Hydraulic quick-connect couplings are transition and locking components installed between the excavator’s boom and attachments. They are compatible with all tonnage models of excavators, from mini to large. Their core function is to replace the traditional manual pin-mounting structure, eliminating the need for disassembling the pin, striking with a pry bar, or applying external force. A single operator can switch between attachments such as the bucket, breaker, steel grabber, sieve bucket, and pile driver.
Unlike ordinary adapters, hydraulic quick-connect couplings feature a double self-locking anti-detachment structure, which can counteract lateral torque and impact forces during construction, eliminating the risk of attachments falling off at heights. It also reduces boom transition clearance, minimizing wear on the pin and bushings, and extending the excavator boom’s lifespan. If your project requires hydraulic quick-connect couplings, contact us today, and we will provide you with product details and the best quote!
Excavator Quick Coupler Parameter
| Item/Model | Unit | YGMINI | YG45 | YG50/55 | YG60/65 | YG70/80 | YG90 | YG100/110 |
| Suitable Excavator | ton | 1.5-4 | 4-7 | 5-8 | 9-19 | 17-23 | 23-30 | 33-45 |
| Weight | kg | 25 | 50-60 | 80 | 120-130 | 280-290 | 420-430 | 450-580 |
| Length | mm | 388 | 534-545 | 600 | 765 | 924-944 | 983-1050 | 1006-1473 |
| Height | mm | 246 | 307 | 310 | 388 | 492 | 574 | 558-610 |
| Width | mm | 175 | 258-263 | 270-280 | 353-436 | 449-483 | 543-568 | 606-663 |
| Pin-to-Pin Center Distance | mm | 80-150 | 230-270 | 290-360 | 380-420 | 460-480 | 473-540 | 550-620 |
| Forearm Open Width | mm | 80-140 | 155-170 | 180-200 | 232-315 | 306-340 | 375-411 | 416-469 |
| Retractable Distance of Oil Cylinder | mm | 170-206 | 205-275 | 340-450 | 340-486 | 256-390 | 413-590 | 520-590 |
| Top-to-Bottom Pin Distance | mm | 159 | 195 | 195 | 220 | 275 | 300 | 360 |
| Pin Diameter | mm | 25-40 | 45-50 | 50-55 | 60-70 | 70-80 | 80-90 | 90-120 |
| Working Pressure | bar | 32-40 | 32-40 | 32-40 | 32-40 | 32-40 | 32-40 | 32-40 |
| Working Flow | Ipm | 10-20 | 10-20 | 10-20 | 10-20 | 10-20 | 10-20 | 10-20 |
Main Types of Excavator Quick-Change Adapters
Excavator quick-change adapters can be classified in various ways, including:
By working principle, they are divided into mechanical and hydraulic types. Mechanical quick-change adapters use pins or screws for locking; hydraulic quick-connect couplings use a cylinder-driven hook-shaped pressure block to lock or release the attachment pin.
Based on automation level: categorized as manual, semi-automatic, and fully automatic. Manual attachments require the operator to manually operate the coupling mechanism and insert a safety pin for locking. Semi-automatic attachments utilize a hydraulic piston rod, allowing the operator to complete coupling and locking without leaving the cab. Fully automatic attachments improve upon manual safety pin insertion by using a cylinder-driven hydraulic lock with an additional safety spring device, allowing the operator to complete all attachment changes from within the cab.
Based on locking technology: categorized as mechanical locking, mechanical + hydraulic locking, and fully hydraulic locking, employing safety devices such as hydraulically controlled check valves.
Features and Advantages of Excavator Quick Connect Coupling
- Increased efficiency and reduced costs: Attachment switching efficiency is increased by 90%, reducing manual labor and allowing for 2-3 more overlapping construction processes per day.
- Multi-purpose: One excavator can be equipped with multiple attachments, reducing equipment procurement costs.
- Convenient operation: Hydraulic couplings allow for attachment changes within the cab, reducing manual intervention.
- Wide compatibility: Customizable for all tonnages from mini excavators to 45-ton excavators; suitable for both new and existing excavators.
- Multiple Safety Protection Mechanisms: Equipped with safety devices such as a hydraulic check valve and a mechanical locking mechanism. The double safety design of the hydraulic check valve and mechanical locking mechanism effectively prevents accidental attachment or detachment during operation.
