Product Introduction
The QAY400 prioritizes intelligent efficiency and safety reliability. Equipped with a closed-loop hydraulic system and computer-integrated control technology, it delivers smooth operation, excellent micro-movement control, and features such as lifting pressure memory. Its self-loading modular counterweight assembly enables convenient and secure counterweight attachment.
Product Advantage
Power and traveling performance, benz diesel engine, 12-speed automatic gearbox. Suspension system. Functions of automatic leveling, suspension lifting, elastic/rigidstate switch-over. Self-assembled technology counterweight researched & developed by ourselves, improves 30% the lifting capacity of medium-length boom effectively. Whole assembling process is finished by itself, no need for other equipment convenient and quick. Completely new assembling method is used. Only 30 minutes is enough for assembly, the working efficiency is improved greatly.
Super lifting performance. Fast automatically telescoping system improves operating efficiency. High strength wear sliders are available. Optional pulley, which parts of line is increased, makes more compact boom head. Driver's cab. Air cushioned seat, steering wheel adjustable in height and inclination. Ergonomic location of operating elements and indicators ensures simplification and comfort during continuous operation.
Technical Parameters
| Item | Unit | Parameter |
| Maximum rated lifting capacity × working range | t×m | 400×3 |
| Maximum rated lifting moment of main boom | t.m | 1200 |
| Length of main boom | m | 15.0~70 |
| Maximum length of jib | m | 42 (fixed jib)/78 (tower arm) |
| Lifting height of main boom | m | 70.5 |
| Maximum lifting height of jib | m | 135 (tower jib) |
| Range of luffing | ° | -0.5~82 |
| Rated power | kW/r/min | 240/2200 |
| Rated torque | Nm/r/min | 1300/1600 |
| Lifting boom full boom time | s | 90 |
| Full extension time of boom | s | 600 |
| Maximum hoisting single rope speed (fourth layer) | m/min | 130 |
| Rotation speed | r/min | 0~1.5 |
| Maximum counterweight weight | t | 120 |
| Maximum driving speed | km/h | 75 |
| Minimum ground clearance | mm | 355 |
| Approach angle | ° | 16.3 |
| Departure angle | ° | 16 |
| Maximum gradeability | % | 42 |
| Minimum turning radius | m | 12 |
| Outrigger span (longitudinal×horizontal) | mm | 9840×9000 |
| Overall dimensions (length×width×height) | mm | 19320× 3000×4000 |
| Total weight in driving state | t | 84 |
Product Uses
1. Mining and Quarry Operations
Suitable for lifting and transporting large ore blocks, stone materials, heavy equipment components, and installing pipelines in mining and quarry sites. Its robust chassis (seven-axle all-terrain chassis) and powerful off-road capability (maximum gradeability of 48%)—combined with specialized off-road tread tires and anti-slip differential locking devices—enable adaptation to rugged and harsh working conditions. However, special attention must be paid to terrain assessment, environmental protection, and equipment maintenance.
2. Large-Scale Infrastructure Construction
Widely deployed at major construction sites like highways and bridges for hoisting heavy precast components and large steel structures. Its exceptional lifting capacity (400 tons) and extended boom configuration (main boom + jib reaching 96 meters, with a lifting height of 120 meters) effectively covers extensive, challenging work areas—such as installing elevated bridge components for the Gaoxing Expressway project.
3. Wind Turbine Installation and Maintenance
Ideal for installing and servicing wind turbines. Its robust lifting capacity and extended boom (96-meter working radius) meet the height and weight demands of turbine component hoisting. Optional self-loading superlift devices, fixed extended jibs, and variable-length jibs further enhance operational adaptability.
4. Oilfield and Energy Base Construction
Deployed at oilfield and energy project sites for installing large equipment, transporting heavy pipes, and supporting maintenance operations. Its robust lifting capacity and environmental adaptability handle diverse construction needs, such as hoisting large reaction towers in chemical projects.
Product Operate Guide
The QAY400 features advanced technology (such as a single-cylinder cordless automatic telescoping system, computer-integrated control technology, and CAN-BUS bus control network), but safe and efficient operation requires standardized procedures. Operators must be certified, conduct thorough equipment inspections before each job, and strictly adhere to official load charts at all times. Overloading is strictly prohibited. Special attention to equipment maintenance is required when operating in harsh environments.
FAQ
1. WHAT SHOULD BE NOTED FOR BATTERY MAINTENANCE?
Keep the terminals clean, regularly check the electrolyte level and specific gravity, and disconnect the negative terminal during prolonged storage.
2. HOW TO TROUBLESHOOT A MALFUNCTIONING LIGHTING SYSTEM?
Inspect fuses, bulbs, switches, and wiring connections. Use a multimeter to measure voltage and continuity.
3. HOW TO REPLACE THE HYDRAULIC OIL FILTER?
Shut down and relieve pressure. Clean around the filter housing. Use specialized tools to remove the old filter. Install the new filter, ensuring the seal ring is properly positioned.
4. HOW TO ADDRESS ABNORMAL TIRE WEAR?
Check and adjust tire pressure and alignment parameters. Balance the wheels. Avoid overloading and sudden acceleration/braking.
5. WHAT SHOULD BE NOTED WHEN ADJUSTING TRACKS?
Adjust on level ground, maintain proper tension, and regularly inspect track pins and bushings for wear.
6. HOW TO REDUCE EXCESSIVE FUEL CONSUMPTION?
Maintain optimal engine operating conditions, optimize operating habits, avoid prolonged idling, and perform regular fuel system maintenance.
