Troubleshooting Warning Lights on Bobcat 873 Skid Steer

[MikePhua]

When operating a Bobcat 873 skid steer loader, encountering a warning light on the dashboard can be alarming, especially for those who are not familiar with the system. Warning lights are essential for alerting the operator to potential issues with the machine, and understanding what they mean can help prevent costly repairs or even catastrophic failures. This article provides a detailed guide on troubleshooting warning lights on the Bobcat 873, explaining what these lights indicate, their potential causes, and how to resolve them.
The Importance of Warning Lights in Skid Steers
Modern skid steer loaders, like the Bobcat 873, are equipped with a variety of sensors and diagnostic systems that monitor the machine’s performance. Warning lights serve as an early warning system for operators, alerting them to issues that could affect the safety and performance of the machine. These lights are crucial because they help prevent further damage by alerting the operator before a small problem turns into a major one.
When a warning light illuminates, it’s important to take immediate action to diagnose the issue. Ignoring warning lights can lead to more expensive repairs, increased downtime, and in some cases, irreversible damage to the equipment.
Common Warning Lights on the Bobcat 873
The Bobcat 873 has a variety of warning lights that indicate different issues with the machine’s systems. Below are some of the most common warning lights you might encounter and what they mean.
1. Engine Warning Light

• What it Indicates: This light often indicates that there’s an issue with the engine, such as low oil pressure, overheating, or a problem with the engine’s electrical system.
  
• Potential Causes: Low oil level, faulty oil pressure sensor, overheating due to a clogged radiator, or electrical malfunction.
  
• Solution: Check the oil level and top it off if necessary. Inspect the cooling system for any blockages. If the issue persists, further diagnostic checks on the engine sensors and wiring may be needed.
  

2. Hydraulic Pressure Warning Light

• What it Indicates: This light signals a problem with the hydraulic system, which could lead to a loss of power in the loader arms, bucket, or other attachments.
  
• Potential Causes: Low hydraulic fluid levels, clogged hydraulic filters, a malfunctioning hydraulic pump, or a leak in the hydraulic system.
  
• Solution: Check the hydraulic fluid levels and top them off if low. Inspect the hydraulic lines for any visible leaks or damage. If the problem is still unresolved, the hydraulic pump or valve may need further inspection.
  

3. Battery Warning Light

• What it Indicates: The battery warning light typically illuminates when the machine is experiencing electrical issues, such as a weak battery, alternator failure, or a charging system problem.
  
• Potential Causes: A dead or weak battery, faulty alternator, or loose or corroded battery connections.
  
• Solution: Check the battery charge and ensure the connections are clean and tight. Test the alternator and the charging system to ensure they are functioning properly. If necessary, replace the battery or alternator.
  

4. Temperature Warning Light

• What it Indicates: The temperature warning light indicates that the engine is running too hot, which can lead to overheating and severe engine damage.
  
• Potential Causes: Insufficient coolant, a malfunctioning thermostat, a clogged radiator, or a faulty temperature sensor.
  
• Solution: Check the coolant level and ensure it’s at the appropriate level. Inspect the radiator for any debris or blockages that might be causing poor airflow. If the issue persists, test the thermostat and temperature sensor.
  

5. Fuel Filter Warning Light

• What it Indicates: This light indicates that the fuel filter is clogged or restricted, which can cause poor fuel delivery to the engine.
  
• Potential Causes: A dirty or clogged fuel filter.
  
• Solution: Inspect and replace the fuel filter if necessary. Regular maintenance and replacing the fuel filter every 500-1000 hours can help prevent this issue.
  

6. Low Fluid Level Light

• What it Indicates: This warning light typically indicates low fluid levels in systems like the engine oil, hydraulic fluid, or coolant.
  
• Potential Causes: Low fluid levels in any of the critical systems.
  
• Solution: Check the oil, hydraulic fluid, and coolant levels, and top them off as needed. Regular checks of fluid levels are important to keep the machine running smoothly.
  

Steps to Take When a Warning Light Appears
When a warning light appears on your Bobcat 873, here are the general steps you should follow to address the issue:

1. Stop the Machine: If you notice a warning light, the first step is to stop operating the machine and turn off the engine. This will help prevent further damage and allow you to address the issue safely.
   
2. Consult the Owner’s Manual: Every warning light and its meaning are typically listed in the owner’s manual. The manual will also provide troubleshooting steps and solutions for specific warning lights, making it easier to diagnose the issue.
   
3. Check Fluid Levels: Many warning lights indicate low fluid levels. Check the engine oil, hydraulic fluid, coolant, and fuel levels. If any fluid is low, top it off and monitor the machine to see if the warning light goes off.
   
4. Inspect the System: If the fluid levels are adequate, check the corresponding system for any visible issues. For example, check for leaks in the hydraulic system, inspect the battery and wiring, and ensure there are no clogs or blockages in the cooling system.
   
5. Perform Diagnostic Checks: If the problem persists, run diagnostic tests using a scanner or diagnostic tool. This can help identify specific issues with the machine’s electrical or hydraulic systems.
   
6. Consult a Professional: If you’re unable to resolve the issue on your own, it’s important to consult a professional mechanic or technician who can perform a more thorough inspection and make any necessary repairs.
   

Preventive Maintenance Tips
Regular maintenance is key to preventing warning lights from appearing and ensuring the longevity of your Bobcat 873. Here are some preventive maintenance tips:

• Check Fluids Regularly: Ensure that fluid levels (engine oil, hydraulic oil, coolant, and fuel) are maintained at the correct levels. Regularly check for leaks in the system.
  
• Replace Filters on Schedule: Replace the hydraulic, fuel, and air filters according to the manufacturer’s recommended schedule to avoid clogs that can lead to performance issues.
  
• Inspect the Battery and Electrical System: Clean the battery terminals, check for corrosion, and test the charging system to ensure everything is functioning correctly.
  
• Clean the Cooling System: Keep the radiator and cooling system free of debris, and ensure that the fan is functioning properly to prevent overheating.
  

Conclusion
Understanding the meaning behind warning lights on your Bobcat 873 skid steer is crucial for maintaining its performance and preventing costly repairs. By addressing issues as soon as they arise, you can keep your machine running smoothly and extend its lifespan. Whether you’re dealing with low fluid levels, hydraulic system issues, or electrical faults, following the troubleshooting steps outlined above will help you diagnose and resolve problems efficiently. Regular preventive maintenance is also essential to keep your Bobcat 873 in top working condition, ensuring that warning lights are less likely to appear in the first place.