D4DA M113A3 R113A Main Crankshaft Bearing & Connecting Rod Bearing 21020-45920 for Hyundai Engine

Product Details

Product Overview

This heavy-duty engine component set includes the main crankshaft bearing and connecting rod bearing, specifically designed for the Hyundai D4DA diesel engine. The bearings are identified by the OEM reference numbers M113A3 (Main Bearing) and R113A (Connecting Rod Bearing), along with the Hyundai part number 21020-45920.

Manufactured to original equipment (OEM) size standards, these bearings are critical for maintaining precise crankshaft clearance and ensuring the longevity of your engine’s rotating assembly. They are commonly used in a variety of heavy machinery applications, including excavators, forklifts, loaders, and trucks, where reliable engine performance is essential for demanding work cycles.

Each bearing set is produced using high-quality materials and precision engineering to withstand the high loads and temperatures typical of diesel engine operation. This product is ideal for both routine engine overhauls and emergency repairs, providing a direct replacement for worn or damaged components.

Key Features & Benefits

• OEM Specification Fitment: Manufactured to match the exact size and tolerance of the original Hyundai part (21020-45920), ensuring a precise fit without modification.
• High Durability: Constructed from a robust steel-backed alloy with a specialized bearing lining to resist wear, fatigue, and seizure under high-load conditions.
• Improved Oil Film Retention: The bearing surface is designed to maintain a consistent oil film, reducing friction and heat buildup for extended engine life.
• Complete Kit: Includes both main bearings (M113A3) and connecting rod bearings (R113A) in one convenient package, saving time on parts sourcing.
• Rigorous Quality Control: Each bearing undergoes dimensional and material inspections to guarantee reliability and performance in the field.
• Versatile Application: Suitable for a wide range of heavy equipment, including excavators, bulldozers, and buses, making it a stock-friendly part for repair shops.
• Cost-Effective Solution: Provides a reliable aftermarket alternative to expensive dealer parts without compromising on quality or performance.

Technical Specifications

OEM Cross-Reference

This bearing set is a direct cross-reference for the following Hyundai genuine part numbers and industry standard codes:

• Hyundai: 21020-45920
• Main Bearing: M113A3
• Connecting Rod Bearing: R113A

Note: Always verify the part number on your original bearing or engine block before ordering to ensure correct fitment.

Compatibility

This engine bearing set is specifically designed for the Hyundai D4DA diesel engine. It is commonly used for maintenance and overhaul in the following types of equipment:

• Excavators: Hyundai R55, R60, R80 series
• Forklifts: Various models powered by the D4DA engine
• Loaders & Bulldozers: Compact and mid-size construction machines
• Trucks & Buses: Light to medium commercial vehicles

Disclaimer: This is an aftermarket replacement part. While designed to match OEM specifications, compatibility should be confirmed against your specific vehicle or equipment model.

Global Supply & Distribution

We supply this D4DA bearing set to B2B buyers worldwide, supporting engine rebuilders, parts distributors, and heavy equipment workshops. Our logistics network ensures efficient delivery to major ports and industrial centers across:

• North America: Los Angeles, Houston, New York, Toronto, Vancouver
• Europe: Rotterdam, Hamburg, Antwerp, Felixstowe
• Asia-Pacific: Singapore, Shanghai, Busan, Sydney, Dubai
• Middle East & Africa: Jebel Ali, Dammam, Durban, Lagos

We offer flexible shipping options including express courier (DHL, FedEx) for urgent orders and sea freight for bulk quantities. Our export team handles all necessary customs documentation and international trade compliance to ensure a smooth transaction.

Quality Assurance

• Manufacturing Standards: Produced in ISO 9001 certified facilities with strict adherence to OEM dimensional tolerances.
• Inspection: Each batch undergoes a Machinery Test Report and Video Outgoing Inspection to verify quality before shipment.
• Warranty: Covered by a 6-month warranty against manufacturing defects. Claims are processed promptly for any non-conforming parts.
• Material Integrity: Bearings are tested for hardness, crush strength, and fatigue resistance to ensure they meet heavy-duty diesel requirements.

FAQ

Q: How do I confirm these bearings fit my D4DA engine?
A: The most reliable method is to check the part number stamped on your old bearing (M113A3 for main, R113A for rod) or your engine block. Cross-reference this with the Hyundai number 21020-45920. If your engine is a standard D4DA without modifications, these OEM-size bearings will fit.

Q: Can I install these bearings without removing the crankshaft?
A: Main bearings require the crankshaft to be removed for proper replacement. Connecting rod bearings can sometimes be replaced through the oil pan with the crankshaft in place, but professional shop tools and accurate torque specs are essential. We recommend installation by a qualified diesel mechanic to avoid damage.

Q: What is the recommended oil clearance for these bearings?
A: For standard OEM size D4DA bearings, the typical oil clearance is between 0.03mm to 0.08mm for main bearings and 0.04mm to 0.09mm for rod bearings. Always use a plastigauge to measure clearance during assembly and refer to the Hyundai service manual for exact tolerances. Use a high-quality 15W-40 or 10W-30 diesel engine oil for break-in.