Changing hydraulic filters, checking exciter oil, inspecting battery connections.
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| Maintenance Interval | Key Tasks & Specifications | Source Reference | | :--- | :--- | :--- | | | Check engine oil, hydraulic oil, and fuel levels. Inspect for leaks. Verify function of remote and emergency stop. | | | Every 250 Hours | Check the oil level in the exciter shaft bearing housing. This must be done when the machine is warm (after about 1/2 hour of operation with vibration). | | | Every 500 Hours | Air Filter Maintenance : Clean the dry air filter carefully. Replace the filter element after a maximum of 3 cleanings or at least once a year, regardless of hours. Important: Never use gasoline or hot liquids for cleaning. | | | As Needed | Hydraulic System : Use the BOMAG filling and filtering unit (Part No. 007 610 01) to fill the hydraulic system. This fine filter keeps oil clean and extends filter life. | | | Maintenance Interval | Key Tasks & Specifications
| | How to Get It | Key Details | | :--- | :--- | :--- | | Official BOMAG Source (Recommended) | Visit the official BOMAG website and use the "Machine Documents" search feature with your machine's serial number. | This is the safest method to ensure you receive the correct, model-specific, and up-to-date factory documentation. | | Official BOMAG App | Download the "BOMAG Service 4.0" app from your device's app store. | Provides direct access to technical documents, fault codes, and service partner info. You can also scan a QR code to read fault codes. | | RepairsAdvisor.com | Visit the product page for the BOMAG BMP 851 Schematic Diagram Manual. | Priced at $56.99 USD. Offers lifetime access, detailed diagrams, and step-by-step instructions. Format is a 1.1 MB PDF, with unlimited downloads. | | tradebit.com | Search for "BOMAG BMP851 TRENCH COMPACTOR PARTS MANUAL" on the website. | Priced at $14.95 USD. This is a PARTS manual, which is ideal for identifying and ordering components. It is a digital PDF file for instant download and is compatible with both Windows and Mac. | | | | Every 250 Hours | Check
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.
The manual is technically comprehensive and sufficient for professional maintenance, but it suffers from poor organization and ambiguous hydraulic diagrams.