Replacing the seat on a Case 580 Super E backhoe with practical upgrades

[MikePhua]

Quick answer
Owners of the Case 580 Super E often replace the original seat with aftermarket tractor or forklift seats priced between $110 and $145, offering improved comfort and easier installation. Minor bracket fabrication and spin-lock modifications can enhance usability without major cost.
Case 580 Super E background and operator comfort evolution
The Case 580 Super E, introduced in the early 1980s, was part of Case’s legendary backhoe-loader lineup that dominated North American construction sites for decades. Known for its mechanical reliability and hydraulic strength, the Super E featured a mid-mounted operator station with a rotating seat to switch between loader and backhoe controls.
While the machine’s drivetrain and hydraulics aged gracefully, the original seat often deteriorated due to sun exposure, vibration, and wear. Rusted frames, torn upholstery, and stiff cushions became common complaints, prompting owners to seek economical replacements.
Aftermarket seat options and installation tips
Several operators have successfully installed replacement seats sourced from:

• Tractor Supply Company (TSC): Basic black vinyl seats with adjustable armrests, priced around $145
  
• Amazon: Similar models available for $130, often with free shipping
  
• Coleman Equipment: Previously offered model B94116 for $110, though now discontinued
  

These seats typically require:

• Drilling new holes in the pedestal frame
  
• Fabricating simple brackets using angle iron or flat bar
  
• Reusing or modifying existing seat rails
  

One owner noted that the new seat appeared small at first but matched the dimensions of a standard bar stool, offering surprising comfort and fit. Another added that the armrests could be adjusted before tightening, allowing for personalized ergonomics.
Spin-lock mechanism and custom lever upgrade
The original seat rotation mechanism on the 580 Super E often required slamming the seat back to release the spin lock—a frustrating and imprecise method. To solve this, one operator repurposed a lever from the new seat’s rail system and welded it to the spin-lock shaft. This allowed smooth rotation with a simple touch, improving workflow and reducing strain.
Steps for this upgrade:

• Salvage a lever from the new seat’s rail assembly
  
• Cut and weld it to a steel tube or bracket
  
• Attach the assembly to the spin-lock shaft
  
• Paint for corrosion resistance and visual integration
  

This modification turned a clunky mechanism into a fluid motion, enhancing the operator experience without purchasing a new base.
Comfort, safety, and long-term usability
Modern replacement seats offer:

• Improved cushioning for long shifts
  
• Armrest support for loader and backhoe operation
  
• Seatbelt integration for safety compliance
  
• Weather-resistant vinyl for outdoor use
  

While some seats lack armrests or require metric bolts, these issues are minor and easily resolved. The upgrade not only improves comfort but also extends the machine’s usability for owner-operators and small contractors.
Recommendations for seat replacement

• Measure pedestal dimensions before purchase
  
• Choose seats with adjustable armrests and seatbelt mounts
  
• Inspect spin-lock mechanism and consider lever retrofit
  
• Use anti-seize on bolts and paint exposed metal
  
• Keep old seat rails for future fabrication needs
  

Conclusion
Replacing the seat on a Case 580 Super E is a straightforward upgrade that enhances comfort, safety, and functionality. With affordable aftermarket options and simple fabrication, operators can transform their aging backhoe into a more enjoyable and efficient machine. Small touches like a custom spin-lock lever make a big difference in daily use, proving that thoughtful modifications can rival factory design.