Hitachi EX75UR Excavator Overview and Owner Insights

[MikePhua]

The Hitachi EX75UR is a compact and versatile mini excavator designed for various applications, particularly in urban or confined spaces. Known for its robustness and efficient performance, the EX75UR is favored by contractors and operators who need maneuverability without sacrificing power. This article dives into the key features, performance capabilities, common issues, and tips for owners of the Hitachi EX75UR.
Hitachi EX75UR: A Closer Look
The Hitachi EX75UR is part of Hitachi's line of mini excavators, designed to tackle a wide range of tasks, from digging trenches to lifting and placing materials in tight spaces. It is powered by a diesel engine that combines efficiency with strong performance, making it suitable for both light and medium-duty work on construction sites, landscaping projects, and even small-scale demolition.
Key Features of the Hitachi EX75UR

1. Compact Size for Urban Use
   One of the standout features of the EX75UR is its compact size. The "UR" in the model name stands for "Ultra-Reduced," indicating that this model has a reduced tail swing, which allows for better maneuverability in tight spaces. The reduced tail swing ensures that the machine can work close to walls, fences, and other obstructions without worrying about the counterweight hitting anything behind it.
   
2. Hydraulic System
   The EX75UR is equipped with a high-performance hydraulic system, designed to provide optimal power while maintaining fuel efficiency. The hydraulics offer smooth, precise control, making the excavator suitable for tasks requiring fine manipulation, such as grading, trenching, and digging around utilities.
   
3. Operator Comfort and Visibility
   Operators of the EX75UR benefit from a well-designed, ergonomic cabin that enhances comfort during long hours of operation. The cabin is spacious for a compact excavator, with easy access to controls, excellent visibility, and climate control options. Visibility is particularly important for mini excavators, as operators often work in tight spots and need a clear view of their surroundings.
   
4. Durability and Build Quality
   Like other Hitachi machines, the EX75UR is built with durability in mind. Its heavy-duty undercarriage, reinforced boom and arm, and rugged frame allow it to handle the demands of various job sites without compromising longevity.
   
5. Ease of Maintenance
   Maintenance is an essential aspect of any heavy equipment, and the EX75UR is designed for easy access to key components. Regular checks of the engine, hydraulic fluid, and tracks can be done with minimal hassle. The simple design and accessibility help reduce downtime and maintenance costs.
   

Performance Capabilities
The Hitachi EX75UR is powered by a 55.4-horsepower engine, providing enough muscle for digging, lifting, and other operations typically required by contractors. Its digging depth is approximately 4.3 meters (14.1 feet), and it has an operating weight of about 7.5 tons. This balance of size and power makes it an ideal choice for projects requiring a compact yet powerful machine.
In terms of lifting capacity, the EX75UR can lift approximately 3,300 pounds (1,500 kg), which is suitable for most material handling and lifting tasks on construction sites. It has a swing radius of 1.56 meters, allowing it to swing freely without obstruction in many working conditions.
Common Issues and Troubleshooting
Like any piece of machinery, the Hitachi EX75UR may encounter a few issues during its lifespan. Here are some common problems and troubleshooting tips for owners:

1. Hydraulic System Leaks
   Hydraulic leaks are a common issue that can affect the performance of any excavator, including the EX75UR. Leaks may occur due to worn seals or damaged hydraulic hoses. Regular inspection of the hydraulic system is crucial to detecting leaks early. Replacing worn components promptly can prevent further damage to the system.
   
2. Engine Overheating
   The engine in the EX75UR can overheat, especially in hot weather or when working for extended periods under heavy loads. Regular maintenance, including cleaning the radiator and ensuring proper coolant levels, can help keep the engine running at optimal temperatures. Additionally, operators should be mindful of the working conditions and avoid pushing the machine beyond its recommended limits.
   
3. Track Tension Problems
   Track tension is essential for smooth movement and stability. Over time, the tracks may become too loose or too tight, leading to wear and tear. Properly adjusting the track tension ensures the longevity of the tracks and helps maintain optimal performance.
   
4. Electrical Issues
   Electrical problems, such as malfunctioning sensors or faulty wiring, can disrupt the smooth operation of the EX75UR. Diagnosing electrical issues requires careful attention to the machine's wiring and component connections. Using a diagnostic tool can simplify the troubleshooting process.
   
5. Fuel System Blockages
   Fuel system issues, such as clogged fuel filters or air filters, can reduce the performance of the engine. Regular replacement of fuel filters and routine checks of the fuel system can prevent such problems from arising.
   

Maintenance Tips for the EX75UR
To maximize the lifespan and performance of the Hitachi EX75UR, it’s important to follow a regular maintenance schedule:

1. Hydraulic Fluid Checks
   Regularly checking and replacing the hydraulic fluid is essential for maintaining the smooth performance of the excavator. Contaminated or low hydraulic fluid can lead to poor performance and potential system damage.
   
2. Track Inspections
   Inspect the tracks for signs of wear and ensure they are properly tensioned. Track maintenance includes checking for cracks, excessive wear, and debris that could hinder movement.
   
3. Engine Maintenance
   Regularly check the engine oil levels, air filters, and fuel filters to ensure that the engine runs smoothly. Also, ensure that the cooling system is functioning properly to avoid overheating during extended use.
   
4. Check for Loose Bolts and Fasteners
   Over time, vibration can cause bolts and fasteners to loosen. Regularly inspect the machine and tighten any loose bolts to prevent more severe mechanical failures.
   

Conclusion: Is the Hitachi EX75UR Right for You?
The Hitachi EX75UR is a reliable, compact excavator ideal for tight spaces and projects that require maneuverability without sacrificing power. Its strong performance, durable construction, and ease of maintenance make it a great choice for many operators. However, like all machinery, it’s important to stay on top of routine maintenance and address any issues as they arise to ensure the long-term reliability of the machine.
For contractors and machine owners looking for a compact, high-performance excavator that can handle a variety of tasks with minimal hassle, the Hitachi EX75UR is certainly worth considering.