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Which Parts of Overhead Bridge Cranes Are Important?

   Cranes or accidental failures of cranes that play a key role in production may cause significant production losses and may delay the delivery of products to customers. Therefore, some spare parts prepared in advance can be replaced in time to ensure the normal operation of the crane.


   Once it is determined which parts are critical to production in the crane or hoist, an analysis is needed to determine that these spare parts must be kept in inventory.

   Some factors that need to be considered when choosing wearing parts are:

  •            Frequency of overhaul and overhaul results.

  •            Crane or hoist uses age and failure history.

  •            Use records of repair parts.

  •            Current parts inventory.

  •            Delivery time of wearing parts for crane and hoist manufacturers.

   The monthly quality maintenance inspection will determine the wear and tear on the wearing parts that have been used for a long time, such as cranes and hoist trolley, drums, hooks, sheaves, hoist wire rope, chain load, so that they can be ordered and replaced in advance. Combining the results of maintenance inspections, add proper lubricating oil to the crane or hoist to extend the service life of wearable parts (such as bearings and gears).

   When the crane or hoist is aging, the longer wearing parts (such as motors, bearings and gears) are more likely to fail. In daily maintenance and inspection, many of these parts are not easy to fully inspect. The delivery time of the wearing parts of old cranes and hoists may take several months. To ensure safety, several weeks of reverse engineering must be carried out, and then the parts will be processed by a professional mechanical workshop.

   Parts with a history of multiple failures and common wear parts, such as wire ropes, current collectors and brake discs, should be kept in inventory to ensure that they can be replaced immediately when they are damaged during normal wear or use.



Crane drum

   The availability of key parts and components can be the biggest issue in determining which parts to store in inventory. Using the common replacement parts of the currently produced off-the-shelf hoist, for the factory, the delivery time is not a problem. In the case of lack of domestic stock or parts that require several months of production, you may be forced to transport parts by air or directly replace the equipment.

   Parts of cranes or hoists with large lifting tonnages are likely to be customized or specially processed orders. After the production of older hoist and end beam components or lifting models that are no longer manufactured, the production cycle of customized accessories will be longer, and the support for replacement parts is usually ten years.

   The inventory of accessories needs to consider crane components and characteristics. Different cranes need to prepare different accessories.


   Hoist and hoist trolley

   Frequently store vulnerable parts such as wire ropes, overloads, hook safety latches and brake discs for quick replacement and ensure the normal operation of the crane. The rope guides on many European style hoists should also be kept in inventory because they are easily damaged during use. For cranes or hoists with relatively large tonnage, inventory needs to be prepared in advance.

   The drums, hooks, dimensions and wheels on the end beams should be inspected and repaired as necessary before repairs. Before repairs, it is necessary to determine the condition of wear and tear in order to make a planned purchase. The delivery time for lifting and motors with complete brake components is usually very long. Preparing these spare parts in advance can ensure timely replacement of the crane and ensure normal work and work efficiency.

   For old equipment that has not been repaired, it is necessary to ensure the inventory of crane and trolley gearbox parts, as well as bearings and seals. The lead time of the old hoist gearbox parts may be very long.


   Crane end beam and motor

   The wear parts and wear conditions of the crane parts can be determined before maintenance. However, the bearings should be kept properly to prevent malfunctions. Please note that bearing failure may also cause damage to the wheels. Therefore, storing a complete wheel assembly with the bearing is the best choice. A motor with a complete brake assembly usually takes a long time to deliver, so it is necessary to prepare some accessories in advance to ensure the normal operation of the crane.


   Hoist and electrical control components

   It is always wise to prepare critical electrical components (such as all necessary fuses, transformers and contactor, and limit switches). In the case of a drive failure, hoists and variable frequency drives are also wise choices.


     Power supply components

   Always store spare current collectors, brackets, tensioners, etc. to avoid potential damage to the electrical system due to normal use. In addition to the normal power supply system, an additional power supply slip line needs to be prepared. However, if there is no excess slip wire, it is recommended to replace the festoon cable to prevent wire failure and subsequent short circuit.

   If you are not sure what spare parts should be prepared for crane and hoist maintenance, please contact us and we will help you.