Case 850 Loader Steering Issues and Solutions

[MikePhua]

The Case 850 loader is a robust piece of machinery, renowned for its power and reliability in various construction and material handling tasks. However, like all heavy equipment, it can encounter operational issues. One of the most common problems faced by operators is steering malfunctions, which can significantly impact maneuverability and overall efficiency. In this article, we will explore the potential causes of steering issues in the Case 850 loader and provide practical solutions to address them.
Overview of the Case 850 Loader
The Case 850 is a powerful track loader designed to handle heavy-duty tasks such as grading, material handling, and earthmoving. Known for its superior lifting capacity, durability, and versatility, the 850 loader is widely used in construction, mining, and agricultural applications. It features a hydrostatic drive system, making it ideal for smooth operations and precise control. The loader is equipped with a highly responsive hydraulic system that powers the steering mechanism, allowing operators to perform tasks with ease.
Common Steering Issues in the Case 850 Loader
While the Case 850 is a durable machine, certain steering issues can arise over time, affecting its performance. These problems can range from minor steering delays to complete failure of the steering system. Below, we discuss the most common causes of steering issues in the Case 850 loader.
1. Low Hydraulic Fluid Levels
The Case 850 loader’s steering system relies heavily on hydraulic pressure. If the hydraulic fluid levels are too low, it can cause sluggish or unresponsive steering. Hydraulic fluid is essential for generating the pressure required to move the loader’s steering mechanism.

• Solution: Regularly check and top up the hydraulic fluid to the correct level. Ensure that the hydraulic fluid is clean and free from contaminants, as dirty fluid can lead to performance issues. If the fluid level is consistently low, inspect the hydraulic system for leaks.
  

2. Air in the Hydraulic System
Air trapped in the hydraulic lines can lead to erratic steering behavior. When air enters the system, it disrupts the smooth flow of hydraulic fluid, causing inconsistent pressure and response. This can result in the loader being hard to steer or responding slowly.

• Solution: Bleed the hydraulic system to remove any air pockets. This can be done by following the manufacturer’s guidelines for purging air from the hydraulic lines. Ensure that all connections are properly sealed to prevent air from entering the system in the future.
  

3. Worn or Damaged Steering Components
Over time, the components of the steering system, such as the steering pump, cylinders, and control valves, can wear out or become damaged. This wear and tear can cause the loader to lose steering efficiency, leading to slow or inconsistent steering.

• Solution: Inspect the steering components regularly for signs of wear. Replace any damaged or worn parts, such as seals, hoses, or cylinders. Make sure that the steering pump is functioning correctly and providing adequate pressure to the system.
  

4. Faulty Steering Pump
The steering pump is responsible for generating the hydraulic pressure needed for steering. If the pump is failing or operating inefficiently, it can result in weak or unresponsive steering. The pump may wear out over time due to prolonged use or lack of proper maintenance.

• Solution: Check the steering pump for proper operation. Look for any signs of leakage, unusual noise, or low pressure. If the pump is found to be faulty, replace it with a new one. Ensure that the replacement pump matches the specifications of the loader.
  

5. Blocked or Clogged Hydraulic Filters
The hydraulic system relies on filters to keep the fluid clean and free of debris. Over time, these filters can become clogged, restricting the flow of fluid and causing a drop in hydraulic pressure. This can lead to poor steering performance and overall hydraulic system inefficiency.

• Solution: Regularly inspect and replace the hydraulic filters. Clean the filter housing and check for any debris or contaminants that may have built up. Use high-quality filters that are designed to meet the specifications of the Case 850 loader.
  

6. Steering Control Valve Problems
The steering control valve regulates the flow of hydraulic fluid to the steering cylinders. If the valve becomes damaged or misaligned, it can result in poor steering control and delayed response times.

• Solution: Inspect the steering control valve for any signs of wear or malfunction. If the valve is not functioning properly, it may need to be repaired or replaced. Ensure that the valve is calibrated correctly to maintain smooth steering control.
  

Troubleshooting and Diagnostic Tips for Steering Issues
When facing steering issues in the Case 850 loader, it’s essential to troubleshoot systematically to identify the root cause. Here are some diagnostic steps to help pinpoint the problem:

1. Check Hydraulic Fluid Levels and Quality: Start by checking the hydraulic fluid levels. If the fluid is low, top it up with the correct type of hydraulic fluid. If the fluid appears dirty or contaminated, perform a fluid change.
   
2. Inspect the Hydraulic System for Leaks: Check all hydraulic hoses, cylinders, and connections for leaks. A leak can cause a drop in pressure, leading to steering issues. Tighten any loose connections and replace damaged hoses or seals.
   
3. Bleed the Hydraulic System: If you suspect air in the system, bleed the hydraulic lines according to the manufacturer’s instructions. This will ensure that the system is free of air pockets and operating efficiently.
   
4. Examine the Steering Pump: Test the steering pump for proper operation. Check for signs of wear or damage, and replace the pump if necessary. Ensure that the pump is delivering adequate pressure to the system.
   
5. Check Steering Components for Wear: Inspect the steering cylinders, control valves, and other components for signs of wear. Replace any parts that are damaged or no longer functioning properly.
   
6. Perform a Steering Alignment Check: If the steering system is still unresponsive after addressing hydraulic and mechanical issues, check the alignment of the steering components. Misalignment can cause uneven steering and poor performance.
   

Preventive Maintenance for the Case 850 Loader
To minimize the risk of steering issues and ensure the long-term reliability of your Case 850 loader, regular preventive maintenance is essential. Here are some maintenance tips to keep your loader operating smoothly:

• Change Hydraulic Fluid and Filters Regularly: Follow the maintenance schedule outlined in the operator’s manual for changing the hydraulic fluid and filters. Clean fluid is essential for maintaining optimal steering performance.
  
• Inspect Steering Components Frequently: Regularly check the steering pump, valves, cylinders, and hoses for wear and damage. Replace any worn components promptly to prevent further damage to the system.
  
• Monitor Fluid Levels and Condition: Keep an eye on the hydraulic fluid levels and condition. Low fluid or contaminated fluid can lead to performance issues. Always use high-quality fluid that meets the manufacturer’s specifications.
  
• Lubricate Moving Parts: Ensure that all moving parts of the steering system are properly lubricated. This helps reduce friction and wear, extending the lifespan of the components.
  
• Perform Periodic System Checks: Conduct regular diagnostic checks to identify any potential issues before they become major problems. This can include testing the steering pump, checking for leaks, and inspecting the hydraulic system.
  

Conclusion
Steering issues in the Case 850 loader can significantly hinder productivity and safety on the job site. However, with regular maintenance and prompt troubleshooting, most steering problems can be identified and resolved quickly. By maintaining the hydraulic system, checking fluid levels, and inspecting steering components, operators can keep their loader in top working condition, ensuring smooth and efficient performance for years to come.