KUBOTA 68311-46990 Rubber

( Manufacturer Part Number: 68311-46990 )

Review KUBOTA Rubber

The **Kubota 68311-46990 Rubber** is a high-quality, precision-engineered rubber component designed specifically for Kubota s line of heavy-duty agricultural and industrial equipment, ensuring optimal performance, durability, and reliability in demanding applications. This rubber part is meticulously crafted from a proprietary blend of synthetic and natural rubber compounds, engineered to withstand extreme environmental conditions, including prolonged exposure to UV radiation, ozone, moisture, and temperature fluctuations ranging from sub-freezing temperatures to scorching heat. Its robust construction features a reinforced casing with embedded fabric layers, providing exceptional resistance to abrasion, tearing, and deformation, which is critical for machinery operating in rugged terrains or under heavy loads. The rubber s chemical composition also includes anti-aging additives and stabilizers, extending its operational lifespan and reducing the need for frequent replacements, thereby minimizing downtime and maintenance costs for operators. Whether integrated into hydraulic hoses, seals, belts, or other critical components, this rubber part delivers seamless compatibility with Kubota s engineering standards, ensuring a tight, leak-proof fit that maintains system integrity under high-pressure conditions. Its smooth yet resilient texture further enhances efficiency by reducing friction and energy loss, contributing to the overall longevity and performance of the equipment it serves. Ideal for use in tractors, loaders, harvesters, and other Kubota machinery, this rubber component exemplifies the brand s commitment to quality and innovation, offering a dependable solution for professionals who demand precision and endurance in their agricultural and industrial operations.

### Pros and Cons of Buying a Kubota L3900 (Rubber-Tired, Serial Number 68311-46990)

#### **Pros**

1. **Reliability and Durability** Kubota is known for building robust, long-lasting tractors. The L3900 series is particularly well-regarded for its durability, especially in agricultural and heavy-duty applications. The rubber-tired model offers better traction and comfort compared to wheeled alternatives, making it suitable for uneven terrain.

2. **Fuel Efficiency** The L3900 series is designed with fuel efficiency in mind, featuring a **3.3L Kubota D1303 diesel engine** (or similar, depending on model year). This engine is known for its balance between power and fuel consumption, reducing operational costs over time.

3. **Versatility** The L3900 is a mid-size utility tractor, making it adaptable for a wide range of tasks, including mowing, tilling, plowing, and hauling. Its **hydraulic system** and **PTO** are robust, allowing it to run various attachments without strain.

4. **Comfort and Ergonomics** Kubota tractors are designed with operator comfort in mind. The rubber tires reduce vibration, and the cabin (if equipped) provides better visibility and climate control compared to older models. The **steering and controls** are intuitive, reducing operator fatigue during long workdays.

5. **Resale Value** Kubota maintains strong resale value compared to some competitors. A well-maintained L3900 can retain a significant portion of its value, especially if it has a clean service history.

6. **Low Maintenance Costs** Kubota engines and transmissions are generally easier and cheaper to maintain than some competitors. The **fuel injection system** and **cooling components** are reliable, reducing unexpected repair costs.

7. **Safety Features** Modern Kubota tractors include safety features such as **ROPS (Roll-Over Protective Structure)**, **3-point hitch stability**, and sometimes **automatic shut-off systems**, reducing workplace hazards.

8. **Availability of Parts** Kubota has a widespread dealer network, ensuring easy access to genuine parts and service. This is particularly important for older models like this one, where aftermarket parts may not be as reliable.

9. **Good Power-to-Weight Ratio** The L3900 typically offers ** 70-80 HP**, which is sufficient for most small-to-medium farming operations, land clearing, or commercial landscaping without being overly powerful (and thus expensive to operate).

10. **Environmental Considerations** Kubota engines comply with emissions standards (likely **Tier 3 or Tier 4**, depending on the year), making them suitable for operations where environmental regulations are strict.

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#### **Cons**

1. **Age and Wear** The serial number **68311-46990** suggests this tractor is **likely 15-25 years old** (Kubota s serial numbering system places this model in the late 1990s to early 2000s). Older tractors may have:

- **Worn-out rubber tires** (even if they are rubber-tired, the tread may be bald or cracked).

- **Degraded hydraulic seals** (leading to leaks).

- **Worn transmission components** (clutch, synchronizers, or shift linkages).

- **Engine wear** (ring wear, valve issues, or fuel system clogging).

2. **Higher Maintenance Requirements** An older tractor will require **more frequent servicing** than a newer model. Key areas to inspect include:

- **Engine oil changes** (older engines may burn oil more).

- **Hydraulic fluid leaks** (rubber hoses degrade over time).

- **Battery health** (lead-acid batteries in older tractors fail more quickly).

- **Electrical issues** (failing solenoids, wiring, or sensors).

3. **Potential for Hidden Damage** Without a **full service history**, it s difficult to know if the tractor has been properly maintained. Common issues in older Kubotas include:

- **Transmission slipping or jerking** (if the clutch or synchronizers are worn).

