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
  

The Liugong CLG913E NEW2 Excavator is a compact wheeled hydraulic excavator suitable for urban construction, landscaping, pipeline laying, and various small to medium-sized projects. This model features flexible mobility, sufficient power, low fuel consumption, and comfortable operation, meeting the demands of diverse working conditions.

• Model: CLG913E NEW2
  
• Operating Weight: 9,800 kg
  
• Machine Length: 6,820 mm
  
• Machine Width: 2,450 mm
  
• Machine Height (with cab): 3,050 mm
  
• Tire Size: 16/70-20
  
• Minimum Ground Clearance: 360 mm
  

• Maximum Digging Height: 7,200 mm
  
• Maximum Dumping Height: 5,100 mm
  
• Maximum Digging Depth: 4,300 mm
  
• Maximum Digging Radius: 8,100 mm
  

• Engine Model: Yuchai YC4A85Z-50
  
• Rated Power: 78 kW (approx. 105 hp)
  
• Rated Speed: 2,200 rpm
  
• Emission Standard: China Stage III
  
• Fuel Tank Capacity: 150 L
  

• Main Pump Type: Variable displacement piston pump
  
• Maximum Flow: 170 L/min
  
• Working Pressure: 28 MPa
  

• Maximum Travel Speed: 32 km/h
  
• Maximum Gradeability: 30°
  
• Turning Radius: 6,000 mm
  
• Braking System: Hydraulic brakes
  

• Standard Bucket Capacity: 0.35 m³
  
• Cabin: Fully enclosed with air conditioning and shock absorption system for comfortable operation
  

The Lovol FR220E2 Plateau Excavator is specially designed for complex high-altitude conditions, featuring excellent power adaptability and environmental performance. This model has a compact structure, strong power, and a responsive hydraulic system, making it suitable for mining, infrastructure construction, and earthmoving tasks in plateau regions.

• Model: FR220E2
  
• Operating Weight: 22,000 kg
  
• Machine Length: 8,680 mm
  
• Machine Width: 2,990 mm
  
• Machine Height (with cab): 3,050 mm
  
• Track Width: 600 mm
  
• Minimum Ground Clearance: 480 mm
  

• Maximum Digging Height: 9,870 mm
  
• Maximum Dumping Height: 6,820 mm
  
• Maximum Digging Depth: 6,150 mm
  
• Maximum Digging Radius: 10,290 mm
  

• Engine Model: Lovol SC9D220G2
  
• Rated Power: 162 kW (approx. 217 hp)
  
• Rated Speed: 2,100 rpm
  
• Emission Standard: China Stage III
  
• Fuel Tank Capacity: 400 L
  

• Main Pump Type: Variable displacement piston pump
  
• Maximum Flow: 2 × 185 L/min
  
• Working Pressure: 34 MPa
  

• Maximum Travel Speed: 5.2 km/h
  
• Maximum Gradeability: 35°
  
• Swing Speed: 11.5 rpm
  
• Braking System: Hydraulic brakes
  

• Standard Bucket Capacity: 1.0 m³
  
• Cabin: Fully enclosed with air conditioning and efficient shock absorption for operator comfort
  
• Special high-altitude cooling system adapted for plateau environment
  

The GEHL 503Z excavator is a medium-sized hydraulic excavator suitable for construction, earthmoving, and infrastructure projects. It features a compact design and flexible operation, equipped with an advanced hydraulic system and efficient power to ensure operational efficiency and stability, meeting various working condition requirements.

