Interpretation of the ISO 9374-4:1991 Standard, “Information to be Provided for Boom Cranes”
📌ISO 9374-4:1991, “Cranes—Information to be provided—Part 4: Boom cranes,” is the standard for providing information on boom cranes. The standard specifies the scope and requirements for the information that manufacturers of jib cranes must provide to users, including technical specifications, operation and maintenance manuals, installation drawings, and spare parts lists.
Technical Specifications Information Requirements
ISO 9374-4:1991 requires that manufacturers of jib cranes provide users with technical specification information that is complete, accurate, and in a standardized format—the technical specification sheet should include the crane model, serial number, date of manufacture, and design working class (determined by a combination of utilization class and load condition, ranging from A1 to A8). Structural parameters—load tables for the rated lifting capacity at various boom lengths (lifting capacity-boom length curves), maximum lifting moment, maximum and minimum boom lengths, and hoisting height curves. Mechanism Parameters—Operating speeds of each mechanism (hoisting speed, boom swing speed, slewing speed, and travel speed) and drive methods. Weight Parameters—Total machine weight, counterweight, and maximum wheel load.
Technical specifications should be marked on the equipment nameplate—the nameplate should be made of stainless steel or aluminum alloy (for outdoor corrosion resistance), and the information on the nameplate shall include the manufacturer’s name and trademark, model number and serial number, year of manufacture, rated lifting capacity and maximum lifting moment, applicable jib reach range, duty class, dead weight, and total machine weight. The nameplate shall be installed in a prominent location on the lower part of the crane (on the standard section at the base of a tower crane or on the portal crane’s support columns). The standard also requires that load tables and load-capacity curves for various operating conditions be provided—these should be affixed inside the operator’s cab for easy reference at all times.
Operation and Maintenance Manual
Standard Requirements for Manual Content—Each jib crane must be delivered with an operation and maintenance manual (prepared in accordance with ISO 9928-1), and the manual’s content must cover all stages of the equipment’s life cycle. The operating manual section should include an overview of the entire machine (schematic diagrams and key parameters), safety operating instructions (pre-operation checks, operating procedures and prohibited actions, and descriptions of safety devices), operating instructions for each mechanism (hoisting/boom swing/ slewing/travel), emergency operating instructions (emergency stop, troubleshooting procedures, and manual release operations), and instructions for using the load chart (a reference table of rated lifting capacities for various boom angle and boom length combinations).
The maintenance manual section should include a daily, weekly, monthly, and annual inspection and maintenance schedule (covering inspection items, intervals, and standards), lubrication charts (showing the locations of each lubrication point, lubricant types, and lubrication frequency), and electrical and hydraulic system diagrams (circuit schematics, hydraulic schematics, and piping layout diagrams) , and a list of wear-prone parts (names, specifications, model numbers, recommended brands, and ordering information). Manual Update Management—Following a product upgrade or update to standards, a new version of the manual or a change notice must be sent to users within 90 days.
| Information Category | Provide Content | Form | Time Available |
|---|---|---|---|
| Nameplate Information | Model/Specifications/Part Number | Stainless Steel Nameplate | Upon delivery of the equipment |
| Technical Specifications | Load Curves/Parameter Tables | Print + Digital | Upon delivery |
| Operating Manual | Operations/Safety/Emergencies | A4 Binding | Upon delivery |
| Maintenance Manual | Maintenance/Lubrication/Spare Parts | A4 Binding | Upon delivery |
| Electrical and Hydraulic Diagram | Schematic/Layout Diagram | Digital Edition | Upon delivery |
| Spare Parts List | Name/Specifications/Order Number | Print + Digital | Upon delivery |
Installation Information and Spare Parts Information
The standard requires that the installation information provided by the manufacturer cover: foundation drawings (foundation type, dimensions, anchor bolt layout, and load parameters); installation procedures (step-by-step installation process, lifting plan, bolt pre-tightening torque, and assembly clearance requirements) , commissioning procedures (steps and acceptance criteria for no-load and load commissioning), and inspection criteria (post-installation acceptance standards and inspection items). Installation drawings must include anti-counterfeiting watermarks and signatures approving the design, and the drawing version number must be linked to the equipment’s serial number.
