What Could Be the Problem If the Tower Crane Trolley Doesn't Move?
2 Answers
Tower crane trolley may not move due to reasons such as motor burnout, trolley fuse burnout in the distribution panel, open circuit in the trolley transfer switch control line (parallel connection of main control line switches), or phase loss caused by trolley power line open circuit. If it's simply the absence of forward or backward movement, it could be due to damage to the transfer switch or contactor. Introduction to Tower Crane Trolley: The tower crane, also known as a 'tower-type crane', is the most commonly used lifting equipment on construction sites. It is extended section by section (height) (referred to as 'standard sections') and is used to lift construction materials such as steel bars, wooden formwork, concrete, steel pipes, etc. The tower crane is an indispensable piece of equipment on construction sites. Certificates Required to Operate a Tower Crane Trolley: Operating a tower crane requires a special operation qualification certificate for tower cranes. Tower crane operators are classified into three levels: Primary (National Vocational Qualification Level 5), Intermediate (National Vocational Qualification Level 4), and Advanced (National Vocational Qualification Level 3).
I've seen this situation several times on construction sites when the tower crane trolley fails to move. The most common issue is electrical system failure, such as a broken control switch or blown fuse, which cuts off the power supply and immobilizes the trolley. Track blockage is another problem—dust and debris can get stuck, preventing the trolley from moving. Motor failures are also frequent; an aging motor may overheat and stop working. The activation of overload protection devices is another reason, as these safety mechanisms prevent accidents. I recommend first checking the control panel indicator lights—if they're not on, inspect the power supply. Then, check if the tracks are clear. Regular maintenance is crucial—don't slack off on cleaning the tracks and inspecting cables to prevent aging. For major issues, stop using the crane immediately and report the problem—safety first, don't push through. Emphasize these points when training new employees to reduce downtime.
