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Outstanding Performance – Structure 3.0 Platform
Energy Saving & Consumption Reduction – i-ECO 1.0 System
35-ton class large cross-section main boom, with cross-sectional area increased by 10%, and strength improved by 15%
Integrated front-end structure with enlarged frame section, improving overall bending, torsion resistance, and reliability by 6%
Seamless regeneration technology (exclusive Yuchai version) enables automatic engine speed adjustment to reduce carbon buildup, allowing long-time operation without shutdown
Wider outrigger span, improving long-radius lifting performance by 7%
i-ECO fuel-saving technology matches engine torque to working conditions, improving energy efficiency and reducing fuel consumption by 20%
Advanced Control – i-EHC 2.0 System
Intelligent & Comfortable – i-Crane Smart Lifting System
Electro-hydraulic combined control system, delivering both fast response and high precision, greatly improving operability
Enhanced safety, with revolutionary improvements in lifting accuracy; radius and load precision increased by 50%, leading the industry
Pressure self-adaptive telescoping technology, ensuring smoother boom extension/retraction with reduced impact and eliminating vibration during small-angle retraction
More convenient operation, with standard features such as working condition recommendation and remaining radius indication
Smart display system in upper cab, enabling real-time monitoring of hydraulic working pressure
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Vehicle dimensions
| Model | STC250C5-8Pro | |||
Type | project | unit | parameter | |
Size parameters | Total length of the machine | mm | 13770 | |
Full width of the machine | mm | 2550 | ||
total height of the machine | mm | 3500 | ||
weight parameter | total mass of the machine | kg | 33100 | |
load | uniaxial and biaxial loads Three-and four-axis loads | kg | 7100 26000 | |
type | project | unit | parameter | ||
dynamic parameter | engine type | - | Yuchai YCK0830-66 | ||
maximum power of engine | kW/rpm | 230/2200 | |||
maximum engine torque | N·m/rpm | 1280/1200-1700 | |||
parameter of electric machine | Motor model | - | CRRC TZ220XS020A | ||
rated / rated power | kW/rpm | 60/600 / 80/2400 | |||
rated / value torque | N·m | 360/560 | |||
Driving parameters | maximum speed | km/h | 90 | ||
minimum turning radius | m | 10.5 | |||
approach angle / departure angle | ° | 21/12 | |||
maximum gradability | % | 47% | |||
Key performance parameters | fuel consumption per 100 km | L | ≤30 | ||
maximum rated gross lift | t | 25 | |||
Bottom rotation radius of turntable | m | 3.5 | |||
Leg span (lateral × longitudinal) | m | 6.4×5.5 | |||
length of crane boom | basic arm | m | 10.9% | ||
longest main boom | m | 43 | |||
longest main boom plus auxiliary boom | m | 51 | |||
maximum lifting moment | basic arm | kN·m | 1250.5 | ||
longest main boom | kN·m | 840 | |||
longest main boom plus auxiliary boom | kN·m | 408 | |||
axle weight | 1 | 2 | 3 | total weight |
axle weight A | 7.1 | 13 | 13 | 33.1 |
remarks | ||||
A-weighted | Number of pulleys | multiplying power | Hook weight/kg |
25 | 4 | 8 | 290 |
5 | 0 | 1 | 85 |
▲ Note: The rated load refers to the crane's rated lifting capacity, not the lifting mechanism's lifting capability. The lifting mechanism's capacity is determined by the maximum winch pull force multiplied by a factor.
working speed | project | parameter | Wire rope diameter / length | maximum single rope tension |
main winch | Single rope speed 0-30 m/min | 16mm/195m | 4.5t | |
auxiliary winch | Single rope speed 0-30 m/min | 16mm/110m | 4.5t | |
gyration | 0-2.8r/min | |||
Start/End Frame | 40s/50s | |||
Arm extension / arm retraction | 70s/90s | |||
Vertical leg extension/retraction | 20s/18s | |||
Horizontal leg extension/retraction | 20s/18s |