Verify the optical/infra-red or radio connection link is active.
A comprehensive service manual for this model is typically broken down into several critical modules: 1. Technical Data and Specifications service manual for bomag bmp851
The "vibration" in this roller comes from the exciter system. The manual specifies the exact grade of oil needed to handle the high heat and friction of this component. Verify the optical/infra-red or radio connection link is