The paving train is standing still because your tandem vibratory roller won't move, and the only way to beat the clock is with this 906-page Bomag BW 161 AC-50, BW 161 AD-50, BW 161 ADO-50 service manual pdf (OEM 008 401 94 EN). Massive troubleshooting sections break down every fault from CAN bus errors to axial piston pump failures. Detailed hydraulic schematics and circuit diagrams map out the entire closed-loop travel and vibration systems, guiding you straight to the faulty valve or exciter motor. Factory specifications eliminate the guesswork, giving you precise values like the 400-1200mA draw for the forward travel direction solenoid valve and the 15 Nm tightening torque for M12 x 1.5 hydraulic fittings. Guessing at travel pump pressures just leads to a ruined drive motor and a second teardown. This searchable PDF traces the issue, fixes the drum drive, and gets your machine back in the pass.
What's Inside This Bomag BW 161 AC-50, BW 161 AD-50, BW 161 ADO-50 Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 9-60 | Introduction |
| Fuels and Lubricants | 61-70 | Engine Oil, Fuel, Coolant, Hydraulic Oil, Gear Oil |
| Technical Data | 71-84 | Bw 161 Ad-50, Bw 161 Ado-50, Bw 161 AC-50, Additional Technical Data, Terms and Basis of Calculation |
| Electric Systems | 105-194 | Overview of Electric System, Table of Fuels and Lubricants, Wiring, CAN Bus Overview, Power Board, Control Console Cabin |
| Diesel Engine | 195-254 | Overview of Diesel Engine, Service Side, Starter Side, Lubrication Oil Circuit, Coolant Circuit, Replacing the Thermostat, Fuel Supply, Injection System |
| Hydraulic System | 255-380 | Overview of Hydraulics (Pump Overview), Open and Closed Hydraulic Circuit |
| Water Spraying System | 381-394 | Overview of Water Spraying System (Tandem Rollers, Combination Rollers, Pump Overview), Maintenance Work (Maintenance Table, Checks Prior to Start Up, As Required) |
| Air Conditioning | 395-430 | Overview of Air Conditioning System, Physical Principles, Refrigerant R134a, Compressor Oil / Refrigeration Oil, Working Principle of the Air Conditioning System |
| Drum | 431-534 | Ad Drum (Overview, Ad Drum, Ad/Ap Removing, Assembling the Exciter Unit) |
| Cabin Assembly | 535-552 | Safety, Preparations, Programming, Function Tests |
| Troubleshooting | 553-736 | Preliminary Remarks, Emergency Procedures (Actuating the Emergency Stop Switch, Disconnecting the Battery, Towing the Machine) |
| Disposal | 737-738 | Final Shut-Down, Machine Disposal, Environmental Regulations |
| Special Tools | 739-748 | Electric Tools, Hydraulic System Tools, ADO Drum Tools, List of Special Tools |
| Index | 749-762 | Alphabetical Index, Operating Equipment, Fault Codes |
| Appendix | 763-764 | Appendix Overview |
| A Circuit Diagrams | 765-906 | Water Spraying Diagram, Hydraulic Diagrams, Circuit Diagrams, Wiring Illustrations |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Tightening torque for hydraulic fitting M12 x 1.5 (series L) | 15 Nm | p. 52 |
| Brake solenoid valve | 1.8A | p. 121 |
| Solenoid valve, travel direction forward | 400..1200mA | p. 121 |
| Tightening torque for Telemecanique switch screw | 0.6 Nm | p. 179 |
| Tightening torque for outlet socket | 30 Nm | p. 205 |
| Pressure retaining valve | 5 bar | p. 206 |
| Engine Oil Capacity | 10 L | p. 68 |
| Fuel Tank Capacity | 145 L | p. 68 |
| Coolant Capacity | 18 L | p. 68 |
| Hydraulic Oil Capacity | 80 L | p. 68 |
| Water Spraying System Capacity | 750 L | p. 68 |
| Refrigerant R134a Capacity | 1300 g | p. 68 |
Bomag BW 161 AC-50, BW 161 AD-50, BW 161 ADO-50 Common Problems This Manual Covers
Bomag BW 161 AC-50 throws fault code 1100 and output brake valve fails to energize.
Test the brake solenoid circuit for an open line or ground fault. Verify the nominal voltage for valve operation reaches 12 V as detailed on page 625. If brake releasing pressure is too low, inspect the harness connectors and replace the faulty valve coil.
Manual Section: Troubleshooting p. 625Travel pump closed-loop drive motor stalls on asphalt mat and triggers fault code 1001.
Check the travel direction solenoid valves for line breakage. Measure the current draw to confirm it operates within the 400.1200mA range specified on page 121. Inspect the hydraulic oil level and ensure it sits approx. 3 cm (1.2 in) below the top edge of the inspection glass.
Manual Section: Electric Systems p. 121Diesel engine shuts down intermittently during compaction passes and refuses to restart on the trench.
Inspect the fuel shut-off solenoid circuit for a short to ground. Verify the engine oil capacity is at 10 L using the dipstick. Check the injection valves opening pressure on page 81 to ensure it hits 220 bar. Clean all harness contacts before restarting the machine.
Manual Section: Diesel Engine p. 81Hydraulic oil leaks around the pressure retaining valve after heavy vibration over a landfill cell.
Replace the primary hydraulic oil filter if the machine exceeds the 1000 operating hours interval found on page 375. Inspect the pressure retaining valve and verify it holds 5 bar. Torque any leaking M12 x 1.5 hydraulic fittings to 15 Nm as outlined on page 52.
Manual Section: Hydraulic System p. 375Frequently Asked Questions
How do I reset a fault code on the BOMAG BW 161 AD-50?
To delete all stored faults, ensure the engine is not running, enter code number 0710 (without service code 9999), and then switch the ignition off and on again. p. 614
What is the torque specification for the M16 screws on the BW 161 AD-50?
For a screw dimension of M16 with a strength class of 8.8, the tightening torque is 211 Nm. For strength class 10.9, it is 300 Nm, and for 12.9, it is 358 Nm. p. 48
What is the procedure for replacing the breather filter on the hydraulic oil tank?
The breather filter is integrated into the tank cap. When replacing the hydraulic oil, you must replace the complete cap. p. 379
What is the valve clearance specification for the Bomag BW 161 AC-50, BW 161 AD-50, BW 161 ADO-50 diesel engine?
The valve clearance for the intake valve is 0.3 mm (0.012 in), and for the exhaust valve, it is 0.5 mm (0.020 in). p. 242
What is the oil capacity for the exciter housing on the AD drum of the Bomag BW 161 AC-50, BW 161 AD-50, BW 161 ADO-50?
The filling quantity for the exciter housing on the AD drum is 3.6 liters (1 gal us) per drum. p. 68
Is this Bomag BW 161 AC-50 Service Manual a digital download?
Immediate download of the complete 906-page searchable Service Manual. Access it on any device, from a laptop at your desk to a phone in the field.
Is this Bomag BW 161 AC-50 Service Manual printable?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
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