CAT 2307162 E6015/E6015B-Track Roller Group/Track Support Roller Assy/Heavy-Duty Excavator Undercarriage Components manufacturer and Supplier offer High quality undercarriage spare parts

Product Specifications

Technical Data Sheet: Undercarriage Track Roller Assembly

Part Identification:

• OEM Part Number: 2307162

• Compatible Machine Models: Caterpillar 6015, Caterpillar 6015B Hydraulic Mining Shovels.

• Application: Undercarriage System, Lower Travel Assembly.

1.0 Component Overview

The Part Number 2307162 is a Track Roller Assembly, a critical load-bearing component within the undercarriage system of heavy-duty, track-type mining shovels. This assembly is engineered to support the machine's operational weight, guide the track chain, and facilitate smooth travel over varied and often severe terrain. It functions as an intermediate rotary element between the main undercarriage frame and the track chain, translating the machine's massive gravitational load into rotational motion with minimal friction.

2.0 Primary Function & Operational Context

The core functions of this assembly are:

• Load Bearing: To bear and distribute the dynamic and static loads of the machine (approximate operating weight of 140,000 kg) through the track roller to the track chain and ultimately to the ground.

• Track Guidance: To maintain precise alignment of the track chain, preventing lateral drift and ensuring the track runs true along the entire undercarriage path.

• Friction Reduction: To provide a hardened, durable rolling surface for the track chain links, thereby reducing sliding friction and associated wear on both the chain and the undercarriage components.

3.0 Detailed Construction & Key Sub-Components

A typical Track Roller Assembly (2307162) consists of the following integral parts:

• 3.1 Outer Rim / Tread: The outermost circumferential surface that makes direct contact with the track chain links. It is manufactured from high-carbon, through-hardened or induction-hardened boron steel to achieve extreme surface hardness (typically 55-65 HRC) for superior resistance to abrasion and rolling-contact fatigue.

• 3.2 Flanges: Integrated lateral guides on one or both sides of the tread. These flanges prevent the track chain from disengaging from the roller during side-loading events or when operating on slopes, ensuring continuous and stable tracking.

• 3.3 Hub & Shaft Assembly: The central structural core. A hardened and ground alloy steel shaft is pressed and secured into the roller housing. This shaft serves as the stationary axle.

• 3.4 Bearing System: A set of heavy-duty, tapered roller bearings are mounted between the rotating roller body and the stationary shaft. These bearings are specifically selected for their capacity to handle high radial loads (from the machine's weight) and significant axial (thrust) loads encountered during turning and side-slope operation.

• 3.5 Sealing System: A multi-component, labyrinth-style seal, often incorporating a radial face seal and an exterior dust lip. This system is critical for excluding abrasive contaminants (e.g., silica dust, slurry, moisture) and retaining high-temperature, extreme-pressure (EP) lithium-complex grease within the bearing cavity. The integrity of this seal is the primary determinant of the assembly's service life.

• 3.6 Housing/Body: The main body of the roller, which houses the internal components. It is typically a single, robust steel casting or forging, designed with internal galleries for efficient lubrication distribution.

4.0 Material & Performance Specifications

• Material: Forged or Cast Alloy Steel (e.g., AISI 4140 or 4340), heat-treated for optimal strength-to-toughness ratio.

• Hardness: Tread and flange working surfaces are hardened to a depth sufficient to withstand wear throughout the expected service interval.

• Lubrication: Pre-filled with high-performance grease. Fitted with a standard grease fitting (zerk) for periodic re-lubrication during service intervals.

• Load Rating: Engineered to meet or exceed the OEM's dynamic and static load specifications for the CAT 6015/6015B platform.

5.0 Failure Modes & Maintenance Considerations

• Wear Limits: Serviceability is determined by measuring the reduction in flange height and tread diameter against OEM-provided wear limits. Exceeding these limits risks track derailment.

• Common Failure Modes:

  • Abrasive Wear: Gradual material loss on the tread and flanges due to contact with the track chain and ambient abrasives.

  • Spalling/Fretting: Surface fatigue on the tread or bearing races due to repeated high-stress cycles.

  • Bearing Seizure: Typically a secondary failure caused by seal integrity loss, leading to lubricant contamination and eventual bearing failure.

  • Flange Fracture: Resulting from high-impact side loads or material fatigue.

⚙️ Function and Role in the Undercarriage System

The Track Roller Assembly is a vital part of the undercarriage system . Its primary functions are:

• Weight Distribution and Support: It carries the substantial weight of the excavator (e.g., 140 tons for the CAT 6015)  and distributes it evenly across the track chain, which in turn spreads the ground pressure.

• Guide and Alignment: The rollers run along the inner contour of the track chain, guiding it in a smooth path and maintaining proper alignment to prevent derailment and uneven wear.

• Durability in Harsh Environments: Built to withstand the extreme conditions of mining and heavy construction sites, including exposure to abrasive materials, high-impact loads, and constant vibration.