Bosch Service Kit Bearing Protection Ring BDU4XX Gen. 4

The Bosch service kit serves to protect the engine mount and is 100% accurate. The service kit consists of two different bearing and circlips, a grease tube and a Bosch lifting tool. The bearing protection ring is simply put on the bottom bracket / motor shaft behind the pedal crank. With the help of the bearing protection ring, the motor bearing is protected from coarse dirt and thus extends the life of the bearing seals and the Bosch motor.