PC150-3 Track Tension: Understanding the Proper Adjustment Process

[MikePhua]

Maintaining the correct track tension on the Komatsu PC150-3 excavator is crucial for optimizing performance, preventing track wear, and ensuring the longevity of your machine. Proper track tension reduces excessive wear on components like the track rollers, sprockets, and the track itself. In this article, we will explore the importance of track tension, the signs of incorrect tension, and the steps for adjusting the track tension on the Komatsu PC150-3.
Why Track Tension Matters
Track tension plays a critical role in how the excavator performs. When the tension is set correctly, it ensures that the track remains engaged with the sprockets and that the rollers do not wear prematurely. Proper tension also reduces the risk of track derailment and prevents unnecessary stress on the undercarriage components.
If the track is too tight, it can cause excessive wear on the rollers, sprockets, and even increase fuel consumption. If the track is too loose, it can lead to track slippage, increased wear, and potential track derailment. Finding the right balance is key to maintaining optimal machine performance.
Signs of Incorrect Track Tension
The following symptoms can indicate that the track tension on your PC150-3 may need adjustment:

1. Excessive Track Slack: If the track is too loose, it may visibly sag or slide along the rollers.
   
2. Track Slippage: The track may slip when the excavator is under load or during aggressive operation.
   
3. Increased Wear on Track Components: If you notice uneven wear or damage to the rollers, sprockets, or track links, it could be a sign of incorrect track tension.
   
4. Noisy Operation: If there is an unusual noise coming from the undercarriage, it could be due to the track being too tight or too loose.
   

Steps for Adjusting Track Tension
Properly adjusting the track tension on the Komatsu PC150-3 is relatively simple, but it requires the right tools and a bit of patience. Here are the steps involved:
1. Lift the Excavator
Before you begin adjusting the track, it’s essential to safely lift the excavator. This allows you to remove any pressure on the track and provides better access for making adjustments.

• Use a jack or a hydraulic lift to raise the undercarriage of the machine.
  
• Ensure the machine is secure and stable before proceeding.
  

2. Locate the Tension Adjusting Bolt
The tensioning mechanism on the Komatsu PC150-3 involves an adjusting bolt and a grease-filled tensioning cylinder. This bolt is typically located near the rear of the track assembly.

• Refer to your machine’s service manual to locate the exact position of the tension adjusting bolt.
  

3. Check the Current Track Tension
To check the current tension, measure the amount of deflection in the track. Typically, a deflection of about 1.5 to 2 inches is ideal for the PC150-3. You can do this by pressing down on the track midway between the front and rear rollers.

• If the deflection exceeds the recommended range, the track may be too loose or too tight.
  
• If necessary, use a track gauge to ensure proper measurement.
  

4. Adjust the Track Tension
To adjust the tension, you’ll need to rotate the tensioning bolt. If the track is too loose, turn the bolt to add grease to the cylinder, tightening the track. If the track is too tight, release grease to loosen it.

• Tightening the track: Use a wrench or suitable tool to rotate the tensioning bolt in a clockwise direction.
  
• Loosening the track: Turn the bolt counterclockwise to release some of the grease from the cylinder.
  

Make small adjustments and recheck the deflection until you reach the proper track tension.
5. Check and Re-check Tension
After making the initial adjustments, it's important to check the track tension again. Over-tightening or under-tightening can cause long-term damage, so it's essential to test the tension several times before confirming that it's set correctly.

• Keep a close eye on the deflection after adjustments and ensure that it falls within the recommended range.
  

6. Lower the Excavator
Once the track tension is correctly adjusted, carefully lower the excavator back to the ground. Test the machine to ensure that the track operates smoothly and without issues.
Conclusion
Proper track tension is an essential aspect of maintaining the Komatsu PC150-3 excavator. By regularly checking and adjusting the track tension, you ensure better performance, reduce wear on key components, and extend the lifespan of the machine. Following the steps outlined above will help you adjust the track tension with ease and keep your machine operating at peak efficiency. Regular maintenance of the undercarriage, including proper track tension, is one of the most effective ways to avoid costly repairs and downtime.