T190 Track Lock Problem and Solutions for Bobcat Skid Steers

[MikePhua]

Bobcat T190 skid steers are well-known for their durability, versatility, and power. They are essential pieces of machinery in various industries, including construction, landscaping, and agriculture. However, like any piece of equipment, they can experience technical issues from time to time. One common problem that owners and operators may face is a track lock issue, which can prevent the machine from moving, even when the engine is running and other systems appear functional.
In this article, we will explore the track lock problem on the Bobcat T190, what causes it, and how it can be resolved to restore full functionality to the machine.
Understanding the Track Lock Mechanism in Bobcat T190
The Bobcat T190 features a track drive system, which uses rubber tracks and hydraulic components to drive the machine. The track lock system is designed to keep the tracks engaged during normal operation but must also be able to disengage to allow the machine to move freely.

1. Track Lock Functionality:
   • The track lock mechanism is typically controlled hydraulically. When engaged, it prevents the tracks from moving, ensuring the machine remains stationary, especially when not in use or during transport.
     
   • This lock system is usually employed when the machine is stationary for long periods to prevent accidental movement or damage.
     
2. When the Problem Occurs:
   • The issue arises when the track lock mechanism fails to disengage. This can prevent the T190 from moving forward or backward, even if the operator is actively engaging the controls. The machine may feel "stuck," and this can lead to frustration and potential downtime if not addressed promptly.
     

Common Causes of the Track Lock Problem
Understanding the root causes of the track lock issue can help in troubleshooting and fixing the problem efficiently. Below are some of the common reasons why the track lock might malfunction on a Bobcat T190:

1. Hydraulic System Failure:
   • The track lock mechanism on the Bobcat T190 is typically powered by the hydraulic system. If there is an issue with the hydraulic pressure or fluid, it may prevent the track lock from disengaging. Common hydraulic problems include low fluid levels, leaks, or faulty hydraulic valves.
     
2. Damaged or Sticking Track Lock Pins:
   • The track lock system involves mechanical components, including locking pins that secure the tracks in place when engaged. Over time, these pins may become damaged, worn, or stuck, causing the lock to remain in place even when it should be disengaged.
     
3. Electrical or Control System Issues:
   • The Bobcat T190’s control system, which manages the hydraulic and mechanical components, may also be at fault. A faulty electrical connection, wiring problem, or malfunctioning solenoid could cause the track lock system to remain engaged or fail to release.
     
4. Faulty Track Lock Solenoid:
   • The track lock solenoid is an important electrical component that controls the hydraulic valve for the track lock. If the solenoid fails or malfunctions, it may fail to send the correct signal to disengage the lock, keeping the tracks immobile.
     
5. Contaminated Hydraulic Fluid:
   • If contaminants like dirt, debris, or moisture enter the hydraulic system, it can lead to sluggish or erratic operation of the track lock mechanism. Contaminated fluid can also cause damage to hydraulic pumps and valves, exacerbating the issue.
     

Diagnosing and Resolving the Track Lock Problem
Now that we understand the potential causes, let's dive into how to diagnose and resolve the track lock issue on the Bobcat T190.

1. Check Hydraulic Fluid Levels:
   • One of the simplest and most common fixes is ensuring that the hydraulic fluid levels are sufficient. Low fluid can reduce the pressure needed to disengage the track lock. Check the fluid reservoir and top it up if necessary. Be sure to use the correct type of hydraulic fluid as specified in the operator’s manual.
     
2. Inspect for Hydraulic Leaks:
   • If low hydraulic fluid is not the issue, you should inspect the system for hydraulic leaks. Look for visible signs of oil leakage around hoses, valves, or fittings. Leaks can lead to insufficient pressure, preventing the track lock from disengaging. Repairing or replacing faulty components may be required.
     
3. Examine the Track Lock Pins:
   • The next step is to check the track lock pins for any signs of damage or wear. These pins can accumulate dirt, rust, or debris, which may cause them to become stuck or fail to disengage. Clean and lubricate the pins, or replace them if they are damaged beyond repair.
     
4. Test the Track Lock Solenoid:
   • If the above steps do not resolve the issue, the next component to check is the track lock solenoid. Using a multimeter, check if the solenoid is receiving the correct voltage. If it’s not functioning properly, it may need to be replaced. Consult the operator's manual for the correct procedure for solenoid replacement.
     
5. Inspect the Control System:
   • If the solenoid is working fine, the issue might lie in the electrical connections or control system. Check for damaged wires, corroded connections, or malfunctioning switches. Faulty control systems can prevent the track lock from disengaging. In this case, you may need to repair or replace the wiring or components involved.
     
6. Replace Contaminated Hydraulic Fluid:
   • If hydraulic fluid contamination is suspected, flush the system and replace the old fluid with fresh, clean hydraulic fluid. Contaminated fluid can clog filters, reduce pump performance, and hinder the track lock system's operation.
     

Preventive Maintenance Tips
To minimize the risk of the track lock problem occurring again, regular maintenance is essential. Here are some preventive maintenance tips:

1. Regularly Check Hydraulic Fluid Levels and Condition:
   • Ensure that hydraulic fluid levels are consistently maintained and that the fluid is clean. Regularly inspect the hydraulic system for leaks and repair any damaged components promptly.
     
2. Lubricate and Inspect the Track Lock System:
   • Perform regular checks of the track lock pins, ensuring they are free from rust and debris. Lubricate the moving parts to ensure smooth operation.
     
3. Check Electrical Connections:
   • Regularly inspect the electrical system for any signs of wear or corrosion. Clean and secure connections as needed to prevent electrical failures.
     
4. Schedule Routine Service Intervals:
   • Follow the manufacturer's recommendations for service intervals, and have the machine professionally inspected on a regular basis to catch any issues early.
     

Conclusion
The track lock issue on the Bobcat T190 can be frustrating, but understanding its causes and how to troubleshoot can help operators quickly diagnose and fix the problem. By checking the hydraulic system, track lock pins, solenoid, and control system, most issues can be resolved with relatively simple steps. Regular maintenance and preventive care are key to avoiding future problems and ensuring that your Bobcat T190 operates efficiently and safely.
Maintaining the integrity of the track drive and hydraulic systems not only helps to avoid downtime but also prolongs the lifespan of the machine, making it an essential part of the T190's operation.