The specific steps of winch maintenance are as follows:

?? 1) under normal operation, overhaul shall be carried out every certain time (about one year) or after a construction period, replace worn bearings and other vulnerable parts, and repair problems at any time

?? 2) if the building winch is not used for a long time, it shall be reused according to the newly installed building winch or the inspection and test method after overhaul. When transporting and maintaining the building winch, it shall be placed in a dry place, and all parts shall be provided with good moisture-proof, anti-corrosion and other measures

?? 3) during the operation of the winch, observe and check the action and wear of the brake, clutch and stopper at any time, and eliminate the fault in time.

?? 4) during disassembly and assembly, pay attention not to damage the mating surface, and check the wear of the friction surface. If it affects the use of the machine, it shall be replaced technically

?? 5) faults easily occurred in the operation of building winch and treatment methods:

?? (1) the clearance after brake wear is too large, which affects the braking reliability. Adjust the clearance or replace components in time

?? (2) if the bearing overheats due to wear or poor lubrication, improve the lubrication or replace the components according to the situation

?? (3) if the bearing vibrates due to the loose bolts fixing the bearing, tighten the bolts in time

?? (4) due to the heating of overload motor or motor bearing, it is necessary to stop the machine for cooling and add oil on time to reduce the load

?? 6) before checking the electrical equipment, the power switch must be turned on in advance, and the electrical appliances must be kept clean. For this reason, the dust, dirt, greasy, etc. must be cleaned regularly, and the contacts are not allowed to have oil. The burned or oxidized contacts shall be polished with fine sandpaper, and the insulating ring shall not be washed with gasoline. In order to prevent the contact surface of armature rust core from rusting, the machine lubricating oil shall be used regularly and then wiped clean, Each section of cast iron sheet of resistor shall be frequently checked for fracture. When the motor operates under the rated load, the allowable unbalanced voltage is 5% and the unbalanced current is 10%. At this time, pay attention to whether the rotation sound of the motor is abnormal, whether there is spark between the brush and the slip ring, and whether the heating of the motor shall not exceed the allowable value.