Charge pressure limits, vibration circuit test points, EMR fault reactions: the Bomag BW 177 service manual PDF (OEM 008 099 92, 201 pages) settles those questions for BW 177 and BW 179 single drum rollers, four variants across the DH-4 and PDH-4 lines. Hydraulic schematics trace the closed-loop travel pump through the drum drive and axle motors, with test and adjustment points marked for the travel, vibration and steering circuits. Wiring diagrams and signal descriptions for the electrics take up roughly the last third of the book, backed by troubleshooting tables for the Deutz engine with EMR. Set the cylinder head cover at 9 ±1 Nm and check your starter against its 50 A pull-in current rather than a figure somebody half remembered. A guessed relief pressure cooks a travel pump. Bookmarked and text-searchable, the PDF puts the circuit you're chasing two clicks away.
Complete the set for your BW 177, BW 179, BW 179 DH…
What's Inside This Bomag BW 177, BW 179, BW 179 DH, PDH-4 Manual
| System | Pages | Key Topics |
|---|
| Documentation | 5 | Index of Related Bomag Publications (Each Sold Separately) |
| General | 6-7 | Drive Concept, Hydrostatic Drives, Cabin, Monitoring Display, ROPS/FOPS, Articulated Joint |
| New Developments | 8-10 | Multi-Function Travel Lever, Display, Control, Operation, Data Collector |
| Technical Data and Adjustment Values | 11-14 | Engine, Travel Pump, Reduction Gear, Travel Motor, Vibration Pump, Steering and Charge Pump |
| Maintenance | 15-18 | Maintenance Chart |
| Deutz Diesel Engine with Emr | 19-67 | Service Side, Starter Side, Lubrication Oil Circuit, Coolant Circuit, Fuel System, Emr, Trouble Shooting, Diagnose Serdia |
| Travel System | 68-95 | Travel Pump, Control, Charge Pressure Relief Valve, High Pressure Relief Valve, Pressure Override, Axle Drive Motor, Drum Drive Motor, Test and Adjustment Points |
| Vibration | 96-111 | Vibration Pump, High Pressure Relief Valves, Control, Vibration Motor, Drum, Test and Adjustment Points, Vibration System, Trouble Shooting Vibration |
| Steering | 112-122 | Charge Pump, Steering Pump, Steering Valve, Articulated Joint, Measuring and Adjustment Points, Trouble Shooting Steering |
| Electrics | 123-201 | Fault Reactions, Description of Signals |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Toothed belts replacement | min. every 5 years | p. 17 |
| Cylinder head cover tightening torque | 9 +/- 1 Nm | p. 63 |
| Crankcase ventilation tightening torque | 9 +/- 1 Nm | p. 63 |
| Starter holding current | 10A | p. 170 |
| Starter pull-in current | 50A | p. 170 |
| Fuse, main, battery | 125A | p. 181 |
| Fuse, wipermotor rear | 15A | p. 181 |
| Fuse, wipermotor front | 15A | p. 181 |
| Engine Power (ISO 9249) | 74.9 kW | p. 12 |
| Inlet Valve Clearance | 0.3 mm | p. 12 |
| Outlet Valve Clearance | 0.5 mm | p. 12 |
| Hydraulic Oil Capacity | 60 L | p. 13 |
