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QY75KC
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Product Introduction
The QY75KC is equipped with advanced hydraulic systems and electrical control technologies, ensuring high efficiency and ease of operation. Its strong build and reliable components make it a preferred choice for heavy-duty lifting tasks in various construction and industrial applications.
Product Advantage
High-power air-conditioners are equipped in driver' s cab and operator' s cab, heat transferring area of condenser is increased by 75%, displacement of compressor is increased by 20%, refrigeration effect is improved by above 25% relative to regular products, which meets the requirements of T3 working condition.
The layout mode of oil port of radiator is optimized, heat radiating area of core is increased by 50%, radiation power of hydraulic oil radiator is improved from 10kW to 18kW, permissible ambient temperature exceeds 55ºC, which meets the requirements for high temperature operation.
The protecting ply of wiring harness is produced according to QC/T29106-2004 Technical Conditions of Automobile Low-voltage Wiring Harness, heat-resistant temperature is increased to 105ºC, corrugated pipes are added for protection, protection class of plug-ins is IP67. The service life in high temperature operation exceeds 15 years.
Technical Parameters
| Parameter Item | Unit | Value |
|---|---|---|
| Overall Length | mm | 15000 |
| Overall Width | mm | 2800 |
| Overall Height | mm | 3785 |
| Wheelbase | mm | - |
| Track | mm | 2316/2063 |
| Traveling Total Mass | kg | 45805 |
| Self-Dismantling Counterweight Mass | kg | 18200 |
| Engine Model | - | D10.38-50 |
| Engine Rated Power | kw/(r/min) | 276kW/1900rpm |
| Maximum Travel Speed | km/h | ≥90 |
| Minimum Turning Diameter | m | ≤24 |
| Maximum Climbing Gradient | % | ≥45 |
| Approach Angle | ° | 19 |
| Departure Angle | ° | 13 |
| Maximum Rated Lifting Capacity | t | 75 |
| Basic Arm Maximum Lifting Moment | kN·m | 2921 |
| Basic Arm Maximum Height | m | 12.95 |
| Longest Main Arm | m | 50.5 |
| Longest Main Arm + Jib | m | 75.5 |
Product Uses
1. Infrastructure Construction and Municipal Engineering
The QY75KC is ideally suited for infrastructure projects such as roads and bridges, as well as municipal engineering. Its robust lifting capacity and maximum main boom length of 50.5 meters (with an optional jib extending to 75.5 meters) enable efficient completion of tasks like steel structure installation and large precast component hoisting, ensuring construction schedules are met.
2. Industrial Sites and Equipment Installation
This crane is widely used for installing, maintaining, and moving large equipment in industrial facilities (e.g., chemical plants, power construction sites). Its mature hydraulic system delivers excellent micro-movement control and smooth operation, making it suitable for precise positioning during lifting.
3. Ports, Terminals, and Logistics Transshipment
The QY75KC handles material transshipment and stacking operations at ports, terminals, and logistics parks. Its high travel speed enables rapid relocation, flexibly meeting demands across different work sites.
4. Urban Commercial Complexes and Confined Space Operations
With its relatively compact overall design (total length 15 meters, total width 2.8 meters) and agile maneuverability, the QY75KC adapts to space-constrained conditions like urban commercial complex construction and factory interiors for equipment hoisting and maintenance tasks.
5. New Rural Construction and Comprehensive Projects
The QY75KC is equally suited for diverse comprehensive projects in new rural development. Its excellent cost-performance ratio and broad adaptability empower users to undertake a wider range of construction tasks.
Product Operate Guide
Before operation, check that the outriggers are fully extended and ensure the ground is solid. Keep the crane level during operation and never overload it. Extend and retract the boom smoothly, maintaining a safe distance from surrounding obstacles. Rotate slowly and steadily, avoiding abrupt stops or turns. Regularly inspect the wire rope for wear. After completing work, retract the boom, secure the hook, and maintain daily equipment maintenance records.
FAQ
1. UNEVEN ROTATION SPEED BETWEEN LEFT AND RIGHT?
Asymmetrical make-up pressure in the swing motor, differing settings on the swing buffer valve, or resistance differences in mechanical components (e.g., bearings).
2. DELAYED RESPONSE IN THE LOAD-SENSING SYSTEM?
Blocked LS (load-sensing) orifices on LS lines, pumps, or valves, causing slow pressure signal transmission.
3. PUMP NOISE SIGNIFICANTLY INCREASES WHEN THE EXCAVATOR BUCKET CYLINDER REACHES ITS LIMIT POSITION?
Normal. At this point, system pressure reaches the relief valve set point, the pump operates in high-pressure bypass mode, and load is at maximum.
4. NEWLY REPLACED HYDRAULIC HOSES HAVE EXTREMELY SHORT SERVICE LIFE?
Excessive system pressure surges (e.g., slow relief valve response), or hose installation involving torsional deformation or friction can drastically reduce hose lifespan.
5. DOES THE REQUIRED FORCE TO MOVE THE CONTROL LEVER DECREASE AFTER THE ENGINE WARMS UP?
This is a normal physical phenomenon. As hydraulic oil temperature rises, its viscosity decreases, reducing resistance through the pilot valve.
6. DOES THE HYDRAULIC OIL BECOME DIRTY AGAIN SHORTLY AFTER REPLACEMENT?
This occurs when the tank and lines weren't thoroughly cleaned during oil change, or when the bypass valve on the replacement filter remains open, allowing contaminants to recirculate.
