The XCMG XE75GA is a 7.5-ton class compact excavator equipped with an energy-efficient and environmentally friendly power system and advanced hydraulic technology. It is suitable for municipal construction, landscaping, infrastructure projects, and various other working environments. The model features agile operation, strong power, a comfortable cabin, and intelligent control systems, improving work efficiency and operator comfort.

• Operating Weight: Approximately 7,500 kg
  
• Engine Model: Yuchai YC4A85Z-33
  
• Engine Power: Approximately 57 kW (77 HP)
  
• Rated Speed: 2200 rpm
  
• Maximum Digging Depth: Approximately 4,100 mm
  
• Maximum Digging Height: Approximately 6,960 mm
  
• Maximum Dumping Height: Approximately 4,940 mm
  
• Maximum Digging Radius: Approximately 7,010 mm
  
• Bucket Capacity: 0.28 - 0.33 cubic meters
  
• Track Shoe Width: 400 mm
  
• Minimum Tail Swing Radius: Approximately 2,630 mm
  
• Travel Speed: Low speed approx. 3.2 km/h, high speed approx. 5.4 km/h
  
• Hydraulic System Pressure: Main circuit pressure approx. 32 MPa
  
• Fuel Tank Capacity: About 100 liters
  
• Standard Features: Air-conditioned cabin, multifunction display, hydraulic quick coupler, automatic lubrication system, intelligent monitoring system
  
• Attachments: Various bucket sizes, hydraulic breakers, grapples, etc.
  

The Lovol FR210E2-H is a 21-ton class medium-sized excavator featuring advanced power and hydraulic systems, characterized by high efficiency, energy-saving, and environmental protection. This model is widely used in municipal construction, mining, forestry, water conservancy, and infrastructure projects. It offers excellent operational comfort and stability, capable of meeting various complex excavation demands.

• Operating Weight: Approximately 21,000 kg
  
• Engine Model: Lovol self-developed engine or Cummins engine
  
• Engine Power: About 117 kW (approximately 158 HP)
  
• Rated Speed: 2000 rpm
  
• Maximum Digging Depth: Approximately 6,100 mm
  
• Maximum Digging Height: Approximately 10,180 mm
  
• Maximum Dumping Height: Approximately 7,100 mm
  
• Maximum Digging Radius: Approximately 9,630 mm
  
• Bucket Capacity: 0.8 – 1.1 cubic meters
  
• Track Shoe Width: 600 mm
  
• Minimum Tail Swing Radius: Approximately 3,200 mm
  
• Travel Speed: Low speed approx. 3.2 km/h, high speed approx. 5.5 km/h
  
• Hydraulic System Pressure: Main circuit pressure approx. 34.3 MPa
  
• Fuel Tank Capacity: About 300 liters
  
• Standard Features: Air-conditioned cabin, hydraulic quick coupler, multifunction display, automatic lubrication system, intelligent monitoring system
  
• Attachments: Various bucket sizes, hydraulic breakers, grapple, etc.
  

The Jinggong JG75S-9 is a 7.5-ton medium-sized excavator suitable for municipal construction, landscaping, mining operations, and small to medium earthmoving projects. This model combines an efficient power system with advanced hydraulic technology, offering good operator comfort and flexible operational performance, making it suitable for various complex working conditions.

• Operating Weight: Approximately 7,500 kg
  
• Engine Model: Jinggong proprietary or Yuchai engine
  
• Engine Power: 55 kW (approximately 74 horsepower)
  
• Rated Speed: 2200 rpm
  
• Maximum Digging Depth: About 4,100 mm
  
• Maximum Digging Height: About 7,550 mm
  
• Maximum Dumping Height: About 5,400 mm
  
• Maximum Digging Radius: About 7,000 mm
  
• Bucket Capacity: 0.25 - 0.35 cubic meters
  
• Track Width: 400 mm
  
• Minimum Turning Radius: About 2,650 mm
  
• Travel Speed: Low speed about 2.7 km/h; high speed about 4.7 km/h
  
• Hydraulic System Pressure: Main circuit pressure about 24.5 MPa
  
• Fuel Tank Capacity: About 120 liters
  
• Standard Configuration: Air-conditioned cabin, multifunctional joystick controls, automatic lubrication system, hydraulic quick coupler
  
• Attachments Available: Various bucket sizes, hydraulic breakers, log grapples, etc.
  

