MM55SR2 Excavator Overview

[MikePhua]

The MM55SR2 is a versatile and compact mini-excavator produced by the renowned manufacturer Takeuchi. Designed for working in confined spaces while maintaining exceptional digging power, the MM55SR2 is particularly favored in urban construction, landscaping, and utility applications. In this article, we will explore the key features, specifications, common uses, and maintenance considerations of the MM55SR2, providing a comprehensive guide for operators and maintenance personnel.
Introduction to Takeuchi and the MM55SR2 Model
Takeuchi, a Japanese company, has been at the forefront of mini-excavator development for decades. The brand is synonymous with durability, innovation, and reliability in construction machinery. Takeuchi’s focus on smaller, more maneuverable machines has made them popular among contractors who need heavy-duty performance in tight spaces.
The MM55SR2 is part of Takeuchi’s line of compact mini-excavators, designed to meet the needs of operators working in cramped environments such as residential construction sites or urban infrastructure projects. It combines the strength and power of larger excavators with the agility and flexibility of compact machines.
Key Features of the MM55SR2 Excavator

1. Compact Size for Tight Spaces
   • One of the standout features of the MM55SR2 is its compact size. With an overall width of just 5 feet, the MM55SR2 is ideal for navigating narrow alleyways and tight spaces between buildings, making it perfect for city construction projects or landscaping in confined areas.
     
2. Powerful Performance
   • Despite its compact design, the MM55SR2 offers impressive digging depth and lifting capacity. The machine is equipped with a 39.6 horsepower engine, which provides ample power for digging, lifting, and other essential excavating tasks. Its digging depth can reach up to 9 feet 6 inches, making it suitable for a range of excavation jobs.
     
3. Zero-Tail Swing Design
   • The zero-tail swing design ensures that the MM55SR2 can operate in tight spaces without the risk of hitting surrounding obstacles. This feature is particularly useful when working in congested urban environments where traditional excavators may struggle to maneuver.
     
4. Hydraulic System and Performance
   • The MM55SR2 uses a high-performance hydraulic system that delivers precise control over digging, lifting, and swinging movements. This system allows for smooth operation, even when performing tasks that require delicate control, such as trenching around utilities or working near other equipment.
     
5. Comfortable Operator Environment
   • The operator’s cab in the MM55SR2 is designed for comfort, featuring an adjustable seat, ergonomic controls, and a clear view of the work area. The machine’s hydraulic joysticks provide precise control, reducing operator fatigue during long work hours.
     
6. Versatile Attachments
   • The MM55SR2 is compatible with a variety of attachments, including augers, breakers, and buckets. This versatility makes it a great choice for contractors who need to switch between tasks such as digging, demolition, and trenching without needing multiple machines.
     

Specifications of the MM55SR2

• Engine Power: 39.6 horsepower (29.5 kW)
  
• Operating Weight: 11,200 lbs (5,080 kg)
  
• Maximum Digging Depth: 9 feet 6 inches (2.9 meters)
  
• Maximum Reach: 15 feet 2 inches (4.62 meters)
  
• Width: 5 feet (1.52 meters)
  
• Height: 8 feet (2.44 meters)
  
• Boom Swing: 60° to the left, 50° to the right
  
• Hydraulic Flow Rate: 15.9 gallons per minute (60.2 L/min)
  
• Bucket Breakout Force: 8,150 lbs (3,698 kg)
  

These specifications show that the MM55SR2 is engineered for both power and maneuverability, making it a versatile tool for a wide range of excavation and construction tasks.
Common Applications of the MM55SR2 Excavator
Due to its compact size and powerful performance, the MM55SR2 is widely used in the following applications:

1. Residential and Commercial Construction
   • The MM55SR2 is frequently employed in small construction projects such as digging foundations, trenching for utilities, and site preparation. Its compact size makes it perfect for navigating tight spaces around buildings and other structures.
     
2. Landscaping
   • In landscaping, the MM55SR2 is used for tasks such as digging for planting trees, leveling ground, and grading soil. Its precision and hydraulic control make it a great tool for shaping outdoor areas.
     
3. Utility Work
   • Utility companies rely on compact excavators like the MM55SR2 for trenching and installing pipes and cables in confined spaces. Its zero-tail swing and versatile digging capabilities allow it to work around existing structures and other underground utilities without disrupting the area.
     
4. Demolition
   • The MM55SR2’s hydraulic system and attachment compatibility make it a reliable option for small-scale demolition work, such as breaking up concrete, removing foundations, or dismantling smaller buildings.
     

Common Issues with the MM55SR2 and Troubleshooting Tips
While the MM55SR2 is a reliable piece of machinery, like any equipment, it may experience some issues over time. Here are a few common problems and troubleshooting tips:

1. Hydraulic Issues
   • Problem: The machine’s hydraulic system might lose pressure or fail to perform smoothly.
     
   • Possible Causes: Low hydraulic fluid, dirty filters, or a malfunctioning hydraulic pump.
     
   • Solution: Check hydraulic fluid levels regularly, replace dirty filters, and inspect the pump for wear or leaks.
     
2. Engine Overheating
   • Problem: The engine might overheat during extended operation.
     
   • Possible Causes: Clogged air filters, low coolant levels, or a damaged radiator.
     
   • Solution: Clean or replace air filters, check coolant levels, and inspect the radiator for obstructions or damage.
     
3. Tracks or Wheels Not Functioning Properly
   • Problem: The tracks may become loose or the wheels may experience irregular wear.
     
   • Possible Causes: Lack of proper tension, misalignment, or worn-out components.
     
   • Solution: Regularly inspect and maintain proper tension on the tracks, and replace worn-out components such as rollers or sprockets.
     
4. Electrical Problems
   • Problem: The machine’s electrical system might fail to start or the lights might malfunction.
     
   • Possible Causes: Weak battery, damaged wiring, or faulty fuses.
     
   • Solution: Check the battery voltage, inspect wiring connections for corrosion or damage, and replace any blown fuses.
     

Maintenance Tips for the MM55SR2 Excavator
To keep the MM55SR2 in top condition, regular maintenance is essential. Here are a few key maintenance tips:

1. Hydraulic System Maintenance
   • Change hydraulic fluid and filters according to the manufacturer’s schedule to ensure smooth operation.
     
2. Engine and Air Filter Checks
   • Regularly inspect and clean the engine air filters to prevent dirt from entering the engine. Ensure the radiator is clear of debris and the coolant is topped up.
     
3. Track Tension and Condition
   • Regularly check the track tension and replace worn-out parts, including the track rollers, sprockets, and idlers.
     
4. Battery and Electrical System
   • Keep the battery terminals clean and ensure the electrical system is functioning correctly by inspecting wires and fuses.
     

Conclusion
The Takeuchi MM55SR2 mini-excavator is a reliable and powerful machine that excels in applications requiring compact size and high performance. Its combination of versatility, ease of use, and rugged design makes it a top choice for contractors in residential, commercial, and utility sectors. With regular maintenance and proper care, the MM55SR2 can provide years of dependable service, helping operators achieve productivity and efficiency on a variety of job sites.