Restoring Peterson Horizontal Grinders

[MikePhua]

Introduction
Peterson Pacific Corp., established in 1981, revolutionized the wood-waste recycling industry by introducing the horizontal grinder. This innovation stemmed from a simple sketch provided by a customer, which laid the foundation for a machine that would become a staple in land clearing and recycling operations. Over the years, Peterson has expanded its range of grinders, offering models like the 1700D, 2710D, 4710D, and 5710D, each designed to meet specific operational needs.
The Challenge of Restoration
Restoring a Peterson horizontal grinder is a formidable task that requires a deep understanding of the machine's design and components. These grinders are built to withstand the rigors of heavy-duty operations, and over time, components such as the rotor, grates, and engine can experience significant wear. For instance, the 5710D model, known for its high throughput and mobility, features a 66 x 50-inch feed opening and is powered by a 1,125 hp Caterpillar C32 engine.
Key Areas of Focus in Restoration

1. Rotor and Hammermill
   The rotor is the heart of the grinder, and its condition directly impacts performance. Inspecting for cracks, wear, and ensuring the hammers are securely fastened is crucial. In some cases, replacing the rotor may be necessary to restore optimal function.
   
2. Grate System
   Peterson grinders utilize a quick-change grate system, allowing operators to adjust the size of the output material. During restoration, it's essential to check for any damage or wear to the grates and replace them if needed to maintain product consistency.
   
3. Engine and Hydraulics
   The engine, such as the Caterpillar C32, should be thoroughly inspected for any signs of wear or damage. Hydraulic systems should be checked for leaks, and hoses should be replaced if they show signs of wear. Regular maintenance of these systems ensures the grinder operates efficiently.
   
4. Frame and Structural Integrity
   Over time, the frame can experience stress and fatigue. It's vital to inspect for any cracks or signs of weakness and address them promptly to prevent further damage.
   

The Restoration Process
Restoring a Peterson horizontal grinder involves several steps:

• Disassembly: Carefully dismantling the machine to access all components.
  
• Inspection: Thoroughly checking each part for wear and damage.
  
• Replacement: Replacing worn or damaged parts with OEM or equivalent components.
  
• Reassembly: Putting the machine back together, ensuring all parts are correctly installed.
  
• Testing: Running the grinder to ensure it operates at peak performance.
  

Conclusion
Restoring a Peterson horizontal grinder is a challenging yet rewarding endeavor. With the right knowledge and resources, these machines can be brought back to life, continuing to serve in various applications such as land clearing and recycling. The process not only extends the life of the equipment but also ensures that it continues to meet the high standards set by Peterson Pacific Corp.