Komatsu PC35 MR-2 Overview and Insights

[MikePhua]

The Komatsu PC35 MR-2 is a mini-excavator that has gained popularity in various industries for its performance, compact size, and efficiency. As part of Komatsu's MR series, this model offers a balance between power and portability, making it ideal for construction, landscaping, and utility work, especially in tight spaces where larger machines cannot operate. This article provides a detailed analysis of the Komatsu PC35 MR-2, its specifications, features, and the experiences of operators who have used the model. It also addresses common maintenance issues and troubleshooting, offering useful insights for both owners and potential buyers.
History and Development of the Komatsu PC35 MR-2
Komatsu, a global leader in heavy equipment manufacturing, introduced the PC35 MR-2 as part of its mini-excavator lineup, targeting operators who need reliable, powerful machines for smaller-scale, confined-area tasks. The MR-2 series is known for its reduced tail swing design, which allows for better maneuverability and the ability to work in tighter spaces compared to traditional full-sized excavators.
Launched in the early 2000s, the PC35 MR-2 quickly became a popular choice in urban construction, roadwork, and landscaping projects. It is engineered to provide high performance while ensuring ease of use and minimal downtime.
Key Specifications of the Komatsu PC35 MR-2
The Komatsu PC35 MR-2 is designed to offer robust performance with a variety of practical features. Here are some key specifications of this model:

• Operating Weight: 3,595 kg (7,930 lbs)
  
• Engine Power: 24.7 kW (33.1 HP) at 2,400 rpm
  
• Bucket Capacity: 0.09 – 0.14 m³ (0.12 – 0.18 yd³)
  
• Maximum Digging Depth: 3.45 meters (11.3 ft)
  
• Maximum Reach: 5.55 meters (18.2 ft)
  
• Overall Length: 5,395 mm (17.7 ft)
  
• Width: 1,960 mm (6.4 ft)
  
• Height: 2,520 mm (8.3 ft)
  

The PC35 MR-2’s operating weight makes it a mid-range mini-excavator that strikes a balance between power and size, making it ideal for smaller projects without sacrificing capability. It has a small turning radius, thanks to the reduced tail swing, which helps in urban and residential areas where space is limited.
Performance Features of the Komatsu PC35 MR-2

1. Hydraulic System: The hydraulic system of the PC35 MR-2 is designed for efficient power delivery and smooth operation. It ensures that the machine can handle demanding tasks such as trenching, lifting, and material handling with ease. The hydraulic system features Komatsu's advanced technology, which provides faster cycle times and increased fuel efficiency.
   
2. Reduced Tail Swing: One of the standout features of the PC35 MR-2 is its reduced tail swing, which allows operators to work in tight spaces without the risk of damaging surrounding structures. This is particularly useful when working in congested urban environments or on residential sites where large excavators cannot operate.
   
3. Operator Comfort: Komatsu placed a strong emphasis on operator comfort in the design of the PC35 MR-2. The cab is spacious and features an ergonomic layout, which reduces operator fatigue during long shifts. The easy-to-read control panel, adjustable seating, and low vibration levels all contribute to a comfortable working environment.
   
4. Fuel Efficiency: With a smaller engine size and efficient hydraulic system, the PC35 MR-2 offers excellent fuel efficiency, which is essential for operators who work on smaller projects and need to keep operating costs low. The model’s efficiency in fuel consumption makes it a popular choice for rental fleets and contractors working on budget-conscious projects.
   

Common Issues and Troubleshooting for the Komatsu PC35 MR-2
Like all machines, the Komatsu PC35 MR-2 may experience certain issues over time. Here are some of the most common problems and troubleshooting tips for operators:

1. Slow or Unresponsive Hydraulic Movements: If the hydraulic system becomes sluggish, it may indicate a problem with the fluid level, filter, or pump. Operators should check the hydraulic fluid levels regularly and ensure that the filter is clean. If issues persist, it might be necessary to inspect the pump for wear or damage.
   
2. Engine Starting Problems: Some operators have experienced issues with the engine failing to start. This can often be attributed to a weak battery or electrical connections. Ensuring that the battery is fully charged and that all wiring is in good condition can help resolve this problem. Regular maintenance of the starter motor and alternator is also important.
   
3. Uneven Digging Performance: If the excavator’s digging performance becomes uneven, it could be due to problems with the boom or arm cylinders. In some cases, air in the hydraulic lines can cause irregular movements. Purging the system and checking for any hydraulic leaks should be part of the maintenance routine.
   
4. Undercarriage Wear: The undercarriage is subject to constant wear due to constant movement and operation in harsh environments. Regularly inspecting the tracks for wear and tear and replacing damaged rollers or sprockets is essential to maintaining performance and avoiding costly repairs.
   
5. Electrical Faults: Electrical issues can sometimes arise with the Komatsu PC35 MR-2, particularly with sensors or wiring. Diagnosing these issues requires a thorough check of the electrical components and wiring. If sensors are malfunctioning, replacing them with new parts often solves the problem.
   

Advantages of the Komatsu PC35 MR-2

• Compact Size with High Performance: The PC35 MR-2 strikes a great balance between size and performance, making it suitable for small to medium-sized jobs that require both power and agility.
  
• Maneuverability in Tight Spaces: The reduced tail swing design allows the PC35 MR-2 to operate in confined spaces, making it an ideal choice for urban construction and residential projects.
  
• Fuel Economy: Operators appreciate the fuel-efficient nature of the PC35 MR-2, which helps keep operational costs low while maintaining productivity.
  
• Ease of Maintenance: The design of the PC35 MR-2 allows for easy access to key components for maintenance, helping to reduce downtime.
  

Final Thoughts
The Komatsu PC35 MR-2 is a reliable, fuel-efficient, and versatile mini-excavator that excels in tight spaces and provides excellent performance for small-scale construction projects. Whether used for digging, trenching, or lifting, this model proves to be a valuable asset in a contractor’s fleet. By performing regular maintenance and addressing common issues promptly, operators can extend the life of the PC35 MR-2 and ensure that it continues to perform at its best.
For potential buyers, the PC35 MR-2 represents a great option for those in need of a compact, high-performance excavator. However, it’s essential to be aware of the machine's typical issues and take proactive steps to maintain it properly to maximize its lifespan. With the right care, the PC35 MR-2 can be a reliable machine that adds value to any construction or excavation project.