The Bomag BMP851 is a complex machine featuring a hydraulic forward/reverse system, a high-frequency vibrator, and a powerful diesel or petrol engine (depending on the variant). The service manual is the manufacturer’s bible for keeping this machine in peak condition.
Take a thermal image of the exciter housing and hydraulic pump after 15 minutes of work. Compare to baseline. A delta of +15°C indicates bearing preload failure.
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
| Component | Bolt size | Torque (Nm) | |-----------|-----------|--------------| | Drum motor mounting | M10 x 1.5 (8.8) | 49 | | Articulation pivot nut | M24 (10.9) | 350 + 90° | | Hydraulic pump drive coupling | M8 | 25 | | Vibration bearing cover | M12 (10.9) | 85 | | Wheel lug nuts (transport) | M12 x 1.5 | 110 | | Engine mounting bolts | M10 (8.8) | 46 |
The BOMAG BMP 851 is a compact, double-drum vibratory roller designed for asphalt and soil compaction in confined areas. Its hydrostatic drive system, dual-frequency vibration, and articulated steering require specialized service procedures. This manual provides step-by-step instructions for maintenance, diagnostics, and repair. The Bomag BMP851 is a complex machine featuring
BMP 851 Service Training Manual | PDF | Valve | Pump - Scribd
The manual assumes run-time, but high-vibration applications degrade oil faster. Change hydraulic oil every 150 hours if compacting reinforced concrete rubble. Compare to baseline
The core function of the BMP851 is compaction. The manual details how the internal eccentric weights inside the drums operate and provides explicit instructions on replacing worn exciter bearings and seals to prevent fluid leaks. Troubleshooting Common Issues Using the Manual
Air-cooled Hatz engines rely heavily on clean cooling fins to prevent overheating.
Note: Always consult the specific machine serial number via BOMAG's official documents portal to confirm intervals. Change Oil and Filter Every 250 - 500 Hours Air Filter Clean/Replace Element Daily/As Needed Hydraulic Oil Check Level Hydraulic Filter Change Filter Every 500 Hours Fuel System Drain Water Separator Drum Bearings Every 100 Hours Vibration System Check Function Troubleshooting Common BMP851 Issues