- **Hydraulic pump failure** (leading to weak or inconsistent PTO operation).

- **Exhaust system leaks** (cracked manifolds or mufflers).

- **Rust or corrosion** (if stored in wet conditions).

4. **Fuel and Emissions Compliance** Older diesel engines may not meet **current emissions standards** if modified. Some jurisdictions require **retrofitting with DPF (Diesel Particulate Filters)** or **EGR systems**, which can be costly.

- **GPS guidance systems**.

- **Automatic steering or telemetry**.

- **Advanced diagnostics** (older models rely on manual troubleshooting).

- **Modern fuel injection** (some may still use **LDA or older common rail systems**, which are less efficient).

6. **Tire Replacement Cost** Rubber-tired tractors often have **larger, more expensive tires** than wheeled models. If the current tires are worn, replacing them could be a significant upfront cost.

7. **Dealer Support Limitations** While Kubota parts are available, **warranty coverage is unlikely** for an older model. Dealers may charge premium prices for labor on vintage equipment.

8. **Operational Noise and Vibration** Older tractors are generally **louder and more vibration-prone** than modern models, which can affect operator comfort over long hours.

9. **Attachment Compatibility** Some newer attachments may not fit perfectly due to **hydraulic or PTO differences** in older models.

10. **Financing Challenges** Older tractors may be **harder to finance** than newer ones, as lenders often prefer collateral with lower depreciation risk.

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### **Conclusion**

Buying a **Kubota L3900 (rubber-tired, 1995-2005 model year)** can be a **cost-effective choice** if you prioritize **reliability, durability, and low operating costs** over cutting-edge technology. It remains a **solid workhorse** for tasks like mowing, tilling, and light hauling, especially in rural or agricultural settings where modern tractors may be overkill.

However, **potential buyers should proceed with caution** due to the tractor s age. A **thorough inspection** (or a **pre-purchase test drive**) is essential to check for:

- **Engine health** (compression test, oil leaks, exhaust smoke).

- **Transmission and clutch condition** (smooth shifting, no grinding).

- **Hydraulic system integrity** (no leaks, proper PTO engagement).

- **Tire condition** (tread depth, cracks, wear patterns).

- **Electrical system** (battery, starter, lights, controls).

If the tractor is **well-maintained with a full service history**, it can be a **great bargain**. If it has **unknown maintenance issues or visible wear**, the **repair costs may outweigh its benefits**.

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### **Recommendation**

- **Buy it** if you can **inspect it thoroughly** or have a **trusted mechanic verify its condition**.

- **Budget for potential repairs** (especially engine, transmission, and hydraulics).

- **Consider refurbishing** (new tires, fresh fluids, minor upgrades) to extend its lifespan.

- **Avoid it** unless you re prepared for **higher maintenance costs** over time.

- **Consider a newer Kubota model (L3900 or similar, 2010 ) with extended warranty** for better reliability and technology.

- **Negotiate a lower price** based on a **pre-purchase inspection report**.

- **Avoid buying "as-is"** unless you re confident in your ability to assess mechanical health.

- **Newer Used Tractors (5-10 years old):** Offers better reliability with lower long-term costs.

- **Remanufactured Tractors:** Some dealers offer **fully rebuilt Kubotas** with warranties.

- **Smaller or Larger Models:** If the L3900 is too small/large for your needs, consider a **Kubota L2700 (smaller)** or **L5900 (larger)**.

This Kubota L3900 can be a **good buy for the right buyer** someone who values **proven durability over modern features** and is willing to **invest in maintenance**. However, **buyers should not expect it to last indefinitely without upkeep**, and they should **prioritize a thorough inspection** before purchasing. If budget allows, a **newer used or remanufactured Kubota** would be a safer long-term choice.

Details:

Kubota 68311-46990 Rubber: Part Number: Manufacturer. Manufactured following strict OE standards to work like the original component. Engineered using the latest technology to ensure product lasts longer in service. Made of high-quality components for durability, reliability, and performance.

Designed specifically for trucks, trailers, and buses. Engineered with a factory-like design for effortless installation, ensuring perfect match your vehicle.

part #: 6831146990 prices

• $7.80-$31.73

specifications atvfendersgo:

• for makes: Kubota
• mpn: 68311-46990

offer atvfendersgo:

• best offers: True
• availability: In Stock
• sold: 0
• options: Ship-to-home
• quantity: 2
• started: February 1, 2026

payments atvfendersgo:

• credit card: Visa
• wallet: Google-pay
• other

general atvfendersgo:

• Body Frame > Body Parts, doors Fenders > Fenders
• condition: New

returns atvfendersgo:

• policy: Returns Accepted
• paid by: Seller
• time: 30 Days

seller atvfendersgo:

• # reviews: 64077
• rating: 99.1%
• city: Los Angeles, California

shipping atvfendersgo:

• transit: 4-8 Days
• type: Fixed
• cost: $0.00
• class: Standard
• service: Standard

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