How to solve crane failure

Ellsen Double Girder Underhung Crane for Sale

People often say that the plan cannot catch up with the changes. The crane manufacturers have considered various faults and various undesirable factors in the design and development of cranes and improved and improved them, but we still have various kinds of cranes when we use them. Problems and failures.
For example, we are using cranes to lift goods, suddenly the crane fails, so we do not pay attention to the safety of lifting equipment? If there is no solution to the failure of the crane or other factors, it will easily lead to crane damage, and even lead to large-scale safety accidents.

What should we do when the crane suddenly fails?

Ellsen LB type explosion proof overhead crane for sale
Ellsen LB type explosion proof overhead crane for sale

Operational errors

The controller did not stop correctly at zero when parking. At this time, the brake solenoid did not lose power and the crane did not stop. However, the driver mistakenly believes that he has “stopped,” so he thinks that the rapid drop in load at that time is a brake failure.
The incorrect method of manipulating the controller handle is the root cause of this situation. Drivers lacking practical experience are not likely to find the cause of this situation quickly. Because the cause of the “fake-to-failure” brake has been eliminated after a point-in-vehicle or anti-vehicle operation.

 Contactor failure

Ellsen Single Girder eot Crane for Sale
Ellsen Single Girder eot Crane for Sale

When the down contractor of the PQR6402 control panel with two stages of reverse brakes fails to close, when the reverse brake stage is switched to the regeneration downgrade, the brake contactor is closed (the brake is released). The motor is not powered, so the hook will fall freely.
In this case, stop immediately. This kind of free fall of the hook is usually called the brake “failure.” However, it occurs when the controller is in the regeneration down position and the controller does not exist after the controller has returned to zero.

 Brake failure

In the event of a sudden brake failure, a point or reverse operation should be performed immediately. After the point-and-vehicle operation and the anti-vehicle operation, if the failure condition persists, it shall take effective and maneuverable emergency measures and issue a warning signal according to the situation at the time of the object.
If the work is close to the ground and there is no danger of falling, put the brake on the last block of the descent and use the normal method of operation to put the desired item down. It is not allowed to fall freely.

If the object is dropped directly in the original position and it will cause an accident, it is necessary to take the opportunity to open the anti-vehicle and turn the controller handle step by step to the last step in the ascending direction (pay special attention. Do not turn the control handle all of the time. The last file will cause the overcurrent relay to operate because of the excessive speed.

Overhead Top Running Crane Structure
Overhead Top Running Crane Structure

Tips to fix them

While turning the controller handle in the ascending direction, according to the specific situation, the size of the car (or torsion bar) is opened to a safe position and the object is dropped. When taking the above-mentioned measures, if it is raised once and the car (or torsion bar) cannot be driven to a safe position, it must be raised and lowered repeatedly.
When the hoisting mechanism controls the controller to return to zero, the hook cannot stop moving. This is called a brake failure. The sudden failure of the brake will cause the hook to fall rapidly, leading to major equipment accidents and personal accidents.

Each driver should have a high sense of responsibility, pay attention to pre-check pre-repair, to prevent the sudden failure of the brake accident. When the brake suddenly fails, the driver should calmly and calmly take reasonable measures to minimize or eliminate possible accidents and losses.Each driver should have a high sense of responsibility, pay attention to pre-check pre-repair, to prevent the sudden failure of the brake accident. When the brake suddenly fails, the driver should calmly and calmly take reasonable measures to minimize or eliminate possible accidents and losses.

Bridge Crane Safety Work Standards

Ellsen LB type explosion proof overhead crane for sale

Here Ellsen Overhead Bridge Crane Factory provides our tips for clients overhead crane operation facility.

Ellsen LB type explosion proof overhead crane for sale
Ellsen LB type explosion proof overhead crane for sale


Regulations crane operator must bear in their mind!

