Case 1835B Skid Steer: No Drive to Left Side – Troubleshooting and Solutions

[MikePhua]

The Case 1835B skid steer is a powerful and reliable machine used for various construction and landscaping tasks. However, as with any heavy equipment, issues can arise from time to time. One common problem faced by owners of the Case 1835B is the loss of drive to one side, particularly the left side. This issue can disrupt the machine's performance and make it difficult to operate efficiently. This article outlines the possible causes of no drive to the left side and provides solutions to address the problem.
Symptoms of the Problem
The primary symptom of this issue is the loss of drive to the left side of the skid steer. When operating the machine, you may notice that the left side does not respond to the controls, while the right side functions normally. This can cause the machine to be unbalanced, making it difficult to steer or perform certain tasks. If the issue is not addressed promptly, it can lead to further mechanical failures and operational inefficiencies.
Possible Causes of No Drive to the Left Side

1. Hydraulic Problems
   The most common cause of the no-drive issue is a hydraulic problem. The Case 1835B uses hydraulic motors to drive the wheels on each side of the skid steer. If there is a problem with the hydraulic system, such as a blockage, low fluid levels, or a faulty hydraulic motor, it can prevent the left side from functioning properly.
   • Low Hydraulic Fluid: Insufficient hydraulic fluid can reduce the pressure needed to operate the hydraulic motors, leading to the loss of drive to one side.
     
   • Clogged Hydraulic Lines: Dirt or debris in the hydraulic lines can cause blockages, preventing the flow of hydraulic fluid to the left side motor.
     
   • Faulty Hydraulic Motor: If the hydraulic motor on the left side is damaged or malfunctioning, it may not provide enough power to drive the wheel.
     
2. Drive Chain or Gearbox Issues
   The Case 1835B skid steer uses a drive chain and gearbox system to transfer power from the hydraulic motors to the wheels. If there is a problem with the drive chain or the gearbox, it can prevent the left wheel from receiving power.
   • Broken or Loose Drive Chain: A broken or loose drive chain can interrupt the connection between the hydraulic motor and the wheel, resulting in no drive to the left side.
     
   • Worn or Damaged Gearbox: If the gearbox on the left side is worn or damaged, it may fail to transfer power from the motor to the wheel, leading to the loss of drive.
     
3. Electrical Issues
   Electrical issues can also contribute to the no-drive problem. If there is a fault in the electrical system that controls the hydraulic motors or the drive system, it can prevent the left side from functioning properly.
   • Faulty Wiring or Connections: Damaged or loose electrical connections can cause a loss of power to the left side hydraulic motor.
     
   • Faulty Solenoid or Valve: The solenoids and valves control the flow of hydraulic fluid to the motors. If one of these components fails, it can cause the left side motor to stop receiving fluid, resulting in no drive.
     
4. Drive Motor Lockup
   In some cases, the left side drive motor may become locked or frozen. This can occur due to internal wear, debris buildup, or a failure in the motor’s components. A locked drive motor will prevent the left side wheel from turning, even if the hydraulic fluid is flowing properly.
   

Troubleshooting the No-Drive Issue

1. Check Hydraulic Fluid Levels
   The first step in troubleshooting the issue is to check the hydraulic fluid levels. If the fluid is low, top it up with the appropriate type of hydraulic oil. It is also important to check for any signs of leaks in the hydraulic system, as leaks can cause a loss of pressure and reduce the efficiency of the hydraulic motors.
   
2. Inspect Hydraulic Lines and Filters
   Next, inspect the hydraulic lines for any blockages or damage. If you notice any clogs, clean the lines thoroughly. Also, check the hydraulic filters for debris buildup and replace them if necessary. Ensuring that the hydraulic system is free of blockages and contaminants is essential for proper operation.
   
3. Test the Hydraulic Motor
   If the hydraulic fluid and lines appear to be in good condition, the next step is to test the hydraulic motor on the left side. You can do this by disconnecting the motor and testing it separately. If the motor does not operate as expected, it may need to be repaired or replaced.
   
4. Check the Drive Chain and Gearbox
   Inspect the drive chain and gearbox for any signs of damage or wear. A broken or loose drive chain should be replaced or tightened. If the gearbox is damaged, it may need to be repaired or replaced to restore drive to the left side.
   
5. Inspect Electrical Components
   Check the electrical wiring and connections that control the hydraulic motors and drive system. Look for any loose or damaged wires, and repair or replace them as necessary. Test the solenoids and valves to ensure they are functioning properly and providing the correct flow of hydraulic fluid to the left side motor.
   
6. Examine the Drive Motor
   If all other components are functioning properly, the drive motor may be locked or frozen. Remove the motor and inspect its internal components for wear or damage. If the motor is locked, it may need to be rebuilt or replaced.
   

Conclusion
The loss of drive to the left side of a Case 1835B skid steer can be caused by a variety of issues, including hydraulic problems, drive chain or gearbox failure, electrical issues, or a locked drive motor. By carefully troubleshooting each of these potential causes, you can identify the root of the problem and take the necessary steps to restore proper function to the machine. Regular maintenance, including checking fluid levels, inspecting hydraulic lines, and testing key components, can help prevent this issue from occurring in the future and ensure that your skid steer continues to operate smoothly.