Troubleshooting Bobcat T62 Track Skid Steer: No Start Issue

[MikePhua]

The Bobcat T62 track skid steer is a versatile and powerful machine, well-regarded for its performance in a variety of tasks, from digging and lifting to clearing and material handling. However, like any mechanical equipment, it is not immune to technical issues. One common problem experienced by owners of the Bobcat T62 is the "no start" issue, where the engine fails to start despite all efforts. This guide will help you troubleshoot and identify potential causes of a no-start problem, as well as provide solutions to get your machine up and running again.
Common Causes of No Start in Bobcat T62 Skid Steer
When dealing with a "no start" issue, several components could be at fault. The following sections outline the most common causes and how to address them.
1. Battery Issues

• Symptoms: If the machine doesn't start or only attempts to start briefly before shutting down, it's likely due to a dead or weak battery. You may also notice dim lights or other electrical failures.
  
• Possible Causes:
  • Low or dead battery charge
    
  • Corroded battery terminals
    
  • Faulty battery cables
    
• Solutions:
  • First, check the battery charge. If it is low, try jump-starting the machine or replacing the battery.
    
  • Inspect the battery terminals for corrosion. If necessary, clean the terminals using a wire brush and a mixture of baking soda and water. Ensure the battery cables are securely connected to the battery terminals.
    
  • If the battery is older or damaged, replace it with a new one that meets the manufacturer’s specifications.
    

2. Faulty Starter Motor or Solenoid

• Symptoms: If the engine does not turn over when you attempt to start the machine, the issue may lie with the starter motor or solenoid.
  
• Possible Causes:
  • Worn-out starter motor
    
  • Faulty solenoid preventing the flow of electricity to the starter
    
• Solutions:
  • Check for power to the starter motor. If you hear a clicking noise when turning the key, it may indicate a bad solenoid. In this case, replacing the solenoid should resolve the issue.
    
  • If the starter motor appears to be malfunctioning, it may need to be replaced.
    

3. Fuel Delivery Problems

• Symptoms: If the engine cranks but does not start, the problem could be related to fuel delivery. Signs of a fuel-related issue include the engine attempting to start and then stalling.
  
• Possible Causes:
  • Empty fuel tank or low fuel level
    
  • Clogged fuel filter or fuel lines
    
  • Malfunctioning fuel pump
    
• Solutions:
  • Verify that there is enough fuel in the tank. If the fuel gauge reads low, fill the tank with fresh fuel and try again.
    
  • Inspect the fuel filter for blockages. If it’s clogged, replace it with a new filter.
    
  • Test the fuel pump to ensure it is working properly. If the fuel pump is faulty, it may need to be replaced.
    

4. Ignition System Failure

• Symptoms: If the engine does not start but there is power to the battery and no issues with the fuel system, the ignition system could be at fault.
  
• Possible Causes:
  • Worn-out spark plug or ignition coil
    
  • Faulty ignition switch or fuse
    
• Solutions:
  • Inspect the spark plugs for wear or fouling. If they are dirty or damaged, clean or replace them as necessary.
    
  • Test the ignition coil to ensure it is working properly. If there is no spark from the coil, replace it.
    
  • Check the ignition switch and fuse box for any blown fuses or malfunctioning switches. Replace any faulty components.
    

5. Safety Switches or Interlock System Malfunctions

• Symptoms: The Bobcat T62 may fail to start if one of the safety switches or interlock systems is malfunctioning. These systems are designed to prevent the machine from starting under unsafe conditions.
  
• Possible Causes:
  • Faulty seat switch (if operator is not seated)
    
  • Malfunctioning neutral safety switch (if machine is not in neutral)
    
  • Hydraulic pressure safety switches
    
• Solutions:
  • Ensure that the seat switch is not malfunctioning, as it is designed to detect whether the operator is in the seat.
    
  • Verify that the machine is in the neutral position before attempting to start it. If the neutral safety switch is defective, it may need to be replaced.
    
  • Check the hydraulic system’s pressure safety switches to ensure that they are working correctly.
    

6. Engine Control Module (ECM) Issues

• Symptoms: If all other systems appear to be functioning properly but the machine still fails to start, the problem may be related to the engine control module (ECM).
  
• Possible Causes:
  • Faulty ECM
    
  • ECM not receiving a signal from other components
    
• Solutions:
  • If the ECM is suspected to be the issue, it may need to be tested or reprogrammed by a professional technician.
    
  • Ensure all electrical connections to the ECM are secure and free from corrosion.
    

7. Faulty Fuses or Relays

• Symptoms: A blown fuse or faulty relay can cause a no-start condition, as the system will fail to supply power to key components like the starter motor, fuel system, or ignition system.
  
• Possible Causes:
  • Blown fuses
    
  • Faulty relays
    
• Solutions:
  • Check the fuse box for any blown fuses. If a fuse is blown, replace it with one of the correct amperage.
    
  • Test relays to ensure that they are functioning properly. Replace any relays that are faulty.
    

Step-by-Step Troubleshooting Process

1. Check the Battery: Start by checking the battery for charge and clean connections.
   
2. Inspect the Starter Motor and Solenoid: If the battery is good, test the starter motor and solenoid.
   
3. Test the Fuel System: Ensure there is enough fuel in the tank, and check the fuel filter and pump.
   
4. Examine the Ignition System: Inspect spark plugs, ignition coils, and fuses.
   
5. Verify Safety Switches and Interlocks: Ensure all safety switches are functioning, especially the seat and neutral switches.
   
6. Check the ECM: If everything else fails, the ECM may need attention.
   

Conclusion
The Bobcat T62 track skid steer is a powerful and reliable machine, but when faced with a no-start issue, it can be frustrating. By following a systematic approach to troubleshooting, operators can identify and resolve the root cause of the problem. Whether it’s a dead battery, a fuel system blockage, or a faulty safety switch, addressing these issues promptly will help keep the skid steer running smoothly and efficiently. Always follow the manufacturer’s guidelines and consult a professional technician when needed to avoid further damage to your equipment.