Doosan DX55 Tracking Issues and Solutions

[MikePhua]

The Doosan DX55 is a compact and efficient excavator used in a variety of construction and excavation tasks. However, some users have reported issues with the machine not tracking straight, which can affect both productivity and the longevity of the equipment. This article aims to summarize potential causes for the tracking issue and provide solutions for correcting the problem, helping operators and technicians quickly address and resolve these concerns.
Common Causes and Solutions

1. Uneven Track Tension
   Track tension is a critical factor that directly affects the machine’s ability to travel straight. If the track tension is uneven, the excavator may not track properly, causing it to veer to one side. To resolve this, check and adjust the track tension on both sides of the machine to ensure they are balanced. Operators should regularly inspect track tension, especially after extended use, to prevent this issue.
   
2. Worn Drive and Idler Wheels
   Worn drive and idler wheels can cause the tracks to lose balance, which in turn leads to uneven tracking. Inspect these components for signs of wear. If significant wear is detected, replace the affected parts to restore the tracking performance of the machine. Regularly replacing worn drive and idler wheels can help avoid tracking issues in the future.
   
3. Hydraulic System Malfunction
   The hydraulic system plays a crucial role in the operation of the machine’s tracks. Low hydraulic fluid levels, a faulty hydraulic pump, or leaks in the hydraulic lines can all cause tracking instability. It is essential to perform regular hydraulic system checks, ensuring the oil levels are sufficient and there are no leaks. If the fluid is degraded or contaminated, it should be replaced to maintain system efficiency.
   
4. Problems with the Control System
   If the control system, including the direction control valve, joystick, or associated sensors, is malfunctioning, it may lead to erratic or uneven tracking. Check for any issues with these components and recalibrate or replace any faulty parts as needed. Recalibrating or fixing these systems can restore the machine’s proper tracking abilities.
   
5. Operator Error
   Sometimes, improper operation can cause the machine to veer off course. For instance, aggressive acceleration, braking, or constant steering adjustments can all lead to the excavator not tracking straight. Ensuring operators are trained to use the machine properly is key to avoiding this issue. Encourage smooth and steady driving practices to maintain control and prevent erratic movements.
   

How to Diagnose and Repair

1. Check and Adjust Track Tension
   First, verify that the track tension is balanced on both sides. If there is a discrepancy, adjust the track tension according to the manufacturer’s guidelines. Maintaining proper track tension ensures better stability and tracking performance.
   
2. Replace Worn Components
   Inspect drive wheels, idler wheels, and other critical components for excessive wear. If these parts are found to be worn out, replace them promptly to restore proper function. Regular maintenance and timely part replacement are essential for maintaining the machine’s tracking capability.
   
3. Inspect the Hydraulic System
   Check the hydraulic fluid level and quality. If the oil is dirty or low, replace it with the correct hydraulic fluid as specified in the user manual. Inspect the hydraulic lines for leaks and repair any issues found to ensure the system works efficiently. Regular hydraulic checks are vital to prevent tracking issues caused by fluid or system malfunctions.
   
4. Recalibrate the Control System
   If the control system is suspected of causing tracking issues, inspect the direction control valve, joystick, and sensors for any faults. Recalibrate the system, replace faulty parts, or reset the machine’s settings as necessary. Ensuring that the control system is working properly can eliminate erratic tracking behavior.
   
5. Improve Operator Techniques
   Operators should be reminded to avoid rapid acceleration, harsh braking, and frequent steering adjustments. Smooth and controlled operation is essential for keeping the excavator on track. Proper operator training and awareness can help reduce tracking problems caused by user error.
   

Conclusion
Tracking issues with the Doosan DX55 are often caused by uneven track tension, worn components, hydraulic system malfunctions, control system failures, or operator error. By performing routine inspections and addressing potential issues early, operators can prevent tracking problems from arising. Ensuring proper track tension, replacing worn parts, maintaining the hydraulic system, and calibrating the control system will help the machine track straight and function efficiently. Additionally, promoting proper operating habits will improve the overall performance and lifespan of the equipment.