CAT C4.4 Bare Engine Assembly

The C4.4 is a compact, high-performance inline-four-cylinder diesel engine from Caterpillar. Widely used in small-to-medium construction machinery, agricultural equipment, and industrial power units, it is renowned for its excellent power density, fuel efficiency, and quiet operation. The C4.4 bare engine assembly typically comprises core components such as the cast-iron cylinder block, cylinder head, crankshaft, connecting rods, pistons, and camshaft, serving as an ideal foundation for efficient overhauls or complete engine replacements. Engine Configuration: Inline-4 cylinder, 4-stroke, 4.4-liter displacement Cooling System: High-efficiency liquid cooling (with optimized thermal balance management) Air Intake System: Turbocharged and aftercooled (ensuring robust and stable power output) Rated Power: Approximately 60 – 110 kW (80 – 148 hp), calibrated according to the application (e.g., compact excavators, loaders, or industrial pump sets) Fuel System: High-pressure common rail injection system (electronically controlled for superior emissions compliance and fuel economy) Key Advantages: Compact Design: Exceptionally high power density; fits into space-constrained machinery chassis with highly flexible installation options. Intelligent Control: Advanced electronic control systems automatically optimize injection parameters for various operating conditions, significantly reducing fuel consumption. High Reliability: Inherits the rugged DNA of Caterpillar’s ​​heavy-duty engines, offering a long service life and excellent fatigue resistance. Primary Applications: CAT compact excavators (300 series), skid-steer loaders, compact rollers, agricultural power units, industrial pump sets, and small generator sets. 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 our frontline experience in solving 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 replacement and overhaul solutions for various types of construction machinery, specializing in the refurbishment and tuning of leading high-end power platforms such as Caterpillar. **Mining and Industrial Equipment Maintenance:** We offer professional power optimization and fault diagnosis strategies to ensure equipment maintains continuous operational capability under heavy-load conditions. **Agricultural and Irrigation Power Systems:** We provide 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 Machinery Parts Supply:** We offer a wide selection of carefully curated construction machinery parts—including common-rail injectors, piston and connecting rod kits, precision cylinder heads, turbochargers, and engine overhaul gasket kits—to fully meet 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 has the expertise to help you succeed! Please contact our sales representative, Mr. Zhan. WeChat/WhatsApp: +86 180 2712 4770