This article compiles user experiences and evaluations of Vermeer brand excavators, discussing their advantages, performance, and suitable applications.
General User Feedback:
Build Quality and Durability

• Most users find Vermeer excavators to be robustly built with reasonable design, offering good durability.
  
• The machines perform reliably overall and are well-suited for small to medium earthmoving tasks and landscaping projects.
  
• Some users noted that parts tend to be durable with relatively low maintenance frequency.
  

• Vermeer excavators provide ample power with responsive hydraulic systems and smooth operation.
  
• Users are generally satisfied with digging efficiency and precision, making these machines ideal for detailed work.
  
• Some users highlighted excellent performance in muddy or complex terrain.
  

• Some users report relatively easy access to spare parts, though a few mentioned occasional delays in specific parts supply.
  
• After-sales service quality varies by region, but most users feel the manufacturer’s support is reasonably prompt.
  

• Vermeer excavators are widely regarded as reasonably priced with good cost-performance balance.
  
• They are suitable for buyers with budget constraints who still require reliable equipment.
  

• Some smaller models are reported to have slightly insufficient power, especially under heavier loads.
  
• The operator cab can be somewhat cramped, impacting comfort during extended operation.
  
• Maintenance manuals and technical support could be improved.
  

This discussion focuses on the maximum vertical digging depth of various small to medium-sized excavators, especially those ranging from 1 ton to 8 tons. Users shared their real-world experiences and advice on the topic.
Key Points:
Definition of Digging Depth
Vertical digging depth refers to the vertical distance from the ground level down to the maximum depth that the excavator bucket can reach.
Variations by Model

• Different excavator models vary greatly in vertical digging depth due to their design and structural differences.
  
• Examples:
  • Smaller machines like Komatsu PC26 and Hitachi ZX26 have digging depths around 3 meters.
    
  • Larger models such as Komatsu PC78 can reach about 4 meters or more.
    
  • Compact models like Kubota U27 or Bobcat E35 also achieve nearly 3 meters.
    

• Length and design of the boom and arm.
  
• Bucket size and configuration.
  
• Machine stability and working radius.
  
• Ground conditions and operator skill.
  

• Select an excavator model based on your required digging depth.
  
• Note that stated digging depths are reference values; in actual work, boom reach and width constraints must be considered.
  
• For deeper digging needs, some machines offer optional extended booms or longer dipper arms.
  

• Official manufacturer digging depth specs may vary considerably; practical, real-world measurements are often more reliable.
  
• It’s recommended to prioritize machines that perform well in your typical working environment.
  

The original poster is a new user whose H‑12 (also known as model "812") mini excavator’s hydraulic travel motor (hydraulic drive) has failed. They are seeking help to find a replacement unit or a suitable alternative solution.
🔍 Suggestions and Experience Shared by Forum Members

• Contact AGT Chicago
  Some users recommended reaching out to AGT in Chicago, USA, which reportedly stocks hydraulic drive motors specifically for the H‑12 and related mini excavator models. This should be the first point of inquiry.
  
• Disassemble and Compare
  If the exact motor model is unknown, it is advised to remove the existing motor and measure its dimensions and details. Then compare photos and data with suppliers or original Chinese parts catalogs to confirm model compatibility.
  
• Check Hanix H12A OEM Parts
  The Hanix H12A is very similar to the AGT H‑12, and many suppliers (like TVH) offer spare parts for it, including hydraulic motors, filters, and track components, which can be ordered or used for cross-reference.
  
• Wide Range of Spare Part Suppliers
  Websites such as Mini Excavator Centre (UK), L&S Engineers, TVH, ExcavatorParts.org, and others stock H‑12 series parts like pins, bushings, tracks, and motors. These platforms provide multiple replacement options.
  

• Prioritize contacting AGT Chicago to check for available complete hydraulic motors in stock.
  
• Remove and identify the existing motor’s model for precise part searching across multiple sources.
  
• Investigate Hanix H12A parts as many components are interchangeable.
  
