Hydraulic Fluid Filter Change for the CTL70 Compact Track Loader

[MikePhua]

Introduction to the CTL70 Compact Track Loader
The CTL70 Compact Track Loader is part of the Bobcat equipment lineup, a trusted brand in the world of construction, landscaping, and agriculture. The CTL70, with its durable and reliable design, is often used in environments that require high maneuverability, power, and a compact footprint. As with any machine, routine maintenance is key to ensuring that the loader continues to perform at its best over the long term.
One critical aspect of maintaining the CTL70 is the hydraulic system, which powers the loader arms, bucket, and other essential functions. The hydraulic fluid filter plays a crucial role in keeping the system free from contaminants, ensuring that hydraulic components remain in good working condition. Over time, the filter becomes clogged with debris, and a filter change is necessary to keep the hydraulic system operating at optimal efficiency.
In this article, we’ll take a closer look at how to change the hydraulic fluid filter on the CTL70, offering a comprehensive, step-by-step guide that will help ensure you complete the task successfully.
Why Regular Hydraulic Fluid Filter Changes are Important
Hydraulic systems rely on clean, uncontaminated fluid to function efficiently. The hydraulic fluid filter is designed to trap particles such as dirt, metal shavings, and other debris that can damage the hydraulic components if left unchecked. A clogged or dirty filter can reduce the efficiency of the hydraulic system and, in some cases, lead to system failure or even catastrophic damage to key components.
Regularly changing the hydraulic fluid filter is an essential part of maintaining the machine's hydraulic performance. For machines like the CTL70, which are often used in rugged, dusty environments, the filter may need to be changed more frequently than on machines used in cleaner conditions.
Tools and Materials Needed
Before beginning the hydraulic filter change on the CTL70, gather all the necessary tools and materials. Having the right equipment on hand will make the process go much more smoothly. Here’s a list of what you’ll need:

1. New Hydraulic Fluid Filter:
   Ensure that you have the correct replacement filter for your CTL70 model. Bobcat recommends using OEM parts to maintain optimal machine performance.
   
2. Hydraulic Fluid:
   You’ll need enough hydraulic fluid to top up the system after the filter change. Make sure the fluid meets the specifications for the CTL70.
   
3. Wrenches:
   A set of wrenches or socket wrenches will be needed to loosen and remove the filter.
   
4. Oil Drain Pan:
   Since some hydraulic fluid will drain out when the filter is removed, you’ll need an oil drain pan to catch the fluid.
   
5. Rags or Towels:
   Rags will be useful for cleaning up any spills or drips during the process.
   
6. Gloves:
   To protect your hands from the hydraulic fluid and contaminants, wear durable gloves during the procedure.
   

Steps to Change the Hydraulic Fluid Filter on the CTL70
Follow these steps to ensure a successful hydraulic filter change on your CTL70 Compact Track Loader.

1. Prepare the Machine:
   Begin by placing the CTL70 on a level surface and turning off the engine. Ensure the loader is in the “Park” position and that the key is removed. Always prioritize safety by wearing gloves and eye protection during maintenance tasks.
   
2. Locate the Hydraulic Fluid Filter:
   The hydraulic fluid filter is typically located near the hydraulic pump or the hydraulic reservoir. On the CTL70, it can usually be found beneath the loader’s rear access panel. It’s essential to familiarize yourself with the loader’s layout by consulting the operator's manual to pinpoint the exact location of the filter.
   
3. Drain the Hydraulic Fluid:
   Before removing the filter, you’ll need to drain some of the hydraulic fluid from the system. This will help minimize spillage when you remove the filter. Use an oil drain pan to catch any fluid that drains out of the system. Open the drain valve and allow the fluid to flow into the pan.
   
4. Remove the Old Filter:
   Once you’ve drained the system, use your wrenches or a filter removal tool to carefully remove the old hydraulic filter. Be cautious, as the filter may still contain some fluid. Tilt it upright as you remove it to avoid spilling hydraulic fluid.
   
5. Prepare the New Filter:
   Before installing the new filter, lubricate the rubber seal on the top of the filter with a small amount of clean hydraulic fluid. This helps create a proper seal and prevents leaks. It’s also a good idea to check the old filter for any signs of contamination, as this can give you clues about the health of your hydraulic system.
   
6. Install the New Hydraulic Fluid Filter:
   Screw the new filter into place, ensuring that it is tightened properly. Don’t overtighten the filter, as this could damage the seal or make it difficult to remove the filter during future changes. Simply tighten it until it’s snug and secure.
   
7. Refill the Hydraulic Fluid:
   After the new filter is installed, refill the hydraulic system with the recommended type and amount of hydraulic fluid. Refer to the CTL70’s operator manual for the exact specifications. It’s important to use the correct hydraulic fluid to ensure optimal performance and prevent damage to the hydraulic components.
   
8. Check for Leaks:
   Start the CTL70 and operate the loader for a few minutes to circulate the hydraulic fluid through the system. Keep an eye on the area around the new filter and other hydraulic components for any signs of leakage. If you notice any leaks, turn off the machine immediately and tighten the filter or check the seals.
   
9. Dispose of Used Hydraulic Fluid Properly:
   Finally, dispose of the used hydraulic fluid and the old filter according to your local environmental regulations. Hydraulic fluid is a hazardous material, so make sure it is disposed of responsibly.
   

Troubleshooting Common Issues
While changing the hydraulic filter on your CTL70 is a relatively straightforward task, there are a few issues you may encounter:

1. Leaks After Filter Installation:
   If you notice leaks around the new filter after installation, it may be due to an improperly tightened filter or a damaged seal. Ensure that the filter is properly aligned and tightened to prevent leaks.
   
2. Low Hydraulic Fluid Level:
   After changing the filter, check the hydraulic fluid level carefully. If the system is low, add more fluid until it reaches the correct level. Operating the loader with insufficient fluid can damage the hydraulic components.
   
3. Poor Hydraulic Performance:
   If you notice a decline in hydraulic performance after the filter change, the issue may not be the filter but rather a more serious problem with the hydraulic pump or other components. In this case, it’s important to consult a qualified technician to diagnose the issue.
   

Conclusion
Changing the hydraulic fluid filter on the Bobcat CTL70 Compact Track Loader is an essential maintenance task that helps keep the hydraulic system functioning at peak efficiency. By following the outlined steps, you can ensure that your machine continues to perform reliably and without unnecessary downtime.
Routine maintenance, including fluid and filter changes, is crucial to the longevity of the machine. A well-maintained CTL70 will provide years of reliable service, whether you’re using it for construction, landscaping, or any other demanding application.
Always refer to the manufacturer’s manual for specific instructions, as models may have slight variations. By staying on top of regular maintenance, you can avoid costly repairs and ensure the continued performance of your equipment.