  • Operator and commander can start to work after passing the professional training and examination.
  • No lifting anybody. It must be with special safety measures, operated by the appointed driver, and set special person to conduct when lifting important things.
  • The weight of lifted object mustn’t be over the rated weight. No oblique lifting. No lifting the objects which buried in the ground and other locked objects.
  • When it happened to thunderstorms, fog, and over six levels strong winds, it mustn’t start to work. The hook should be lifted the highest position, crane running mechanism should be locked by rail clamp.
  • No using fire to get warm in the crane. No smoking when using oil to clean the parts. No throwing the waste oil and wipe material.
  • The crane must be equipped with the qualified fire extinguishing. When fire, you should immediately cut off the power, use the insulation fire extinguisher to put out the fire.
    When the crane has an electrical fault, it should be repaired by an electrician.
  • TheThe working light used for repair should be under 36V. The rated capacity of each fuse (piece) shall not exceed the specified value, and it must not be arbitrarily increased, not allowed to use the other wire (piece) instead.
Ellsen Electromagnetic Crane for Sale
Ellsen Electromagnetic Crane for Sale


Regular Inspection Work Ensures a Safe and Efficient Work

Crane running mechanism is equipped warning and alarm, check they are good when starting to work. Check whether the terminals of lifting steel wire rope are firm before starting, and they must be without bend and squeeze. Check whether each contactor is intact, the limiter switch is complete, the location is correct. Check whether wire and cable are without damage, each operating handle is intact. Check whether walking track has obstacles or not.
Check whether a contractor, limited switch, and brake are flexible for a no-load run. It can be put into operation after making sure that each mechanism is reliable.
The driver shall obey the command of professional lifting personnel. You can operate after getting the signal. It must be whistle before the operation, pay more attention to operating personnel. It must focus on working.

Ellsen Double Girder Grab Crane for Sale
Ellsen Double Girder Grab Crane for Sale


Smoking is not allowed, it is also not allowed to do something without the operating and chat with others. Do not leave your jobs during working. No operating after drinking.
During operated and lifted heavy objects by crane, only allowed to listen to the command of a special person. No matter who (include the non-commanding officer) sent an emergency signal, the driver must stop immediately. When lifting heavy objects, firstly lifting an object to 10mm away from grand and stop, continue to operate according to the command signal after making sure that the brake, bundle, lifting point and lifting tool are complete. Do not lift fiercely. No lifting heavy objects directly by using the hook.

When inspection, be Careful with the Safety

Ellsen 5 ton single girder overhead crane for sale
Ellsen 5 ton single girder overhead crane for sale


  • No standing above or below the object when lifting. The lifting objects are not allowed to across the top of the head.
  • When the lifted objects need to reverse running, you must first adjust the controller board to the zero position. When the agency has stopped and the object is completely smooth, it can do the reverse operation. No stopping by using the reverse operation. Try to avoid the emergency brake.
  • Pay attention to the hook lifting height to prevent the accident from lifting over the limit device.
  • No climbing the bridge crane when it is moving.

What does the overhead crane driver should do for his own safety facility?

European Standard Double Girder Travelling Bridge Crane for Sale
European Standard Double Girder Travelling Bridge Crane for Sale


The driver should stick to “Ten Don’t” regulations: No lifting when the gesture is not clear; no lifting when the weight is not specific and the light is dim; no lifting if the bundle is not firm and the heavy object bundle is not at the center; no lifting when passed the overload; crooked,pull, slanting lifting is prohibited; no lifting when somebody is at the lifting object and the lifting object is floating; no lifting the oxygen bottle, ethyne bottle and other flammable, explosive objects; no lift when the arris object is not underlaid; no lifting when the object is connected with the buried object; no lifting when the steel, iron water is over and the object does not install the fixed clip.

The above overhead crane inspection standards are just for your reference, wish clients can do the routine maintenance to promote your business safety and crane efficient performance. More specific information welcome to contact us, we have strong crane expert teams can solve all your problems.