Where the travel circuit ends and the vibration circuit begins on these machines is a question only the factory book settles, and this 56-page Bomag BMP 851, BW 85 T service manual PDF (OEM 008 099 37) is that book, covering the multi purpose compactor from diesel engine to central exciter. Electrical schematics take up the largest share of the pages, tracing power supply, starting, monitoring, brake and travel speed range selection circuits wire by wire. Hydraulic diagrams map the closed-loop travel pump to its motors and the vibration pump through the speed range selector valve out to the exciter. Set valve clearance to 0.1 mm on the diesel, then check your vibration solenoids Y22 and Y71 against their 2.6 A rating. Every hour spent probing connectors blind is an hour the trench sits uncompacted. Print the pages you need; they can take grease on the bench.
Complete the set for your BMP 851, BW 85 T
Other edition of this manual
What's Inside This Manual
| System | Pages | Key Topics |
|---|
| Documentation | 4 | Index of Related Bomag Publications (Each Sold Separately) |
| General | 5-6 | Middle Traverse, Travel Motors, Hydraulic Oil Tank, Central Exciter, Reversing Protection System |
| List of Components | 7-8 | Engine, Travel Pump, Travel Motor, Vibration Pump, Vibration Motor, Control Valve Block |
| Maintenance | 9-12 | Maintenance Table |
| Diesel Engine | 13-18 | Valve Clearance, Checking and Adjusting the Gap Measurement |
| Travel System | 19-26 | Travel Pump, Travel Motor, Control Valve Block |
| Vibration | 27-32 | Vibration Pump, Speed Range Selector Valve, Vibration Control Valve, Vibration Motor, Central Exciter |
| Electrical Equipment | 33-42 | Power Supply, Speed Adjustment, Starting, Monitoring, Brake, Travel Speed Range Selection |
| Wiring Diagrams | 43-55 | Electrical Circuit Diagrams, Electrical Component List, Solenoid Valve (Y22, Y71) Ratings |
| Hydraulic Diagram | 56 | Hydraulic Circuit Diagram |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Inlet and outlet valves clearance | 0.1 mm | p. 7 |
| Solenoid valve, vibration (Y22, Y71) | 2.6A | p. 54 |
| Rated power DIN 6271 | 13.9 kW | p. 7 |
| Rated speed | 2800 min-1 | p. 7 |
| Valve clearance (inlet) | 0.1 mm | p. 7 |
| Valve clearance (outlet) | 0.1 mm | p. 7 |
| Gap measurement | 0.6 - 0.65 mm | p. 7 |
| Engine oil quantity | 1.3 l | p. 7 |
| Travel pump high pressure limitation | 250 bar | p. 7 |
| Vibration pump high pressure limitation | 200 bar | p. 8 |
| Engine oil filling capacity | 2.5 l | p. 8 |
| Hydraulic oil filling capacity | 38 l | p. 8 |
