LDA English versionThe operation and maintenance manual of the LDA type single-girder EOT Cranelow-voltage control ContentsⅠThe brief introductionⅡThe assembly and erectionⅢThe operationⅣThe maintena

e, and the flange plate. The end beam is a welded structure with high strength. The connection of the main girder and the end beam is made by high-strength bolts. The main girder is equipped with a trolley running platform, a trolley track, and a ladder for easy maintenance. The whole structure is reasonable, and the stress is evenly distributed, ensuring the stable operation of the crane.

2. The trolley and the hoist

The trolley is composed of a frame, a motor, a reducer, a brake, and a wheel set. The hoist is composed of a motor, a reducer, a brake, a drum, and a hook. The hoist can be either a CDI type electric hoist or an MDI type electric hoist. The trolley and the hoist run on the main girder through the wheels, and the running speed can be adjusted through the speed regulating device.

3. The electrical system

The crane is controlled by a low-voltage control system, which consists of a control box, a pendant control, and a power supply system. The control box is installed on the crane, and the pendant control can be either a wired control or a remote control. The power supply system includes a cable reel or a sliding contact line.

2. The assembly and erection

3. Before the assembly and erection, carefully read the installation drawings and the technical requirements, and prepare the necessary tools and equipment.

4. The assembly and erection should be carried out by professional technicians, and the installation sequence should be strictly followed.

5. The main girder and the end beam should be connected by high-strength bolts, and the tightness of the bolts should be checked regularly.

6. The trolley and the hoist should be installed and adjusted according to the technical requirements, and the running speed should be adjusted to meet the requirements.

7. The electrical system should be connected and tested by professional electricians, and the insulation resistance should be checked before the power is turned on.

8. The operation

9. Before the operation, check the crane and the hoist carefully, and ensure that they are in good condition.

10. The operator should be trained and qualified, and strictly follow the operation procedures.

11. During the operation, the load should be balanced, and the lifting height and the lifting speed should be controlled according to the technical requirements.

12. The operation should be stopped immediately if any abnormality is found, and the cause should be identified and eliminated before the operation is resumed.

13. The maintenance

14. Regularly check and maintain the crane, including the bolts, the wheels, the brakes, the electrical system, and the safety devices.

15. Lubricate the moving parts regularly, and replace the lubricating oil according to the technical requirements.

16. Clean the crane regularly, and remove the dust, the dirt, and the moisture.

17. Repair and replace the damaged parts in time, and ensure that the crane is in good condition.

18. The common faults and the trouble-shooting

19. The crane can’t start.

Trouble-shooting: check the power supply, the control circuit, and the motor.

2. The hoist can’t lift.

Trouble-shooting: check the brake, the reducer, and the hoisting mechanism.

3. The trolley can’t move.

Trouble-shooting: check the wheel set, the motor, and the running mechanism.

4. The crane shakes or vibrates during the operation.

Trouble-shooting: check the bolts, the wheels, and the running mechanism.

5. The crane makes abnormal noise during the operation.

Trouble-shooting: check the bearing, the gear, and the lubrication.

6. The notes

7. The crane should be operated by trained and qualified operators, and the operation should be strictly in accordance with the procedures.

8. The load should be balanced during the lifting, and the lifting height and the lifting speed should be controlled according to the technical requirements.

9. The crane should be regularly maintained and checked, and the damaged parts should be repaired or replaced in time.

10. The crane can’t be used in the inflammable, explosive, or corrosive places, and can’t be used to lift or handle melting metal.

11. The special points for attention

12. The crane should be operated within the rated capacity, and overloading is strictly prohibited.

13. The crane should be operated in a stable and flat place, and the ground should be firm and level.

14. The crane should be regularly inspected and maintained, and the safety devices should be checked and tested regularly.

15. The operator should wear safety helmets, safety shoes, and safety belts during the operation, and the other personnel should keep a safe distance from the crane