Excavator 6UZ1 Main Bearing M4450 Daido Bearing – Genuine Japan Part

Product Details

Product Overview

This high-quality main bearing, specifically the Daido M4450, is a genuine component designed for use in the Isuzu 6UZ1 diesel engine, commonly found in heavy excavators. As a critical rotating part, this bearing ensures the precise and stable support of the crankshaft within the engine block.

Sourced from Japan, this bearing is manufactured to the original equipment specifications (OEM) for the 6UZ1 model. It is a direct replacement for machinery requiring this specific part number, offering the durability and reliability needed for demanding construction and earthmoving applications. Please verify your engine model (6UZ1) and part number (M4450) before purchasing to ensure correct fitment.

Key Features & Benefits

• Genuine Daido Quality: This is a genuine Daido bearing, a trusted OEM supplier known for precision engineering and long-lasting performance in Japanese engines.
• Precise Fit for 6UZ1: Specifically manufactured for the Isuzu 6UZ1 engine, ensuring the correct clearance and oil clearance for optimal crankshaft support.
• Long-Lasting Durability: Built to withstand high loads and extreme operating conditions typical of excavator engines, reducing downtime and replacement frequency.
• Direct Replacement: Exact part number M4450 allows for a straightforward swap, simplifying your engine rebuild process.
• Japanese Manufacturing: Sourced from Japan, providing confidence in material quality and manufacturing tolerances.
• Reduced Engine Vibration: Proper main bearing support minimizes crankshaft flex and vibration, contributing to smoother engine operation and longer engine life.

Technical Specifications

OEM Cross-Reference

This bearing is a direct OEM replacement for the following part numbers:

• Daido: M4450
• Isuzu: Check your engine manual for the specific Isuzu OEM number for the 6UZ1 main bearing set. This Daido part is the OEM manufacturer for many Japanese engine lines.

This part is commonly used as a standard replacement in engine overhaul kits for the Isuzu 6UZ1. If you are ordering a full bearing set, please confirm that the set includes the M4450 main bearing.

Compatibility

This main bearing (M4450) is commonly used for the following applications:

• Engine: Isuzu 6UZ1
• Equipment: Excavators (e.g., Hitachi ZX330, ZX350, ZX400 series; Sumitomo SH350; and other heavy machinery utilizing the 6UZ1 engine).

Note: Fitment is inferred based on the engine model. Always verify the engine model (6UZ1) and the specific bearing part number (M4450) against your machine’s parts manual before ordering.

Global Supply & Distribution

We provide worldwide shipping for this genuine Daido M4450 main bearing. Our logistics network ensures fast and reliable delivery to major industrial centers and ports across the globe.

• Major Markets Served: North America, Europe (EU), Southeast Asia, Middle East, Africa, and Oceania.
• Fast Shipping: Orders are dispatched promptly upon payment receipt, with delivery to major ports (e.g., Los Angeles, Rotterdam, Dubai, Singapore) typically within 5-10 business days.
• International Compliance: We adhere to international trade standards, providing proper documentation for customs clearance.

Quality Assurance

This bearing is a genuine Daido product sourced directly from Japan. Daido is a leading OEM bearing manufacturer known for its strict quality control and adherence to ISO standards.

• Manufacturing Standard: Original Equipment (OEM) specification.
• Testing: Each bearing undergoes rigorous dimensional and material testing to ensure it meets the precise tolerances required for the 6UZ1 engine.
• Warranty: We offer a 3-month warranty against manufacturing defects. After-warranty service includes video technical support to assist with installation verification.

FAQ

Q: Is this a full set of main bearings or just one bearing?
A: This listing is for a single main bearing with the part number M4450. For a complete engine rebuild, you may need multiple shells (upper and lower) and other bearings (rod bearings, thrust washers). Please verify the quantity you need for your specific engine application.

Q: How do I confirm this bearing fits my excavator?
A: You must confirm your engine model is an Isuzu 6UZ1. Additionally, check the existing bearing in your engine or your parts manual for the part number M4450. If both match, this bearing is the correct component.

Q: What is the recommended installation procedure for main bearings?
A: Installation should be performed by a qualified diesel mechanic. Key steps include: 1) Thoroughly cleaning the bearing bore and crankshaft journal. 2) Checking oil clearance using Plastigage to ensure it is within the 6UZ1 service specifications. 3) Applying clean engine oil to the bearing surface before assembly. 4) Torquing the main bearing cap bolts to the manufacturer’s specified torque and angle. Improper installation can lead to engine failure.