KOMATSU PC400LC-7MH CRAWLER EXCAVATOR

Technical Description

The Komatsu PC400LC-7MH is a heavy-duty excavator powered by a robust Komatsu SAA6D125E-5 turbocharged and air-to-air aftercooled engine, delivering 345 hp (257 kW). This engine employs an electronically controlled high-pressure common rail fuel injection system and cooled EGR (Exhaust Gas Recirculation), ensuring high output with reduced emissions compliant with EPA Tier 3 and EU Stage 3A standards. The machine's operating weight is approximately 118,211 lbs, enabling excellent stability and work capacity on challenging terrains. The PC400LC-7MH features two primary operation modes: Active mode and Economy (Eco) mode. Active mode maximizes engine output for heavy-duty tasks, offering powerful and rapid cycle times with optimized fuel efficiency. Economy mode maintains operation speed close to Active mode but focuses on lowering fuel consumption for light-duty tasks, delivering up to 20% better fuel efficiency than previous models. The excavator’s hydraulic system is enhanced by two return hoses for improved performance, enabling faster arm movement and increased digging forces—arm crowd force is increased by approximately 8%, and bucket digging force by around 9% with the Power Max function. Its undercarriage features a variable gauge, improving lateral stability by 30% compared to fixed gauge models. The spacious ROPS-certified cab includes an automatic air conditioner and a multi-function color monitor that controls working modes and monitors critical engine and hydraulic parameters with advanced diagnostic capabilities. Maintenance is simplified through extended replacement intervals for engine oils and filters, easy radiator and oil cooler access, and a high-capacity air cleaner. The excavator's travel speed reaches up to 5.5 km/h (3.4 mph) in high mode, with dimensions optimized for transportation and on-site maneuverability, making the PC400LC-7MH an effective, fuel-efficient choice for demanding excavation operations.