6D125 SAA6D125E Main & Connecting Rod Bearing Set 6150-21-8010 6150-39-3040 for Komatsu Diesel

Product Details

Product Overview

This high-precision bearing set is specifically designed for the Komatsu 6D125 and SAA6D125E diesel engine platforms. The set includes both main crankshaft bearings (Part No. 6150-21-8010) and connecting rod bearings (Part No. 6150-39-3040), providing a complete solution for engine rebuilds and overhauls.

Manufactured to original equipment (OEM) specifications, these bearings ensure the tight tolerances required for heavy-duty operation in construction and industrial machinery. While primarily associated with Komatsu engines, these components are commonly used in a range of equipment including excavators, bulldozers, loaders, and trucks that utilize the 6D125 or SAA6D125E power units.

Each bearing is precision-ground and tri-metal layered to withstand high loads and temperatures, ensuring a reliable oil film and long service life. This set is an ideal choice for workshops and parts distributors seeking a cost-effective, high-quality alternative to genuine OEM parts.

Key Features & Benefits

• OEM Specification Fitment: Manufactured to match the exact dimensions and tolerances of the original Komatsu parts (6150-21-8010 & 6150-39-3040), ensuring a direct, hassle-free installation.
• Tri-Metal Construction: Features a steel back for strength, a copper-lead intermediate layer for fatigue resistance, and a lead-tin overlay for excellent anti-friction properties and emergency running characteristics.
• Complete Bearing Set: Includes both main bearings and connecting rod bearings in one package, simplifying inventory management and ensuring component compatibility during an engine rebuild.
• Enhanced Durability: Designed to handle the high cylinder pressures and rotational speeds of turbocharged diesel engines, reducing the risk of bearing seizure or premature wear.
• Rigorous Quality Control: Each batch undergoes machinery test reports and video outgoing inspections to verify dimensional accuracy and surface finish.
• Cost-Effective Solution: Offers significant savings compared to genuine Komatsu branded parts without compromising on performance or reliability.

Technical Specifications

OEM Cross-Reference

These bearings are direct replacements for the following original Komatsu part numbers. Please verify your existing part number before ordering.

• Main Bearing:6150-21-8010
• Connecting Rod Bearing:6150-39-3040

Note: These are the specific OEM numbers listed. For other potential cross-references, please consult your engine service manual or contact our technical support team.

Compatibility

Engine Models:

• Komatsu 6D125
• Komatsu SAA6D125E

Common Applications (Inferred Fitment):

• Excavators
• Bulldozers
• Loaders
• Forklifts
• Dump Trucks
• Buses
• Industrial Power Units

Please verify your specific engine model and application to ensure compatibility. These bearings are commonly used for engine overhauls in heavy construction and mining equipment.

Global Supply & Distribution

We provide efficient worldwide shipping for this 6D125 bearing set, serving B2B clients across key industrial markets.

• Major Markets: North America (USA, Canada, Mexico), Europe (Germany, UK, Netherlands, France), Asia-Pacific (Japan, Australia, Singapore, Indonesia), Middle East (UAE, Saudi Arabia, Qatar), Africa (South Africa, Nigeria, Kenya), and South America (Brazil, Chile, Peru).
• Fast Delivery: Stock is held in our main distribution hub in Guangdong, China, allowing for rapid dispatch to major international ports such as Shanghai, Shenzhen, and Hong Kong.
• Shipping Options: We offer express courier (DHL, FedEx, UPS) for urgent orders, air freight for medium-sized shipments, and sea freight for bulk container orders to minimize your landed cost.
• Trade Compliance: Our export team is experienced in handling international documentation, including commercial invoices, packing lists, and certificates of origin, ensuring smooth customs clearance.

Quality Assurance

We are committed to delivering parts that meet or exceed original equipment standards.

• Manufacturing Standards: Produced in ISO-certified facilities using precision machining and strict quality control processes.
• Testing: Each batch is subject to a Machinery Test Report and Video Outgoing Inspection to validate dimensional accuracy and material composition.
• Warranty: All bearings are backed by a 6-month warranty against manufacturing defects. Claims are processed promptly to ensure customer satisfaction.
• OEM Service: We offer OEM/ODM services for clients requiring custom packaging or private labeling.

FAQ

Q1: How do I confirm if these bearings are the correct size for my 6D125 engine?

A: These bearings are manufactured to the standard OEM size. To confirm fitment, you should first check the part numbers stamped on your existing bearings. The main bearing should read 6150-21-8010 and the rod bearing 6150-39-3040. If your bearings have been previously machined (e.g., 0.25mm or 0.50mm undersize), this standard set will not fit. Always measure your crankshaft journal diameters against the service manual specifications before installation.

Q2: What is the correct installation procedure for these bearings?

A: Installation should be performed by a qualified diesel mechanic. Key steps include: 1) Thoroughly clean the bearing housing and crankshaft journals. 2) Ensure the bearing shells are dry and free from debris. 3) Do NOT apply grease to the bearing back; the shells must sit flush against the housing for proper heat transfer. 4) Apply clean engine oil to the bearing surface. 5) Torque the main cap and rod cap bolts to the exact specifications in the Komatsu service manual for the SAA6D125E engine. 6) After assembly, rotate the crankshaft by hand to check for binding.

Q3: What is the expected lifespan of these bearings under normal operating conditions?

A: The lifespan depends heavily on maintenance practices, oil quality, and engine load. Under normal conditions with regular oil and filter changes using the correct API-rated diesel engine oil, these bearings can last for several thousand operating hours. Key factors for longevity include maintaining proper oil pressure, avoiding engine overheating, and not exceeding the engine’s rated load. We recommend replacing bearings during any major engine overhaul to prevent unexpected failure.