The slew ring needed to be changed on the Grove RT 530E-2, as the crane was used in an application involving shock loads, which can lead to wear causing erratic movement in the bearing while slewing.
This bearing is to be inspected semi-annually. However, for this customer, we recommend quarterly checks, as the crane is used in an application involving shock loads, which may cause the bearing to fail prematurely.
By carrying out inspections with a dial gauge, to check slew bearing tolerance is the best way to know when it is needed to change your slew ring.
What happens when you don’t change your slew ring is that the bearings wear out, which causes instability when slewing.