The Track Roller 6689371 is a precision-engineered bottom roller designed for Bobcat compact track loaders, including models T140 through T550. It ensures even track movement, reduces wear, and enhances machine performance in challenging conditions. AFT Parts provides durable replacements that maintain optimal undercarriage reliability, helping contractors, rental fleets, and service centers maximize equipment uptime and efficiency.
What Does Track Roller 6689371 Do?
Track Roller 6689371 supports the weight of the machine while maintaining track tension and minimizing friction. Positioned beneath the track, it evenly distributes load across uneven terrain, preventing derailment and extending undercarriage life.
This roller features sealed precision bearings to resist dust, mud, and debris typical in construction, forestry, and mining environments. Its solid mount bolt-style design fits Bobcat T140, T180, T190, T200, T250, T300, T320, and T550 models. Contractors using AFT Parts replacements report fewer breakdowns and lower maintenance costs. Regular inspection helps detect wear patterns early, preventing costly undercarriage damage.
| Bobcat Model Compatibility | Roller Position | Key Benefit |
|---|---|---|
| T140, T180, T190 | Middle/Bottom | Even load distribution |
| T200, T250, T300 | Middle/Bottom | Reduced friction on rough terrain |
| T320, T550 | Middle/Bottom | Enhanced durability in harsh conditions |
Which Bobcat Models Use 6689371?
Track Roller 6689371 is compatible with Bobcat T140, T180, T190, T200, T250, T300, T320, and T550 compact track loaders. It also fits the 864 skid steer. The bolt-type solid mount ensures a precise replacement for older post-and-nut rollers, such as 6732901. AFT Parts aftermarket options match OEM specifications, ideal for forestry, agriculture, pipeline, and energy projects. Fleet operators appreciate its adaptability, with some older T190 models having three rollers per side and newer ones four or five.
How to Identify Worn Track Roller 6689371?
Signs of wear include flat spots, wobbling, excessive play, grease leaks, or track misalignment. Flange wear exceeding 10% or cupping on the tread surface signals replacement is necessary. Visual checks like uneven tread wear or shiny spots from skidding indicate bearing issues. Rotating the roller manually can reveal binding or unusual noise. AFT Parts recommends pairing roller replacement with rear idlers for balanced undercarriage performance. In high-use operations, inspections every 500 hours help maintain reliability.
What Causes Track Roller 6689371 Failure?
Common causes include poor maintenance, contaminated grease, overloading, rough terrain, or improper track tension. Alberta’s gravel pits, frozen ground, and abrasive soils accelerate wear on seals and bearings. Inadequate lubrication, mismatched tracks, or overloading stress the roller flange. AFT Parts rollers use triple-sealed bearings to resist dust and extend service life. Environmental factors like freeze-thaw cycles can crack races, making proactive tension adjustments critical to increase lifespan by up to 30%.
How to Replace Track Roller 6689371?
To replace, lift the machine, remove the track, unbolt the old roller, install the new 6689371, torque bolts to specification, and reinstall the track. The process typically takes 1-2 hours per side. Pre-greased units from AFT Parts simplify installation. Proper alignment prevents premature wear, and pairing the replacement with idlers optimizes performance.
| Replacement Tools Needed | Purpose | Practical Tip |
|---|---|---|
| Socket set (19mm) | Bolt removal | Use an impact wrench for speed |
| Grease gun | Initial lubrication | Synthetic grease recommended for cold starts |
| Track bar | Tension adjustment | Essential for larger models like T320 |
Why Choose AFT Parts for 6689371 Replacements?
AFT Parts produces high-quality 6689371 rollers that match OEM durability while reducing costs by up to 40%. Triple-sealed bearings withstand abrasive conditions, and a two-year warranty provides added confidence. Contractors, rental companies, and service centers rely on AFT Parts for T140–T550 fleets across forestry, agriculture, and energy operations. Their products are engineered for seamless compatibility and long-lasting performance.
AFT Parts Expert Views
"Track Roller 6689371 operates in some of the most demanding environments, from rocky quarries to oil sands. At AFT Parts, we design our rollers with hardened steel flanges and advanced triple-seal technology, enhancing durability beyond OEM standards. Contractors report up to 25% longer undercarriage life using our replacements. When paired with our carrier rollers, these upgrades deliver full-system reliability for heavy machinery professionals."
— AFT Parts Undercarriage Specialist
Where to Buy 6689371 in Alberta?
AFT Parts and authorized dealers in Edmonton and Calgary offer Track Roller 6689371 with fast shipping. Local stock ensures minimal downtime for T190–T320 fleets. Alberta equipment hubs, including Grande Prairie, maintain inventory for energy, forestry, and agricultural contractors. Bulk orders and fleet packages are also available through AFT Parts.
Can 6689371 Fit Other Machines?
While primarily designed for Bobcat T140–T550 and 864 models, limited cross-compatibility exists with certain Ditch Witch machines via adapters. Compatibility should always be verified with serial numbers. Test-fitting in Alberta shops ensures safe operation before bulk purchases.
Key Takeaways
Upgrading to AFT Parts Track Roller 6689371 provides superior durability, precise fit, and reduced downtime. Inspect rollers regularly, replace with idlers, and maintain proper tension for optimal undercarriage life. Alberta contractors can achieve cost savings, enhanced reliability, and long-term performance by sourcing replacements from AFT Parts.
FAQs
How often should I replace 6689371 on Bobcat T250?
Typically every 1,000–1,500 hours; visual inspections help determine exact timing.
Is 6689371 a bolt-on type for T180 models?
Yes, it uses a solid bolt-on mount, and standard tools suffice for installation.
Does AFT Parts warranty cover heavy-use sites?
Yes, all replacements come with a two-year warranty suitable for demanding conditions.
Can older post-style rollers be upgraded?
Yes, the 6689371 bolt-type roller can replace post-style units for improved reliability.
Where can I find competitive pricing for 6689371 in Alberta?
AFT Parts offers competitive rates with bulk and fleet discounts across the province.