Rakennuskoneet Komatsu Bare Engine Assembly 4D102 sylinterilohko

The Komatsu 4D102 series is a highly mature four-cylinder diesel engine widely used in compact construction machinery. Renowned for its compact design, smooth operation, and excellent torque output, it serves as the ideal power plant for numerous excavators, loaders, and compact power units. Its "bare engine assembly" typically comprises core components such as the cylinder block, cylinder head, crankshaft, connecting rods, pistons, and camshaft, providing a solid foundation for complete engine replacement or major overhauls.

Engine Configuration: Inline 4-cylinder, 4-stroke, 3.26L displacement

Cooling System: Water-cooled (high-efficiency circulation design)

Rated Power: Approx. 45–60 kW (60–80 hp); ratings vary slightly based on specific applications

Fuel System: Mechanical fuel injection (easy maintenance, reliable operation)

Key Advantages:

High Reliability: Designed to withstand high-frequency operations; offers a long service life and low failure rate.

Maintenance-Friendly: Logical component design facilitates quick disassembly and servicing by technicians.

Compact & Efficient: Excellent power-to-weight ratio allows for easy integration into machinery chassis with limited space.

Primary Applications: Komatsu PC60/PC78 series compact excavators, compact loaders, industrial power pump stations, and specialized utility vehicles.

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 global success stories and maintenance expertise. Drawing on frontline experience in resolving complex mechanical issues, we have earned widespread acclaim and grown into a comprehensive enterprise employing over 200 professionals.

We deeply understand the challenges equipment faces under extreme conditions and possess extensive practical experience and expertise in the following areas:

Heavy Machinery Power Upgrades and Retrofitting: We provide customized engine overhaul and replacement solutions for various types of construction machinery, with specialized proficiency in major power platforms such as Komatsu. Mining and Industrial Equipment Maintenance: We provide professional power optimization strategies to ensure equipment maintains continuous operational capability under heavy-load conditions.

Agricultural and Irrigation Power Systems: We offer power unit upgrades and comprehensive troubleshooting services for a wide range of agricultural machinery and irrigation/drainage equipment.

Leveraging our extensive technical expertise, we are also a robust supplier of spare parts:

Comprehensive Mechanical Parts Supply: We offer a wide selection of carefully curated parts for construction and engineering machinery—including piston assemblies, cylinder heads, crankshafts, engine overhaul gasket kits, and hydraulic components—to meet all your one-stop procurement needs.

Our wealth of 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 possesses the expertise to help you succeed!