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What is the role of a hydraulic thruster on a tower crane?
Its primary role is to control the angle of the crane's jib (boom). By extending or retracting, it raises or lowers the jib, thereby changing the working radius (the distance from the crane's center to the load hook). This allows the crane to operate in confined spaces and avoid obstacles.
What are the main functions of the hydraulic thruster?
1. Jib Angle Adjustment: Precisely positions the jib to achieve the desired lifting radius.
2. Load Radius Control: Enables the crane to lift loads at varying distances from the mast.
3. Obstacle Avoidance: By raising the jib to a steeper angle, the crane can work over nearby structures.
4. Crowd Prevention: In crowded sites, it allows the jib to be kept at a high angle to avoid swinging over prohibited areas.
5. Stowing/Folding: Critical for folding the jib during crane assembly, disassembly, or transport.
What aspects need to be checked before daily operation of a hydraulic thruster?
1. Check for visible hydraulic oil leaks around cylinders, hoses, and connections.
2. Inspect hoses for cracks, abrasions, or bulging.
3. Ensure all mounting pins and bolts are secure and properly locked.
What should be paid attention to in routine maintenance?
1. Check hydraulic oil level and quality regularly.
2. Inspect cylinder rod surfaces for scratches, pitting, or corrosion that could damage seals.
3. Seal and Hose Integrity:
Replace hydraulic hoses at recommended intervals (even if no visible damage).
Address any seal leaks immediately to prevent dirt ingress and loss of pressure.
4. System Cleanliness:
Keep hydraulic connections clean when servicing to prevent contamination.
Use only the specified hydraulic fluid type.
Does cold weather affect machine operation?
Of course it will have an impact. Allow the hydraulic system to warm up in low temperatures before full operation to avoid sluggish response or seal damage.
Safety Critical Note:
Any malfunction or significant leak in the hydraulic thruster system must be reported immediately.
Do not operate the crane if the luffing system is faulty, as it could lead to uncontrolled jib lowering (dropping) or collapse.
