Identifying the Engine in a Case 850D Crawler Dozer

[MikePhua]

Introduction
The Case 850D crawler dozer, produced between 1980 and 1994, is a robust machine known for its versatility in construction and earthmoving applications. Accurately identifying the engine model is crucial for maintenance, parts replacement, and ensuring optimal performance. This guide provides detailed information on how to identify the engine in a Case 850D dozer, including engine specifications, serial number locations, and tips for sourcing compatible parts.
Engine Specifications
The Case 850D dozer is equipped with either a naturally aspirated or turbocharged Cummins 6-590 engine, delivering approximately 82 horsepower (61 kW). The engine's displacement and configuration contribute to the dozer's reliable performance in various terrains. The 6-590 engine is known for its durability and efficiency, making it a popular choice in heavy equipment.
Locating the Engine Serial Number
To accurately identify the engine model and obtain the correct parts, locating the engine serial number is essential. The serial number plate is typically found in the following locations:

• Right Side of the Operator's Platform: Near the manual storage compartment, on the operator's side firewall.
  
• Left Side of the Machine Frame: Close to the radiator, if the plate is missing or damaged.
  

For engine-specific identification:

• 6-Cylinder Engines: The engine serial number is usually stamped on the timing cover, just above the injection pump.
  
• 4-Cylinder Engines: The serial number is often found on the front valve cover.
  

Understanding Serial Number Formats
The Case 850D dozer employs different serial number formats depending on the production year:

• Early Models (1980s): Serial numbers may begin with numeric values.
  
• Later Models (1990s): Serial numbers often start with the prefix "JAK."
  

For example, a serial number like "7402301" indicates an early model, while "JJG0217001" represents a later model. This distinction is important when sourcing parts, as specifications may vary between production years.
Engine Identification Tips

• Verify Engine Configuration: Ensure whether the engine is naturally aspirated or turbocharged, as this affects performance and parts compatibility.
  
• Consult the Operator's Manual: The manual provides detailed information on engine specifications and maintenance guidelines.
  
• Use Online Resources: Websites like Broken Tractor offer comprehensive specifications and serial number information for the Case 850D dozer.
  

Sourcing Replacement Parts
Once the engine model is identified, sourcing compatible parts is the next step:

• Authorized Dealers: Purchasing parts directly from Case or authorized dealers ensures OEM (Original Equipment Manufacturer) quality and compatibility.
  
• Aftermarket Suppliers: Companies like Broken Tractor and Tractor Parts ASAP offer a range of compatible parts for Case equipment.
  
• Online Marketplaces: Platforms such as eBay and Amazon list various parts, including both new and used options.
  

Conclusion
Accurate engine identification in a Case 850D crawler dozer is vital for effective maintenance and parts replacement. By locating the engine serial number and understanding the serial number formats, operators can ensure compatibility and optimal performance. Utilizing the resources mentioned above will aid in sourcing the correct parts and maintaining the dozer's reliability in the field.