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Dresser TD20E Crawler Tractor: A Legacy of Power and Durability
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Introduction
The Dresser TD20E crawler tractor stands as a testament to engineering excellence in the heavy equipment industry. Manufactured during the 1980s, this machine was designed to meet the rigorous demands of construction, mining, and land-clearing operations. Its robust build and powerful performance have made it a sought-after model among collectors and operators alike.
Historical Context and Development
The TD20E was part of the TD-20 series, succeeding earlier models like the TD20C. Dresser, a company known for its heavy machinery, aimed to enhance the capabilities of its crawler tractors to cater to more demanding tasks. The TD20E incorporated advancements in engine technology, hydraulics, and operator comfort, reflecting the industry's evolution towards more efficient and user-friendly equipment.
Specifications and Features
  • Engine: Cummins NTA-855, 6-cylinder turbocharged diesel engine.
  • Displacement: 855 cubic inches (14.0 liters).
  • Net Power: Approximately 210–220 horsepower.
  • Transmission: 3-speed powershift with torque converter.
  • Final Drives: Planetary reduction.
  • Hydraulic System: Open-center system with a pump flow of approximately 45 GPM and relief pressure of 2,500 PSI.
  • Blade Options: 6-way Power Angle Tilt (PAT) blade or semi-U/dozer blade.
  • Operating Weight: Approximately 47,524 lbs.
  • Dimensions:
    • Length: 14 ft 9 in.
    • Width: 8 ft 4 in.
    • Height: 10 ft 5 in.
    • Track Gauge: 84 in.
    • Ground Clearance: 18 in.
  • Drawbar Pull: Over 70,000 lbs.
Performance and Capabilities
The TD20E was engineered for high productivity in challenging environments. Its powerful engine and advanced hydraulics allowed it to perform tasks such as heavy earthmoving, grading, and land clearing with efficiency. The machine's design focused on durability, ensuring it could withstand the rigors of demanding job sites.
Maintenance and Common Issues
Like all heavy machinery, the TD20E requires regular maintenance to ensure optimal performance. Common maintenance tasks include:
  • Engine Oil and Filter Changes: Regularly replacing engine oil and filters to maintain engine health.
  • Hydraulic Fluid and Filter Replacement: Ensuring the hydraulic system operates efficiently.
  • Final Drive Inspections: Checking for wear and replacing components as necessary.
  • Undercarriage Maintenance: Inspecting and maintaining the undercarriage to prevent premature wear.
Operators have reported issues such as hydraulic control lag or drift, transmission slipping, and track adjuster failures. These can often be addressed with specific parts like pilot valve or seal kits, transmission clutch packs, and recoil springs.
Operator Experience and Community Insights
Operators have shared their experiences with the TD20E, highlighting both its strengths and areas for attention. For instance, one operator noted that after purchasing a 1980 Dresser TD-20E, the machine operated well but exhibited slightly weak power. This could be attributed to factors such as engine health, turbocharger performance, or fuel system issues. Regular maintenance and thorough inspections are recommended to address such concerns.
Legacy and Collectibility
The Dresser TD20E's robust construction and performance have cemented its place in the history of heavy machinery. While production numbers are not readily available, the machine's enduring presence in the field and among collectors speaks to its lasting impact. For instance, a notable auction featured a 1989 Dresser TD20E, indicating ongoing interest in this model.
Conclusion
The Dresser TD20E crawler tractor remains a significant model in the lineage of heavy equipment. Its combination of power, durability, and advanced features made it a valuable asset on job sites during its production years and continues to be appreciated by operators and collectors today. Regular maintenance and attention to common issues can ensure that the TD20E remains a reliable machine for years to come.
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