ZYS taper roller bearing assembly and the contact surface must be clean .

( 1 ) Maintenance Technical slewing crane mounted holder must have sufficient rigidity , the mounting surface should be smooth . Slewing bearing assembly prior to the stress should be treated to reduce maintenance crane slewing bearing deformation. Slewing bearing assembly and the contact surface must be clean .

( 2 ) the use of crane maintenance techniques should be noted that the noise changes and changes in rotation ZYS aviation bearing sistance moment , crane maintenance , if any irregularities should be overhauled .

( 3 ) Maintenance Technical slewing tower crane must lift or store level , not vertical lifting crane maintenance or storage, in order to avoid distortion.

( 4 ) maintenance crane technology in the bolt is fully tightened before the crane inspection and maintenance ZYS Bearing life testing machine techniques should be meshing gears , the gears meshing conditions should be consistent with the requirements of precision : the crane maintenance techniques that gear pair operating at a slight braking surface of the lower teeth the distribution of the contact spot on the tooth height direction of not less than 25% , crane maintenance technology in the longitudinal direction of the tooth is not less than 30%.