• Use international parts distributors and platforms such as TVH, Mini Excavator Centre, and ExcavatorParts.org as supplementary options.
  
• If the above avenues do not yield results, consider contacting Chinese manufacturers or parts suppliers for custom replacements.
  

In this discussion, the original poster noticed several small hydraulic lines on the boom of their mini excavator that were thinner than the main hydraulic hoses and wasn’t sure about their purpose. They asked experienced users on the forum for explanations.
✅ Main Functions
Experienced users explained clearly:
These small hydraulic lines are mostly hydraulic return lines or pilot control lines.
They mainly serve two purposes:
1️⃣ Controlling Auxiliary Attachments

• These lines supply hydraulic oil to attachments like hydraulic breakers, hydraulic shears, rotary grapples, hydraulic log clamps, etc.
  2️⃣ Pilot Pressure for Valve and Movement Control
  
• The main hydraulic pump provides high-pressure oil for working functions, but the pilot circuit uses low-pressure oil to precisely control the opening and closing of valve spools, enabling smooth and accurate movements.
  

• These smaller lines usually run along the outside of the boom or arm, secured by metal clamps or brackets.
  
• Many mini excavator models reserve multiple auxiliary lines to facilitate future attachment installations.
  
• If the owner is not currently using attachments, these lines may be capped or left unused.
  

• If you plan to install attachments, check if the machine has quick couplers and control switches on the pedals or joystick, as many manufacturers pre-install these features.
  
• Some older models require retrofitting additional hydraulic lines; the thinner lines are usually pilot or return lines, while the main pressure lines are thicker.
  
• Regularly inspect these small hydraulic lines for wear and leaks since they are thinner and more prone to damage than main hoses.
  

In this discussion, the original poster asked:

Quote:“What tasks do you usually use a mini excavator for? What practical uses have you found?”

• Cleaning silt from home ponds
  
• Digging firebreaks
  
• Dragging trailers or removing large blocking rocks
  

Quote:“Mini excavators are versatile tools for homes, farms, and small construction jobs. Once you have one, its uses exceed your imagination.”

In this discussion, the original poster asked a very practical question:

Quote:“I’m planning to buy a used mini excavator. What should I pay attention to? What parts should I check?”

A common question raised by a user: When working in extremely muddy, slippery conditions, excavators tend to slip, spin tracks, dig themselves into holes, or even get stuck. Are there practical ways to increase traction?
Several experienced forum users shared these commonly used methods:
✅ 1. Use Track Pads or Grouser Bars
Some weld additional grouser bars (raised, thick ridges) onto steel tracks to increase “bite” on soft ground.
Drawback: This can cause serious damage to the surface and is not suitable where ground protection is needed.
✅ 2. Switch to Triangular or Deep-Grouser Track Pads
Track shoes with triangular or deeper ridges provide better grip than flat pads.
Ideal for machines used long-term in wetlands or muddy areas.
✅ 3. Lay Down Wooden or Steel Mats/Plates
Many small contractors prepare old railroad ties, thick wood planks, or scrap steel plates to lay on the travel path.
This not only prevents sinking but also protects the ground and facilitates quick retreat after backfilling.
✅ 4. Use Track Chains (Like Snow Chains)
Some users install specialized chains over the tracks during winter or extremely muddy conditions to improve grip, similar to tractor snow chains.
✅ 5. Adjust Construction Methods and Timing
Experienced operators recommend avoiding work immediately after heavy rain or on very soft soil.
If work must be done, start from firm ground, dig drainage ditches to remove standing water, then proceed cautiously.
✅ 6. Choose Appropriate Machine Types
Wetland-specialized tracks (wider and longer) reduce ground pressure and lower the risk of sinking.
Small excavators are easier to self-extract; large machines are much harder to free once stuck.
📌 Practical Tips
If stuck, avoid blindly flooring the throttle—it often makes the hole deeper.
Use the boom or arm to brace against the ground and slowly rock forward and backward to escape the pit.
Call another excavator or winch truck for rescue if needed.
✔️ Conclusion
Working in muddy wetland conditions is a common challenge for excavators without a universal solution.
Practical measures include improving track shoes, preparing mats, managing water drainage, and selecting the right timing and equipment. These approaches help reduce risks and improve operational efficiency.