routes.
Carrier Roller
Top Roller and Upper Roller may appear as buyer or supplier terms for this upper support component, but usage can vary by machine and catalog. It supports the returning chain above the track frame.
Idler
Often requested as a Front Idler or Idler Wheel. It guides the chain and works with the track-tensioning arrangement.
Sprocket
Also called a Drive Sprocket. It engages with the track chain to drive the track assembly.
Track Chain
A Track Link is an individual link in the chain. Track Link Assembly or Link Assembly may refer to an assembled track chain in parts terminology, so confirm whether the inquiry is for an individual link, a chain assembly, or a chain with shoes.
Track Adjuster
Also called a Track Tensioner. The request may refer to an adjuster assembly, recoil spring, or related component, so photos and references help clarify scope.
Inspection Clues
Signs that deserve a closer undercarriage inspection
These observations can indicate that the excavator undercarriage needs a closer check. They are not universal wear limits or replacement specifications.
- Uneven or visibly accelerated wear across track shoes, links, rollers, idlers, or sprocket teeth.
- Oil leakage, damaged seals, cracked parts, loose hardware, or missing components visible during a walk-around.
- Abnormal noise, vibration, impact, chain jumping, or rough movement while the machine travels.
- Track misalignment, poor tracking, or contact marks that suggest components are not following the expected path.
- A noticeable change in track sag or tension compared with the machine-specific setting and normal operating condition.
Follow the model-specific service manual inspection procedure and use qualified technical judgment for wear and tension decisions.
Replacement-Part Matching
How to identify the correct replacement part
Similar-looking components can differ by machine and undercarriage configuration. Send confirmed references rather than relying on appearance alone.
Machine make and model
Provide the excavator make and model designation exactly as shown on the machine records or identification plate.
Part number, if known
Share the number from the existing part, parts book, drawing, label, or previous purchase record when available.
Clear photos and dimensions
Send overall and close-up photos plus useful mounting, pitch, bore, bolt-pattern, or interface dimensions that can be measured reliably.
Required part and quantity
State the exact component or assembly needed, required quantity, and whether related parts should be included in the RFQ.
B2B Supply Support
Supplier coordination from inquiry to order follow-up
FY Machinery works through direct access to partner factories. Our role is to help buyers identify requirements, coordinate sourcing, and follow the confirmed order scope.
Partner-factory access
FY Machinery works as a specialized undercarriage-parts supplier with direct access to partner factories for sourcing and order coordination.
Product matching
The available machine, part-number, photo, and dimension information is reviewed before a replacement option is confirmed.
Quality and order follow-up
Applicable identification, quantity, visual, dimensional, packing, and order-reference checks can be coordinated for the confirmed order scope.
Factory-visit support
Visits to relevant partner factories can be coordinated where applicable to the product, order stage, and agreed visit arrangement.
Buyer Questions
Excavator undercarriage parts FAQ
What parts make up an excavator undercarriage?
The main replaceable groups include track shoes, track rollers, carrier rollers, idlers, sprockets, track chains, track adjusters and recoil springs, and complete track groups. The exact arrangement varies by excavator model and configuration.
How can I tell if an excavator undercarriage is worn?
Look for uneven wear, leakage, damaged or loose parts, abnormal travel noise or vibration, chain jumping, misalignment, and changes in track sag or tension. Use the machine manual and an experienced technician for model-specific inspection criteria; visual signs alone do not establish a universal replacement limit.
What information helps match an excavator undercarriage part?
Send the machine make and model, required part and quantity, part number if known, clear overall and detail photos, and useful dimensions. These details help distinguish similar-looking excavator track parts before an RFQ is confirmed.
Request for Quotation
Send your excavator undercarriage parts RFQ
Include the machine make and model, required part and quantity, part number if known, and available photos or useful dimensions. FY will review the information for replacement undercarriage parts matching and sourcing coordination.