Yanmar 4TNV98 Bare Engine Assembly

The Yanmar 4TNV98 is an inline-four-cylinder diesel engine widely recognized in the global compact construction machinery sector. Renowned for its compact size, excellent fuel efficiency, and superior load adaptability, it is extensively used in various compact excavators, skid-steer loaders, and industrial generator sets. Its "Bare Engine Assembly" typically comprises core components such as the cast-iron cylinder block, cylinder head, crankshaft, connecting rods, pistons, and camshaft, serving as a primary solution for complete engine replacement or comprehensive overhauls. Engine Configuration: Inline-four-cylinder, 4-stroke, water-cooled; displacement of 3.319 liters Cooling System: High-efficiency water cooling (optimized for high-heat environments and operation in confined spaces) Air Intake System: Naturally aspirated or turbocharged (depending on specific equipment power requirements, ensuring smooth power delivery) Rated Power: Approx. 45 – 65 kW (60 – 87 hp); features excellent torque response, delivering strong output even at low RPMs Fuel System: Mechanical direct-injection fuel system Key Advantages: Ultra-compact: High power-to-volume ratio makes it ideal for installation in space-constrained machinery chassis; highly convenient for installation and maintenance. High Durability: Built with Yanmar’s signature heavy-duty materials; core components offer an exceptionally long service life and maintain a very low failure rate, even under heavy loads. Low Maintenance Complexity: The purely mechanical fuel injection structure significantly reduces reliance on on-site diagnostic tools, making it ideal for rapid repairs in the field. Primary Applications: Komatsu compact excavators (e.g., PC series), Takeuchi excavators, skid-steer loaders, and various industrial power pump stations. Guangzhou Jianming Machinery Equipment Co., Ltd. With 20 years of solid practical experience, we are experts in the field of machinery power systems and components. We began as a small machinery repair shop. Over the past two decades, we have accumulated a wealth of successful global case studies and extensive maintenance experience. Drawing on extensive frontline experience in resolving complex mechanical issues, we have earned global acclaim and grown into a comprehensive enterprise employing over 200 professionals. We deeply understand the challenges equipment faces under extreme conditions and possess rich practical experience and expertise in the following areas: **Heavy Machinery Power Upgrades & Retrofitting:** We provide customized engine replacement and overhaul solutions for various types of construction machinery, with specialized expertise in the restoration and tuning of Yanmar 4TNV series power units. **Mining & Industrial Equipment Maintenance:** We offer professional power optimization and fault diagnosis strategies to ensure equipment remains operational under heavy-load conditions. **Agricultural & Irrigation Power Systems:** We provide power unit upgrades and comprehensive troubleshooting services for a wide range of small agricultural machinery and irrigation/drainage equipment. Leveraging our deep technical expertise, we are also a robust supplier of spare parts: **Comprehensive Parts Supply:** We offer a wide selection of carefully curated construction machinery parts—including fuel injectors, piston and connecting rod kits, precision cylinder heads, engine overhaul gasket sets, and durable crankshafts—to meet all your one-stop procurement needs. Our extensive practical experience and robust supply chain system are our most valuable assets. Whether you are facing complex mechanical challenges or require reliable spare parts, Jianming Machinery has the expertise to help you succeed! Please contact our sales representative, Mr. Zhan. WeChat/WhatsApp: +86 180 2712 4770