The Komatsu PC550LC-11M0 Excavator is a high-efficiency, large-sized hydraulic excavator designed for heavy earthmoving, construction, mining, and infrastructure projects. With its powerful engine, precise hydraulic technology, and efficient performance, the PC550LC-11M0 excels in various complex and high-intensity working environments. The model also focuses on fuel economy and eco-friendly design, helping users reduce operational costs and enhance work efficiency.

Key Specifications

• Engine Model: Komatsu SAA6D170E-7
  
• Engine Power: 261 kW (350 hp)
  
• Operating Weight: 53,000 kg
  
• Max Digging Depth (Stick): 7,890 mm
  
• Max Digging Radius: 11,450 mm
  
• Max Digging Height: 10,490 mm
  
• Max Dumping Height: 7,680 mm
  
• Max Digging Depth: 7,430 mm
  
• Hydraulic System Working Pressure: 35.3 MPa
  
• Bucket Capacity: 2.5 m³
  
• Track Width: 800 mm
  
• Travel Speed: 3.4 km/h
  
• Swing Speed: 7.0 rpm
  
• Max Traction Force: 310 kN
  
• Minimum Swing Radius: 5,850 mm
  

The Zoomlion ZE155E-10 Excavator is a high-efficiency, environmentally friendly medium-sized hydraulic excavator, designed for earthmoving, construction, infrastructure development, and mining operations. Combining a powerful engine, advanced hydraulic technology, and optimized structural design, the ZE155E-10 delivers outstanding performance in complex work environments. This model not only enhances operational efficiency but also offers excellent fuel economy and eco-friendly features, making it an ideal construction machine for modern projects.
Key Specifications

• Engine Model: Cummins QSB7
  
• Engine Power: 120 kW (161 hp)
  
• Operating Weight: 15,500 kg
  
• Max Digging Depth (Stick): 6,000 mm
  
• Max Digging Radius: 8,700 mm
  
• Max Digging Height: 8,000 mm
  
• Max Dumping Height: 5,900 mm
  
• Max Digging Depth: 5,800 mm
  
• Hydraulic System Working Pressure: 34.3 MPa
  
• Bucket Capacity: 0.8 m³
  
• Track Width: 600 mm
  
• Travel Speed: 5.5 km/h
  
• Swing Speed: 8.8 rpm
  
• Max Traction Force: 135 kN
  
• Minimum Swing Radius: 4,900 mm
  

The CASE CX220C Excavator is a robust and reliable medium-sized hydraulic excavator designed for earthmoving, construction, mining, and infrastructure projects. Equipped with a high-performance engine and advanced hydraulic technology, the CX220C delivers outstanding performance in complex working environments. This model not only increases operational efficiency but also optimizes fuel economy and features an environmentally friendly design, helping users reduce operational costs and improve construction productivity.
Key Specifications

• Engine Model: FPT N67TE
  
• Engine Power: 123 kW (165 hp)
  
• Operating Weight: 22,000 kg
  
• Max Digging Depth (Stick): 6,300 mm
  
• Max Digging Radius: 9,800 mm
  
• Max Digging Height: 8,500 mm
  
• Max Dumping Height: 6,500 mm
  
• Max Digging Depth: 6,200 mm
  
• Hydraulic System Working Pressure: 34.3 MPa
  
• Bucket Capacity: 1.0 m³
  
• Track Width: 600 mm
  
• Travel Speed: 5.5 km/h
  
• Swing Speed: 9.0 rpm
  
• Max Traction Force: 150 kN
  
• Minimum Swing Radius: 5,200 mm
  

The IHI 80NX3 is a compact and powerful excavator designed for high productivity in confined spaces. It combines strong digging capabilities with excellent maneuverability, making it ideal for urban construction, landscaping, and other demanding tasks. With advanced features and reliable performance, this machine is suitable for a wide range of excavation tasks.

Specifications Summary

• Model: 80NX3
  
• Engine Model: Yanmar 4TNV98
  
• Engine Power: 55 kW (73 hp)
  
• Operating Weight: 8,000 kg
  
• Bucket Capacity: 0.28 m³
  
• Maximum Digging Depth: 5,430 mm
  
• Maximum Digging Radius: 7,780 mm
  
• Maximum Dumping Height: 5,440 mm
  
• Maximum Digging Force: 48.5 kN
  
• Hydraulic System Pressure: 24.5 MPa
  
• Pump Flow: 120 L/min
  
• Travel Speed: 4.5 km/h (low speed), 6.0 km/h (high speed)
  
• Track Width: 450 mm
  
• Max Climbing Ability: 30°
  
• Fuel Tank Capacity: 140 L
  
• Hydraulic Oil Tank Capacity: 75 L
  
• Cab: Fully enclosed, with air conditioning
  
• Maximum Digging Height: 6,270 mm
  
• Operating Environment: Suitable for urban construction, landscaping, and light-duty excavation tasks.
  