• Model: 503Z
  
• Operating Weight: 5,300 kg
  
• Machine Length: 5,600 mm
  
• Machine Width: 1,900 mm
  
• Machine Height (with cab): 2,600 mm
  
• Track Width: 400 mm
  
• Minimum Ground Clearance: 350 mm
  

• Maximum Digging Height: 6,000 mm
  
• Maximum Dumping Height: 4,200 mm
  
• Maximum Digging Depth: 3,800 mm
  
• Maximum Digging Radius: 6,200 mm
  

• Engine Model: Yanmar 3TNV82A
  
• Rated Power: 24.6 kW (approx. 33 hp)
  
• Rated Speed: 2,200 rpm
  
• Emission Standard: China Stage III
  
• Fuel Tank Capacity: 70 L
  

• Main Pump Type: Gear pump
  
• Maximum Flow: 60 L/min
  
• Working Pressure: 20 MPa
  

• Maximum Travel Speed: 4 km/h
  
• Maximum Gradeability: 25°
  
• Swing Speed: 9 rpm
  
• Braking System: Hydraulic brakes
  

• Standard Bucket Capacity: 0.15 m³
  
• Working Device: Crawler excavator attachment
  
• Cab: Open cabin equipped with comfortable seat and simple control system
  

The LOVOL FR260E2-HD is a high-performance medium-sized hydraulic excavator designed for mining, infrastructure construction, and earthmoving projects. It features an advanced power system and intelligent hydraulic control technology combined with a robust structural design, providing strong operational capability and excellent durability to ensure efficient and stable operation under complex conditions.

• Model: FR260E2-HD
  
• Operating Weight: 26,000 kg
  
• Machine Length: 9,000 mm
  
• Machine Width: 3,000 mm
  
• Machine Height (with cab): 3,100 mm
  
• Track Width: 600 mm
  
• Minimum Ground Clearance: 450 mm
  

• Maximum Digging Height: 10,000 mm
  
• Maximum Dumping Height: 7,000 mm
  
• Maximum Digging Depth: 6,700 mm
  
• Maximum Digging Radius: 11,000 mm
  

• Engine Model: Cummins QSL9
  
• Rated Power: 194 kW (approx. 260 hp)
  
• Rated Speed: 2,100 rpm
  
• Emission Standard: China Stage IV
  
• Fuel Tank Capacity: 380 L
  

• Main Pump Type: Variable displacement piston pumps
  
• Maximum Flow: 2 × 240 L/min
  
• Working Pressure: 34.3 MPa
  

• Maximum Travel Speed: 5.5 km/h
  
• Maximum Gradeability: 35°
  
• Swing Speed: 11 rpm
  
• Braking System: Hydraulic brakes
  

• Standard Bucket Capacity: 1.2 m³
  
• Working Device: Standard crawler excavator attachment
  
• Cab: Fully enclosed cab equipped with air conditioning, shock-absorbing seat, multifunction display, and intelligent control interface, ensuring comfortable and efficient operation
  

The Sunward SWE35UF is a compact wheeled hydraulic excavator ideal for urban construction, landscaping, and small-scale earthmoving tasks. Featuring a flexible wheeled chassis, powerful engine, efficient hydraulic system, and comfortable operation, it meets diverse working conditions with high productivity.

• Model: SWE35UF
  
• Operating Weight: 3,500 kg
  
• Machine Length: 5,500 mm
  
• Machine Width: 1,860 mm
  
• Machine Height (with cab): 2,600 mm
  
• Minimum Ground Clearance: 320 mm
  

• Maximum Digging Height: 6,000 mm
  
• Maximum Dumping Height: 4,300 mm
  
• Maximum Digging Depth: 3,800 mm
  
• Maximum Digging Radius: 6,000 mm
  

• Engine Model: Cummins QSB3.3
  
• Rated Power: 27.8 kW (approx. 37.5 hp)
  
• Rated Speed: 2,400 rpm
  
• Emission Standard: China Stage IV
  
• Fuel Tank Capacity: 60 L
  

• Main Pump Type: Variable displacement piston pump
  
• Maximum Flow: 85 L/min
  
• Working Pressure: 32 MPa
  

• Maximum Travel Speed: 30 km/h
  
• Maximum Gradeability: 25°
  
• Swing Speed: 11 rpm
  
• Braking System: Hydraulic brakes
  

• Standard Bucket Capacity: 0.12 m³
  
• Working Device: Wheeled compact excavator attachment
  
• Cab: Fully enclosed cab equipped with air conditioning, shock-absorbing seat, and multifunction display for comfortable operation and good visibility