1. Product Overview

6Y2547 bearing cup is the dedicated outer ring of tapered roller bearing for large Caterpillar D10R bulldozers, manufactured fully compliant with Caterpillar OEM drawing dimensions. This separate outer ring can be assembled with matched rollers and inner ring to form a complete bearing, installed on heavy-load support positions of bulldozer final drives and axles. During heavy bulldozing and climbing work, the raceway of bearing cup continuously bears high-pressure alternating impact loads from rollers. It features high material hardness and minimal stress deformation. Only the damaged outer ring can be replaced separately instead of the whole bearing, greatly cutting spare parts maintenance costs for construction machinery.

2. Material & Processing Advantages

This part is integrally forged from premium bearing steel, treated with complete quenching and tempering heat treatment for uniform overall hardness and qualified wear-resistant raceway layer, delivering excellent resistance to pitting and surface spalling. The inner raceway adopts mirror super-finish grinding with extremely low surface roughness, which reduces friction and heat generation during bearing operation to prevent rapid raceway wear caused by high temperature. The outer circle of the cup is precision turned with tight dimensional tolerance, ensuring tight fit inside the drive housing without excessive play or loosening during operation. The separate cup design allows replacing only the damaged outer ring during maintenance, saving purchasing cost of a full bearing set.

3. Precision Grade Selection Guide

• P0: Standard general precision with high cost performance, ideal for regular earthmoving bulldozing work in mines and construction sites, and daily maintenance single cup replacement
• P6: Tighter tolerance for raceway and outer diameter improves assembly concentricity, reduces running vibration and temperature rise, perfect for engineering fleets working 24-hour continuous heavy-duty construction
• P5: High-precision grade for complete bulldozer overhaul and final drive system performance upgrade. Higher precision raceway greatly improves running stability of the full bearing assembly

4. Quality & Installation Instruction

6Y2547 bearing cup is strictly produced to Caterpillar OEM specifications, no secondary machining such as grinding or reaming required, it can be directly assembled with OEM matched rollers and inner rings. Every product passes full inspection on outer diameter tolerance, raceway hardness and raceway finish before delivery. Custom P0/P6/P5 precision grades are available for bulk orders. Thoroughly clean the drive housing bore and outer wall of bearing cup before installation, press in evenly instead of striking the raceway directly to avoid damage. Fill sufficient special lubricating grease after assembly to effectively extend service life of the full bearing set.

5. Application Scenarios

Widely applied to final drive and axle repair of heavy Caterpillar D10R bulldozers, export wholesale of Caterpillar construction machinery spare parts and regular maintenance of large mining & infrastructure engineering fleets. It solves common failures of original bearing outer rings including raceway pitting, wear, surface spalling, loose abnormal running noise and reduced load capacity. Replacing only the bearing cup can greatly reduce spare parts purchasing cost for equipment maintenance.