Troubleshooting a Case 850C Dozer That Stops Pushing

[MikePhua]

The Case 850C is a reliable dozer used in a variety of heavy-duty construction and landscaping tasks. However, like all machinery, it can experience issues that affect performance. One common problem reported by users is the dozer suddenly stopping its pushing ability. This article explores potential causes for this issue and provides guidance on troubleshooting and resolving it.
Common Causes of the Dozer Stopping Pushing

1. Hydraulic System Failures
   

The hydraulic system is responsible for driving the dozer's tracks and blade. If there is a failure in the hydraulic system, it can cause the machine to stop pushing or lose power. Common issues within the hydraulic system that could lead to loss of pushing power include:

• Low Hydraulic Fluid: Insufficient fluid can lead to a loss of pressure, causing the hydraulics to fail. Regularly checking and maintaining the correct fluid level is crucial to prevent this issue.
  
• Hydraulic Pump Failure: A malfunctioning pump may not generate enough pressure to move the blade or drive the tracks effectively. If the pump is damaged, it may need to be replaced.
  
• Clogged Hydraulic Filter: A clogged or dirty hydraulic filter can restrict fluid flow, reducing the efficiency of the hydraulic system and preventing the dozer from pushing properly.
  
• Damaged Hydraulic Lines or Hoses: Any leaks or damage to the hydraulic lines or hoses can cause a drop in hydraulic pressure, affecting the dozer’s pushing ability. Inspecting the lines for wear or leaks is necessary to identify this problem.
  

1. Transmission Issues
   

The transmission is responsible for controlling the power flow to the tracks, and any issues with the transmission can result in the dozer losing pushing power. Possible transmission-related problems include:

• Low Transmission Fluid: Just like hydraulic fluid, transmission fluid must be at the correct level for the system to function correctly. Low fluid levels can lead to poor performance or complete transmission failure.
  
• Transmission Clutch Problems: If the transmission clutch is worn or malfunctioning, it may not engage properly, preventing the dozer from moving forward or pushing. This can be a result of long-term use or improper maintenance.
  
• Worn Gears or Components: Over time, the gears and other components in the transmission system can wear out, leading to issues with power transfer to the tracks. Regular inspection of the transmission system is key to preventing this issue.
  

1. Engine Performance Issues
   

The engine provides the power necessary to drive the hydraulic and transmission systems, so any performance issues with the engine can affect the dozer’s ability to push. Common engine-related problems include:

• Low Power Output: If the engine is not producing enough power, it may not be able to supply the hydraulic and transmission systems with the necessary energy to function properly. Low power could be caused by fuel delivery issues, clogged air filters, or engine wear.
  
• Fuel System Problems: Issues with the fuel injectors, fuel filters, or fuel pump can result in inadequate fuel supply to the engine, causing it to run inefficiently and lose power. This can directly impact the dozer’s ability to push.
  
• Exhaust Blockages: Blockages in the exhaust system, such as a clogged muffler or exhaust filter, can cause the engine to overheat and reduce power output. Ensuring the exhaust system is clear is important for optimal engine performance.
  

1. Track and Drive Train Issues
   

The dozer's tracks are responsible for providing the necessary traction to push materials. If the tracks or drivetrain components are malfunctioning, the dozer may stop pushing effectively. Possible track-related problems include:

• Worn or Damaged Tracks: If the tracks are excessively worn or damaged, they may not provide the necessary grip to move the dozer forward. Inspecting the tracks for wear and replacing them when necessary can resolve this issue.
  
• Track Tension Problems: Incorrect track tension can cause the tracks to slip or reduce the efficiency of the drive system. Ensuring proper tension is important to maintain traction and pushing power.
  
• Drive Sprocket Issues: The drive sprockets are responsible for engaging the tracks and transferring power. If the sprockets are worn or damaged, the tracks may not move properly, preventing the dozer from pushing.
  

Steps to Troubleshoot the Case 850C Stopping Pushing

1. Check Hydraulic Fluid Levels
   

Begin by inspecting the hydraulic fluid levels. Low fluid can be a quick and easy fix. If the fluid is low, refill it to the proper level and monitor the dozer’s performance. If the fluid level is fine, check for leaks in the hydraulic system.

1. Inspect the Hydraulic System for Leaks
   

Look for any signs of leaking hydraulic fluid around hoses, seals, and fittings. If any leaks are found, repair or replace the damaged components to restore hydraulic pressure. Also, check the hydraulic filter and clean or replace it if it appears clogged.

1. Examine the Transmission Fluid
   

Check the transmission fluid level and quality. Low or dirty fluid can affect the transmission’s performance. Refill or replace the fluid as necessary, and inspect the transmission for any signs of damage or wear.

1. Test the Engine
   

If hydraulic and transmission fluids are not the issue, inspect the engine’s power output. Ensure that it is running at full capacity and not showing signs of poor fuel delivery, clogged air filters, or exhaust blockages. A quick diagnostic scan can help identify any engine-related issues.

1. Inspect Tracks and Drive Train
   

Inspect the tracks for wear and ensure they are properly tensioned. If the tracks are damaged, replace them. Additionally, check the drive sprockets and other drivetrain components for wear or damage.
Conclusion
When a Case 850C dozer stops pushing, it can be caused by a variety of factors, including hydraulic issues, transmission problems, engine performance issues, or track and drivetrain malfunctions. By systematically inspecting the hydraulic system, transmission, engine, and tracks, you can identify and resolve the underlying cause. Regular maintenance and timely repairs will help keep your Case 850C running smoothly, ensuring it can continue to perform its heavy-duty tasks without interruption.