4DW91-56G2 Piston Ring Set for Diesel Engine Repair – Construction, Agriculture, Marine

Product Details

Product Overview

This high-performance piston ring set, identified by the model number 4DW91-56G2, is a critical component for diesel engine repair and overhaul. Manufactured to OEM size specifications, this ring set is designed to restore compression, reduce oil consumption, and maximize engine efficiency. It is a precision-engineered solution for machinery operating in demanding environments.

While the specific engine application is inferred from the part number, the 4DW91-56G2 piston ring is commonly utilized in a wide range of industrial, agricultural, and marine diesel engines. This product is an ideal replacement part for maintenance and repair, ensuring your equipment returns to peak operational performance.

Key Features & Benefits

• Precision Engineering: Manufactured to strict OEM size tolerances, ensuring a perfect seal and optimal compression within the cylinder.
• Durable Material: Constructed from high-grade, wear-resistant materials to withstand high temperatures and pressures found in diesel combustion.
• Reduced Oil Consumption: The specific ring profile helps control oil film thickness on the cylinder wall, minimizing oil consumption and blow-by.
• Enhanced Engine Life: By maintaining proper compression and reducing friction, this ring set contributes to a longer engine service life and reduced downtime.
• Versatile Application: Suitable for a broad spectrum of machinery, including construction equipment, agricultural tractors, generators, marine engines, and material handling vehicles.
• Complete Set: Includes all necessary rings (compression, wiper, and oil rings) for a single cylinder, simplifying the repair process.

Technical Specifications

OEM Cross-Reference

This piston ring set is designed to replace or correspond to the following OEM part numbers:

• 4DW91-56G2 (Primary Part Number)

Note: This part is a direct replacement for the original factory specification. For specific cross-references to other manufacturer numbers (e.g., Caterpillar, Komatsu, Cummins), please consult with our technical team using your OEM part number.

Compatibility

This piston ring set is commonly used for the following applications:

• Engine Models: 4DW91 series diesel engines.
• Equipment Types: Construction machinery (excavators, loaders), agricultural equipment (tractors, harvesters), industrial generators, marine propulsion systems, and material handling equipment (forklifts).

Fitment is inferred based on the part number. Always verify compatibility with your specific engine model and serial number before purchase.

Global Supply & Distribution

We specialize in the global export of high-quality engine components. Our supply chain is optimized for fast and reliable delivery to major industrial centers worldwide.

• Markets Served: North America, Europe, Southeast Asia, Middle East, Africa, and South America.
• Shipping: We offer various shipping options, including sea freight (FOB/CIF) to major ports and express air freight for urgent orders.
• Logistics: Strong partnerships with leading logistics providers ensure your parts arrive safely and on time. We provide full tracking and documentation.
• Compliance: All products are exported with full commercial invoices, packing lists, and certificates of origin as required.

Quality Assurance

Quality is our top priority. Every piston ring set is manufactured under strict quality control processes.

• Manufacturing Standards: Produced in ISO-certified facilities using advanced metallurgy and machining technology.
• Testing: Each batch undergoes rigorous inspection, including dimensional checks and material composition analysis. A Machinery Test Report is available upon request.
• Warranty: We provide a 6-month warranty against manufacturing defects, giving you peace of mind for your repair project.
• Inspection: We offer Video Outgoing Inspection services to validate the product before shipment.

FAQ

Q1: How do I confirm this piston ring set fits my engine?

Please verify your engine’s model number and the cylinder bore size. This set is specifically designed for the 4DW91-56G2 specification. If your engine is a 4DW91 series, it is highly likely to be compatible. For absolute certainty, compare the OEM part number or provide us with your engine serial number for cross-verification.

Q2: What is the installation procedure for these rings?

Installation should be performed by a qualified diesel mechanic. Standard procedures include: 1) Cleaning the cylinder bore and piston grooves. 2) Checking ring end-gap in the cylinder bore. 3) Using a ring expander tool to install rings from bottom to top (oil ring first). 4) Staggering the ring end gaps around the piston to prevent blow-by. Always refer to the engine manufacturer’s service manual.

Q3: What maintenance is recommended after installing new piston rings?

After installation, a proper engine break-in period is crucial. Follow the manufacturer’s guidelines, typically involving a period of light to moderate load operation to allow the rings to seat correctly against the cylinder wall. Use high-quality engine oil and follow recommended oil change intervals to maximize the life of the new rings.