For protecting the bearing L1 und L3 on the drive unit.L1: 1x bearing ring 1.270.020.157, 1x circlip 1.270.016.112L3: 1x bearing ring 1.270.020.156, 1x circlip 1.270.016.114, 1x tube of grease 20g1x lifting-tool.Kompatibilitet:Performance Line Speed / CX(BDU4XX)Cargo Line / Speed(BDU4XX)