Komatsu Excavator Bottom Track Roller for PC75UU-3, PC78US-6, PC78US-8 & PC78UU-6 – 201-30-00314
Let Northline Parts Do the Heavy Lifting for You!
Not sure which part you need? Our team can help you find the right replacement.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
- Komatsu PC75UU-3 excavator
- Komatsu PC78US-6 excavator
- Komatsu PC78US-8 excavator
- Komatsu PC78UU-6 excavator
Important fitment note: Verify undercarriage serial, mounting bolt pattern and track chain; this is a bottom roller, not an upper carrier roller.
Product Overview
A noisy or flat-spotted lower roller can accelerate track wear and make the machine unstable when travelling.
The lower roller carries the track chain and helps the machine move with the correct alignment and load distribution. Replacing a damaged roller can prevent further wear, provided the mounting dimensions and track profile are correct.
Verify undercarriage serial, mounting bolt pattern and track chain; this is a bottom roller, not an upper carrier roller.
Key Features & Performance
- <b>Replacement application:</b> This replacement bottom track roller is designed for select Komatsu excavators, including PC75UU-3, PC78US-6, PC78US-8 and PC78UU-6. Replaces lower roller number #201-30-00314.
- <b>Correct component:</b> Bottom track roller for the applications or exact configuration described above.
- <b>Selection details:</b> Verify undercarriage serial, mounting bolt pattern and track chain; this is a bottom roller, not an upper carrier roller.
- <b>Identifying specifications:</b> Lower track roller, Komatsu undercarriage.
Specifications
- <b>Part type:</b> Bottom track roller
- <b>OE / manufacturer reference(s):</b> 201-30-00314
- <b>Northline Parts SKU:</b> NLT2S01249
- <b>Specification:</b> Lower track roller
- <b>Specification:</b> Komatsu undercarriage
Replaces / Cross-References
Reference part numbers:
- 201-30-00314
These numbers are supplied for identifying the correct part. Numbers shown here are not automatically proof that differently configured assemblies interchange; check the original part number and equipment parts diagram.
Installation & Fitment Notes
Verify undercarriage serial, mounting bolt pattern and track chain; this is a bottom roller, not an upper carrier roller.
Before ordering or installation, compare the replacement against the original equipment service manual and confirm any electrical, hydraulic, dimensional, model-year or serial-number restrictions. Service procedures should be performed by qualified personnel when specialized equipment or safety-critical systems are involved.
Frequently Asked Questions
Is this an OEM part?
This listing is presented as a replacement part. Manufacturer names and numbers identify compatibility, not a claim that the product is manufactured by the named OEM. For branded finished electronics, verify the actual manufacturer and condition before purchase.
How can I confirm compatibility?
Check the complete equipment model or model/serial number, then compare the removed part and its identifying details. Verify undercarriage serial, mounting bolt pattern and track chain; this is a bottom roller, not an upper carrier roller.
What problem does this part address?
A noisy or flat-spotted lower roller can accelerate track wear and make the machine unstable when travelling.
What is included?
The listing covers the component or set named in the product title. Additional hardware, wiring, gaskets, seals, adapters or fluids should not be assumed unless they are clearly specified in the product photographs or supplied contents.
Part Summary
Part: Bottom track roller
Applications: Komatsu PC75UU-3 excavator; Komatsu PC78US-6 excavator; Komatsu PC78US-8 excavator; Komatsu PC78UU-6 excavator
Reference numbers: 201-30-00314
Key specifications: Lower track roller; Komatsu undercarriage
Purpose: A noisy or flat-spotted lower roller can accelerate track wear and make the machine unstable when travelling.
Northline Parts SKU: NLT2S01249
Keywords: Bottom track roller, Komatsu Excavator Bottom Track Roller for PC75UU-3, PC78US-6, PC78US-8 & PC78UU-6, NLT2S01249, 201-30-00314, Komatsu PC75UU-3 excavator, Komatsu PC78US-6 excavator, Komatsu PC78US-8 excavator, Komatsu PC78UU-6 excavator, Northline Parts, Bottom track roller replacement, Bottom track roller fitment.
Fitment reminder: Verify undercarriage serial, mounting bolt pattern and track chain; this is a bottom roller, not an upper carrier roller.