This manual covers the Komatsu PC340NLC-6K Hydraulic Excavator, serial numbers K30001 and up. This robust machine is powered by a Komatsu SAA6D114E-3 turbocharged, aftercooled, direct injection diesel engine, delivering 265 HP and meeting EPA Tier 3 / EU Stage IIIA emissions standards. Its hydrostatic, two-speed transmission allows for travel speeds up to 5.0 km/h, supported by a substantial operating weight of approximately 33,500 kg. Engineered for demanding construction and earthmoving applications, the PC340NLC-6K exemplifies Komatsu's commitment to reliability and performance in heavy-duty equipment. The scope of this digital manual collection, comprising both a Service Manual and an Operation & Maintenance Manual, is to provide comprehensive technical information for the Komatsu PC340NLC-6K. It details essential maintenance procedures, including fluid capacities and service intervals for engine oil and hydraulic filters, alongside critical troubleshooting guidance and technical specifications. This resource is designed to assist owners, operators, and service technicians in effectively maintaining, operating, and repairing the excavator, ensuring its optimal performance and longevity.