International Harvester 3500A Backhoe Loader Overview

[MikePhua]

   

The International Harvester 3500A backhoe loader, produced between 1972 and 1977, stands as a testament to the engineering prowess of its era. Designed for versatility and durability, this machine catered to a wide range of construction and agricultural tasks. Its robust build and innovative features made it a preferred choice for many operators during its production years.
Development and Manufacturing
International Harvester (IH), founded in 1902, was a significant player in the manufacturing of agricultural and construction equipment. The 3500A was part of IH's strategy to expand its construction equipment line, following the acquisition of the Hough company in 1952, which brought the Payloader series into its portfolio. The 3500A was assembled in various IH plants, including those in Doncaster, England, and the U.S. Its design incorporated feedback from operators and advancements in hydraulic technology, ensuring it met the demands of modern construction sites.
Specifications

• Engine: 80 hp (59.7 kW) diesel engine
  
• Transmission: 8-speed gear transmission with mechanical reverser
  
• Hydraulic System:
  • Total flow: 30.1 gpm (113.9 lpm)
    
  • Steering flow: 2.7 gpm (10.2 lpm)
    
• Dimensions:
  • Wheelbase: 82 inches (208 cm)
    
  • Weight: 14,250 lbs (6,463 kg)
    
  • Rear tires: 17.5L-24
    
• Loader Bucket: 3' x 7' x 24"
  
• Backhoe Digging Depth: 17.4 inches (44 cm)
  

Performance and Features
The 3500A was equipped with a hydrostatic power steering system, providing smooth and responsive control. Its independent hydraulic wet disc brakes ensured reliable stopping power, even under heavy loads. The machine's design allowed for easy maintenance, with accessible components and clear service points. Operators appreciated the comfort of the cab, which could be equipped with a heater for colder climates.
Legacy and Collectibility
While production of the 3500A ceased in the late 1970s, its legacy endures among collectors and enthusiasts. The machine's durability and the availability of parts have contributed to its continued presence in various industries. Restored models are often showcased at vintage machinery events, highlighting the enduring appeal of IH's engineering.
Conclusion
The International Harvester 3500A backhoe loader exemplifies the blend of innovation and practicality that characterized IH's approach to construction equipment. Its robust design and versatile capabilities have ensured its place in the annals of heavy machinery history. For those interested in vintage construction equipment, the 3500A offers a glimpse into the technological advancements of the 1970s and remains a valuable asset for various applications.