Koehring 6633: A Legacy in Hydraulic Excavation

[MikePhua]

Introduction
The Koehring 6633 hydraulic excavator, produced between 1985 and 1987, stands as a testament to the engineering prowess of its time. Manufactured by Koehring Company, a prominent American heavy equipment manufacturer, the 6633 model was designed to meet the demanding needs of construction and excavation projects.
Technical Specifications
The Koehring 6633 is a crawler-type hydraulic excavator with the following specifications:

• Operating Weight: Approximately 33.14 tons
  
• Transport Dimensions:
  • Length: 11 meters
    
  • Width: 3 meters
    
  • Height: 3 meters
    
• Track Width: 800 mm
  
• Bucket Capacity: Up to 1 cubic meter
  
• Maximum Reach: 12.21 meters
  
• Dredging Depth: 8.29 meters
  
• Tear-Out Force: 154.95 kN
  
• Bucket Width: 1.524 meters
  
• Special Equipment: Air conditioning, diesel particulate filter, overload alert system
  

Design and Features
The 6633 model was engineered for versatility and durability. Its robust undercarriage and powerful hydraulic system allowed it to perform a wide range of tasks, from digging and lifting to material handling. The inclusion of air conditioning and an overload alert system enhanced operator comfort and safety, ensuring efficient operation in various environmental conditions.
Historical Context
Koehring Company, founded in 1907 in Milwaukee, Wisconsin, was a significant player in the heavy equipment industry. By 1921, the company had introduced its line of cranes and excavators, establishing a reputation for quality and innovation. In 1987, Koehring's crane and excavator assets were acquired by Northwest Engineering, which later merged with Terex Corporation, continuing the legacy of Koehring's engineering excellence .
Legacy and Impact
The Koehring 6633 hydraulic excavator contributed to the advancement of hydraulic excavation technology. Its design influenced subsequent models and set standards for performance and reliability in the industry. Although production ceased in the late 1980s, the 6633 remains a respected model among vintage heavy equipment enthusiasts and collectors.
Conclusion
The Koehring 6633 hydraulic excavator exemplifies the innovation and craftsmanship of its era. Its technical specifications and design features reflect the company's commitment to producing high-quality machinery. Today, the 6633 continues to be remembered as a significant model in the history of hydraulic excavation equipment.