CAT 246 and 246B Drive Motor Issues

[MikePhua]

Introduction
The CAT 246 and 246B are popular skid steer loaders used in a variety of construction, landscaping, and agricultural tasks. While these machines are known for their durability, like any piece of equipment, they can experience mechanical issues over time. One of the common problems that operators may encounter is with the drive motor, which can cause performance issues such as reduced power, erratic movements, or a complete loss of drive functionality. This article explores the potential causes of drive motor issues in the CAT 246 and 246B and how to troubleshoot and resolve them.
Symptoms of Drive Motor Problems
When the drive motor is malfunctioning, several symptoms may arise, including:

1. Loss of Power
   The machine may experience reduced power or sluggishness, especially when attempting to move forward or backward. This issue could be more pronounced under load or when the machine is attempting to operate in rough conditions.
   
2. Erratic or Unstable Movements
   If the drive motor is failing, the skid steer may exhibit jerky or inconsistent movement, making it difficult to control the loader’s speed or direction. The movements may not be as smooth as usual.
   
3. No Movement
   In some cases, the drive motor may fail entirely, leading to a complete loss of movement in the skid steer. This could occur suddenly and may prevent the machine from moving at all.
   

Common Causes of Drive Motor Problems
Several factors can contribute to issues with the drive motor in the CAT 246 and 246B skid steer loaders. Some of the most common causes include:

1. Low Hydraulic Fluid or Contaminated Fluid
   The drive motor is powered by the hydraulic system. If the hydraulic fluid is low or contaminated, it can affect the operation of the drive motor. Contaminated fluid can lead to the breakdown of seals and internal components, leading to loss of power or functionality.
   
2. Damaged or Worn Drive Motor Seals
   The seals on the drive motor help prevent fluid leakage. Over time, these seals can wear out, leading to leaks and loss of hydraulic pressure. This can cause reduced performance or failure of the drive motor.
   
3. Faulty Hydraulic Pump
   A malfunctioning hydraulic pump can cause low pressure in the system, which will impact the drive motor’s performance. If the pump is not providing sufficient pressure, the drive motor will not operate as efficiently.
   
4. Clogged or Dirty Hydraulic Filters
   Hydraulic filters that are clogged with debris or dirt can restrict the flow of fluid to the drive motor. This can result in poor performance, overheating, or total failure of the motor.
   
5. Internal Drive Motor Damage
   If the drive motor has suffered internal damage, such as worn or broken components, it may need to be repaired or replaced. Common signs of internal damage include excessive noise, vibrations, or a complete lack of movement.
   

Troubleshooting and Resolving the Issue
If you are experiencing issues with the drive motor on your CAT 246 or 246B, here are the steps you can take to troubleshoot and resolve the problem:

1. Check Hydraulic Fluid Levels and Quality
   Begin by inspecting the hydraulic fluid levels and quality. Ensure that the fluid is at the correct level and is clean. If the fluid appears dirty or contaminated, perform a fluid change and replace the filter. Also, ensure that the fluid is the correct type for your machine.
   
2. Inspect the Drive Motor Seals
   Check the drive motor seals for signs of wear or leakage. If any seals are damaged or leaking, replace them. This is a relatively straightforward repair that can often restore proper motor function.
   
3. Test the Hydraulic Pump Pressure
   If the fluid and seals are in good condition, test the hydraulic pump to ensure it is providing sufficient pressure to the system. If the pump is malfunctioning, it may need to be repaired or replaced.
   
4. Clean or Replace Hydraulic Filters
   Inspect and clean the hydraulic filters to ensure there is no blockage that could be restricting fluid flow to the drive motor. If the filters are dirty or damaged, replace them.
   
5. Inspect the Drive Motor for Internal Damage
   If the above steps do not resolve the issue, it may be necessary to inspect the drive motor itself for internal damage. This may require disassembling the motor to check for worn or broken components. If the motor is severely damaged, it will need to be replaced.
   

Conclusion
The drive motor in the CAT 246 and 246B is a critical component that directly affects the machine's performance. Issues with the drive motor can manifest as loss of power, erratic movements, or complete failure of movement. Regular maintenance, such as checking hydraulic fluid levels, inspecting seals, and cleaning filters, can prevent many common problems. If the issue persists, it may be necessary to inspect the motor for internal damage or consult a professional for repairs. With proper care and timely repairs, your CAT 246 or 246B skid steer will continue to operate efficiently and reliably.