Troubleshooting the Dresser TD15E Dozer: Addressing Starting and Cranking Issues

[MikePhua]

   

Introduction
The Dresser TD15E dozer, a robust machine from the late 1980s, is renowned for its durability and performance in heavy-duty applications. However, like all machinery, it can encounter issues over time. A common problem reported by operators is the inability to start or crank the engine, often characterized by a single "click" sound when attempting to start. This guide delves into potential causes and solutions for this issue, drawing insights from real-world experiences and technical expertise.
Understanding the Problem
When a Dresser TD15E dozer fails to start or crank, and only a click is heard, it typically indicates an issue with the starting system. This could be due to a faulty starter motor, solenoid, battery, or electrical connections. In some cases, the engine may be seized, preventing the starter from turning.
Potential Causes and Solutions

1. Battery Issues
   • Cause: A weak or discharged battery can lack the necessary power to engage the starter motor.
     
   • Solution: Ensure the battery is fully charged and in good condition. If the battery is old or damaged, consider replacing it.
     
2. Faulty Starter Motor
   • Cause: A malfunctioning starter motor may fail to engage or turn the engine over.
     
   • Solution: Remove the starter motor and bench-test it to confirm its operation. If defective, replace it with a compatible unit.
     
3. Defective Solenoid
   • Cause: The solenoid acts as a switch to engage the starter motor. If it's faulty, it may not complete the circuit.
     
   • Solution: Test the solenoid for continuity. If it fails, replace it.
     
4. Electrical Connections
   • Cause: Loose or corroded battery terminals or ground connections can impede current flow.
     
   • Solution: Inspect and clean all electrical connections, ensuring they are tight and free from corrosion.
     
5. Engine Seizure
   • Cause: Internal engine issues, such as stuck valves or lack of lubrication, can cause the engine to seize.
     
   • Solution: Attempt to manually rotate the engine using a wrench on the crankshaft pulley bolt. If the engine turns over, address any internal issues.
     

Case Study: A Real-World Example
An operator reported that after the dozer had been idle for several years, it failed to start. The starter motor would click but not engage. Upon inspection, the battery was found to be discharged, and the starter motor was seized. After replacing the battery and starter motor, the dozer started without issues.
Conclusion
Addressing starting and cranking issues in the Dresser TD15E dozer involves a systematic approach to diagnose and rectify potential problems. By ensuring the battery is charged, the starter motor and solenoid are functioning correctly, electrical connections are secure, and the engine is not seized, operators can restore the dozer to optimal performance. Regular maintenance and timely interventions can prolong the life of the equipment and prevent unexpected downtimes.