JOHN DEERE 550 LC CRAWLER EXCAVATOR

Technical Description

The John Deere 550 LC is a heavy-duty hydraulic excavator engineered for high productivity and durability in demanding construction and earthmoving tasks. It features a robust Cummins N14-C turbocharged engine delivering 361 hp (269 kW) and 1240 lb-ft of torque from an 854 cubic inch displacement, providing consistent power for excavation operations. The excavator is equipped with two variable-displacement axial-piston pumps with a combined hydraulic flow capacity of 101 gallons per minute, operating at a relief valve pressure of 4340 psi, to ensure responsive and efficient hydraulic performance for heavy lifting, digging, and material handling. This model offers versatile boom and stick configurations, with five options providing a maximum cutting height from 36.3 ft to 41.6 ft and maximum digging depths ranging from 22.7 ft to 32.2 ft, allowing it to adapt to varied job site requirements. The maximum reach along the ground spans from 36.9 ft up to 46.8 ft, and loading heights vary between 23.7 ft and 30.1 ft depending on the boom/stick set up. The bucket capacity ranges from 1.7 to 5.5 cubic yards, with a reference size of 3.9 cubic yards for general applications. Dimensionally, the 550 LC has a ground clearance of 2.7 ft, a cab height of 11.1 ft, a track gauge of 10.5 ft, and a width across tracks of 13.5 ft, contributing to stable operations and maneuverability on rugged terrain. The undercarriage includes 52-track shoes per side of 24-inch size, 9 track rollers, and 3 carrier rollers, supporting an operating weight of approximately 123,867 lbs and a travel speed up to 2.9 mph. Drawbar pull reaches 83,800 lbs with a ground pressure of 14.5 psi, balancing power and flotation for challenging surfaces. The tail swing radius is 12.5 ft, facilitating tight site work. Fuel capacity stands at 185 gallons with 17.5 gallons coolant and 11.5 gallons engine oil capacities, sustaining extended work cycles without frequent refills. Electrical and auxiliary systems operate on 24 volts with a 75-amp alternator, and the swing mechanism delivers an 8 rpm swing speed powered by 2.1 gallons of swing drive fluid. The 550 LC’s design prioritizes serviceability with accessible maintenance points. Overall, the John Deere 550 LC excels in power, hydraulic efficiency, and operational flexibility, making it suited for complex excavation, loading, and grading tasks in harsh environments.