129931-22100 Engine Piston Assembly 94mm Bore 99mm Height For Yanmar 4TNE94 4D94 4D94E 4D94LE

Product Details

Product Overview

This professional-grade engine piston assembly, OEM reference 129931-22100 (also known as YM129931-22100), is a direct replacement component designed for the Yanmar 4TNE94, 4D94, 4D94E, and 4D94LE diesel engine series. Manufactured to strict dimensional tolerances, this piston features a standard (STD) bore diameter of 94.00 mm and a total height of 99.00 mm, making it an ideal solution for engine overhauls or rebuilds.

Commonly used in industrial machinery, this piston assembly is a critical part for maintaining compression and power output in forklifts, excavators, tractors, and other heavy equipment. The part is designed to match the original Yanmar specifications, ensuring reliable performance and a proper fit within the engine cylinder block.

Key Features & Benefits

• Precision Engineering: Manufactured with a 94.00mm STD bore diameter and 99.00mm total height to meet exact OEM specifications for Yanmar 4TNE94 and 4D94 series engines.
• Complete Assembly: Includes the piston and piston pin (30.0mm x 73.0mm), providing all necessary components for a straightforward installation.
• High Durability: Constructed from high-strength materials to withstand the extreme pressures and temperatures of diesel combustion, ensuring a long service life.
• Fit Confidence: Verified cross-reference to OEM part numbers 129931-22100 and YM129931-22100, eliminating guesswork for maintenance professionals.
• Versatile Application: Suitable for a wide range of industrial equipment including forklifts, excavators, and tractors powered by the specified Yanmar engine models.

Technical Specifications

OEM Cross-Reference

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

• 129931-22100 (Yanmar)
• YM129931-22100 (Yanmar)

Note: Always verify the physical dimensions of your original part against the specifications provided to ensure compatibility.

Compatibility

This piston assembly is commonly used for the following engine models and applications:

• Engine Models: Yanmar 4TNE94, 4D94, 4D94E, 4D94LE
• Vehicle/Equipment Applications: Forklifts, Excavators, Tractors, and other industrial machinery utilizing these engine types.

Fitment is inferred based on engine model matching. Please confirm your specific engine model and piston dimensions before purchase.

Global Supply & Distribution

We specialize in the global supply of heavy machinery and engine parts. Our distribution network ensures fast and reliable shipping to major industrial markets worldwide, including:

• North America: USA, Canada, Mexico
• Europe: Germany, UK, Netherlands, France, Italy, Spain
• Asia-Pacific: Japan, South Korea, Australia, Singapore, China
• Middle East & Africa: UAE, Saudi Arabia, South Africa, Nigeria
• South America: Brazil, Chile, Argentina, Colombia

We offer flexible logistics options including sea freight (FCL/LCL), air freight, and express courier services (DHL, FedEx, UPS) to major ports and industrial centers. Our export team ensures all documentation is compliant with international trade regulations for a smooth customs clearance process.

Quality Assurance

Our manufacturing process adheres to strict quality control standards. Each piston assembly undergoes rigorous inspection to ensure dimensional accuracy and material integrity.

• Testing: Machinery Test Report and Video Outgoing Inspection are provided upon request to verify quality before shipment.
• Warranty: This product is backed by a standard 6-month warranty against manufacturing defects, with extended 1-year options available upon request.
• Standards: Production follows industry-standard specifications to ensure reliable performance in demanding diesel engine environments.

FAQ

Q: How do I confirm this piston will fit my engine?
A: First, verify your engine model (e.g., 4TNE94, 4D94). Then, check your current piston’s bore diameter (should be 94.00mm for STD) and total height (99.00mm). If these dimensions and the OEM part number (129931-22100) match, this piston is the correct replacement. If your engine has been rebored, you may need an oversized piston.

Q: What is included in the “piston assembly”?
A: The assembly includes the piston itself and the piston pin (wrist pin), which measures 30.0mm in diameter and 73.0mm in length. Piston rings are not included in this standard assembly and should be ordered separately if needed.

Q: What is the recommended installation procedure?
A: Installation should be performed by a qualified diesel mechanic. Ensure the cylinder bore is clean and within specification. Lubricate the piston pin and cylinder walls with clean engine oil during assembly. Use a piston ring compressor to install the piston into the bore, taking care not to damage the rings or piston skirt. Always follow the Yanmar service manual for specific torque values and procedures.