Caterpillar Excavator Parts
Aftermarket Caterpillar Excavator Parts
Construction Parts PNW supplies aftermarket undercarriage, bucket, wear, and attachment components for Caterpillar excavators and mini excavators. Use the machine model, serial number, or existing part number to narrow the correct configuration, or visit the Caterpillar Parts Hub for other Cat equipment families.
Excavator Undercarriage Parts
Available components may include track chains, track shoes, bottom and carrier rollers, front idlers, sprockets, track adjusters, recoil assemblies, guards, and mounting hardware. Undercarriage parts wear as a connected system, so inspect chain pitch, rail height, rollers, idlers, sprockets, shoe condition, alignment, and track tension together.
Track Chains and Shoes
Confirm pitch, link count, shoe width, bolt pattern, and grouser style. Machine configuration and serial-number breaks can change the required assembly even within the same model family.
Rollers, Idlers, and Sprockets
Inspect tread surfaces, flanges, seals, alignment, and sprocket engagement. Uneven wear may point to tension, alignment, application, or operating-condition issues.
Bucket Teeth, Adapters, and Cutting Edges
Excavator ground engaging tools include bucket teeth, adapters, pins, retainers, side cutters, cutting edges, wear plates, heel shrouds, and protection components. Tooth profile should match the application, from trenching and general excavation to rock, demolition, and abrasive aggregate.
Do not select a tooth by appearance alone. Identify the tooth system, adapter nose, pin orientation, and any casting numbers. See our Bucket Teeth guide and broader Ground Engaging Tools hub.
Hydraulic and Attachment Wear Components
Depending on the machine and attachment, replacement needs may include pins, bushings, seals, couplers, thumb components, breaker tools, and mounting hardware. Provide the attachment manufacturer and model in addition to the excavator information.
How to Identify the Correct Cat Excavator Part
- Complete excavator model and serial number
- Standard, long-reach, reduced-radius, or mini-excavator configuration
- Bucket or attachment manufacturer and model
- Existing part, casting, or arrangement number
- Track width, chain pitch, and link count for undercarriage
- Dimensions and clear photos from several angles
Submit these details through our Part Finder Request for fitment help.
Common Excavator Wear Indicators
- Uneven track or roller wear
- Repeated loss of track tension
- Hooked sprocket teeth
- Loose bucket teeth or worn adapter noses
- Excessive pin-and-bushing movement
- Cracked or thin side cutters and wear plates
Follow Caterpillar inspection procedures and service limits before replacing components.
Caterpillar Excavator Parts FAQs
Is the machine model enough to identify undercarriage parts?
Not always. Serial number, track width, chain pitch, link count, and machine configuration may also be required.
What should I send when a bucket-tooth number is unreadable?
Send photos of the tooth and adapter, adapter-nose measurements, pin orientation, machine details, and bucket information.
Should connected undercarriage parts be inspected together?
Yes. Chains, rollers, idlers, sprockets, and shoes interact, and a severely worn component can shorten the life of a replacement.
Request Caterpillar Excavator Parts
Send your machine details through our quote request, or call 253-255-1775.