Service Manual For: Bomag Bmp851 [verified]
Look at the hydrostatic charge pressure. The manual details how to hook up a pressure gauge to the test port. If the pressure is low, the problem lies in the charge pump or a faulty bypass valve.
Note: Always verify the exact capacities against your machine’s specific serial number, as mid-generation design updates altered reservoir sizes. 3. Core Systems Breakdown Hydrostatic Drive & Steering System
An authentic Bomag service manual is not a quick-start guide. It is a technical document organized into detailed chapters. Here is what you can expect:
Change the hydraulic fluid entirely. Change the oil in the drum exciter housing. Check valve clearances on the engine. 4. Troubleshooting Common Issues Using the Manual service manual for bomag bmp851
travel motors, providing flow ratios and pressure limitations (250 bar high pressure). Maintenance Schedules
(typical):
This section establishes the baseline parameters for the machine. It includes engine displacement, operating weight, vibration frequencies, fluid capacities, and exact torque specifications for every major bolt. Operation and Maintenance Safety Look at the hydrostatic charge pressure
Always engage the mechanical articulation lock bar before lifting or transporting the machine, or working near the center pivot. Failure to do so can cause the machine to swing unexpectedly, causing severe crush injuries.
24 Liters (6.3 US gal) — use standard ultra-low sulfur diesel.
| If you need to... | The manual helps? | Notes | | :--- | :--- | :--- | | | Yes | Gives exact fitting torque and fluid type (ISO VG 46) | | Adjust the steering linkage | Yes | Shows eccentric adjustment on the orbitrol valve | | Replace the vibration bearing | Yes | Best section of the manual – use it | | Diagnose a no-start electrical issue | No | Get a multimeter and ignore the manual's wiring diagram | | Rebuild the propel pump | No | Only shows removal/installation, not internal repair | Note: Always verify the exact capacities against your
The BMP 851 uses a closed-loop hydrostatic circuit for drum drive and an open-loop circuit for vibration and steering.
Compaction plates generate intense vibration and hydraulic pressure. The service manual details lock-out/tag-out procedures, safe lifting points, and hydraulic pressure release protocols. Ignoring these can lead to severe injury.
Inspect, clean, or replace the filter element depending on site conditions.
To give you an idea of the manual's practical value, here is a daily maintenance checklist based on the official BMP851 guidelines:
: This is a comprehensive technical document designed for service engineers. It includes detailed sections on the diesel engine , travel system , vibration system , and electrical systems . You can find it hosted on Scribd .