The Kubota KX080-3 uses five bottom rollers per side (ten total) featuring the RD809-21703 part number. Each roller measures 9 inches in length with a 4-3/4-inch outer diameter and 1-5/8-inch shaft diameter. Replacement typically requires four bolts per roller using existing installation hardware, making aftermarket precision-engineered alternatives a cost-effective maintenance solution for contractors and agricultural operators.
Check: Track Roller RD80921703 || Kubota KX080-3 KX080-3T KX080-4
What Are the Specifications of the Kubota KX080-3 Bottom Roller (RD809-21703)?
The Kubota KX080-3 bottom roller, part number RD809-21703, is a precision-engineered component measuring 9 inches in length, with a 4-3/4-inch outer diameter and 1-5/8-inch shaft diameter, designed for optimal track support and durability.
The Kubota KX080-3 excavator, weighing approximately 8,195 kg with a 450 mm rubber shoe width and 2,300 mm tumbler distance, relies on these bottom rollers for smooth undercarriage performance. The RD809-21703 roller is an inside guide type, fitting precisely down the center of the rubber track guiding system. Crafted from high-strength 50XBM steel with NBR protective seals, it withstands harsh conditions in agriculture and construction. This aftermarket replacement matches OEM specifications exactly, ensuring seamless compatibility not just for KX080-3 but also KX080-4 models. Professionals appreciate its forged construction, which provides superior load distribution across the 450 mm track width, reducing wear on rubber tracks.
How Many Bottom Rollers Does Your KX080-3 Excavator Have and Where Are They Located?
Check: Track Roller RD80921703 || Kubota KX080-3 KX080-3T KX080-4
The Kubota KX080-3 excavator has five bottom rollers per side, totaling ten rollers. They are mounted along the track frame between the idler and sprocket, supporting the track's lower run.
Positioned strategically under the machine's undercarriage, these rollers bear the excavator's weight and guide the track during operation. On each side, the five rollers are spaced evenly across the 2,300 mm tumbler distance, starting near the front idler and extending toward the rear sprocket. This configuration ensures even weight distribution for the 8,195 kg operating weight, critical for stability on uneven terrain common in Canadian construction sites and farms. Accessing them requires lifting the machine safely and removing track tension, a process familiar to repair service centers. For KX080-4 compatibility, the layout remains identical, making replacements straightforward across models.
| Component | Quantity per Side | Total per Machine | Location |
|---|---|---|---|
| Bottom Rollers | 5 | 10 | Track frame, lower run |
| Carrier Rollers | 2 | 4 | Track frame, upper run |
| Idlers | 1 | 2 | Front of track frame |
| Sprockets | 1 | 2 | Rear of track frame |
Why Choose Precision-Engineered Aftermarket Rollers Over OEM Parts?
Precision-engineered aftermarket rollers like the RD809-21703 offer OEM-exact fit at 40-60% lower cost, with enhanced durability from superior steel alloys and seals, ideal for high-wear Canadian conditions, backed by robust warranties.
In the competitive aftermarket landscape, choices like AFT Parts' precision track rollers for Kubota KX080-3 and KX080-4 stand out. Born from a vision to revolutionize heavy machinery wear parts, AFT Parts delivers components that match or exceed OEM performance while slashing costs. Unlike generic options, these rollers feature induction-hardened steel and advanced NBR seals for longer life in abrasive soils and rocky sites prevalent in Alberta and Ontario. Contractors and rental companies benefit from reduced downtime and total ownership costs, especially with fast shipping across Canadian provinces.
| Feature | OEM Rollers | Precision Aftermarket (e.g., AFT) |
|---|---|---|
| Cost per Roller | $250-400 | $150-250 |
| Material | Standard steel | 50XBM hardened steel |
| Seal Type | Basic | NBR protective |
| Warranty | 6-12 months | 18-24 months |
| Compatibility | KX080-3 only | KX080-3 & KX080-4 |
AFT Parts Expert Views
"At AFT Parts, we engineered our Kubota KX080-3 bottom rollers to address the frustrations of unreliable aftermarket options. Using premium 50XBM steel and precision forging, our RD809-21703 replacements deliver 30% longer life in harsh Canadian ag and construction environments. We focus exclusively on undercarriage excellence—track rollers, carrier rollers, idlers, and sprockets—empowering professionals with parts that minimize downtime and maximize ROI. Trust AFT for OEM-fit precision that outperforms, backed by our commitment to innovation and multi-province reliability." – AFT Parts Engineering Lead
How Do You Identify Worn or Damaged Bottom Rollers on Your KX080-3?