The ZOOMLION ZE485E-10 Excavator is a newly designed, high-efficiency and energy-saving hydraulic excavator suitable for a variety of civil engineering, mining, urban construction, and other complex applications. Equipped with advanced power and hydraulic systems, the ZE485E-10 provides outstanding operational efficiency and fuel economy. With its powerful digging ability and high reliability, the ZE485E-10 not only improves work efficiency but also significantly reduces operating costs, making it an ideal choice for construction enterprises.

• Model: ZE485E-10
  
• Operating Weight: 48,500 kg
  
• Standard Bucket Capacity: 1.8 m³
  
• Maximum Digging Depth: 7400 mm
  
• Rated Power: 210 kW
  
• Fuel Tank Capacity: 500 L
  
• Hydraulic Oil Tank Capacity: 370 L
  

• Total Length: 11,000 mm
  
• Total Width: 3000 mm
  
• Total Height: 3400 mm
  
• Track Length: 5100 mm
  
• Track Width: 800 mm
  
• Ground Clearance: 500 mm
  
• Platform Ground Clearance: 1200 mm
  

• Maximum Digging Height: 10,400 mm
  
• Maximum Unloading Height: 6250 mm
  
• Maximum Digging Depth: 7400 mm
  
• Maximum Vertical Digging Depth: 6000 mm
  
• Maximum Digging Radius: 10,500 mm
  
• Minimum Swing Radius: 3800 mm
  

• Engine Model: Cummins QSL9
  
• Displacement: 8.9 L
  
• Rated Power: 210 kW
  
• Cooling Method: Water-cooled
  

• Main Pump Type: Dual-pump Variable Piston Pump
  
• Main Pump Flow: 2 × 290 L/min
  
• Hydraulic System Pressure: 35 MPa
  
• Swing Motor Type: Axial Piston Motor
  
• Travel Motor Type: Axial Piston Motor
  

The Nissan N350 mini excavator is a popular compact machine used in various construction and landscaping tasks. One common issue users encounter involves the tow pressure valve, which plays a critical role in the hydraulic system by controlling the pressure during towing operations.
Symptoms and Problems
When the tow pressure valve malfunctions, operators might notice problems such as sluggish movement, poor hydraulic response, or difficulty in controlling the excavator’s functions. Sometimes, there can be abnormal noises or leakage in the hydraulic system, indicating valve wear or damage.
Causes
The primary reasons for tow pressure valve issues often include contamination of hydraulic oil, wear from prolonged use, or improper maintenance. Dirt and debris can clog the valve, while worn seals and components reduce its efficiency.
Diagnostic Steps
To identify a faulty tow pressure valve, it’s important to check hydraulic oil quality and levels, inspect for leaks, and observe the excavator’s hydraulic performance. Measuring system pressure and flow can help pinpoint valve problems. Some users recommend cleaning the valve and replacing seals as an initial approach.
Solutions and Maintenance
Regular hydraulic system maintenance is crucial to prevent valve failure. This includes changing hydraulic fluid at recommended intervals, using clean filters, and inspecting components for wear. If the tow pressure valve is defective, replacing it with a genuine or high-quality aftermarket part is advised.
Summary
The tow pressure valve is essential for the smooth operation of the Nissan N350 mini excavator’s hydraulic system. Timely diagnosis and maintenance can help avoid costly downtime and ensure consistent machine performance. Operators should pay attention to signs of valve issues and maintain their excavator’s hydraulic system according to manufacturer guidelines.

TPM Excavators are a series of hydraulic excavators known for their reliability and competitive pricing. Originating from China, these machines have steadily gained recognition in the global market, offering a balance of performance and affordability for various construction and excavation tasks.
Key Features and Models
TPM offers a range of models covering different weight classes and applications, including small, medium, and large excavators. Their designs typically emphasize durability, fuel efficiency, and ease of maintenance. Many TPM excavators are equipped with advanced hydraulic systems that provide smooth and precise control, enhancing operator productivity.
Performance and Usage
Users report that TPM excavators perform well in typical construction settings, including earthmoving, trenching, and site preparation. The machines generally feature engines that meet emissions regulations, contributing to cleaner operation. TPM also focuses on operator comfort, often incorporating ergonomic cabins with good visibility and noise reduction.
Market Position and Support
TPM excavators are positioned as cost-effective alternatives to more established brands, appealing especially to buyers with budget constraints or those seeking value for money in secondary markets. While the brand may not have the extensive dealer and service networks of global heavyweights, users note that spare parts availability is improving, and some regions have growing support infrastructure.
Summary
TPM excavators represent a practical option for users needing reliable hydraulic excavators at a competitive price point. Their combination of decent performance, reasonable operating costs, and improving support services makes them an increasingly popular choice in emerging markets and budget-conscious projects.

