4D95 B3.3 Connecting Rod 6204-31-3101 4993823 for Komatsu Excavator Engine Parts

Product Details

Product Overview

This heavy-duty connecting rod, identified by part numbers 6204-31-3101 and 4993823, is a critical engine component designed for the Komatsu 4D95 and B3.3 series diesel engines. Manufactured to meet OEM specifications, this connecting rod ensures precise fitment and reliable performance in demanding applications such as excavators, bulldozers, and other heavy construction equipment.

As a key element of the engine’s bottom-end assembly, this rod is forged from high-strength alloy steel to withstand extreme combustion pressures and high rotational speeds. It serves as a direct replacement for worn or damaged original equipment parts, helping to restore engine compression and power output. This part is suitable for a wide range of Komatsu machinery commonly found in mining, construction, and industrial operations globally.

Key Features & Benefits

• OEM Reference Fitment: Engineered to match the exact dimensions and weight of the original Komatsu 6204-31-3101 and 4993823 parts, ensuring a proper balance and clearances without modification.
• High-Strength Forging: Manufactured from premium alloy steel through a forging process, providing superior fatigue resistance and structural integrity under heavy loads.
• Precision Machining: Finished with tight tolerances on the big end and small end bores to ensure optimal bearing fit and wrist pin alignment, reducing friction and wear.
• Direct Replacement: Designed as a direct drop-in replacement for 4D95 and B3.3 series engines, minimizing downtime during engine overhauls or rebuilds.
• Rigorous Quality Control: Each connecting rod undergoes inspection for dimensional accuracy, material hardness, and surface finish to meet industry standards.
• Versatile Application: Suitable for a range of Komatsu machinery, including excavators, loaders, and forklifts, making it a practical stock item for equipment fleets.

Technical Specifications

OEM Cross-Reference

This connecting rod is a direct replacement for the following original equipment manufacturer (OEM) part numbers:

• Komatsu OEM: 6204-31-3101
• Komatsu OEM: 4993823

These numbers correspond to the connecting rod assembly used in Komatsu 4D95 and B3.3 series engines. If your engine block or parts manual lists either of these numbers, this component is the correct replacement.

Compatibility

This connecting rod is commonly used for the following engine platforms and machinery. Please verify your specific engine model and serial number to confirm compatibility.

• Engine Models: Komatsu 4D95, Komatsu B3.3
• Vehicle/Equipment Applications: Excavators, Bulldozers, Forklifts, Wheel Loaders, Trucks, and Buses powered by the above engine models.

Note: This part is commonly sought for Komatsu PC series excavators and WA series loaders equipped with the 4D95 or B3.3 engine.

Global Supply & Distribution

We provide efficient worldwide shipping to support international B2B buyers. Our logistics network covers major industrial markets, ensuring timely delivery to your warehouse or project site.

• Markets Served: North America, Europe (EU), Southeast Asia, Middle East, Africa, and Oceania.
• Shipping Hubs: Fast delivery to major ports including Shanghai, Shenzhen, Guangzhou, and Hong Kong for sea freight, as well as air freight options to international airports.
• Export Experience: We specialize in exporting heavy machinery parts and understand the documentation required for smooth customs clearance, including commercial invoices, packing lists, and certificates of origin.
• Bulk Orders: We welcome wholesale and bulk orders for fleet maintenance and parts distributors. Contact us for volume pricing and lead times.

Quality Assurance

We are committed to delivering reliable engine components that meet the demands of professional operators.

• Manufacturing Standard: Parts are produced to match or exceed OEM specifications for material, hardness, and dimensional accuracy.
• Certification: Our manufacturing partners adhere to ISO quality management standards.
• Inspection: Each batch undergoes outgoing inspection. Video inspection and machinery test reports are available upon request to verify quality before shipment.
• Warranty: This product is backed by a 6-month warranty against manufacturing defects in material and workmanship.

FAQ

Q: How can I confirm this connecting rod fits my Komatsu B3.3 engine?
A: First, check your engine’s serial number plate. If the engine model is listed as 4D95 or B3.3, this rod is likely correct. For absolute certainty, cross-reference your old part number with the OEM numbers listed here (6204-31-3101 or 4993823). If your old rod is marked with either number, it is a direct match.

Q: What is the recommended installation procedure for this connecting rod?
A: Installation should be performed by a qualified diesel mechanic. Always measure the big end bore diameter and check for proper bearing crush. Torque the connecting rod bolts to the factory specification for your specific Komatsu engine model using a calibrated torque wrench. It is critical to replace the connecting rod bolts and nuts with new ones during reassembly, as they are torque-to-yield fasteners.

Q: What is the expected service life of this aftermarket connecting rod?
A: The lifespan depends on operating conditions, maintenance schedules, and engine loads. When properly installed with correct clearances and using quality lubricants, this forged connecting rod is designed to provide a long service life comparable to the original OEM part. Regular oil changes and avoiding engine over-revving will help maximize its durability.