Field Services

Crane Inspections and Preventive Maintenance

An active inspection and preventive maintenance program is crucial to improving safety and productivity. Regular inspections and preventive maintenance activities help identify risks and opportunities for improvement while supporting compliance.

Crane inspections are designed to assess the safety of equipment, detect wear and tear and identify maintenance needs for safe, productive operation. Inspections can also verify that your equipment complies with current local standards and regulations, helping you avoid costly fines and disruption of operations.

In addition to regular crane inspections it is beneficial to develop a comprehensive plan of preventive maintenance, scheduled repairs and advanced services that take a deeper look at your crane and its components. With a coordinated program, you can more effectively maintain a safer, more reliable and compliant operation.

Remote Monitoring & Predictive Maintenance

Remote Monitoring is a key element of predictive maintenance. Remote monitoring is used to collect equipment condition and usage data which combined with your inspection and maintenance information enables a comprehensive view and analysis of equipment condition, maintenance and operation

Remote Monitoring provides you with crane usage and operating data to help you plan and schedule preventive maintenance. Brake Monitoring provides continuous knowledge of brake condition and detects brake faults. Remote Support gives you 24/7 access to a global network of crane experts and specialists, offering problem solving and troubleshooting to help reduce unplanned downtime

Predictive maintenance utilizes condition monitoring, advanced inspections, and data analytics to predict component or equipment failure. You can take advantage of predictive maintenance with our CARE Preventive/Predictive Maintenance program, helping you further optimize maintenance activities, reduce unplanned downtime and improve equipment safety, productivity and lifecycle value.

Retrofits & Corrective Maintenance

Retrofits are an efficient option to replace components or add current technology to your existing overhead crane. Common retrofits include replacement of hoists, components, electrics and/or controls, addition of new features, and/or technology upgrades and up-dates. Retrofits typically require minimal downtime, engineering and pre-planning.

Corrective Maintenance is carried out after a fault is detected and is aimed at restoring your crane to a condition in which it can perform its intended function. Timely repair of known faults reduces the likelihood of emergency breakdowns and is often mandated by regulation.

  • Minimize downtime with planned repairs
  • Extend the lifetime of your equipment
  • Expertise

We can help you create a Proactive, Predictive & Customized maintenance plan based on your equipment, application and duty cycle to reduce downtime and increase reliability.

Even the best products will fail without proper maintenance, and we pride ourselves on maintaining your equipment better than anyone else in the industry. We hire only qualified technicians with years of experience and we give them the tools that they need not only to inspect your cranes, but to fix them quickly and properly. Our techs are taught to not just be parts replacers but to get to the bottom of why a component fails. We have implemented a 5 why system in order to get to the root cause of chronic issues with overhead cranes. A couple of examples that we have used in the past are:

EXAMPLE 1 : Hoist Motor Failure Due To Poor Power ?


  • Motor Windings Overheated.
  • Motor not getting proper power – this was determined by motor rewind technician.
  • Motor Contactor points pitted excesively.
  • Contactor Chattering due to poor incoming power from buss bars.
  • Buss bars pitted due to frost build up on bars


Refurbish hoist motor, replace hoist contactors, honed down pitted section of buss bar and installed dual collectors with cleaning shoes to clear bar of frost What had been done by a previous crane company: Hoist motor had failed several times due to winding failure in the past, always when the customer was most busy. The previous service company had told the customer that they were using their crane too much and recommended installing a second crane on the same runway.

EXAMPLE 2 : Hoist Motor Failure Due To Overuse ?


  • Motor Windings Overheated.
  • Motor being used excessively in slow speed – this was determined by motor rewind technician.
  • Hoist was not properly specced when purchased from another crane company so it could not handle the heat build up in low speed.
  • Winding insulation too low of a grade and slow speed cooling lacking.
  • Electric motors normally provide only 1/6 – 1/4 as much cooling in low speed, even thought the produce almost as much heat in low speed as in high.


An upgrade to class H insulation in the motor allowed it to handle 30°C more heat, and a blower fan was installed that provides constant cooling to the motor in low and high speeds.

As you can see the same problems often require a different approach, in both cases it was imperative to have the motor rewind technician diagnose what had gone wrong with the motor so that an effective solution could be devised; a step that is all to often neglected by many service companies. In both cases the focus was to fix it for the long term and in both cases there has been no further failures.

KÜHNEZUG Customer Service
Tel.: +971 4 2525 711
Fax: +971 4 2567 125


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