Maintenance of Mobile Cranes Proper mobile crane maintenance must be given the highest priority. Cranes are machines that feature a hoist chain and sheaves used to move load vertically and horizontall[...]
First, make sure all travel limit switches are functioning properly. Pay particularly close attention to the hoist upper travel limit switch. Always check to make sure the wire rope is not kinked, fra[...]
Plugging poses the greatest risk with contactor-controlled cranes. The practice can cause severe load swings for contactor-controlled cranes, plus it can wear out contactors prematurely and create fla[...]
Although crane design classes have different designations in different design standards, one thing remains constant: each crane and hoist has an intended Design Life, which determines the amount of wo[...]
Limit switches have practically limitless applications in regulating crane operation to prevent potential incidents. For instance, when ropes come out of groove or in preventing two trolleys from impa[...]
Evaluate the compliance status of your crane inspection and maintenance practices The Compliance Gap Analysis has been designed to render an expert opinion whether your current crane operations and ma[...]
When I cover the subject of side pulling in my crane operator training courses, I always tell my students that if someone tells them to do a crane pull, then they are not a responsible party. That’s[...]
Many older cranes operate on DC power because when those controls were built, DC was easier to supply and provided the power load necessary to drive large, robust pieces of equipment. But as technolog[...]
Overhead crane and hoists are typically designed to lift objects vertically. Sometimes, however, operators attempt to make a side pull, or use the hoist horizontally to lift an object that is not dire[...]
In order to ensure the safe operation of the crane, the crane is also designed with many safety devices, so that the security of the machine and the operator can be well protected in the event of an a[...]
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