Bomag wrote this repair manual for the BMP 851 multi purpose compactor: factory publication 008 193 25, 272 pages in English. It covers the machine end to end: the control valve block with its solenoid and relief valves, tests and adjustments for the travel and vibration circuits, troubleshooting charts, vibrator unit repair, Danfoss hydraulic motor service, Ultra Hydraulics Powermax pump service, and a full repair section for the Hatz 2G 40 diesel.
When the machine dies at the edge of the cut and the crew is standing on a lift that still needs passes, the job usually stalls for want of one number: a nominal pressure, a coil current, a bearing procedure. The test and troubleshooting sections here give you that number instead of a guess.
Download the PDF, print the pages you need, and let them get dirty at the bench. The file stays clean on your laptop.
Complete the set for your BMP 851
- Operator Manual: Bomag BMP 851 Operator Manual
Other edition of this manual
What's Inside This Bomag BMP 851 Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety Regulations | 7-10 | General, Hydraulic System |
| General Notes on Repair | 11-12 | General, Electric System |
| Tightening Torques | 13 | Torques for Bolts with Metric Unified Threads |
| Control Valve Block Overview | 14-16 | Control Valve Block, Port Connections, Solenoid Valves, Relief Valves |
| Tests and Adjustments | 17-32 | Rotary Speeds, Travel Circuit Pressure, Vibration Circuit Pressure, Leak Oil Rate, Travel Motor Testing |
| Trouble Shooting Charts | 33-54 | Drive Power Issues, High Pressure Relief Valves, Vibration System Faults, Engine Speed, Shuttle Valve |
| Vibrator Unit Repair | 55-64 | Vibrator Unit Disassembly, Bearing Replacement, Shaft Removal, Assembly Procedures |
| Danfoss Hydraulic Motor Service | 65-96 | Omt Motor Dismantling, Tacho Connection, Gearwheel Set, Seal Replacement, Series 0 and 1 Specifications |
| Ultra Hydraulics Pump Service | 97-114 | Powermax Pump Maintenance, Tandem Unit Assembly, Priority Flow Dividers, Load Sensing Valves |
| Hatz Diesel Engine Repair | 115-263 | Technical Data and Type Plate, Engine Illustrations, Fuel Supply System, Airfilter and Exhaust Systems, Electrical Equipment and Engine Monitoring, Mechanical and Hydraulic Power Take-Off, Cross-Reference Lists, Cylinders and Pistons, Crankcase and Flywheel-Side Components, Test and Adjustment Work (Bumping and Tappet Clearance, Start of Injection, Injected-Fuel Quantity, Engine Speed), Governor and Injection Equipment, Special Tools and Sealants |
| Wiring Diagrams | 264-272 | Electrical Wiring Diagram, Relays, Alternator, Starter, Component Legend |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Valve clearance (inlet) | 0.1 mm | p. 20 |
| Valve clearance (outlet) | 0.1 mm | p. 20 |
| High pressure nominal value | 250 bar | p. 39 |
| Engine speed nominal value | 2800 rpm | p. 45 |
| Current consumption | 3A at 12V | p. 267 |
| Engine Rated Power (DIN ISO 9249) | 13.9 kW | p. 20 |
| Engine Rated Speed | 2800 min-1 | p. 20 |
| Travel Pump High Pressure Limitation | 250 bar | p. 20 |
| Vibration Pump High Pressure Limitation | 200 bar | p. 21 |
| Vibration Frequency | 32 Hz | p. 21 |
| Injection Pressure (static) | 250 bar | p. 120 |
| Tappet Clearance (inlet/outlet) | 0.10 mm | p. 120 |
