JD 35ZTS Compact Excavator Overview and Troubleshooting

[MikePhua]

The John Deere 35ZTS is a popular compact excavator known for its reliability and versatility in tight spaces. Used primarily in construction, landscaping, and utility projects, it’s a machine built to handle a wide range of tasks. However, like all heavy equipment, the JD 35ZTS may encounter issues over time that can affect its performance. Understanding the machine’s key features and common problems, along with how to troubleshoot them, is crucial for keeping this workhorse in optimal condition.
A Glimpse into the JD 35ZTS Excavator
The John Deere 35ZTS is a mini or compact excavator with a zero tail swing (ZTS) design, making it ideal for working in confined spaces. This feature means the machine’s rear does not extend past its undercarriage, allowing it to pivot in tight spots without the risk of hitting obstacles behind it. It is powered by a 24.8 horsepower engine and has a maximum digging depth of around 10 feet, with an operating weight of approximately 8,000 pounds. Its compact size, combined with strong lifting and digging capabilities, makes the 35ZTS an attractive option for contractors working in urban environments or on smaller projects.
John Deere has a long history in the agricultural and construction machinery sectors. Founded in 1837, the company is recognized for its innovative machinery and is a trusted brand among professionals. With the launch of the 35ZTS, John Deere aimed to provide a more nimble and efficient machine for smaller-scale operations while maintaining the high durability and performance standards the brand is known for.
Key Features of the JD 35ZTS

1. Zero Tail Swing Design: This allows operators to work in confined areas without risking damage to the machine or surrounding structures.
   
2. Hydraulic System: A powerful hydraulic system ensures smooth operation of the boom, bucket, and arm, improving overall performance.
   
3. Cab Comfort: The cabin is designed for operator comfort with adjustable seating and easy access to controls, allowing for long hours of operation without fatigue.
   
4. Efficient Fuel Usage: The 35ZTS is known for its fuel efficiency, an important factor for operators who need to keep operational costs down.
   

Common Issues with the JD 35ZTS
Despite its many advantages, the JD 35ZTS is not without its share of challenges. Operators may encounter several issues, some of which may affect its starting, hydraulic system, or overall performance. Below are some of the most common problems associated with this machine and how to troubleshoot them.
1. Starting Issues
A common problem with the JD 35ZTS is difficulty starting the engine. This can be caused by several factors, such as battery failure, fuel system issues, or electrical malfunctions.
Diagnosis and Solutions:

• Battery Issues: Ensure the battery is fully charged and the terminals are clean and tightly connected. If the battery is more than three years old, it may need to be replaced.
  
• Fuel System Blockages: Clogged fuel filters or air in the fuel lines can prevent the engine from starting. Replacing the fuel filter and bleeding the fuel lines should resolve the issue.
  
• Ignition System: Check the ignition switch and the starter motor for potential failures. Replacing a faulty starter or switch can often restore starting function.
  

2. Hydraulic System Failures
The hydraulic system is the heart of the JD 35ZTS, responsible for operating the boom, bucket, and other attachments. Hydraulic failures can manifest in various ways, such as slow movements or complete loss of functionality.
Diagnosis and Solutions:

• Hydraulic Fluid Levels: Low hydraulic fluid levels can cause sluggish or unresponsive operation. Always check fluid levels regularly and top up as necessary.
  
• Hydraulic Filter: A clogged hydraulic filter can obstruct fluid flow, resulting in poor performance. Replace the filter if it appears dirty or damaged.
  
• Pump and Valve Issues: If the pump or valves are malfunctioning, they can affect hydraulic pressure. Testing and replacing these components may be required.
  

3. Engine Overheating
Overheating can occur if the cooling system is not functioning properly, often due to clogged radiators or coolant leaks.
Diagnosis and Solutions:

• Radiator Cleaning: Dirt and debris can build up on the radiator, blocking airflow and causing the engine to overheat. Clean the radiator regularly to ensure optimal cooling.
  
• Coolant Leaks: Inspect the cooling system for leaks, especially around hoses and the radiator. Tighten any loose fittings and replace worn hoses as necessary.
  

4. Tracking Problems
Sometimes, the tracks on the JD 35ZTS can become misaligned or wear unevenly, which can affect the machine’s ability to move efficiently.
Diagnosis and Solutions:

• Track Tension: Improper track tension is a common cause of tracking issues. Use the machine’s adjustment mechanism to ensure the tracks are properly tensioned.
  
• Track Wear: If the tracks are excessively worn or damaged, they should be replaced to maintain proper traction and stability.
  

Preventative Maintenance for the JD 35ZTS
To minimize downtime and keep the JD 35ZTS running smoothly, regular maintenance is essential. Here are some key areas to focus on:

1. Routine Inspections: Regularly inspect the machine for signs of wear, leaks, or damage. Pay special attention to the hydraulic lines, fuel system, and engine components.
   
2. Fluid Checks: Regularly check and change engine oil, hydraulic fluid, and coolant to keep the system running efficiently.
   
3. Track Maintenance: Check the track tension and inspect for any wear. Keep the tracks clean and well-lubricated to avoid premature damage.
   
4. Battery Care: Check the battery voltage regularly and clean the terminals to ensure the machine starts without issues.
   
5. Cleaning the Air Filter: A clogged air filter can reduce engine performance. Clean or replace the air filter as necessary.
   

Conclusion
The John Deere 35ZTS is a robust and reliable compact excavator, well-suited for work in tight spaces and on smaller construction sites. While it offers excellent performance and ease of use, like any piece of machinery, it requires regular maintenance and attention to ensure it operates at peak efficiency. By understanding the common issues that can arise with the JD 35ZTS and following a proactive maintenance routine, operators can extend the life of their equipment, reduce repair costs, and ensure reliable performance on every job.