6RB1 Main Bearing 0.25 Oversize for Isuzu Diesel Engine Parts Excavator Forklift

Product Details

Product Overview

This high-precision 6RB1 Main Bearing (0.25 oversize) is an essential component for maintaining the integrity and performance of Isuzu diesel engines. Designed for heavy-duty applications, this bearing is commonly utilized in industrial equipment such as excavators, forklifts, loaders, bulldozers, trucks, and buses.

Manufactured under strict quality controls by, this main bearing is engineered to meet OEM specifications, ensuring a reliable fit and optimal engine function. The 0.25 oversize designation indicates it is intended for use during engine rebuilds where the crankshaft journal has been ground down to the first undersize, restoring proper clearances and oil pressure.

Key Features & Benefits

• Precision Engineering: Manufactured to exact OEM size specifications (0.25mm oversize) for a precise fit with reground crankshafts.
• Durable Construction: Built from high-strength, wear-resistant materials designed to withstand the high loads and temperatures of Isuzu diesel engines.
• Restored Engine Performance: Replaces worn bearings to reduce crankshaft play, improve oil pressure, and eliminate knocking noises.
• Direct Fit for 6RB1: Specifically machined for the Isuzu 6RB1 engine model, ensuring correct width, thickness, and oil clearance.
• Versatile Application: Suitable for a wide range of heavy equipment including construction machinery, agricultural tractors, and commercial vehicles.
• Reliable Supply: Backed by a 6-month warranty and rigorous quality inspection processes.

Technical Specifications

OEM Cross-Reference

This 6RB1 main bearing is manufactured as a direct replacement for the original Isuzu components. While specific OEM part numbers for the 6RB1 main bearing set may vary by engine serial number and configuration, this product is designed to match the dimensional and material specifications of genuine Isuzu parts.

Commonly referenced OEM applications include:

• Isuzu 6RB1 Engine (Standard & 0.25 Oversize)
• Fits E120, E160, and similar series excavators

Note: For exact OEM number cross-referencing, please verify the original part number from your engine’s service manual or consult with your parts supplier.

Compatibility

This main bearing is specifically designed for the Isuzu 6RB1 diesel engine. Based on industry standard applications, this engine model is commonly used in the following equipment:

• Excavators: Various models from Hitachi, Sumitomo, and others utilizing the Isuzu 6RB1 engine.
• Forklifts: Heavy-duty industrial forklifts.
• Loaders & Bulldozers: Construction and earthmoving machinery.
• Trucks & Buses: Commercial vehicles requiring a robust inline 6-cylinder diesel engine.

Important: Always confirm the engine model (6RB1) and the required bearing size (0.25 OS) before purchasing to ensure proper fitment.

Global Supply & Distribution

We provide reliable worldwide shipping for this Isuzu 6RB1 main bearing, ensuring fast delivery to major ports and industrial centers across the globe. Our logistics network supports:

• North America: Quick shipping to the USA, Canada, and Mexico for construction and trucking fleets.
• Europe: Efficient delivery to the UK, Germany, France, and Eastern European markets.
• Asia-Pacific: Fast supply to Japan, Korea, Australia, and Southeast Asian countries where Isuzu engines are prevalent.
• Middle East & Africa: Reliable shipping for mining, oil & gas, and construction sectors.

With extensive export experience and international trade compliance, we ensure your order is processed quickly and securely, whether for single engine rebuilds or bulk workshop orders.

Quality Assurance

At, quality is our priority. Each 6RB1 main bearing undergoes rigorous inspection to ensure it meets or exceeds OEM standards.

• Manufacturing Standards: Produced in ISO-compliant facilities in Guangdong, China.
• Testing: Machinery Test Reports are available to verify dimensional accuracy and material hardness.
• Inspection: Video Outgoing Inspection can be provided for order verification.
• Warranty: We stand behind our products with a 6-month warranty against manufacturing defects.

This commitment ensures that your engine rebuild is completed with components you can trust for long service life.

FAQ

Q: How do I know if I need a 0.25 oversize main bearing for my Isuzu 6RB1 engine?
A: The 0.25 oversize bearing is used when the crankshaft main bearing journals have been ground down by 0.25mm during an engine rebuild. You should measure the journal diameter with a micrometer. If it is 0.25mm smaller than the standard specification, this bearing is the correct size. Always consult with your engine machinist before ordering.

Q: Can this bearing be installed without removing the engine from the equipment?
A: While it is possible to replace main bearings with the engine in the chassis on some large equipment, it is highly recommended to remove the engine and crankshaft for a proper rebuild. This allows for accurate cleaning, inspection of the crankshaft journals, and proper torqueing of the main bearing caps. For best results, we recommend a full engine overhaul by a qualified diesel mechanic.

Q: What is the typical lifespan of this 6RB1 main bearing after installation?
A: The lifespan depends heavily on engine maintenance, oil quality, and operating conditions. When installed correctly with proper oil clearances and using high-quality engine oil, this bearing can last for thousands of hours. Regular oil changes and maintaining proper oil pressure are critical to maximizing bearing life. Our 6-month warranty covers manufacturing defects, but proper installation is key to long-term performance.