JB/T 11164-2011 is the industry standard governing the operation and maintenance of general purpose bridge cranes. It sets out the essential requirements for safe operation, routine maintenance, and fault handling. Proper adherence to the operating and maintenance procedures specified in this standard is key to ensuring safe crane operation and extending equipment service life.

Basic Operating Procedures

Pre-operation checks: Inspect the crane rail, load-handling device, and wire rope; perform a no-load test run of each mechanism through one full cycle to verify the brake and limit switch function; confirm the load weight does not exceed the rated lifting capacity; ensure the lifting path is clear; and verify hand signals with the signal person. Before lifting, use inching/jog mode for a trial lift — raise the load 100–200 mm off the ground, stop, and check that the brake holds reliably — then proceed with the full hoisting operation.

During operation: Hoisting and lowering should be smooth and controlled, avoiding sudden starts and stops. The load must be kept at least 500 mm above ground-level obstacles. When operating the crane bridge and trolley simultaneously, watch for load sway. Do not operate more than three mechanisms at the same time during lifting and transport. After shutdown, raise the hook to the upper limit switch, park the trolley in its designated position, and cut off the main power supply.

Safe Operation — Prohibited Practices

The standard explicitly prohibits the following: overloading (the load must be reduced immediately when the overload limiter alarms), angled lifting (when the hook and load are not vertically aligned, the resulting horizontal force component can cause overloading and tipping), and lifting buried or ground-anchored objects. Limit switches must never be used as a normal stopping method — they are safety protection devices, not operating controls.

Also prohibited: operating with known mechanical faults (e.g., brake slippage, wire rope wire breaks, or malfunctioning limit switches — the crane must be shut down for repair); moving loads over personnel; operating without hand signals; operating under the influence of alcohol or when fatigued; removing or bypassing safety devices without authorization; and leaving loads suspended for extended periods.

Routine Maintenance Requirements

Three-tier maintenance system: Check the brake operation, wire rope wear and lubrication, hook swivel freedom, and anti-drop device on a per-shift basis. On a weekly basis, inspect the oil level and condition of each reducer, check the coupling elastomer for aging, and examine the wheel flanges and tread surfaces for wear. On a monthly basis, verify the function of all safety devices, inspect the electrical cabinet contacts, and check the rail clamps and rail joints.

Regular lubrication: Change the oil in each mechanism's reducer after the first 500 hours of operation, then every 5,000 hours or every 12 months thereafter. Apply wire rope grease every 2–4 weeks. Grease all hinge points and bearings at the intervals specified in the lubrication chart. Kelude provides a complete lubrication schedule and maintenance manual with every crane.

Fault Diagnosis and Emergency Response

Basic fault handling principles: When a fault occurs, first lower the load slowly to the ground — if lowering is not possible, set up a warning zone and evacuate personnel. Cut power to the faulty mechanism and post a warning tag. For mechanical faults, check lubrication, fasteners, and worn parts first — abnormal noise is usually caused by bearing damage or inadequate lubrication, while excessive vibration typically points to poor shaft alignment in the coupling or worn crane wheels.

For electrical faults, check the power supply, fuses, and control circuit first. Brake slippage is most often caused by excessive brake clearance or oil contamination on the brake wheel. Personnel without maintenance qualifications must not dismantle safety devices. Common fault corrections: If brake clearance is excessive, adjust it to 0.5–1.0 mm; for wire rope derailment, check the pulley and wire rope compatibility.

Kelude Heavy Industry: Overhead & Gantry Crane Solutions

Kelude Heavy Industry is a professional manufacturer of industrial overhead cranes and gantry cranes. We provide comprehensive solutions for material handling, offering reliable performance and tailored designs for a wide range of applications.

What Sets Kelude Heavy Industry Apart?

With years of experience in the industry, Kelude Heavy Industry has established itself as a trusted partner for businesses requiring robust and efficient lifting equipment. Our commitment to quality is reflected in every crane we produce, from design and manufacturing to installation and after-sales support. We focus on delivering cost-effective solutions that enhance operational productivity and safety.

Our Product Range: Overhead & Gantry Cranes

We offer a diverse portfolio of crane systems to meet specific operational needs. Our product line includes single-girder and double-girder overhead cranes, as well as a variety of gantry cranes. Each system is engineered for durability, easy maintenance, and precise load control. Whether you need a standard configuration or a custom-engineered solution, our team works closely with you to ensure the right fit for your facility.

Key Features & Benefits

Our cranes are designed with advanced features to ensure safe and efficient operation. Key benefits include:

• High Lifting Capacity: Available in various capacities to handle loads from a few tons up to heavy industrial requirements.
• Low-Headroom Design: Optimizes the lifting height within your existing building structure.
• Explosion-Proof Options: Suitable for hazardous environments, ensuring compliance with safety regulations.
• Anti-Sway Technology: Provides precise load positioning and enhances operational safety.
• Durable Construction: Built with high-quality materials for long-lasting performance in demanding conditions.

Customized Solutions for Your Industry

We understand that every facility has unique challenges. Our engineering team can customize cranes to fit specific requirements, including span, lifting height, and control systems. We serve a variety of sectors, including manufacturing, automotive, logistics, and steel processing. By collaborating closely with our clients, we deliver solutions that improve workflow efficiency and reduce downtime.

Quality, Safety, and Compliance

Safety is a top priority at Kelude Heavy Industry. Our cranes are manufactured in accordance with international standards, including ISO 4301 for crane classification and IEC 60204-32 for electrical equipment. We implement rigorous testing procedures throughout the production process to ensure that every unit meets the highest quality and safety benchmarks. Our commitment to compliance gives you peace of mind and helps you meet regulatory requirements.

Global Service and Support

From initial consultation to installation and beyond, our dedicated support team is here to assist you. We offer comprehensive after-sales services, including maintenance programs, spare parts supply, and technical training. With a global network of partners, we provide timely and effective support to keep your operations running smoothly.

Frequently Asked Questions

Q: What is the typical lead time for a custom crane?
A: Lead times vary depending on the complexity of the configuration. Generally, standard models can be delivered within a few weeks, while custom-engineered solutions may take longer. We will provide a detailed timeline during the quotation phase.

Q: Do you provide installation services?
A: Yes, we offer professional installation services by our trained technicians. We ensure that your crane is installed safely and correctly, minimizing any disruption to your operations.

Q: Can you help with existing crane maintenance or upgrades?
A: Absolutely. We provide maintenance services and can upgrade existing cranes with modern features such as remote controls or variable-speed drives to enhance performance and safety.

Q: What safety standards do your cranes comply with?
A: Our cranes are designed and manufactured to meet international standards, including ISO 4301 for classification and IEC 60204-32 for electrical safety. We can also adapt designs to comply with specific local regulations upon request.

Q: How do I choose the right crane for my application?
A: Our team of engineers can help you assess your needs based on factors like load capacity, span, duty cycle, and operating environment. We'll recommend the most efficient and cost-effective solution for your specific requirements.

FAQ