What are the contents of the first-level technical maintenance of the crane

The first-level technical maintenance system for cranes refers to the work of maintenance and inspection once a month, which is mainly carried out by operating workers, with the cooperation of maintenance workers. The first-level maintenance content is more than the routine maintenance work. In addition to the routine maintenance content , the inspection and maintenance content includes :

Electric single-beam (or half-door) crane:

1.  Check whether all bolts are loose or lacking.
2.  Check the operating conditions of large and small cars, and there should be no phenomena such as rail gnawing, three fulcrums, and twisting when starting and stopping. Check the wear of the rim and tread of the wheel. The wear of the rim thickness should not exceed 50% of the original thickness, and the wear of the wheel tread should not exceed 3% of the original diameter of the wheel.
3.  Check the wear of the open gears of large and small cars.
4.  Check whether the cable bracket, small pulley, etc. are damaged or blocked.
5.  Check the wear of the rope guide of the electric hoist, and adjust or replace it appropriately.
6.  Do a good job of lubricating all parts of the vehicle

Bridge (Gate) Crane:

1.  Check that the wear of the brake pad pad should not exceed 50%, and the contact area between the pad and the brake wheel should not be less than 70%; check the installation and fixation of each pin and the wear and lubrication status.
2.  Check whether all the bolts are loose or lacking.
3.  Check the tightening of the bolts of the motor, reducer and other bases, and tighten them one by one.
4.  Check the lubrication condition of the reducer, the oil level should be within the specified range, and measures should be taken to prevent leakage at the oil seepage part.
5.  Lubricate the gears.
6.  Check the wear of the wire rope at the balance pulley, and lubricate the pulley and pulley shaft.
7.  Check the condition of the pulley to see if it is flexible, whether it is damaged or cracked, and pay special attention to the wear of the fixed pulley shaft.
8.  Check the brake wheel. The unevenness of the working surface should not exceed 1.5mm, the brake wheel should not have cracks, and its radial runout should be less than 0.3mm.
9.  Check the operating conditions of large and small cars, and there should be no phenomena such as rail gnawing, three fulcrums, and twisting when starting and stopping. Check the wear of the rim and tread of the wheel. The wear of the rim thickness should not exceed 50% of the original thickness, and the wear of the wheel tread should not exceed 3% of the original diameter of the wheel.
10.  Check whether the cable brackets, small pulleys, etc. are damaged or blocked;
11.  Keep the contactors, fuses, switches, etc. on the control panel of the power box clean to prevent leakage and short-circuit.
12.  Do a good job of lubricating all parts of the vehicle.

The crane user unit should do a good job of routine maintenance and inspection every month, and make corresponding records.

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