Check the mounting bolts In order to compensate for possible establishment, it is necessary to retighten the bolts to the specified torque. This should be completed after no more than 100 hours of operation, and no external load is applied to the bolted connection. After every 700 hours, the operation should be repeated in the hospital or at least once every 6 months. The inspection period should be reduced under special operating conditions. In case of loose bolts, nuts and washers, replace all bolts, nuts and washers with new washers. 2.2 check that the wear of inclined clearance raceway leads to the increase of inclined clearance. Therefore, it is necessary to check the working time of the tilt gap after 700, or after 6 months at the latest. Check the increase of tilt clearance Δ k directly on the swivel ring. For the procedure of checking the increase of tilt clearance, see page 53. The value (m1) determined after installing the slewing bearing is considered as the basic value and deducted from the measured value (mx). The difference between mx and m1 shall not exceed 0.45 mm. The increase of tilt clearance Δ k will be converted into each measurement (after installation measurement) and compared to allow Δ k. For these two kinds of inspections: if the following situations occur, shorten the inspection interval to 200 working hours, and the measurement increment of the tilt gap is about. Maximum allowable increase of 75% tilt clearance. After further increase, reduce the inspection interval tilt gap again (50-100 working hours). If the maximum allowable increment reaches the tilt gap.

Check the mounting bolts In order to compensate for possible establishment, it is necessary to retighten the bolts to the specified torque. This should be completed after no more than 100 hours of operation, and no external load is applied to the bolted connection. After every 700 hours, the operation should be repeated in the hospital or at least once every 6 months. The inspection period should be reduced under special operating conditions. In case of loose bolts, nuts and washers, replace all bolts, nuts and washers with new washers. 2.2 check that the wear of inclined clearance raceway leads to the increase of inclined clearance. Therefore, it is necessary to check the working time of the tilt gap after 700, or after 6 months at the latest. Check the increase of tilt clearance Δ k directly on the swivel ring. For the procedure of checking the increase of tilt clearance, see page 53. The value (m1) determined after installing the slewing bearing is considered as the basic value and deducted from the measured value (mx). The difference between mx and m1 shall not exceed 0.45 mm. The increase of tilt clearance Δ k will be converted into each measurement (after installation measurement) and compared to allow Δ k. For these two kinds of inspections: if the following situations occur, shorten the inspection interval to 200 working hours, and the measurement increment of the tilt gap is about. Maximum allowable increase of 75% tilt clearance. After further increase, reduce the inspection interval tilt gap again (50-100 working hours). If the maximum allowable increment reaches the tilt gap.