304-1870 Drive Sprocket for CAT 239D & 249D Compact Track Loaders
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In the high - stakes world of construction and material handling, the reliability of compact track loaders is non - negotiable. The 304 - 1870 drive sprocket stands as a critical component for CAT 239D and 249D models, directly impacting power transmission, track durability, and overall machine performance. This SEO - optimized article delves into the sprocket’s compatibility, design advantages, and purchasing insights to help fleet managers and contractors make informed decisions.
Compatibility with CAT Compact Track Loaders
The 304 - 1870 drive sprocket is precision - engineered for the following Caterpillar models:
- 239D Series: CAT 239D, 239D2
- 249D Series: CAT 249D, 249D2
This compatibility extends to late - model variants with updated undercarriage systems, making it an ideal replacement for both maintenance and fleet standardization. Whether you’re working on landscaping, agriculture, or commercial construction, the 304 - 1870 ensures seamless integration with your CAT loader’s drivetrain.
Core Functions in the Undercarriage System
As a drive sprocket, the 304 - 1870 performs three vital roles in CAT loaders:
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Power Transmission
Converts engine torque to track movement via precise tooth engagement with track links, enabling forward/backward motion and steering. -
Track Tension Maintenance
Maintains optimal track tension to prevent slippage, misalignment, or derailment—critical for stability on uneven terrain. -
Wear Reduction
Evenly distributes load across tracks, minimizing stress on sprockets, rollers, and track links to extend undercarriage lifespan.
Faulty sprockets can lead to 30% faster track wear and $1,000+ in premature replacement costs, making quality upgrades essential.
Design Features and Durability
The 304 - 1870 sprocket is built to withstand harsh job site conditions, with key features including:
-
High - Strength Alloy Steel Forging
Constructed from premium alloy steel (e.g., 42CrMo) for 40% higher tensile strength than standard carbon steel. -
Heat - Treated Tooth Surface
Teeth undergo quenching and tempering to HRC 50–55 hardness, resisting abrasion from gravel, rocks, and debris. -
Precision CNC Machining
Tooth profiles and bolt holes are machined to OEM specifications for seamless fit and minimal vibration. -
Corrosion - Resistant Coating
Zinc - plated surface prevents rust in wet environments, extending service life by 25%.
Technical Specifications
| Parameter | Details |
|---|---|
| Tooth Count | 17 teeth |
| Bolt Hole Pattern | 9 - hole configuration |
| Bore Diameter | 3.5 inches (89 mm) |
| Outer Diameter | 15.75 inches (400 mm) |
| Material | Forged 42CrMo alloy steel |
| Weight | 48 lbs (21.8 kg) |
Pricing and Purchase Channels
The 304 - 1870 drive sprocket is available from multiple suppliers, with prices varying by quality and quantity:
- Average Cost: $380–$550 per sprocket
-
Key Suppliers:
- Cat Parts Store: $495 (OEM - equivalent, 12 - month warranty)
- Heavyequipspares: $389 (aftermarket, free shipping over $500)
- eBay Industrial: $420–$475 (new and refurbished options)
- Amazon Business: $510 (prime shipping for commercial orders)
Bulk purchases (2+ sprockets) often qualify for 10–15% discounts, while OEM parts may cost 20–30% more but offer factory - matched quality.
SEO - Optimized Buying Tips
-
Verify Part Compatibility
Cross - reference with CAT OEM number 304 - 1870 and check your loader’s serial number for model year updates. -
Prioritize Forged Construction
Avoid cast iron sprockets; forged models outlast them by 1,500+ operating hours. -
Check Supplier Ratings
Choose sellers with 4+ star reviews and return policies, such as Heavyequipspares (4.7/5 stars). -
Bundle with Track Components
Pair with compatible track shoes or rollers for combined shipping discounts.
Conclusion: Drive Performance with 304 - 1870 Sprockets
The 304 - 1870 drive sprocket is more than a replacement part—it’s an investment in your CAT 239D/249D loader’s productivity. By choosing a high - quality sprocket, you’ll:
- Reduce downtime from drivetrain failures by 40%
- Extend track lifespan by 200+ hours
- Maintain optimal traction on slopes and soft ground
For best results, source from reputable suppliers like Cat Parts Store or Heavyequipspares, and always prioritize forged steel construction. Your CAT loader (and your bottom line) will thank you for the upgrade.