Components such as brake pads, wire ropes, lifting hooks, and running wheels need to be replaced regularly on a crane, depending on the intensity of use and environmental conditions. Wear of crane components is a normal and unavoidable process, but timely replacement is essential for safe and reliable operation. In this article, we answer the most frequently asked questions about crane system maintenance and crane component wear.
How quickly do crane components wear in practice?
How quickly crane components wear depends heavily on the frequency of use, the load, and the environment in which the crane operates. A crane that is heavily loaded daily in a steel plant wears significantly faster than a crane used occasionally in a dry storage facility. On average, the most heavily loaded components show visible wear after just a few years.
Factors that accelerate the wear process include:
- High ambient temperatures or exposure to aggressive substances
- Frequent acceleration and braking of heavy loads
- Insufficient lubrication of moving parts
- Use beyond the rated lifting capacity
- Vibrations and shock loads during lifting
Regular visual inspection and keeping a maintenance log helps to detect wear in time before it leads to failures or unsafe situations.
Which crane components fail the fastest?
The components most susceptible to wear on a crane are brake pads, wire ropes, lifting hooks, running wheels, and bearings. These are the components that are directly loaded with every lifting movement and are therefore continuously exposed to mechanical and thermal stress.
An overview of the most vulnerable crane components:
- Brake pads: Wear quickly due to the repeated braking of loads. Worn brake pads increase braking distance and pose a direct safety risk.
- Wire ropes: Subject to fatigue, corrosion, and deformation from repeated winding and unwinding.
- Lifting hooks: Can deform, crack, or show hook twist under overload or prolonged use.
- Running wheels and rails: Wear from the weight of the crane and the load, particularly at high travel speeds or uneven loading.
- Bearings and shafts: Sensitive to wear with insufficient lubrication or contamination.
How often should wire ropes and lifting hooks be replaced?
Wire ropes must be replaced as soon as they show a certain number of broken wires, corrosion, deformation, or a measurable reduction in diameter. There is no fixed replacement interval in years, but with intensive use, replacement may be necessary after just one to two years. The lifting hook is replaced when visible deformation, cracks, or more than five percent permanent elongation is observed.
The European standard NEN-EN 13157 and associated machinery directives provide concrete criteria for assessing wire ropes. During an inspection, the following are examined, among other things:
- The number of broken wires per rope length
- Corrosion on the rope surface or in the core
- Kinks, pinch points, or knots in the rope
- Reduction of the rope diameter by more than seven percent
For the lifting hook, the safety latch, the hook nut, and the swivel connection must also be regularly checked. Replacing the complete hook assembly is often more cost-effective than replacing components individually.
What are the consequences of replacing crane components too late?
Replacing crane components too late leads to an increased risk of sudden failures, unsafe situations, and in the worst case, serious accidents. In addition to the safety risks for employees, worn components can also cause damage to the crane itself, the load, and the surroundings, resulting in high repair costs and unplanned downtime.
The most common consequences of delayed crane maintenance are:
- Production loss: An unexpected failure halts production, often at the most inconvenient moment.
- Higher repair costs: Worn components affect adjacent components, increasing the total damage.
- Liability risk: In the event of an incident caused by demonstrably deferred maintenance, the owner may be held liable.
- Rejection at inspection: A crane that does not meet safety standards is taken out of service until the defects have been remedied.
When is an annual crane inspection mandatory?
An annual crane inspection is mandatory in the Netherlands for all hoisting and lifting equipment that falls under the Working Conditions Act. This applies to virtually all professionally used cranes, regardless of type or lifting capacity. The inspection must be carried out by an accredited inspection body and includes both a visual inspection and a practical load test.
In addition to the annual inspection, periodic inspections are also required based on use and risk assessment. The legal basis for this is laid down in the Commodities Act Machinery Decree and the European Machinery Directive. Companies are required to maintain an inspection file with all inspection reports and repairs carried out. Without a valid inspection certificate, the crane may not be used.
How do you recognise that a crane component needs replacing?
A crane component needs replacing when there are visible signs of wear, deformation, corrosion, or damage, or when the performance of the component no longer meets specifications. In many cases, there are early warning signals that can be clearly identified during regular inspection.
Signals indicating the need for crane component replacement:
- Unusual noises during lifting, travelling, or braking
- Visible wear, cracks, or deformation on ropes, hooks, or wheels
- Longer braking distances or vibrating brake action
- Play in connections, bearings, or the hook assembly
- Rust formation or corrosion on wire ropes or metal connections
- Elevated operating temperature of motors or brakes
It is advisable to train operators to recognise these signals so that they can report deviations immediately. A structured inspection schedule, in which fixed checkpoints are reviewed at every shift or week, significantly reduces the risk of unexpected failures.
How we help with replacing crane components
At BKRS we understand that crane downtime has direct consequences for your production process. That is why we offer a complete package of maintenance services to ensure you always have a safe and properly functioning crane. Whether it involves replacing brake pads, wire ropes, or a complete hook assembly, we handle the entire process from diagnosis through to installation.
What we do for you:
- Periodic inspections and maintenance of your crane systems, including assessment of wear on all critical components
- Replacement of overhead crane components such as wire ropes, brake pads, running wheels, bearings, and lifting hooks
- Annual crane inspections as an accredited inspection body, ensuring your crane always meets legal requirements
- A dedicated point of contact who handles coordination, planning, and communication on your behalf
- Custom maintenance for non-standard crane systems, including complex configurations
Would you like to know more about our maintenance services for crane systems? Or do you have a direct question about replacing crane components in your situation? Contact us and we will be happy to think along with you.
Frequently Asked Questions
Can I replace crane components myself, or do I always need to call in a specialist?
For simple components such as grease nipples or protective covers, you can carry out small tasks yourself, but for critical components such as wire ropes, brake pads, and lifting hooks, it is mandatory to engage a certified specialist. Incorrect installation of these components can pose a direct danger to employees and the installation. Furthermore, professional replacement is a requirement to comply with the statutory inspection requirements.
How do I draw up a maintenance schedule for my crane?
A good maintenance schedule is based on the intensity of use, the environmental conditions, and the recommendations of the crane manufacturer. Divide the schedule into daily visual checks by the operator, weekly or monthly technical inspections, and an annual inspection by an accredited inspection body. A specialised maintenance company can help you draw up a customised schedule that suits your specific crane system.
What does deferring crane maintenance cost in the long term?
Deferred maintenance may seem cheaper in the short term, but almost always leads to higher costs through cascade damage to adjacent components, unplanned downtime, and expensive emergency interventions. You also run the risk of rejection at the annual inspection, which takes the crane completely out of service until all defects have been remedied. Preventive maintenance is structurally more cost-efficiënt than corrective intervention.
How long does it take on average to replace worn crane components?
The lead time depends on the type of component and the availability of spare parts. Replacing brake pads or a wire rope typically takes half to a full working day, while a complete hook assembly or bearings may require more time. By working with a dedicated maintenance service that knows your crane system and has parts in stock, you can significantly reduce downtime.