Troubleshooting Bobcat T190 Dies When Lifting or Curling the Bucket

[MikePhua]

The Bobcat T190, a popular skid steer loader, is known for its robust performance in various construction and agricultural tasks. However, like all machines, it can encounter issues that impact its operation. One of the most common problems reported by users is the engine dying when lifting or curling the bucket. This problem can lead to significant downtime, affecting the productivity of any job site. In this article, we will explore the potential causes of this issue, offer troubleshooting advice, and provide best practices for maintenance and repairs.
Understanding the Problem: Bobcat T190 Dies When Lifting or Curling the Bucket
The Bobcat T190 is equipped with hydraulic systems that control the lift arms and bucket. These systems rely on a combination of mechanical and electronic components to ensure smooth operation. When the loader dies during specific operations like lifting or curling the bucket, it suggests a disruption in the hydraulic or fuel system, both of which play a critical role in the machine’s overall functionality.
Possible Causes of the Issue
There are several potential causes that could lead to the Bobcat T190 stalling or shutting down when performing tasks like lifting or curling the bucket. Below are the most likely culprits:
1. Hydraulic System Issues
The Bobcat T190 relies on a hydraulic system to operate its lift arms and bucket. If there is an issue with the hydraulics, it can cause the engine to stall. Some common hydraulic system issues include:

• Hydraulic Fluid Levels: Low hydraulic fluid levels can prevent the system from functioning properly, putting extra strain on the engine when it tries to lift or curl the bucket.
  
• Hydraulic Fluid Contamination: If the hydraulic fluid becomes contaminated with dirt, water, or other debris, it can cause blockages or uneven pressure distribution, leading to poor performance or system failures.
  
• Faulty Hydraulic Pump or Motor: The hydraulic pump is responsible for circulating fluid throughout the system. A faulty pump or motor can prevent the fluid from reaching critical components, causing the engine to stall under load.
  
• Clogged Filters: Hydraulic filters that are clogged with debris or old fluid can restrict the flow of hydraulic fluid, leading to a lack of pressure when lifting or curling the bucket.
  

2. Fuel System Problems
The fuel system of the Bobcat T190 can also contribute to the engine dying when lifting or curling the bucket. The following fuel system problems may cause stalling:

• Dirty Fuel Filters: A clogged fuel filter can restrict the flow of fuel to the engine, leading to insufficient power when under load, such as when lifting or curling the bucket.
  
• Air in the Fuel System: Air pockets in the fuel lines can cause the engine to run erratically and stall when the load increases. This may happen if the fuel tank is too low or if there is a leak in the fuel line.
  
• Fuel Pump Malfunction: A malfunctioning fuel pump may not be able to deliver adequate fuel to the engine under load, resulting in stalling during operations that demand high power.
  

3. Electrical System Faults
The Bobcat T190 is equipped with an electrical system that controls various components, including the engine, hydraulic controls, and safety features. If the electrical system is malfunctioning, it may lead to the engine stalling. Common electrical issues include:

• Battery or Alternator Issues: A weak battery or faulty alternator may not provide sufficient power to the electrical components, especially during operations that require significant hydraulic power. If the electrical system is not functioning correctly, the engine may shut off unexpectedly.
  
• Sensor Malfunction: The Bobcat T190 is equipped with various sensors to monitor the machine’s performance, including load sensors. If one of these sensors fails or sends faulty data, the engine may stall as a precautionary measure.
  

4. Engine Performance Issues
Sometimes, the problem could be directly related to the engine itself. A variety of engine-related issues can lead to stalling when lifting or curling the bucket:

• Low Engine Power: If the engine is not generating enough power, it may stall under heavy loads. This can be due to worn-out engine components, such as spark plugs, fuel injectors, or the turbocharger.
  
• Overheating: If the engine is overheating, it may shut down to protect itself from damage. Overheating could be caused by coolant issues, such as low coolant levels, a damaged radiator, or a malfunctioning thermostat.
  
• Exhaust Blockage: A clogged exhaust system can cause poor engine performance, leading to stalling during heavy operations. If the exhaust pipes are blocked, the engine may struggle to expel gases, resulting in loss of power and stalling.
  

Troubleshooting Steps
If your Bobcat T190 is dying when lifting or curling the bucket, follow these troubleshooting steps to identify and resolve the issue:
1. Check Hydraulic Fluid and Filters

• Inspect Fluid Levels: Start by checking the hydraulic fluid levels and topping them up if necessary. Ensure that the fluid is clean and free of contamination.
  
• Replace Filters: Check the hydraulic filters for clogs or damage. If they are dirty, replace them to ensure proper fluid flow and pressure.
  
• Test Hydraulic Pressure: Using a pressure gauge, test the hydraulic system’s pressure to ensure it’s within specifications. Low pressure may indicate issues with the pump or valves.
  

2. Inspect the Fuel System

• Replace the Fuel Filter: If the fuel filter is clogged, replace it with a new one. A dirty filter can severely restrict fuel flow, leading to engine stalling under load.
  
• Bleed the Fuel System: If air has entered the fuel system, bleed the lines to remove any trapped air pockets.
  
• Check Fuel Lines: Inspect the fuel lines for leaks or damage that could prevent proper fuel flow.
  

3. Examine the Electrical System

• Check Battery and Alternator: Ensure that the battery is fully charged and that the alternator is functioning correctly. A weak battery or faulty alternator can cause electrical failures.
  
• Test Sensors: Using a diagnostic tool, check for any malfunctioning sensors. Replace any faulty sensors that could be sending incorrect data to the engine control unit (ECU).
  

4. Assess Engine Performance

• Check for Blockages: Inspect the exhaust system for any blockages that could restrict airflow and cause the engine to stall.
  
• Inspect Cooling System: Check the coolant levels and ensure that the radiator and thermostat are working correctly. Overheating can lead to engine shutdowns.
  

Conclusion
The Bobcat T190 is a reliable machine, but like all heavy equipment, it is prone to mechanical issues. When the loader dies during specific operations like lifting or curling the bucket, it is essential to perform a thorough diagnosis to pinpoint the cause. The problem could be related to the hydraulic system, fuel system, electrical system, or engine performance.
By following the troubleshooting steps outlined above, you can identify the root cause of the issue and take corrective action. Regular maintenance and timely repairs will not only prevent unexpected breakdowns but also extend the lifespan of your Bobcat T190, ensuring it continues to perform at its best.