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.
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 |
Bomag BW 177, BW 179, BW 179 DH, PDH-4 Common Problems This Manual Covers
Bomag BW 177 cranks but won't fire, or starter clicks and engine won't turn over
Check battery terminals for corrosion and load-test the battery first. Verify the 125 A main battery fuse and the 30 A starter switch fuse listed on page 181. If the solenoid clicks but the pinion never spins, test starter pull-in and holding current at the motor before replacing the starter.
Manual Section: Electrics p. 181Roller creeps or will not move at all, travel lever responds in one direction only
Check charge pressure first; it must hold 26 plus or minus 1 bar at the test point shown on page 75. Low charge pressure starves the travel pump control and mimics a dead pump. Then tee a gauge into the high pressure circuit and confirm the relief valves open at 430 plus or minus 5 bar per page 80.
Manual Section: Travel System p. 75No vibration in either amplitude, or vibration drops out mid-pass under load
Check hydraulic oil level before anything else; the tank holds 60 L and a low level aerates the vibration pump supply. Work through the vibration section starting on page 96: verify the vibration pump solenoid clicks when the lever switch is pressed, then test the control relay before condemning the exciter drive.
Manual Section: Vibration p. 96Steering heavy at idle and drum stops short of full lock in both directions
Tee a pressure gauge into the steering circuit and check the relief valve setting; it must read 175 bar as listed on page 112. Low pressure points to a worn charge pump or stuck relief cartridge, not the steering valve. Inspect the articulated joint bearings for seizure and grease them before adjusting anything hydraulic.
Manual Section: Steering p. 112Engine or hydraulic oil overheats after an hour of continuous vibratory compaction
Clean the radiator and hydraulic cooler cores with compressed air blown from the fan side out. Check coolant level; the system takes 15 L, and page 13 lists all fill capacities if you drain and refill. Verify engine oil sits at the full mark (8.5 L capacity), then check the fan drive for slip before blaming the thermostat.
Manual Section: Deutz Diesel Engine with Emr p. 13Frequently Asked Questions
How can I delete all stored error codes on the BOMAG BW 177 or BW 179?
To delete all stored faults, ensure the engine is not running, enter code number 0710, and then switch the ignition off and on again. This procedure is valid for software version 1.10 and later. p. 137
What is the torque specification for the injection pump screws on the BW 177 / 179?
When replacing the injection pump, the screws should be tightened in stages to 7 Nm, 10 Nm, and finally 30 Nm. p. 62
What are the valve clearance specifications for the Deutz engine on the BW 177 / 179?
The valve clearance must be checked and adjusted when the engine is cold. The intake valve clearance is 0.3 mm and the exhaust valve clearance is 0.5 mm. p. 45
What is the engine oil capacity and specification for the BW 177 / 179?
The engine oil capacity is 8.5 liters, and the required specification is SAE 15W-40, API SJ/CF. p. 13
What is the correct coolant capacity and mixture for the BW 177 / 179?
The engine cooling system requires 15 liters of coolant, consisting of a 50% water and 50% anti-freeze agent mixture based on Ethane-diol. p. 13
Will this Bomag BW 177 Service Manual download right away?
All 201 pages arrive as one searchable PDF at checkout. Read it at the desk, then take the phone out to the machine.
Am I free to print this Bomag BW 177 Service Manual?
Yes. No DRM, nothing blocks printing, so run off the pages you need on whatever printer you have.
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