2001 Bobcat 873: Troubleshooting Starting Issues

[MikePhua]

Introduction
The 2001 Bobcat 873 skid steer is a popular machine known for its power and versatility in construction, landscaping, and material handling. However, like any heavy equipment, it can occasionally experience issues that prevent it from starting. One of the more perplexing issues that operators may face is a sudden failure to start, often occurring seemingly out of the blue. This article explores the common causes behind starting trouble with the 2001 Bobcat 873 and provides tips on how to troubleshoot and resolve the issue.
Understanding the Issue
When a Bobcat 873 suddenly fails to start, it can be frustrating for operators who rely on the machine to get the job done. The problem could stem from various components within the starting system, including the battery, starter motor, ignition system, or even the wiring. Often, the issue isn’t immediately obvious, and troubleshooting can take some time to pinpoint.
Common Causes of Starting Trouble

1. Battery Problems
   One of the most frequent causes of starting trouble is a weak or dead battery. A battery that has lost charge or is near the end of its lifespan can prevent the engine from cranking properly, even if everything else seems in working order.
   • Signs of Battery Issues:
     • No cranking or slow cranking when turning the key
       
     • Dim or flickering lights on the control panel
       
     • Clicking sound when trying to start
       
   • Solution:
     First, check the battery voltage using a multimeter. A healthy battery should read about 12.6 volts or higher when fully charged. If the voltage is low, try charging the battery or jump-starting the machine. If the battery is old or damaged, it may need to be replaced.
     
2. Starter Motor Failure
   Another common culprit for starting issues is the starter motor. If the starter motor is faulty, the engine may not turn over, even if the battery is fully charged.
   • Signs of Starter Motor Issues:
     • Clicking noise when attempting to start
       
     • No sound at all (silent failure)
       
     • A grinding noise (if the starter is partially working)
       
   • Solution:
     Check the starter motor by testing the voltage at the starter terminals while attempting to start the engine. If there is no voltage or insufficient voltage, the starter motor might need repair or replacement.
     
3. Fuel System Issues
   Fuel delivery problems can also prevent a Bobcat 873 from starting. If the fuel filter is clogged, the fuel pump is malfunctioning, or the fuel lines are blocked, the engine may not receive the proper fuel pressure to start.
   • Signs of Fuel Issues:
     • Engine cranks but doesn't start
       
     • Smell of fuel around the engine or under the skid steer
       
     • Poor engine performance prior to starting issues
       
   • Solution:
     Inspect the fuel filter for clogs and replace it if necessary. Check the fuel lines for any leaks, cracks, or blockages. If the fuel system seems fine, the fuel pump might be the issue, in which case it should be tested for proper operation.
     
4. Ignition System Failure
   A malfunctioning ignition system can also prevent the Bobcat 873 from starting. This could be caused by faulty ignition switches, worn-out spark plugs, or damaged ignition coils.
   • Signs of Ignition Issues:
     • Engine cranks but fails to fire
       
     • Spark plugs appear dirty or worn
       
     • Intermittent starting (starts sometimes, but not consistently)
       
   • Solution:
     Inspect the spark plugs and ignition wires for any signs of wear or damage. Replace spark plugs if necessary. Check the ignition switch and wiring for proper connections. If the ignition coil is faulty, replace it as well.
     
5. Wiring and Electrical Issues
   Electrical problems such as loose or corroded wiring connections can lead to starting problems. Even a slight issue with the wiring can prevent the machine from getting the necessary electrical signals to start the engine.
   • Signs of Electrical Issues:
     • Inconsistent power delivery to the dashboard or other electrical components
       
     • Flickering or dimmed lights
       
     • No power at all to the ignition switch
       
   • Solution:
     Perform a visual inspection of the wiring, focusing on connectors, fuses, and relays. Look for any signs of corrosion, fraying, or loose connections. If you find damaged or corroded wires, replace or clean them as needed.
     

Additional Troubleshooting Tips

• Check the Safety Switches:
  The Bobcat 873 is equipped with several safety switches that prevent the machine from starting if certain conditions aren’t met. These include the seat belt switch, parking brake switch, and neutral safety switch. Ensure that all safety switches are engaged and functioning correctly.
  
• Verify the Engine Kill Switch:
  Some models of the Bobcat 873 are equipped with an engine kill switch that may have been inadvertently triggered. Check that the switch is in the "run" position.
  
• Test the Glow Plugs (For Diesel Models):
  If your Bobcat 873 is a diesel model, faulty glow plugs can prevent the engine from starting, especially in cold weather. Test the glow plugs to ensure they are working properly, and replace any that are malfunctioning.
  

Conclusion
Starting issues with the 2001 Bobcat 873 can be frustrating, but with a systematic approach, most problems can be diagnosed and resolved. Begin by checking the battery, starter motor, fuel system, and ignition system. Ensure that wiring and electrical components are in good condition, and verify that all safety switches are functioning properly. By following these troubleshooting steps, operators can quickly get their Bobcat 873 back up and running, reducing downtime and ensuring the machine performs as expected.