Troubleshooting Intermittent Starting Issues in the Volvo EC360BLC Excavator

[MikePhua]

The Volvo EC360BLC is a widely used tracked excavator, known for its durability, versatility, and impressive performance in construction, mining, and other heavy-duty industries. However, like any machine, it can sometimes encounter issues that can affect its performance. One such problem is intermittent starting—where the engine starts and then dies unexpectedly. This issue can be frustrating for operators, especially when it prevents the machine from performing its necessary tasks.
In this article, we will explore the potential causes of intermittent starting problems in the Volvo EC360BLC excavator, provide possible solutions, and offer maintenance tips to prevent future issues.
Understanding the Volvo EC360BLC Excavator
Before diving into troubleshooting, it's important to understand the key features of the Volvo EC360BLC excavator and its common uses in the field.

• Engine: The EC360BLC is powered by a Volvo D7E 6-cylinder, turbocharged diesel engine, known for its fuel efficiency and low emissions.
  
• Hydraulic System: The machine features a highly advanced hydraulic system designed to provide excellent lifting power and precision.
  
• Transmission and Drivetrain: The Volvo EC360BLC features a power-shift transmission system, designed for ease of use and durability on rough terrains.
  
• Performance: It is capable of delivering up to 225 horsepower, which makes it suitable for medium to heavy-duty tasks such as digging, grading, and lifting.
  

Despite its reputation for reliability, like many older machines, the Volvo EC360BLC can suffer from occasional issues, especially as the components age and wear out. Intermittent starting problems, in particular, can often be traced to electrical, fuel, or sensor-related issues.
Diagnosing the Issue: Possible Causes of Intermittent Starting
Several factors can contribute to intermittent starting issues in the Volvo EC360BLC. These include problems with the electrical system, fuel delivery system, and the engine management system. Below are some of the most common causes of such issues.

1. Fuel Supply Issues
   • Fuel Filters and Blockages: Over time, fuel filters can become clogged with debris, restricting the flow of fuel to the engine. If the fuel supply is inconsistent, the engine may start but die shortly after. Inspect the fuel filters for any signs of dirt or debris and replace them if necessary.
     
   • Air in the Fuel System: Air trapped in the fuel lines can also cause starting issues. This can happen due to a leak in the fuel lines or a poorly sealed fuel filter. Bleeding the fuel system to remove the air may resolve the issue.
     
2. Electrical Problems
   • Battery and Charging System: A weak or faulty battery can cause the engine to start intermittently. Check the battery voltage and condition. Ensure that the charging system is working properly to maintain the battery’s charge.
     
   • Starter Motor: A malfunctioning starter motor can cause intermittent starting problems. If the starter motor fails to engage consistently, the engine may turn over but not start. Inspect the starter motor for any visible signs of wear or electrical faults.
     
   • Wiring and Connectors: Loose or corroded electrical connections can lead to intermittent faults. Inspect all wiring and connectors for signs of corrosion or wear, especially around the ignition system and battery terminals.
     
3. Fuel Injectors and Common Rail System
   • Faulty Injectors: The fuel injectors in the EC360BLC control the timing and amount of fuel delivered to the engine. If an injector is faulty or clogged, it can cause starting issues. A diagnostic scan can help identify if one or more injectors are malfunctioning.
     
   • Fuel Pressure Regulator: If the fuel pressure regulator is not working properly, it can affect the engine’s ability to start reliably. Ensure that the fuel pressure is within the manufacturer’s recommended range.
     
4. Engine Management System (EMS)
   • Faulty Sensors: The EC360BLC is equipped with several sensors that monitor various engine parameters. A malfunctioning sensor, such as the crankshaft position sensor or the camshaft position sensor, can send incorrect signals to the engine control unit (ECU), resulting in poor starting behavior.
     
   • ECU Software Issues: The engine control unit (ECU) is responsible for regulating the engine’s performance. Occasionally, software bugs or sensor malfunctions can cause the ECU to deliver incorrect instructions to the engine, leading to intermittent starting problems.
     
5. Cold Weather and Low Temperature
   • Thickened Oil: Cold temperatures can cause engine oil to thicken, making it difficult for the engine to turn over. Use the correct type of engine oil for the ambient temperature range, especially in cold climates.
     
   • Glow Plugs: If the glow plugs are malfunctioning, the engine may have difficulty starting in colder conditions. Ensure that the glow plugs are functioning properly and replace any faulty ones.
     

Step-by-Step Troubleshooting Guide
To address the intermittent starting issue, follow these troubleshooting steps to narrow down the root cause:

1. Inspect the Fuel System:
   • Check and replace the fuel filters if necessary.
     
   • Bleed the fuel system to remove any air.
     
   • Check the fuel lines for leaks.
     
   • Test the fuel injectors and replace any that are faulty.
     
2. Examine the Electrical System:
   • Test the battery voltage and inspect the battery for wear or corrosion.
     
   • Check the starter motor for functionality.
     
   • Inspect all wiring and electrical connectors for loose connections or corrosion.
     
3. Check the Sensors and ECU:
   • Perform a diagnostic scan to check for any sensor-related errors or issues with the ECU.
     
   • Replace any faulty sensors, such as the crankshaft or camshaft position sensors.
     
4. Test the Engine Management System:
   • Verify that the ECU is functioning correctly.
     
   • Ensure that the engine timing is correct and that the system is delivering accurate signals.
     
5. Address Cold Weather Concerns:
   • Use the appropriate oil for colder temperatures.
     
   • Check the glow plugs and replace any that are faulty.
     

Prevention and Maintenance Tips
To prevent intermittent starting issues in the future, consider the following maintenance tips:

• Regularly replace fuel filters to prevent blockages.
  
• Perform routine checks on the battery and charging system to ensure consistent power supply.
  
• Inspect electrical wiring and connectors for corrosion or wear.
  
• Clean and test fuel injectors regularly to ensure proper fuel delivery.
  
• Monitor the performance of sensors and replace them as needed.
  
• Use the correct engine oil for the temperature range and ensure the glow plugs are functioning during colder months.
  

Conclusion
Intermittent starting problems in the Volvo EC360BLC can be caused by various factors, ranging from issues with the fuel system to electrical faults and sensor malfunctions. By following the troubleshooting steps outlined above and performing regular maintenance, operators can resolve these issues and prevent future occurrences. The key is to be diligent about inspecting critical components and addressing potential problems early on to keep the excavator running smoothly and efficiently. Regular attention to the fuel system, electrical system, and sensors can ensure that the Volvo EC360BLC continues to deliver reliable performance in demanding work environments.