Komatsu 3D84N-2CA(S/N 03250-UP)

Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.

Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.

Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.

Every catalogued assembly group for the Komatsu 3D84N-2CA(S/N 03250-UP). Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

The PIN plate for the 3D84N-2CA engine is located on the right-hand side of the cab on the lower frame for excavators, or on the front frame for wheel loaders. The engine serial number is stamped on the engine block, typically on the left side near the injection pump. The machine serial number is also stamped directly into the chassis frame casting on the right-hand side. A mismatch between the riveted plate and the chassis-engraved serial is a primary stolen-equipment signal. Komtrax telematics is standard equipment on construction-line machines from approximately 2008. Komtrax records hours independently of the dash and cannot be rolled back by tampering with the cluster. Komtrax is free for the registered owner for the life of the machine on enrolled units. Komatsu parts are often grouped by first digit: 1 for dozers, 2 for excavators / graders / rollers, 3 for forklifts, 4 for wheel loaders / snow vehicles, 5 for dump trucks, 6 for engine, 7 for hydraulics / electrical, 8 for pumps. Komatsu engine model numbers comprise a combination of letters and digits. S indicates turbocharger, AA or A indicates intercooler, 6 indicates number of cylinders, D indicates engine type (inline engine), 125 indicates cylinder diameter, E indicates low-emission, and 2 indicates stage of development/series. Komatsu engines are often labelled with codes like E15, E10, and E11. These codes denote different engine specifications and functionalities. Cummins and Yanmar engines are also used in Komatsu equipment. Komatsu Genuine Oil Specifications Guide provides details on product lines including diesel engine oil, hydraulic oil, axle oil, powertrain oil, and super coolant. Komatsu lubricants are formulated to meet the strict Komatsu Engineering Standard which exceeds other standards. CAT Komatsu Chevron Product Recommendations provide off-road OEM specifications. Komatsu fluids are a customer support tool for construction and service departments of Komatsu Group. The application lists recommended fluids. Komatsu fault codes cover issues with the engine controller, sensors, valves, pumps, temperature levels, pressure levels, circuits, and more. The fault codes indicate abnormalities and failures in the engine, cooling, fuel, electrical, and hydraulic systems that could cause decreased output, stalling, overheating or other issues requiring repair or maintenance. Komatsu error codes are displayed on the monitor display panel to remind you that the excavator is faulty. Learn to read these fault codes can help you timely solve the machine failures and prevent possible accidents. Common Komatsu excavator problems include mechanical wear, corrosion, and pre-existing damage. Components like the final drives, hydraulic pumps, turbos, and complete undercarriage systems require regular maintenance to ensure peak performance. Over time, track chains, rollers, idlers, and sprockets experience wear and may need replacement to prevent costly downtime. Keeping hydraulic systems well-maintained and ensuring proper cooling system function helps extend the lifespan of these machines, improving efficiency and reliability in the field. Komatsu excavators are engineered for durability, reliability, and high performance in demanding applications such as construction, mining, and site development. Models like the PC200LC-8, PC360LC-11, and PC490LC-11 are equipped with advanced hydraulic systems and fuel-efficient Komatsu diesel engines, delivering exceptional digging power and operational efficiency. Their spacious cabs, intuitive controls, and cutting-edge technology enhance operator comfort and productivity on the job. Komatsu is a leading manufacturer of construction, mining, forestry, and industrial heavy equipment. Komatsu Genuine and Reman parts are available through My Komatsu, with options to pick up at a Komatsu dealer or direct delivery. Komatsu Attachments are available. Komatsu Fault Code List Lookup and Decoding helps identify issues fast and prevent downtime. All you need to know about decoding Komatsu's diagnostic fault codes. Komatsu Error Codes list. Komatsu Fault Codes Reference Guide. Komatsu fault codes lis ttxt. Komatsu Fault/Error Codes list - DIY & Guides. Common Komatsu Excavator Problems and How to Fix Them. KOMATSU OPINIONS - Maintenance & Troubleshooting discussion in Forkliftaction's forums. Question for Komatsu owners | published references. Common Issues of Used Komatsu Excavators and How to Fix Them. Forum - Komatsu club. Komatsu Equipment Troubling And Repair – MyMROmarts. komatsu | published references. Thank you for visiting published references! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the

Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.