Key Points for Selecting Hydraulic Quick Connect Coupling
- Verify Size Compatibility: Accurately match the excavator tonnage, pin diameter, and stick inner width. For hydraulic models, confirm the oil circuit pressure and flow rate to avoid assembly problems and loss of digging force.
- Choose a Safety Locking Structure: Prioritize configurations with double self-locking or higher; for hydraulic models, choose models with both hydraulic and mechanical anti-detachment mechanisms; for demolition and mining operations, choose models with triple self-locking mechanisms; avoid simple single-clamp models.
- Differentiate Material and Manufacturing Process: Choose one-piece forged steel models for long-term heavy-duty work; choose thickened welded models for ordinary earthmoving; cast iron low-priced models are brittle and only suitable for short-term light-duty operations.
- Choose Type Based on Working Conditions: Choose mechanical models for infrequent attachment changes and low budgets; choose single-acting hydraulic models for frequent attachment changes; choose double-acting hydraulic models for heavy-duty operations such as crushing and mining.
- Check Parts and Maintenance: Standard configuration includes wear-resistant bushings, oil seals, and dustproof kits; prioritize models with universal wear parts and grease fittings for easy maintenance.
- Match Your Needs: Individual operators should choose mechanical models for mini excavators; municipal construction teams should choose single-acting hydraulic models; mining and demolition companies should choose heavy-duty double-acting models; rental stations should choose universal wide-gauge models.
YG Hydraulic Quick Connect Coupling Parts and Maintenance
YG hydraulic quick-connect couplings come with complete installation components, including hydraulic lines, solenoid valves, cylinders, and other core components. To ensure long-term stable operation of the equipment, users are advised to pay attention to the following maintenance points:
- Regular Lubrication: Perform maintenance on the quick connectors after every five alternating uses, injecting grease three times into each grease fitting during maintenance.
- Pipeline Inspection: Check the pipelines for leaks, damage, and connection conditions after every 120 hours of operation.
- Hydraulic Cylinder Inspection: Regularly check the hydraulic cylinders for damage and leaks.
- Cleaning and Maintenance: Before lubrication maintenance, clean the quick connectors of dirt or impurities.
- Safe Operation: Never put your hands inside the machine or touch rotating parts when operating quick connectors.
Excavator Quick Connector FAQs
Q1: Which is more cost-effective, hydraulic or mechanical quick connectors?
A: If attachments are changed less than 4 times per day and the budget is low, choose the mechanical type; if attachments are changed more than 6 times per day and high-risk operations are carried out on construction sites, prioritize the hydraulic self-locking type, which is more cost-effective in the long run by saving labor costs.
Q2: Can quick connectors be used interchangeably across tonnage classes?
A: Mixing different models is strictly prohibited. The model must be selected to match the excavator’s weight, pin diameter, and boom inner width. Mixing models across different tonnages greatly increases the risk of hook breakage or disengagement accidents. Contact YG customer service for a free model selection calculation.
Q3: What tonnage of excavators is the quick connector suitable for?
A: Quick connectors have a wide range of applications, compatible with everything from 1.5-ton mini excavators to 80-ton large excavators. YG brand products cover the complete tonnage range of 1.5-45 tons.
Q4: What is the difference between hydraulic and mechanical quick connectors?
A: Hydraulic quick connectors allow for control of the changeover from inside the cab via a hydraulic system, eliminating the need to get out of the vehicle and increasing efficiency. Mechanical quick connectors require manual operation of the locking device, eliminating the need for hydraulic lines, resulting in a simpler structure and lower cost. Hydraulic quick connectors are suitable for frequent changeovers, while mechanical quick connectors are suitable for infrequent changeovers or cost-sensitive scenarios.
Why Choose YG Hydraulic Quick Connect Coupling
As the original manufacturing plant, YG has its own forging and heat treatment workshop. Every quick-change adapter undergoes dynamic pressure testing, oil circuit sealing pressure testing, and locking and anti-detachment testing before leaving the factory. We do not produce non-standard, inferior, or scaled-down versions. We support customized sizes and modified electronic control systems to meet your needs, providing a one-stop solution to the three major pain points of hydraulic quick-connect coupling compatibility, safety, and maintenance. We are a high-performance, cost-effective source brand for construction machinery attachments. For overseas procurement and customized work conditions, please contact YG Machinery for complete solutions and quotations.
