Genuine Excavator Engine Piston 3906223 For 4BT3.9 6BT5.9 Diesel Generator Parts

Product Details

Product Overview

This listing offers a genuine / piston, part number 3906223, specifically designed for the popular 4BT3.9 and 6BT5.9 diesel engine platforms. While commonly associated with excavator applications, this piston is a critical component for a variety of industrial equipment, including generator sets, trucks, ships, and other heavy machinery.

Manufactured by or its joint venture Chongqing Engine Co. (), this piston ensures original equipment quality and precise dimensional tolerances. It is an ideal replacement part for engine overhauls or rebuilds where maintaining factory performance and reliability is paramount. Please verify your specific engine model and serial number to confirm fitment before purchasing.

Key Features & Benefits

• Genuine OEM Quality: This is a genuine / part, not an aftermarket copy, ensuring a perfect fit, long service life, and consistent performance.
• Precise Engineering: Manufactured to exact specifications for the 4BT3.9 and 6BT5.9 engine families, guaranteeing proper ring groove alignment and pin bore location.
• High-Durability Material: Constructed from high-strength aluminum alloy to withstand extreme combustion pressures and temperatures common in diesel generator and heavy equipment operation.
• Direct Replacement: Part number 3906223 is the direct OE replacement, simplifying the ordering process and eliminating guesswork for mechanics and parts managers.
• Versatile Application: Suitable for a wide range of equipment beyond excavators, including generator sets, marine engines, industrial pumps, and agricultural machinery powered by the B3.9 or B5.9 engine.
• Competitive Pricing for Volume: Large stock is available, with significant discounts for bulk orders, making this an economical choice for fleet maintenance and repair shops.

Technical Specifications

OEM Cross-Reference

This piston carries the OEM part number 3906223. It is a direct replacement for the original equipment pistons used in the following engine series:

• / 4BT3.9 Engines
• / 6BT5.9 Engines

Note: Always cross-reference your engine’s serial number and existing piston part number to ensure compatibility. While 3906223 is a standard part for these engine families, variations may exist in different production years or applications.

Compatibility

This piston is commonly used for the following engine and equipment types:

• Engine Models: 4BT3.9, 6BT5.9 (B-Series)
• Applications: Excavators, Generator Sets, Marine Engines, Trucks, Industrial Pumps, Agricultural Equipment.

Important Fitment Note: The 4BT3.9 and 6BT5.9 engines are widely used across many OEM manufacturers. Please verify that your equipment is powered by one of these specific engine models before ordering.

Global Supply & Distribution

We are a professional supplier based in Chongqing, China, with extensive experience in exporting genuine engine parts to international markets. We offer worldwide shipping solutions tailored to your needs:

• Major Markets Served: North America (USA, Canada, Mexico), Europe (EU, UK), Asia-Pacific (Australia, Singapore, Middle East), South America, and Africa.
• Shipping Options: Express (DHL, FedEx, UPS), Air Freight, and Sea Freight (FCL/LCL) are available. We can deliver to major ports like Shanghai, Shenzhen, and directly to your nearest international airport.
• Fast Delivery: For stock items, orders are processed within 24 hours of payment. We can coordinate logistics to meet urgent project timelines.
• Trade Compliance: We adhere to international export regulations and can provide necessary documentation for customs clearance.

Quality Assurance

Manufacturing Standard: This piston is manufactured in a Cummins-licensed facility, adhering to strict OEM quality control standards. It is a genuine part, not a generic replacement.

Warranty: Each piston comes with a minimum one-year warranty against manufacturing defects. Our warranty policy provides peace of mind for your engine rebuild project.

Testing & Inspection: While a formal machinery test report is not provided for individual pistons, outgoing quality inspection is conducted. A video inspection of the goods can be provided upon request to verify part numbers and physical condition before shipping.

FAQ

Q1: How do I confirm this piston (3906223) fits my engine?
A: Please check your engine’s data plate for the model number (e.g., 4BT3.9-G2 or 6BT5.9-C). Also, remove an existing piston and look for the part number stamped on it. If it matches 3906223 or your engine is a standard B3.9/B5.9, this piston is the correct part. If you are unsure, please contact us with your engine serial number (ESN) for verification.

Q2: Does this piston come with piston rings and a pin?
A: This listing is for the piston body only (part 3906223). Piston rings and the wrist pin are typically ordered separately using their own specific part numbers (e.g., 3803313 for ring set). We recommend purchasing a complete piston & ring set for a proper rebuild. Please contact us for a full kit quote.

Q3: What is the standard size of this piston? Are oversize versions available?
A: This part number (3906223) typically represents the standard (std) size piston for the 4BT3.9 and 6BT5.9 engines. Oversize pistons (e.g., 0.50mm or 1.00mm) have different part numbers. If you need an oversize piston for a re-bored cylinder, please contact our sales team with the required oversize specification to ensure you receive the correct part.