KOMATSU 203-25-62100 Swing Circle – Product Overview
The swing circle (also called swing bearing or slewing ring) is the large-diameter bearing that connects the excavator’s upper structure to the undercarriage, enabling 360-degree rotation. It features internal or external gear teeth that mesh with the swing drive pinion. This critical component supports the full weight of the upper structure while transmitting axial and radial loads during digging and lifting operations.
Applications
This KOMATSU Swing Circle (203-25-62100) is specifically designed for KOMATSU PC100-6 Excavator. It is a direct OEM replacement manufactured to meet or exceed original equipment specifications. The component is compatible with standard hydraulic systems and mounting configurations used in these excavator models.
Technical Specifications
- OEM Part Number(s): 203-25-62100
- Brand: KOMATSU
- Product Type: Swing Circle
- Quality Standard: Japanese manufacturing precision
- Condition: Brand New / Aftermarket OEM Quality
- Material: High-strength alloy steel with precision heat treatment
Also Available / Compatible Models
In addition to the primary OEM part number(s) listed above, we also supply a wide range of compatible and interchangeable models for the same or similar applications. These alternative part numbers are functionally equivalent and can be used as direct replacements or cross-reference options:
- Primary Part Number(s): 203-25-62100
- Additional Compatible / Cross-Reference Part Numbers: 203-25-62110, 203-25-62000, 20Y-25-62100, 203-25-62101, 203-25-62111, 203-25-62120, 20Y-25-00400, 205-25-71152, 20Y-25-21200, 203-25-62130, 203-25-62010, 203-25-62200
These part numbers cover various OEM revisions, superseded versions, and interchangeable alternatives. Please contact our sales team with your machine model and serial number for precise compatibility confirmation before ordering. We stock most of these part numbers and can arrange expedited shipping for urgent requirements.
Installation Guide
- This is a complex installation that typically requires the upper structure to be lifted and separated from the undercarriage. Professional assistance is strongly recommended.
- Remove the swing drive motors and gearboxes to access the swing circle mounting bolts.
- Support the upper structure securely with heavy-duty jacks or a crane before removing the swing circle bolts.
- Clean the mounting surfaces on both the upper structure and undercarriage frame thoroughly.
- Position the new swing circle and apply thread locker to all mounting bolts.
- Tighten bolts in a crisscross pattern to the specified torque in at least two stages (50% then 100%).
- Reinstall the swing drive motors and gearboxes, ensuring proper gear mesh alignment.
- Lubricate the swing circle gear teeth with the recommended extreme-pressure grease.
- Perform a break-in procedure: 10 slow rotations in each direction, then 20 normal-speed rotations before full-load operation.
Price Range
The estimated price for this KOMATSU Swing Circle (203-25-62100) ranges from $1,200 to $4,800 USD, depending on the specific configuration, core exchange requirements, and current market conditions. We recommend contacting our sales team for a firm quote based on your specific needs and quantity requirements. Volume discounts are available for fleet operators and repair shops.
Maintenance Tips
- Grease the swing circle gear teeth every 50 operating hours or weekly using extreme-pressure lithium-based grease.
- Check and tighten swing circle mounting bolts every 500 hours using a torque wrench to the specified value.
- Inspect for abnormal clearance or play between the upper and lower structures by rocking the excavator boom.
- Listen for popping, grinding, or clicking sounds during rotation, which may indicate gear tooth damage or bearing race wear.
- Check the swing circle seal for damage. Water and debris ingress will rapidly accelerate wear.
- Replace the swing circle when the internal clearance exceeds the manufacturer’s maximum allowable limit.
- During track or undercarriage maintenance, inspect the swing circle internal gear teeth for chipping or uneven wear.
Warranty
This KOMATSU Swing Circle is covered by a 12 months warranty against manufacturing defects in materials and workmanship. The warranty covers replacement or repair of the unit at our discretion. Proper installation by a qualified technician and adherence to the recommended maintenance schedule are required for warranty validity. The warranty does not cover damage caused by improper installation, misuse, contamination, or unauthorized modifications.
Shipping and Delivery
In-stock items ship within 24-48 hours via express freight (DHL, FedEx, or UPS). Standard delivery time is 5-10 business days worldwide. Expedited shipping options are available upon request. All shipments are fully insured and include tracking information.
Why Choose Our Swing Circle?
- Direct OEM replacement – no modifications required for installation
- Rigorous quality testing before shipment, including pressure testing and dimensional inspection
- Competitive pricing with factory-direct supply chain
- Technical support available for installation and troubleshooting
- Proven reliability with thousands of units sold worldwide