The Hyundai R420LVS is a heavy-duty hydraulic excavator designed for mining, heavy earthmoving, and large infrastructure projects. Equipped with a powerful engine and advanced hydraulic technology, it delivers excellent digging force and outstanding operational efficiency, while providing a comfortable cab to ensure operator comfort and safety.

• Model: R420LVS
  
• Operating Weight: 41,500 kg
  
• Machine Length: 10,870 mm
  
• Machine Width: 3,200 mm
  
• Machine Height (with cab): 3,220 mm
  
• Track Width: 600 mm
  
• Minimum Ground Clearance: 520 mm
  

• Maximum Digging Height: 11,050 mm
  
• Maximum Dumping Height: 7,730 mm
  
• Maximum Digging Depth: 7,730 mm
  
• Maximum Digging Radius: 12,210 mm
  

• Engine Model: Hyundai D6HB
  
• Rated Power: 258 kW (approx. 346 hp)
  
• Rated Speed: 2,000 rpm
  
• Emission Standard: China III / Euro III
  
• Fuel Tank Capacity: 500 L
  

• Main Pump Type: Variable displacement piston pump
  
• Maximum Flow: 2 × 225 L/min
  
• Working Pressure: 35 MPa
  

• Maximum Travel Speed: 5.5 km/h
  
• Maximum Gradeability: 35°
  
• Swing Speed: 10.5 rpm
  
• Braking System: Hydraulic brakes
  

• Standard Bucket Capacity: 1.8 m³
  
• Cabin: Fully enclosed air-conditioned cab with shock-absorbing seat, wide visibility, and comfortable operation
  

The Takeuchi TB128FR is a compact hydraulic excavator designed specifically for urban construction, landscaping, and operations in confined spaces. Its short tail design effectively reduces the working footprint, equipped with a powerful engine and advanced hydraulic technology to ensure stable and efficient performance.

• Model: TB128FR
  
• Operating Weight: 12,600 kg
  
• Machine Length: 5,500 mm
  
• Machine Width: 2,200 mm
  
• Machine Height (with cab): 2,830 mm
  
• Track Width: 450 mm
  
• Minimum Ground Clearance: 420 mm
  

• Maximum Digging Height: 7,900 mm
  
• Maximum Dumping Height: 5,500 mm
  
• Maximum Digging Depth: 4,600 mm
  
• Maximum Digging Radius: 8,800 mm
  

• Engine Model: Mitsubishi S4S-PTA
  
• Rated Power: 58.8 kW (approx. 79 hp)
  
• Rated Speed: 2,200 rpm
  
• Emission Standard: EU Stage IIIA compliant
  
• Fuel Tank Capacity: 120 L
  

• Main Pump Type: Variable displacement piston pump
  
• Maximum Flow: 130 L/min
  
• Working Pressure: 28 MPa
  

• Maximum Travel Speed: 5.5 km/h
  
• Maximum Gradeability: 30°
  
• Swing Speed: 10.8 rpm
  
• Braking System: Hydraulic brakes
  

• Standard Bucket Capacity: 0.34 m³
  
• Cabin: Fully enclosed with air conditioning and vibration-dampening seat for enhanced operator comfort
  

The CASE CX210C Excavator is a mid-sized hydraulic excavator suitable for various earthmoving projects, municipal construction, and infrastructure development. This model features powerful performance, an advanced hydraulic system, and comfortable operation, meeting the demands of efficient work in diverse conditions.

• Model: CX210C
  
• Operating Weight: 21,300 kg
  
• Machine Length: 7,720 mm
  
• Machine Width: 2,850 mm
  
• Machine Height (with cab): 3,100 mm
  
• Track Width: 600 mm
  
• Minimum Ground Clearance: 450 mm
  

• Maximum Digging Height: 9,700 mm
  
• Maximum Dumping Height: 6,700 mm
  
• Maximum Digging Depth: 6,200 mm
  
• Maximum Digging Radius: 10,200 mm
  

• Engine Model: FPT F5HFL413C
  
• Rated Power: 117 kW (approx. 157 hp)
  
• Rated Speed: 2,100 rpm
  
• Emission Standard: China Stage III
  
• Fuel Tank Capacity: 280 L
  

• Main Pump Type: Variable displacement piston pump
  
• Maximum Flow: 2 × 160 L/min
  
• Working Pressure: 34 MPa
  

• Maximum Travel Speed: 5.4 km/h
  
• Maximum Gradeability: 35°
  
• Swing Speed: 11 rpm
  
• Braking System: Hydraulic brakes
  

• Standard Bucket Capacity: 0.8 m³
  
• Cabin: Fully enclosed with air conditioning, shock-absorbing seat, and excellent visibility for enhanced operator comfort