The yearly check of Electric Hoist related accessories advertent items: Brakes: repeat check monthly inspection requirements Wire rope: repeat check monthly inspection requirements Pulley, wheel groove uneven wear less than 3 mm. Wheel wear tank wall thickness iang is less than 20% of the original wall thickness, wheel at the bottom of the groove wear less than 25%, the diameter of the wire rope can not have other damage of steel wire rope defects. Gear shaft of wear, wear amount shall not exceed 1% of the original journal The other axis wear, wear amount shall not exceed 2% of the original axis Drum: can not have crack, wall wear is less than 10% of the original thick wall thickness Key: key and keyway links can not have loose and deformation and abnormal wear. Spline: can not have a wear and deformation Move the bearing: can not have damage and crack Oil seal: cooperate with surface crack in no Cable: repeat check monthly inspection requirements Collector, switch: repeat check monthly inspection requirements Circuit to ground insulation resistance: resistance shall not be less than 1.5 M Between charged body and the grounding screw resistance: resistance shall not be greater than 0.1