Doosan DX300LC-7 Track Roller / Bottom Roller 270-00048E – Heavy-Duty Undercarriage Component

Description

The Doosan DX300LC-7 Track Roller, part number 270-00048E, also commonly known as a bottom roller or lower roller, is an indispensable cylindrical component of your excavator’s undercarriage system. Strategically positioned along the track frame, its primary functions are to support the considerable weight of the machine, facilitate the smooth movement of the track chain, and minimize friction as the track links traverse. This precise function ensures even weight distribution, which not only enhances the excavator’s stability and prevents it from sinking into soft or uneven ground but also absorbs shocks and vibrations encountered during operation. This absorption protects the overall undercarriage structure from excessive stress and significantly contributes to operator comfort and control. This specific roller is designed for compatibility with Doosan DX300LC and DX340LC series excavators, among others, ensuring reliable performance across a range of heavy-duty models.

Manufactured to exacting OEM specifications, this track roller is typically forged or cast from high-strength alloy steel. Its running surface undergoes a meticulous heat treatment process, achieving a deep hardened depth and a high surface hardness (typically HRC52-58). This advanced metallurgical treatment provides exceptional wear resistance and longevity, even when exposed to highly abrasive materials and subjected to heavy operational loads. The roller is engineered to be sealed and lubricated for life, often being pre-filled with specialized oil, which effectively prevents the ingress of harmful contaminants like dirt, sand, and moisture. This sealed design maintains consistent, low-friction rotation and eliminates the need for frequent lubrication maintenance. Furthermore, it incorporates robust bearings (e.g., tapered roller bearings) designed to efficiently manage both substantial radial and axial forces, ensuring reliable operation over extended periods.

The integrity of track rollers is paramount for the overall health and operational efficiency of your excavator. Worn or damaged rollers can lead to a cascade of problems, including increased friction, accelerated wear on other vital undercarriage components such as track links, idlers, and sprockets, reduced machine stability, and a higher risk of track de-tracking. Considering that these components constantly operate in challenging environments—exposed to mud, water, ash, and significant impacts—their inherent wear resistance and the reliability of their bearing seals are absolutely critical. Replacing compromised rollers with high-quality, OEM-standard parts like the 270-00048E is essential for restoring optimal machine mobility, maintaining track system integrity, safeguarding your substantial undercarriage investment, and minimizing costly, unplanned downtime. This track roller is an ideal replacement part for both routine maintenance and when addressing performance issues stemming from undercarriage wear.

Key Features:

• OEM-Standard Quality: Guarantees a perfect fit, uncompromised quality, and adherence to original factory performance specifications for Doosan DX300LC-7 and compatible excavators.
• High-Strength Alloy Steel Construction: Fabricated from premium forged or cast alloy steel for maximum durability and robust resistance to wear and impact in demanding conditions.
• Advanced Heat Treatment: Features a deeply hardened running surface (typically HRC52-58) with a specific depth for exceptional longevity and sustained performance.
• Sealed & Lubricated for Life: Equipped with heavy-duty seals and factory-filled lubrication (often oil-filled) to provide maintenance-free, smooth operation and superior protection against contaminants.
• Precision Engineering: Designed for accurate track guidance and consistent, low-friction rotation, reducing stress and wear across the entire track system.

Benefits:

• Optimizes Machine Stability: Efficiently supports the excavator’s weight, significantly enhancing overall stability and preventing the machine from sinking in challenging ground conditions.
• Extends Undercarriage Lifespan: Reduces wear and tear on other vital undercarriage components, leading to a considerably longer operational life for the entire track system.
• Enhances Operational Efficiency: Ensures smooth and reliable track movement, directly contributing to improved machine mobility, traction, and overall productivity on various job sites.
• Superior Durability: Built to withstand severe loads, abrasive environments, and harsh impacts, providing reliable service and reducing the frequency of costly replacements.
• Minimizes Downtime & Repair Costs: High-quality construction and robust design reduce the likelihood of unexpected failures, helping to prevent extensive repairs and maximize operational uptime.