Takeuchi TL140 Hard Starting and Losing Prime: Causes and Solutions

[MikePhua]

Introduction
The Takeuchi TL140 compact track loader is a robust piece of machinery used for various construction and landscaping tasks. However, one issue that operators may encounter is hard starting or the machine losing prime. This can lead to difficulties starting the engine and reduced performance. Understanding the possible causes and troubleshooting steps can help operators resolve these issues and restore the loader to optimal functioning.
Common Causes of Hard Starting and Losing Prime
Several factors can contribute to the problem of hard starting or losing prime in the Takeuchi TL140. Identifying the root cause is essential for effective troubleshooting. The most common causes include:

1. Fuel System Issues:
   • One of the primary causes of hard starting and losing prime is a fuel system issue, such as air entering the fuel lines or a clogged fuel filter. If the fuel lines are not properly sealed or the fuel filter is blocked, it can prevent the proper flow of fuel to the engine, leading to difficulty starting and loss of prime.
     
2. Faulty Fuel Lift Pump:
   • The fuel lift pump is responsible for delivering fuel from the tank to the engine. A malfunctioning lift pump can result in insufficient fuel delivery, causing the engine to lose prime and fail to start.
     
3. Air in the Fuel Lines:
   • Air entering the fuel system can cause the engine to lose prime and lead to hard starting. This could be due to loose or damaged fuel lines, or a malfunctioning fuel filter assembly that allows air to seep into the system.
     
4. Clogged Fuel Filter:
   • A clogged fuel filter restricts the flow of fuel to the engine, which can make starting difficult and cause the system to lose prime. Over time, debris and contaminants in the fuel can clog the filter and reduce fuel delivery efficiency.
     
5. Fuel Contamination:
   • Contaminated fuel, such as water or dirt in the tank, can lead to improper combustion and hard starting. Fuel contamination can also cause damage to the fuel system and engine components over time.
     
6. Fuel Injector Problems:
   • If the fuel injectors are clogged or malfunctioning, they may not provide the correct fuel mixture to the engine, causing difficulty starting and a loss of prime.
     
7. Battery or Electrical Issues:
   • While not directly related to fuel, electrical issues such as a weak battery or faulty connections can affect the fuel system’s operation. If the electrical components are not providing adequate power to the fuel lift pump or other systems, it may result in hard starting.
     

Diagnosing the Problem
To effectively diagnose the issue of hard starting and losing prime, operators should follow a step-by-step approach:

1. Check the Fuel System for Leaks:
   • Start by inspecting the fuel lines, fittings, and fuel tank for any signs of leaks. If fuel is leaking, it may cause air to enter the system, which can lead to a loss of prime and hard starting.
     
2. Inspect the Fuel Filter:
   • Examine the fuel filter for any signs of clogs or damage. A clogged filter restricts fuel flow, causing the engine to lose prime. If the filter is dirty or worn out, replace it with a new one.
     
3. Test the Fuel Lift Pump:
   • Check the operation of the fuel lift pump by turning the engine over and observing the fuel delivery. If the pump is not delivering enough fuel, it may need to be replaced.
     
4. Bleed the Fuel System:
   • If air has entered the fuel system, bleeding the system can help remove the trapped air and restore the proper fuel flow. Refer to the machine’s service manual for the proper procedure to bleed the system.
     
5. Examine the Fuel Tank for Contamination:
   • Inspect the fuel in the tank for any signs of contamination, such as water or dirt. If contamination is found, drain the tank, clean it thoroughly, and refill it with clean fuel.
     
6. Check the Battery and Electrical Connections:
   • Ensure that the battery is fully charged and that all electrical connections are secure. If the battery is weak or there are electrical issues, the fuel lift pump and other components may not function properly.
     
7. Inspect the Fuel Injectors:
   • If all other systems are functioning correctly, but the engine still has trouble starting, check the fuel injectors for clogs or malfunctions. If necessary, have the injectors cleaned or replaced.
     

Solutions to Address the Problem
Once the cause of the issue is identified, the following solutions can help resolve the hard starting and loss of prime:

1. Seal Fuel Line Leaks:
   • If leaks are found in the fuel system, replace any damaged lines, seals, or fittings. Properly sealing the fuel lines will prevent air from entering the system and ensure a steady fuel flow.
     
2. Replace the Fuel Filter:
   • If the fuel filter is clogged or damaged, replace it with a new one. A clean filter will allow for proper fuel flow and improve starting performance.
     
3. Replace the Fuel Lift Pump:
   • If the fuel lift pump is not delivering fuel properly, replace it with a new, compatible pump. This will restore proper fuel pressure and prevent the engine from losing prime.
     
4. Clean the Fuel Tank:
   • Drain the fuel tank and clean it thoroughly if contamination is found. Refill the tank with clean fuel and add a fuel additive if necessary to help prevent future contamination.
     
5. Replace the Battery:
   • If the battery is weak or damaged, replace it with a new, fully charged battery. Ensure that the battery is providing enough power for the fuel system and other components to operate.
     
6. Bleed the Fuel System:
   • After repairing any leaks or replacing parts, bleed the fuel system to remove any air pockets and restore fuel flow. Follow the manufacturer's recommended procedure for bleeding the system.
     

Preventing Future Issues
To avoid recurring problems with hard starting and losing prime in the Takeuchi TL140, consider these preventive measures:

1. Regular Fuel System Maintenance:
   • Regularly check the fuel system for leaks, clogs, and contamination. Replacing the fuel filter at recommended intervals and inspecting the fuel lines can prevent many common issues.
     
2. Use Clean Fuel:
   • Always use high-quality, clean fuel in the machine. Contaminated fuel can cause problems with the fuel system and lead to difficulty starting the engine.
     
3. Monitor Battery Health:
   • Regularly check the battery and electrical connections to ensure they are in good condition. A well-maintained battery will provide reliable power to the fuel system and other electrical components.
     
4. Follow Manufacturer's Maintenance Schedule:
   • Adhere to the maintenance schedule outlined in the service manual. Regular servicing can catch potential problems early, preventing them from developing into more serious issues.
     

Conclusion
Hard starting and loss of prime in the Takeuchi TL140 can be caused by issues with the fuel system, including fuel line leaks, a faulty fuel pump, clogged filters, or contaminated fuel. By carefully diagnosing and addressing these issues, operators can restore the machine’s functionality and prevent future problems. Regular maintenance and attention to the fuel system will ensure that the TL140 continues to operate efficiently and reliably on the job site.