Troubleshooting Bobcat 751 Stopping Abruptly While Driving

[MikePhua]

The Bobcat 751 skid steer loader is a versatile and reliable machine used in various industries. However, like any piece of equipment, it may experience issues from time to time. One common issue reported by owners is the machine stopping abruptly while driving. This problem can be caused by a variety of factors, and this article will explore potential causes and troubleshooting steps to help resolve the issue.
Potential Causes of the Bobcat 751 Stopping Abruptly

1. Fuel System Problems:
   • A common reason for a machine to stop unexpectedly is a fuel delivery issue. If there’s a blockage in the fuel line or a failing fuel pump, the engine may not receive the proper amount of fuel, causing it to stall.
     
   • Solution:
     • Check the fuel tank for any signs of contamination or debris.
       
     • Inspect the fuel lines for any leaks, cracks, or blockages.
       
     • Test the fuel pump to ensure it is operating correctly and supplying enough fuel to the engine.
       
2. Electrical Issues:
   • Electrical problems such as a faulty ignition switch, blown fuses, or issues with the alternator can cause the Bobcat 751 to stop abruptly.
     
   • Solution:
     • Check the ignition switch for proper functionality.
       
     • Inspect the fuses and replace any that are blown.
       
     • Test the alternator to ensure it is generating sufficient power to run the machine.
       
3. Battery and Charging System Problems:
   • A weak or dead battery, or an issue with the charging system, can cause the machine to shut down suddenly. The Bobcat 751 relies on its battery for starting and running, and any issues here could lead to an abrupt stop.
     
   • Solution:
     • Inspect the battery for signs of corrosion or damage.
       
     • Test the battery voltage to ensure it is holding a proper charge.
       
     • Check the charging system and alternator for functionality, ensuring the battery is receiving a proper charge during operation.
       
4. Hydraulic System Malfunction:
   • The hydraulic system plays a critical role in the movement and operation of the Bobcat 751. A failure in the hydraulic system can cause the machine to stop unexpectedly, especially if there’s a loss of hydraulic pressure or fluid.
     
   • Solution:
     • Check the hydraulic fluid levels and top up if necessary.
       
     • Inspect the hydraulic lines for leaks or damage.
       
     • Test the hydraulic pump and valves to ensure proper pressure and flow.
       
5. Transmission or Drive Issues:
   • If the Bobcat 751 experiences issues with its transmission or drive system, it may stop while in motion. This could be due to a mechanical failure, low fluid levels, or worn components.
     
   • Solution:
     • Check the transmission fluid levels and add fluid if necessary.
       
     • Inspect the transmission for any signs of wear or damage.
       
     • Test the drive components, including the drive motor and axles, for any faults.
       
6. Overheating:
   • Overheating can also cause the Bobcat 751 to stop suddenly. If the engine or hydraulic system overheats, it will automatically shut down to prevent further damage.
     
   • Solution:
     • Check the cooling system, including the radiator and coolant levels.
       
     • Inspect the cooling fan and ensure it is functioning correctly.
       
     • Clean any dirt or debris that may be obstructing airflow to the cooling system.
       

Step-by-Step Troubleshooting Process

1. Step 1: Check the Fuel System
   • Start by inspecting the fuel tank for any issues, such as low fuel or contamination. Ensure that the fuel lines are clear and that the fuel filter is not clogged. If the fuel system appears to be the problem, consider replacing the filter or cleaning the lines.
     
2. Step 2: Inspect Electrical Components
   • Test the ignition system and check all fuses and wiring for any signs of failure. If the machine is not starting at all, pay special attention to the battery and charging system to ensure they are functioning correctly.
     
3. Step 3: Evaluate the Hydraulic System
   • Check the hydraulic fluid levels and look for any leaks in the hydraulic lines. If there’s a loss of pressure, the system may need to be flushed, or the pump may need to be replaced.
     
4. Step 4: Examine the Drive Components
   • Inspect the transmission fluid and check for any obvious mechanical issues. If the drive system seems to be malfunctioning, further investigation is required, and it may be necessary to consult a technician for a more detailed inspection.
     
5. Step 5: Monitor for Overheating
   • Check the temperature gauge to see if the engine or hydraulic system is overheating. Inspect the cooling system, clean out any debris, and top up the coolant to the recommended levels.
     

Preventative Maintenance Tips

1. Regular Fuel System Maintenance:
   • Replace the fuel filter regularly and inspect the fuel system for leaks or contamination. Keeping the fuel system clean can prevent many issues related to stalling.
     
2. Routine Electrical System Checks:
   • Regularly check the battery, fuses, and alternator to ensure the electrical system is working as expected. This can help prevent sudden shutdowns caused by electrical faults.
     
3. Hydraulic System Inspections:
   • Inspect hydraulic fluid levels and hoses frequently. Regularly check for leaks or signs of wear to prevent hydraulic issues.
     
4. Transmission and Drive System Maintenance:
   • Keep the transmission fluid at the proper level and regularly inspect the drive components to ensure smooth operation.
     

Conclusion
If your Bobcat 751 stops abruptly while driving, it can be due to a variety of factors, including fuel system issues, electrical faults, hydraulic malfunctions, drive system problems, or overheating. By following a systematic troubleshooting process and performing regular maintenance, you can identify and resolve the issue quickly. Always refer to the manufacturer’s manual for specific guidance and consult a professional technician if necessary.