Case 855D Crawler Loader: Specifications and Engine Evolution

[MikePhua]

Overview of the Case 855D Crawler Loader
The Case 855D Crawler Loader is a robust, high-performance track loader known for its reliability and power in tough jobsite conditions. A workhorse in the construction and forestry industries, the 855D features a powerful Case diesel engine, hydrostatic drive, and rugged undercarriage — making it ideal for heavy-duty applications like grading, land clearing, and loading.
Engine Specifications
The Case 855D Crawler Loader is equipped with a Case 6T-590 engine, a 6-cylinder diesel engine known for its durability and performance. Here are the key specifications:

• Engine Type: 6-cylinder diesel
  
• Displacement: 5.88 liters
  
• Engine Power: 90 horsepower
  
• Maximum Torque: 344 Nm
  
• Number of Cylinders: 6
  
• Cylinder Bore x Stroke: 102 x 120 mm
  

Transmission and Drive System
The 855D Crawler Loader utilizes a hydrostatic drive system, providing infinite forward and reverse gears via twin-lever control. This system offers smooth operation and precise control, essential for various construction tasks. The loader also features dual steering levers with hydrostatic power steering, enhancing maneuverability. Braking is achieved through spring-applied, hydraulic release brakes, ensuring safety and reliability on the job site.
Dimensions and Weight
The Case 855D Crawler Loader has the following dimensions:

• Operating Weight: Approximately 10,000 kg
  
• Transport Length: 4.32 meters
  
• Transport Width: 2.01 meters
  
• Transport Height: 4.52 meters
  
• Bucket Width: 2.01 meters
  
• Track Width: 356 mm
  

These dimensions make the 855D suitable for a variety of tasks, from grading to material handling, while maintaining a compact size for maneuverability in tight spaces.
Production Years and Engine Evolution
The Case 855D Crawler Loader was produced from 1980 to 1994. During this period, Case transitioned from using its own in-house engines to incorporating Cummins engines into their equipment. Prior to the late 1980s, the 855D models were equipped with Case-branded engines. However, after Cummins acquired Case's engine line around 1988/89, subsequent 855D models were powered by Cummins engines. This shift marked a significant change in the loader's performance and serviceability, as Cummins engines are widely recognized for their reliability and parts availability.
Maintenance and Service Considerations
Maintaining the Case 855D Crawler Loader involves regular checks and servicing of its key components:

• Engine: Regular oil changes, air and fuel filter replacements, and coolant checks are essential to keep the engine running smoothly.
  
• Hydraulic System: Inspecting hydraulic hoses and cylinders for leaks, checking fluid levels, and replacing filters as needed ensures optimal performance.
  
• Undercarriage: Monitoring track tension, inspecting for wear, and replacing track components when necessary prolongs the life of the undercarriage.
  
• Transmission and Steering: Regularly checking the hydrostatic drive system for proper operation and addressing any issues promptly maintains the loader's maneuverability.
  

Conclusion
The Case 855D Crawler Loader is a versatile and durable machine, suitable for a wide range of construction and forestry applications. Its evolution from Case-branded engines to Cummins engines reflects the industry's trend toward standardization and improved performance. Proper maintenance and understanding of its specifications ensure that the 855D continues to serve effectively on job sites for years to come.