This comprehensive service repair manual provides in-depth information on maintaining, assembling, disassembling, and servicing the Komatsu PC27MR-2, PC30MR-2, PC35MR-2, PC40MR-2, and PC50MR-2 hydraulic excavators.

The manual covers a wide range of topics, including:

* **Specifications and Dimensions:** Detailed drawings, specifications, and weight tables for each model.
* **Lubricants, Fuel, and Coolant:** Specifications for essential fluids used in the excavators.
* **Structure, Function, and Maintenance Standards:** Comprehensive information on the structure and operation of each system, including the PTO, cooling system, power train, swing circle, swing machinery, track frame, idler cushion, idler, track roller, carrier roller, sprocket, track shoe, hydraulic components, hydraulic tank, center swivel joint, travel motor, hydraulic cylinder, solenoid valve, multi-control valve, hydraulic pump, control valve, CLSS, swing motor, PPC valve, work equipment, floor, air conditioner, engine control, electric control system, component parts of the system, monitor system, monitor panel, and sensors.
* **Testing and Adjusting:** Standard value tables for engine and chassis related parts, along with detailed testing and adjusting procedures, and troubleshooting guides.
* **Disassembly and Assembly:** Step-by-step instructions for disassembling and assembling major components, including the fuel injection pump assembly, radiator and hydraulic oil cooler assembly, engine and hydraulic pump assembly, track shoe assembly, idler assembly, recoil spring assembly, track roller assembly, carrier roller assembly, center swivel joint assembly, floor frame assembly, swing motor and swing machinery assembly, work equipment assembly, revolving frame assembly, swing circle assembly, control valve assembly, hydraulic cylinder assembly, air conditioner unit assembly, operators cab glass (stuck glass), and front window assembly.
* **Hydraulic Circuit Diagrams:** Detailed diagrams for each model, including PC27MR-2, PC30MR-2, PC35MR-2, PC40MR, 50MR-2, and PC40MR, 50MR-2 (additional attachment circuit).
* **Electrical Circuit Diagrams:** Comprehensive diagrams for each model, including PC27MR, 30MR-2, PC35MR-2, and PC40MR, 50MR-2.

This manual is a valuable resource for anyone who needs to maintain, repair, or troubleshoot these Komatsu excavators. It is filled with detailed diagrams, illustrations, and schematics, making it easy to understand and follow the instructions.

The Komatsu PC27MR-2, PC30MR-2, PC35MR-2, PC40MR-2, and PC50MR-2 are compact hydraulic excavators designed for a wide range of applications, from landscaping and utility work to light demolition and construction. These machines are known for their maneuverability, power, and efficiency, making them popular choices for contractors and operators working in tight spaces or on projects demanding precision. The models are differentiated by their operating weight, with the PC27MR-2 being the smallest and the PC50MR-2 being the largest. All models feature a robust design with a durable undercarriage, powerful hydraulic systems, and comfortable operator cabs. They are equipped with Komatsu's renowned engine technology, providing reliable performance and fuel efficiency.

These excavators offer various features that enhance their versatility and operator comfort. They include adjustable boom and arm configurations, a wide range of attachments, and a spacious cab with ergonomic controls, a suspension seat, and excellent visibility. The PC27MR-2 to PC50MR-2 series is known for its advanced safety features, such as an optional overload protection system, a reinforced ROPS/FOPS cab structure, and comprehensive maintenance accessibility. The Komatsu PC27MR-2, PC30MR-2, PC35MR-2, PC40MR-2, and PC50MR-2 excavators are designed for long-lasting service and are supported by a comprehensive network of Komatsu dealerships offering parts, service, and training. With their performance, reliability, and operator-friendly features, these excavators provide a powerful and efficient solution for a variety of work sites.