Spare Parts Information Requirements—The manufacturer shall provide a spare parts list covering at least 10 years of equipment operation. The spare parts list shall include part numbers, names, specifications and models, materials, quantity per unit, and recommended replacement intervals. Critical spare parts (such as gearbox gears, brake linings, steel wire ropes, sensors, etc.) shall be labeled with order numbers, and ordering instructions shall be provided. The standard also requires manufacturers to establish a spare parts inventory system (with a critical spare parts inventory rate of ≥80%) and to provide rapid delivery service during equipment downtime (shipping emergency orders within 24 hours).
Information Updates and Archiving Requirements
The standard sets requirements for the management of information updates and user records—following improvements to equipment design or updates to the standard, manufacturers must send updated information to users within 90 days. Users must file the updated information in the equipment file within 30 days of receiving the update. The retention period for the equipment file is no less than 5 years, starting from the date the equipment is put into service until it is decommissioned. The equipment file must include technical specifications, operation and maintenance manuals, installation and acceptance reports, all update/change notices, and records of repairs and modifications.
Krud Heavy Industry’s boom cranes come with a complete set of technical documentation upon delivery—including a stainless steel nameplate, a printed operation and maintenance manual (bilingual Chinese-English, A4 bound), technical specification sheets, and load charts (one for display in the operator’s cab and a pocket-sized backup copy), electrical and hydraulic schematics for the entire system (electronic PDF and hardcopy versions), and a complete spare parts list (including ordering guidelines and after-sales contact information). Users can download the latest version of the technical documentation via the service platform on Krude Heavy Industry’s official website. Lifetime technical support is provided after equipment delivery.
| File Name | Content | Forms of Provision | Storage Requirements |
|---|---|---|---|
| Technical Specifications | Specifications Table + Load Curves | Print + Digital | Archived with the device |
| Operating Manual | Operations/Safety/Emergencies | A4 Binding | Cab Mounting |
| Maintenance Manual | Maintenance/Lubrication/Spare Parts | A4 Binding | Archived in the Records Room |
| Basic Drawings | Base Dimensions/Bolts | Blueprints + Electronics | Permanent Preservation |
| Notice of Change | Release Notes | Email + Paper | Archived within 30 days |
Frequently Asked Questions
Q: What information does ISO 9374-4:1991 require boom crane manufacturers to provide?
Answer: Equipment nameplate (model/specifications/serial number), technical specifications and load curves, operation and maintenance manual (prepared in accordance with ISO 9928-1), installation drawings and instructions, electrical and hydraulic schematics, and spare parts list (covering ≥10 years). All information must be provided in full upon delivery of the equipment.
Q: What information must be included on an equipment nameplate?
Answer: Manufacturer’s name and trademark, model number and serial number, year of manufacture, rated lifting capacity and maximum lifting moment, boom reach range (minimum to maximum), duty class (A1 to A8), total machine weight, and counterweight weight. The nameplate is made of stainless steel or aluminum alloy.
Q: What is the deadline for manufacturers to send notifications of changes to technical information?
Answer: Following design improvements to the equipment or updates to relevant standards, the manufacturer must send a change notice or an updated manual to users within 90 days. Users must complete the filing process within 30 days of receipt. Krude Heavy Industry distributes update information through both its official website and email.
Q: How long should the spare parts list cover?
Answer: The standard requires manufacturers to provide a spare parts list covering at least 10 years of equipment use, including part numbers, names, specifications, quantities per unit, and recommended replacement intervals. The inventory rate for critical spare parts must be ≥80%, and urgent orders must be shipped within 24 hours. Krud Heavy Industry maintains ample inventory of spare parts for its entire product line.
