3D78 3TNC78 Cylinder Liner for Yanmar Engine Parts | Excavator & Diesel Engine

Product Details

Product Overview

This high-quality cylinder liner is specifically designed for Yanmar diesel engines, model 3D78 and 3TNC78. As a critical component of the engine block, the cylinder liner provides a durable, wear-resistant surface for the piston to travel within, ensuring optimal compression, combustion efficiency, and long-term engine reliability.

Manufactured to OEM specifications, this replacement liner is suitable for a wide range of heavy-duty equipment, including excavators, forklifts, bulldozers, trucks, buses, and loaders. It is an ideal choice for maintenance workshops, equipment dealers, and fleet operators seeking a direct-fit, cost-effective solution for Yanmar-powered machinery.

Each liner is precision-engineered to strict tolerances, offering a reliable alternative to genuine Yanmar parts without compromising on performance or longevity.

Key Features & Benefits

• OEM Specification Fit: Manufactured to original size and tolerances for a direct, hassle-free replacement in Yanmar 3D78 and 3TNC78 engines.
• High Wear Resistance: Constructed from premium-grade cast iron with advanced hardening treatment to minimize cylinder bore wear and extend service intervals.
• Enhanced Heat Dissipation: Designed to efficiently transfer combustion heat away from the piston area, reducing thermal stress and improving engine stability.
• Improved Compression Seal: Precision-honed inner surface ensures optimal piston ring sealing, boosting engine power output and fuel economy.
• Versatile Application: Compatible with multiple machinery types including excavators, forklifts, bulldozers, trucks, and loaders, reducing inventory complexity.
• Cost-Effective Maintenance: Provides a high-value alternative to OEM parts, significantly lowering repair costs for engine overhauls and rebuilds.

Technical Specifications

OEM Cross-Reference

This cylinder liner is a direct replacement for the following Yanmar original equipment manufacturer (OEM) part numbers and engine series:

• Yanmar 3D78 – Standard cylinder liner for 3-cylinder diesel engines
• Yanmar 3TNC78 – Standard cylinder liner for 3-cylinder diesel engines
• Cross Reference: Also compatible with Yanmar 3TNV78 series engines (verify specific application)

Note: Always cross-check your existing part number or engine serial number before ordering to ensure correct fitment.

Compatibility

This cylinder liner is commonly used for the following Yanmar engine models and equipment applications:

• Engine Models: Yanmar 3D78, 3TNC78, and related 3-cylinder diesel variants
• Excavators: Mini and compact excavators powered by Yanmar 3D78/3TNC78 engines
• Forklifts: Material handling equipment with Yanmar diesel power units
• Bulldozers & Loaders: Small construction machinery using these engine series
• Trucks & Buses: Light-duty commercial vehicles with Yanmar diesel engines
• Other Equipment: Generators, pumps, and agricultural machinery with compatible engines

Global Supply & Distribution

We offer worldwide shipping capabilities to meet the demands of international B2B buyers. Our cylinder liners are exported to major markets including:

• North America: USA, Canada, Mexico
• Europe: Germany, UK, Netherlands, France, Italy, Spain
• Asia-Pacific: Japan, South Korea, Australia, New Zealand, Southeast Asia
• Middle East: UAE, Saudi Arabia, Qatar, Kuwait
• Africa & South America: Key industrial and mining regions

We maintain efficient logistics networks to ensure fast delivery to major ports and industrial centers. Our export team handles all customs documentation and international trade compliance, providing a seamless procurement experience for global clients.

Quality Assurance

Every cylinder liner undergoes rigorous quality control procedures to ensure it meets or exceeds OEM performance standards:

• Manufacturing Standards: Produced in ISO-certified facilities using advanced casting and machining processes
• Dimensional Accuracy: 100% inspection of bore diameter, wall thickness, and surface finish
• Material Testing: Hardness and tensile strength verification of cast iron material
• Video Inspection: Outgoing inspection video available upon request for quality verification
• Test Reports: Machinery test report provided with each shipment
• Warranty: 6-month warranty against manufacturing defects

FAQ

Q1: How do I confirm this cylinder liner fits my Yanmar 3D78 engine?
A: Please verify your engine model number (stamped on the engine nameplate) matches 3D78 or 3TNC78. For best results, measure the existing liner’s outer diameter, inner diameter, and height, and compare with OEM specifications. We recommend checking your engine serial number and consulting your equipment manual for exact compatibility.

Q2: What is the recommended installation procedure for this liner?
A: Professional installation is strongly advised. The cylinder bore must be cleaned thoroughly, and the liner should be pressed in using a proper tool to avoid distortion. After installation, check the liner protrusion height above the block deck surface (typically 0.02–0.10 mm). Always use new gaskets and seals during reassembly. We recommend following the Yanmar service manual for your specific engine model.

Q3: What maintenance intervals are recommended after replacing the cylinder liner?
A: After installation, perform a break-in period of 50–100 hours at moderate loads. Change engine oil and filter after the break-in. Thereafter, follow the standard maintenance schedule for your Yanmar engine (typically oil changes every 250–500 hours depending on application). Regularly check coolant condition and engine operating temperature to maximize liner life.