How to Move the Undercarriage of a PC200 Without Hydraulic Lines: A Step-by-Step Guide

[MikePhua]

The undercarriage of an excavator, such as the PC200, plays a critical role in providing stability and mobility to the machine. However, when performing maintenance or repairs, there may be instances where you need to move the undercarriage without the hydraulic lines attached or functioning. Whether it’s due to a hydraulic system failure, an ongoing maintenance task, or other operational reasons, understanding how to manually move the undercarriage without hydraulic assistance can be essential for ensuring that your equipment continues to operate effectively.
This article will explain the methods, tools, and best practices for moving the undercarriage of a PC200 when the hydraulic lines are removed. By following these steps, operators and technicians can safely handle the situation and continue with their repair work.
Understanding the Importance of the Undercarriage
The undercarriage of an excavator serves as its foundation, providing the machine with the necessary mobility to perform tasks on various terrains. It comprises several key components, including:

• Tracks: These provide the traction and support needed for the machine to move on different surfaces.
  
• Track rollers: These help distribute the weight of the machine evenly across the tracks.
  
• Sprockets: These are responsible for driving the tracks forward and backward.
  
• Idler wheels: These support the front end of the track and help maintain tension on the track system.
  

When hydraulic lines are removed, these components must still function to move the machine, but the hydraulic power system that usually controls movement will no longer be available. This can make it challenging, especially in situations where the machine needs to be repositioned for repairs or transport.
Methods for Moving the Undercarriage Without Hydraulic Lines
When hydraulic lines are removed or need to be bypassed, there are several methods to move the undercarriage of a PC200. These methods are based on mechanical or manual options that help reposition the tracks and allow the machine to be moved in the absence of hydraulic assistance.
1. Manual Moving of the Tracks
If the tracks need to be moved short distances, manual movement is often the simplest solution. This can be done by rotating the sprockets and adjusting the tracks using a series of manual tools. Here's how to do it:

• Step 1: Lift the Excavator: Use a crane or lifting equipment to raise the excavator slightly off the ground. Ensure the machine is stable and supported properly.
  
• Step 2: Rotate the Sprocket: Using a large wrench or manual tool, rotate the sprocket on the side of the undercarriage. The sprocket is usually attached to a gear system, and turning it will help move the tracks.
  
• Step 3: Move the Tracks: As you rotate the sprockets, the tracks will move along the undercarriage rollers. With consistent effort, the tracks can be moved forward or backward.
  

This method can be slow but effective when only a small movement of the tracks is required.
2. Using a Hydraulic Jack
While this method still requires some form of mechanical advantage, a hydraulic jack can be used to create the necessary force to move the tracks without relying on the main hydraulic system. Here's a step-by-step guide:

• Step 1: Position the Hydraulic Jack: Place the hydraulic jack under the undercarriage, close to the sprocket or track assembly, where it can support the weight of the tracks.
  
• Step 2: Lift the Tracks: Use the hydraulic jack to lift the undercarriage slightly. This will relieve some of the weight off the tracks, making it easier to rotate them manually.
  
• Step 3: Rotate the Sprockets: With the undercarriage slightly lifted, use a wrench or manual tool to rotate the sprockets and move the tracks forward or backward.
  
• Step 4: Repeat the Process: If the tracks need to be moved a significant distance, repeat the process, lifting and rotating in small increments.
  

3. Using a Winch or Towing System
For larger movements, such as repositioning the excavator across a longer distance, a winch or towing system can be used in conjunction with the undercarriage. This system is useful when the machine is inoperable due to hydraulic line failure but still needs to be relocated.

• Step 1: Set Up the Winch: Position a powerful winch at a secure location, such as a stationary vehicle or a nearby object, ensuring it can handle the load of the excavator.
  
• Step 2: Attach the Winch to the Undercarriage: Attach the winch’s cable to a sturdy point on the undercarriage. This may be a metal frame or the track assembly, depending on the machine.
  
• Step 3: Begin Towing: Slowly operate the winch to pull the excavator across the ground. The force from the winch will help move the tracks, allowing the machine to be repositioned.
  

This method is typically more effective over longer distances, especially when the undercarriage is stuck or needs to be moved across an area without hydraulic power.
Safety Considerations
When attempting to move the undercarriage of a PC200 without hydraulic lines, safety is a top priority. Here are some important considerations to keep in mind:

• Stabilize the Machine: Ensure the machine is properly supported before attempting to lift or move it. Use jack stands, cranes, or other lifting equipment to ensure stability.
  
• Inspect for Blockages: Before attempting to move the tracks, check for any debris or blockages that could obstruct movement. Clear the area around the undercarriage to ensure smooth motion.
  
• Wear Protective Gear: Always wear appropriate personal protective equipment (PPE), including gloves, steel-toed boots, and eye protection, when performing manual labor on heavy equipment.
  
• Avoid Excessive Force: When rotating sprockets or using manual tools, avoid applying excessive force, as this can cause damage to the undercarriage components. Use gradual, steady pressure.
  

Preventing Hydraulic Line Issues in the Future
To avoid issues with hydraulic lines in the future, regular maintenance is key. Here are a few tips to keep your hydraulic system in good working condition:

• Routine Inspections: Inspect hydraulic lines and connections regularly for signs of wear, cracks, or leaks.
  
• Replace Worn Components: If any hydraulic hoses or lines appear worn or damaged, replace them promptly to prevent further issues.
  
• Proper Hydraulic Fluid Maintenance: Ensure that the hydraulic fluid is clean and at the correct levels. Contaminated or low fluid can lead to problems in the system, including the failure of hydraulic lines.
  

Conclusion
Moving the undercarriage of a PC200 excavator without hydraulic assistance may seem challenging, but with the right tools and techniques, it can be done safely and effectively. Whether you're using manual tools, a hydraulic jack, or a winch, understanding the methods available will help you maintain your equipment and continue with necessary repairs. Regular maintenance and careful handling of hydraulic systems will prevent these issues from becoming frequent and ensure that your excavator remains operational in the long term.