Rebuilding the Torque Converter Transmission of the Case 585C

[MikePhua]

Introduction
The Case 585C forklift, a robust piece of equipment, has been a staple in various industries due to its durability and reliability. Central to its performance is the torque converter transmission, which, over time, may require rebuilding to maintain optimal functionality. This article delves into the intricacies of rebuilding the torque converter transmission of the Case 585C, offering detailed insights, step-by-step procedures, and practical tips for enthusiasts and professionals alike.
Understanding the Case 585C Torque Converter Transmission
The Case 585C is equipped with a power shuttle transmission featuring a torque converter. This setup provides four forward and four reverse speeds, facilitating smooth directional changes without the need for clutch engagement. The torque converter plays a pivotal role in transmitting engine power to the transmission, offering benefits such as smooth acceleration and reduced shock loads on drivetrain components.
Common Issues Leading to Transmission Rebuild
Over time, several issues may necessitate a transmission rebuild:

• Slipping Gears: A common sign of worn clutch packs or seals, leading to loss of power transmission.
  
• Delayed Engagement: Indicates possible issues with the torque converter or valve body, causing a lag in gear engagement.
  
• Overheating: Excessive heat can degrade transmission fluid and components, leading to premature wear.
  
• Fluid Leaks: Leaks can result in low fluid levels, impairing lubrication and cooling, and causing damage to internal parts.
  

Step-by-Step Rebuilding Process

1. Preparation and Safety Measures
   • Disconnect Power: Ensure the forklift is turned off, and disconnect the battery to prevent accidental starts.
     
   • Drain Fluids: Remove all transmission fluid to avoid spills and contamination.
     
   • Lift and Support: Use appropriate lifting equipment to elevate the forklift safely, securing it with jack stands.
     
2. Removing the Transmission
   • Disconnect Linkages: Carefully detach all shift linkages and electrical connectors.
     
   • Unbolt Transmission: Remove the bolts securing the transmission to the engine and frame.
     
   • Extract Transmission: With assistance, carefully slide the transmission out, ensuring no damage to surrounding components.
     
3. Disassembling the Torque Converter
   • Remove Converter Bolts: Unfasten the bolts securing the torque converter to the flywheel.
     
   • Extract Converter: Gently pull the torque converter out, taking care not to damage the pump or seals.
     
4. Inspecting Components
   • Check for Wear: Examine clutch packs, seals, and bearings for signs of wear or damage.
     
   • Measure Clearances: Use appropriate tools to measure component clearances, ensuring they are within manufacturer specifications.
     
5. Cleaning and Replacing Parts
   • Clean Components: Thoroughly clean all parts using suitable solvents to remove debris and old fluid.
     
   • Replace Worn Parts: Install new seals, bearings, and clutch packs as needed.
     
6. Reassembling the Transmission
   • Reinstall Torque Converter: Position the torque converter onto the pump, ensuring proper alignment.
     
   • Secure Components: Tighten all bolts to the specified torque values.
     
   • Reattach Linkages: Reconnect all shift linkages and electrical connectors.
     
7. Reinstallation and Testing
   • Reinstall Transmission: Carefully slide the transmission back into position, securing it with bolts.
     
   • Refill Fluids: Add the recommended type and amount of transmission fluid.
     
   • Test Operation: Start the forklift and test all gears for proper engagement and operation.
     

Maintenance Tips to Extend Transmission Life

• Regular Fluid Changes: Change transmission fluid at intervals recommended by the manufacturer to remove contaminants and maintain lubrication.
  
• Monitor Fluid Levels: Regularly check fluid levels and top up as necessary to ensure proper lubrication and cooling.
  
• Inspect Seals and Hoses: Periodically check for leaks and replace worn seals and hoses promptly.
  
• Avoid Overloading: Do not exceed the forklift's rated capacity to prevent undue stress on the transmission.
  

Conclusion
Rebuilding the torque converter transmission of the Case 585C forklift is a meticulous process that requires attention to detail and adherence to safety protocols. By following the outlined steps and maintenance tips, operators can ensure the longevity and reliability of their equipment, minimizing downtime and repair costs. Always consult the manufacturer's service manual for specific instructions and torque specifications. With proper care and maintenance, the Case 585C can continue to serve as a dependable asset in various industrial applications.