Case 855D Crawler Loader

[MikePhua]

Introduction
The Case 855D Crawler Loader, produced between 1980 and 1994, stands as a testament to Case Construction Equipment's commitment to durability and performance in the construction industry. Renowned for its robust design and versatility, the 855D became a preferred choice for various heavy-duty applications, including grading, land clearing, and material handling.
Development and Technological Advancements
During the early 1980s, the construction industry witnessed a surge in demand for machines that could deliver high performance in challenging job site conditions. In response, Case introduced the 855D, incorporating advanced features to enhance productivity and operator comfort. The loader was equipped with a hydrostatic drive system, providing smooth and precise control over machine movements. This innovation allowed for infinite forward and reverse speeds, enabling operators to adapt seamlessly to varying work conditions.
Engine and Performance Specifications
The Case 855D was powered by a Case 336BD engine, a 4-cylinder, naturally aspirated diesel engine with a displacement of 336 cubic inches (5.5 liters). This engine produced approximately 85 horsepower at 2,200 rpm, delivering reliable power for demanding tasks. The loader's hydrostatic transmission system featured twin-lever controls, offering intuitive operation and reducing operator fatigue.
Dimensions and Weight
The Case 855D's compact dimensions made it suitable for maneuvering in confined spaces:

• Operating Weight: Approximately 20,778 lbs (9,410 kg)
  
• Length: 14 ft 7 in (4.45 m)
  
• Width: 9 ft 5 in (2.87 m)
  
• Height: 9 ft 5 in (2.87 m)
  
• Track Width: 14 in (356 mm)
  
• Ground Clearance: Approximately 1 ft (0.3 m)
  

These dimensions allowed the 855D to operate efficiently in urban construction sites and other areas with space constraints.
Hydraulic System and Attachments
The Case 855D featured a hydraulic system designed for versatility and efficiency:

• Pump Flow Capacity: Approximately 58.5 gallons per minute (221 liters per minute)
  
• Relief Valve Pressure: 2,000 psi (137.9 bar)
  
• Raise Time: 6.7 seconds
  
• Dump Time: 1.5 seconds
  
• Lower Time: 3.7 seconds
  

The loader's hydraulic system supported various attachments, including buckets, forks, and rippers, enhancing its adaptability to different tasks.
Operator Comfort and Safety
Case prioritized operator comfort and safety in the design of the 855D:

• Cab Design: Spacious cab with excellent visibility
  
• Controls: Ergonomic controls to reduce operator fatigue
  
• Safety Features: Roll-over protective structure (ROPS) and falling object protective structure (FOPS)
  

These features contributed to a safer and more comfortable working environment, allowing operators to perform tasks efficiently and with confidence.
Maintenance and Durability
The Case 855D was engineered for durability and ease of maintenance:

• Access Points: Strategically placed access points for routine maintenance tasks
  
• Durable Components: Heavy-duty undercarriage and reinforced frame
  
• Service Intervals: Extended service intervals to reduce downtime
  

These design considerations ensured that the 855D could withstand the rigors of demanding job sites and maintain optimal performance over time.
Legacy and Market Impact
The Case 855D made a significant impact in the construction industry:

• Adoption: Widely adopted by contractors for its reliability and versatility
  
• Reputation: Built a reputation for handling tough tasks efficiently
  
• Influence: Influenced the design of subsequent Case loader models
  

Its success contributed to Case's standing as a leading manufacturer of construction equipment during the late 20th century.
Conclusion
The Case 855D Crawler Loader remains a respected model in the history of construction machinery. Its combination of power, versatility, and durability has left a lasting legacy in the industry. For those seeking a reliable machine for heavy-duty applications, the 855D continues to be a valuable asset.