Troubleshooting Starting Issues on the Case 70XT: New Battery and Rebuilt Starter Problems

[MikePhua]

The Case 70XT, a robust skid steer loader, is a vital machine in various industries, such as construction, landscaping, and agriculture. Despite its reliability, like any piece of heavy equipment, it can encounter issues over time, especially with its electrical and starting systems. One common problem is difficulty starting the machine, even after replacing the battery and rebuilding the starter. This article provides a detailed guide to diagnosing and fixing starting issues on the Case 70XT, drawing insights from real-world experiences, troubleshooting steps, and maintenance tips.
Understanding the Symptoms
A Case 70XT that struggles to start despite having a new Exide battery and a newly rebuilt starter can be a frustrating problem for any operator. Here’s a breakdown of common symptoms and potential causes:

• Weak Cranking or No Crank: The engine cranks slowly or doesn’t crank at all, even though the battery is fully charged and the starter has been recently rebuilt.
  
• Intermittent Starting: The machine might start occasionally but fails to do so consistently.
  
• Clicking Sound: A clicking noise may be heard when attempting to start the engine, indicating insufficient current to engage the starter motor.
  

These symptoms suggest issues that go beyond just the battery and starter. Let’s dive deeper into potential causes and the steps required for troubleshooting.
Possible Causes of Starting Issues

1. Battery-Related Problems
   Even though the Exide battery is new, there are several factors that could still cause issues:
   • Improper Charging: The battery may not be fully charged, or there could be a problem with the alternator or charging system.
     
   • Loose or Corroded Battery Terminals: If the battery terminals are not securely connected or show signs of corrosion, the machine may not receive enough current to start. Loose connections can create resistance that prevents the proper flow of electricity.
     
   • Faulty Battery: Although rare, new batteries can sometimes be defective. If the battery isn’t holding a charge properly, it can result in starting issues.
     
2. Starter Motor Problems
   • Rebuild Quality: If the starter motor was rebuilt but not correctly assembled or the parts are of poor quality, it might fail to perform as expected.
     
   • Faulty Solenoid: The solenoid, a key component in engaging the starter motor, could be malfunctioning. Even with a new starter, if the solenoid fails to work, the engine won’t start.
     
   • Worn or Sticking Starter Gear: The starter gear may be sticking or worn out, preventing proper engagement with the flywheel.
     
3. Electrical System Issues
   • Wiring Problems: Over time, wiring can degrade, develop shorts, or suffer from loose connections, especially in harsh working conditions. A short in the wiring can cause the engine to not start or result in weak cranking.
     
   • Faulty Ignition Switch: If the ignition switch is malfunctioning, it may not send the proper signals to start the engine, even with the battery and starter in good condition.
     
   • Grounding Issues: The Case 70XT relies on proper grounding for electrical systems to work. If the ground cable is loose or corroded, the entire electrical system may struggle to operate correctly.
     
4. Fuel System Issues
   Though the problem seems electrical, it’s essential not to rule out fuel-related causes:
   • Fuel Pump Problems: If the fuel pump is not functioning correctly, the engine may not receive the necessary fuel to start, even if electrical systems are working fine.
     
   • Fuel Filters Blockage: A clogged fuel filter can prevent fuel from reaching the engine, causing it to crank but not start.
     
5. Starter Relay
   A faulty or defective starter relay can prevent the starter motor from receiving power, leading to starting issues. In some cases, the relay may be stuck in the off position, blocking power from reaching the starter.
   

Steps to Troubleshoot and Fix the Problem
Now that we’ve reviewed the possible causes, here are the steps to troubleshoot and address the starting issue on the Case 70XT.
1. Inspect the Battery and Charging System

• Check Battery Voltage: Use a multimeter to check the voltage of the new Exide battery. A fully charged battery should read around 12.6 to 12.8 volts. If the voltage is low, it could indicate the alternator is not charging the battery properly.
  
• Clean and Tighten Terminals: Ensure that the battery terminals are clean and free from corrosion. Use a wire brush to remove any corrosion, and tighten the terminals securely to ensure a solid connection.
  
• Test the Charging System: Start the machine and check the battery voltage again. It should read between 13.5 and 14.5 volts if the charging system is working correctly. If the voltage is below this, the alternator may be faulty and need replacement.
  

2. Test the Starter Motor and Solenoid

• Inspect the Starter Connections: Ensure that all wires leading to the starter are connected tightly and free of corrosion.
  
• Test the Starter Solenoid: The solenoid should engage the starter motor when the ignition key is turned. Test the solenoid’s functionality by using a jumper wire to engage the solenoid directly. If the starter motor engages, the problem likely lies with the solenoid or starter circuit.
  
• Test the Starter: If the starter was rebuilt, test it by connecting it directly to a battery to see if it spins properly. If it doesn’t, it may need to be rebuilt again or replaced.
  

3. Check the Ignition Switch and Wiring

• Inspect the Ignition Switch: Ensure the ignition switch is functioning correctly. Sometimes, the ignition switch can wear out and fail to send the correct signal to engage the starter.
  
• Check for Shorts or Loose Wires: Inspect the wiring for any visible signs of wear, fraying, or loose connections. Pay particular attention to the wires leading to the starter motor and solenoid. If you find any damaged wiring, replace it immediately.
  

4. Test the Starter Relay

• Jump the Relay: Use a jumper wire to bypass the relay and send power directly to the starter. If the engine starts, then the starter relay is likely faulty and needs to be replaced.
  

5. Inspect the Ground Connection

• Check the Ground Cable: Ensure the ground cable is firmly connected to the engine block and free from corrosion. A weak or broken ground connection can cause the starting system to malfunction.
  

6. Verify Fuel System Operation

• Check Fuel Pressure: Verify that the fuel pump is delivering the proper fuel pressure to the engine. If the fuel pump is weak or clogged, it may need repair or replacement.
  
• Inspect Fuel Filters: Replace any clogged or dirty fuel filters to ensure the engine is receiving clean fuel.
  

Preventative Maintenance Tips
Once the problem is resolved, it’s important to keep the Case 70XT in top working condition. Regular maintenance can help prevent future starting issues and extend the life of the machine.

• Regular Battery Checks: Periodically check the battery voltage and terminals for signs of corrosion.
  
• Lubricate Electrical Connections: Use dielectric grease on electrical connections to prevent corrosion and ensure reliable performance.
  
• Replace Filters and Fluids Regularly: Change the oil, fuel filters, and air filters on a regular basis to maintain engine performance and prevent fuel delivery issues.
  
• Inspect and Clean the Starter System: Periodically inspect the starter motor and solenoid, cleaning them if necessary to ensure proper engagement.
  

Conclusion
Starting problems on the Case 70XT, even with a new Exide battery and rebuilt starter, can stem from a variety of sources, including faulty wiring, a malfunctioning solenoid, or issues with the fuel system. By following the steps outlined above, you can systematically troubleshoot and fix the problem, ensuring your skid steer loader is ready for the job. Regular maintenance and early detection of potential issues will keep the 70XT running smoothly for years to come.