T190 Rear Track Idler Issues and Solutions

[MikePhua]

The Bobcat T190 is a compact track loader known for its versatility and reliability in a variety of construction and agricultural tasks. Its impressive maneuverability, combined with robust lifting power, makes it a popular choice among operators. However, as with any piece of heavy machinery, wear and tear can lead to performance issues over time. One common problem faced by owners of the T190 is with the rear track idler. This article explores the functions of the rear track idler, the common issues that arise, and how to address them effectively.
1. Understanding the T190 Rear Track Idler
The track idler on any tracked machine, including the Bobcat T190, plays an essential role in the undercarriage system. It is the part located at the rear of the tracks and serves to guide and support the track as it moves over the terrain. The idler helps maintain proper tension on the tracks, ensuring they stay tight and operate smoothly, reducing the risk of track slippage or misalignment.
The rear idler also functions as a structural component that absorbs some of the stress and impact from the tracks as the loader moves, making it crucial for overall machine performance. When the idler begins to show signs of damage or wear, the functionality of the tracks and undercarriage system can be compromised.
2. Common Issues with the T190 Rear Track Idler
Several problems can arise with the rear track idler on the T190. Recognizing these issues early can help avoid costly repairs and downtime. Here are the most common problems:
Track Misalignment and Slippage
One of the most common signs of a failing rear idler is track misalignment or slippage. If the track is not staying in the correct position or is slipping off the idler, it is often a sign that the idler has become worn or damaged. Over time, the idler wheel can become worn out, leading to improper tracking and excessive wear on the track.
Excessive Wear or Damage to the Idler Wheel
The idler wheel itself is subject to significant stress, and constant movement can cause wear, cracks, or damage. When the idler wheel becomes too worn, it will not provide the necessary support and tension for the tracks, leading to further issues with track alignment and machine performance.
Seized or Stiff Idler
The idler wheel is typically mounted on a shaft and operates with bearings or bushings. If these components become worn out, the idler may seize or become stiff, which can cause difficulty in tracking and poor machine operation. This problem is especially common in older machines or in those that have been used heavily without proper maintenance.
Hydraulic Tensioning System Failures
Some versions of the T190 come equipped with a hydraulic tensioning system for the tracks. If the hydraulic system fails, it can affect the proper tension of the tracks, and consequently, the performance of the rear idler. Hydraulic leaks or failures in the cylinder can lead to the loss of tension, causing the tracks to become too loose or too tight.
3. Diagnosing the Problem with the Rear Track Idler
To diagnose issues with the rear track idler, operators should start by visually inspecting the track system. Look for the following signs:

• Track alignment issues: If the tracks are visibly out of alignment or showing signs of wear on one side, the rear idler could be misaligned or damaged.
  
• Uneven track wear: Worn-out idlers can cause uneven wear patterns on the tracks, which will often be visible in the form of uneven tread wear.
  
• Excessive noise: A loud, grinding noise coming from the idler area can indicate worn bearings or other internal issues.
  
• Visible damage to the idler: Cracks, chips, or general wear on the rear idler wheel are clear signs that it needs attention.
  

If you notice any of these symptoms, it’s important to perform a more detailed inspection, possibly removing the tracks to assess the idler and its associated components more closely.
4. Replacing or Repairing the T190 Rear Track Idler
If you have identified a problem with the rear track idler on your Bobcat T190, you have several options for repair or replacement. Here’s a breakdown of the process:
Replacement of the Idler Wheel
If the idler wheel is visibly damaged or severely worn, replacing it is often the best option. It’s important to use the correct replacement part to ensure the proper fit and function. Bobcat offers replacement idlers designed specifically for the T190, or you can opt for high-quality aftermarket idlers that meet or exceed OEM standards.
Hydraulic Tensioner Repair
If the issue lies with the hydraulic tensioning system, repairing or replacing the hydraulic cylinder or seals is necessary. Hydraulic issues can be tricky, as they often require specialized tools and knowledge to fix. If you're not familiar with hydraulic systems, it may be best to consult a professional mechanic.
Bearing and Bushing Replacement
For stiff or seized idlers, replacing the bearings or bushings is a common solution. These parts can wear down over time, causing the idler to become stiff or seize completely. Replacing the bearings or bushings will restore proper movement to the idler and prevent further damage to the track system.
Track Adjustment and Maintenance
In some cases, adjusting the track tension or lubricating the track system can alleviate the symptoms of a worn idler. Regular maintenance of the track system, including proper tension and lubrication, can help extend the lifespan of the rear idler and prevent premature wear.
5. Preventative Maintenance for the Rear Track Idler
Preventing damage to the T190 rear track idler is largely a matter of regular maintenance and monitoring. Here are some tips to ensure the longevity of the idler:

• Regular inspection: Check the idler and track system frequently for signs of wear or damage. Catching small issues early can prevent costly repairs down the road.
  
• Track tension maintenance: Always ensure the track is properly tensioned. Over-tightening or under-tightening the tracks can place unnecessary stress on the idler and other components of the track system.
  
• Keep the system lubricated: Proper lubrication of the track system, including the idler, reduces friction and wear. Regularly check for and replace any worn or damaged seals and bearings.
  
• Address hydraulic issues promptly: If the hydraulic tensioning system begins to show signs of failure, address the issue quickly to avoid further damage.
  

6. Real-World Example: Bobcat T190 in the Field
A construction company using Bobcat T190 compact track loaders for landscaping and excavation noticed that their machines were beginning to experience track misalignment and unusual wear patterns. After performing a thorough inspection, the team found that the rear track idler on multiple machines had suffered significant wear, which was causing the tracks to slip off-track.
The company took the machines offline and replaced the rear track idlers with new OEM parts. They also serviced the hydraulic tensioning system and adjusted the track tension. Following these repairs, the T190s returned to operation, showing smoother performance and reducing downtime.
Conclusion
The Bobcat T190 is a reliable and powerful machine, but like all heavy equipment, it requires proper maintenance to avoid common issues like rear track idler wear. Regular inspection, prompt repair of damaged components, and preventative maintenance can keep your machine operating smoothly for years to come. Whether it’s replacing a worn idler, fixing a hydraulic tensioner, or simply adjusting track tension, staying on top of maintenance ensures optimal performance and prevents costly downtime.