The official manual contains decision trees for symptoms like:
Before we talk about the book, let's talk about the machine. The BMP 851 is a fully hydraulic, remote-controlled trench roller. Its claim to fame is the ability to offset the drums, allowing it to compact in trenches wider than the machine itself.
However, that offset capability creates complexity. service manual for bomag bmp851
Have you ever wondered exactly how tight the drum bolts should be? Over-tightening can strip threads; under-tightening leads to dangerous loosening during operation. The manual lists every bolt class and its corresponding torque value.
The BMP 851 uses eccentric weights inside each drum, driven by a dedicated hydraulic motor. The official manual contains decision trees for symptoms
Vibration motor specifications:
Common issues:
Bearing replacement procedure (front drum):