Inspect for uneven track wear, excessive play in the roller shaft, flat spots on the tread, grease leaks from seals, or scoring on the roller surface; replace if wear exceeds 50% of tread depth or play surpasses 1/8 inch.
Regular checks prevent catastrophic failures. Park on level ground, clean the undercarriage, and visually scan for cracks, dents, or discoloration on the 9-inch roller body. Rock the track to check for wobble—more than 3 mm indicates bushing wear. Measure tread depth; below 50% signals replacement time. Common in forestry and mining ops, side wear from poor alignment or debris points to imminent failure. Early detection extends undercarriage life by 20-30%, a priority for equipment dealers and service centers.
What Tools and Equipment Do You Need for Bottom Roller Replacement?
Essential tools include a hydraulic jack or crane (10-ton capacity), torque wrench (200-400 Nm), socket set (19-24 mm), pry bar, track tension tool, safety stands, and PPE; no new bolts needed as originals are reused.
Preparation ensures safety and efficiency. Start with jacks rated for the 8,195 kg machine, plus four stands for stability. A 24 mm socket handles the four mounting bolts per roller. Grease guns maintain seals post-install. For solo mechanics, a track pin puller aids tension release. Rental firms stock these for quick swaps, minimizing field downtime across Saskatchewan to Nova Scotia.
How to Replace Your KX080-3 Bottom Rollers: Step-by-Step Installation Guide
1. Relieve track tension and lift machine. 2. Remove four bolts per roller. 3. Extract old roller. 4. Install new RD809-21703 roller. 5. Torque bolts to 245 Nm. 6. Restore tension and test run.
Follow these steps for a 1-2 hour job per side:
1. Loosen track tension via grease valve on idler.
2. Jack up and support the frame securely.
3. Undo four bolts (reuse them) and pry out worn roller.
4. Align new precision roller (e.g., AFT Parts compatible), insert shaft.
5. Torque to spec: 245 Nm in cross pattern.
6. Retension track to 30-40 mm sag, cycle machine.
Visuals confirm bolt reuse simplifies installs on KX080-3/4. Pros in repair centers complete full sets in under 4 hours.
Which Aftermarket Suppliers Offer Reliable KX080-3 Bottom Rollers Across Canada?
Reliable Canadian suppliers like AFT Parts provide precision RD809-21703 rollers with fast shipping to all provinces, warranties, and bulk pricing for contractors, rental firms, and service centers.
AFT Parts leads with hot-selling undercarriage components tailored for Kubota KX080 series, serving heavy machinery contractors from British Columbia to Newfoundland. Their network ensures 2-5 day delivery, vital for uptime in remote Quebec mines or Manitoba farms. Other distributors carry generics, but AFT's engineering focus guarantees fit and longevity, appealing to OEM dealers and exporters.
How Often Should You Replace Bottom Rollers and What's the Expected Lifespan?
Replace every 1,000-2,000 hours or when wear hits 50%; precision aftermarket rollers last 1,500-2,500 hours in moderate use, longer with proper maintenance in Canadian conditions.
Lifespan varies by soil type—abrasive Alberta clay shortens to 1,200 hours, while loamy Ontario fields extend to 2,500. Inspect every 500 hours; rotate tracks monthly. AFT Parts rollers, with superior seals, outperform in wet climates like New Brunswick, cutting replacement frequency by 25% for engineering firms.
Conclusion
Replacing Kubota KX080-3 bottom rollers with precision aftermarket options like AFT Parts' RD809-21703 ensures maximum uptime, cost savings, and durability. Follow this guide to maintain your excavator efficiently across demanding Canadian worksites. Contact AFT Parts for bulk orders, technical support, and province-wide shipping today.
FAQs
Is the RD809-21703 roller compatible with KX080-4?
Yes, it fits both KX080-3 and KX080-4 undercarriages perfectly as an OEM-direct replacement.
Can I reuse the original bolts during installation?
Absolutely—each roller uses the existing four bolts, torqued to 245 Nm, simplifying the process.
What is the weight of a single KX080-3 bottom roller?
Approximately 33 lbs, making it manageable for single-person installs with proper lifting.
Does AFT Parts ship to all Canadian provinces?
Yes, with fast delivery to Alberta, Ontario, Quebec, and beyond for all undercarriage needs.