When a tandem roller goes down, the 756-page Bomag bw 174 ap, bw 174 acp service manual pdf (OEM 008 915 08) provides the exact factory repair procedures that no other guide can match. Factory hydraulic schematics map the complete flow from the travel pump to the closed-loop drum drive motors. The electronic controls section breaks down CAN-Bus signals and BEM Evib-meter diagnostics, while full wiring diagrams cover the machine's complete electrical circuits. You will find precise assembly specifications directly from the manufacturer, like the 13.6 - 20.3 Nm tightening torque for 5/8" O-ring sealed fittings. A dead machine means the whole paving train waits and the asphalt cools before it passes density. Download this bookmarked digital reference, print the flushing schematics you need, and take them right to the drum where they can get covered in grease while you clear the fault.
What's Inside This Bomag BW 174 AP, BW 174 ACP Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 7-28 | Introduction, Safety Regulations, General Repair Instructions |
| Technical Data | 29-36 | Weights, Dimensions, Travel Characteristics, Drive System, Vibration System, Steering System |
| Maintenance | 37-44 | Fuels and Lubricants, Table of Fuels and Lubricants, Running-In Instructions, Maintenance Chart |
| Connection Overview | 45-48 | Vibration Pump, Travel Motors, Vibration Shut-Off Valve, Travel Pump, Steering Valve, Distributor Block |
| Tests and Adjustments | 49-82 | Special Tools, Activate Service Mode, Driving Against the Closed Brake, Turn the Steering Against an End Stop, Checking the Rotation Speeds, Pressure Tests in the Travel Circuit |
| Flushing and Bleeding | 83-108 | Special Tools for Flushing, Flushing - General, Flushing Schematic for Travel System, Flashing the Travel Circuit, Flushing Schematic for Vibration Drive on AP-machines |
| Trouble Shooting | 109-130 | General Trouble Shooting, Trouble Shooting Diagram |
| Fundamental Electrics | 131-192 | Understanding Circuit Diagrams, Terminal Designations in Wiring Diagram, Circuit Symbols in the Circuit Diagram, Battery Ground and Analog Ground, Current and Voltage, CAN-Bus |
| Special Tools, Electrics | 193-202 | Special Tools Electrics |
| Electronic Controls | 203-342 | Machine, Bem, Bomag Evib-Meter |
| Air Conditioning System | 343-384 | Physical Basics, Refrigerant R134a, Compressor Oil / Refrigeration Oil, Working Principle of the Air Conditioning System, Monitoring Devices, Components |
| Engine | 385-400 | Checking, Adjusting the Valve Clearance, Check the Engine Oil Level, Change Engine Oil and Oil Filter Cartridge, Changing the Fuel Filter Cartridges |
| Hydraulics | 401-404 | Check the Hydraulic Oil Level, Changing Hydraulic Oil and Breather Filter, Changing the Hydraulic Oil Filter |
| Replacing the Cab Window Panes | 405-414 | Assembly of Window Panes, Special Tools, Auxiliary Materials, Removing and Installing the Window Pane |
| Drum | 415-454 | Special Tools, Repair Overview AD-drum, Removing the AD-drum, Dismantling the AD-drum, Dismantling, Assembling the Ad Exciter Unit, Assembling the AD-drum, Installing the AD-drum |
| Pivot Steering | 455-466 | Repair Overview Oscillating Articulated Joint, Removing, Repairing and Installing the Pivot Steering, Repairing the Oscillation Joint |
| Vibration Valve Y54/Y55 | 467-470 | Vibration Control Valve Repair Overview |
| Suppliers Documentation | 471-702 | Travel Pump, Vibration Pump, Vibration Motor, Drum Drive, Wheel Drive |
| Circuit Diagrams | 703-756 | Hydraulic Diagram 870 203 09, Hydraulic Diagram 870 203 06, Wiring Diagram 870 100 24 |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| combustion air filter safety cartridge replacement interval | at least every 2 years | p. 44 |
| Yellow fuse rating | 5 A | p. 158 |
| Brown fuse rating | 7.5 A | p. 158 |
| Tightening torque for 5/8" O-ring sealed fitting | 13,6 - 20,3 Nm | p. 355 |
| Tightening torque for 3/4" O-ring sealed fitting | 32,5 - 39,3 Nm | p. 355 |
| Compressed air pressure for cleaning | max. 5 bar | p. 398 |
| Required quantity of corrosion protection VCI 329 for internal preservation | 10 ml | p. 539 |
| Engine Rated Power | 58 kW (78 PS) | p. 30 |
| Engine Rated Speed | 2600 rpm | p. 30 |
| Engine Oil Capacity | 8.0 L | p. 31 |
| BW 174 AP | ||
| Operating Weight (CECE) | 9760 kg | p. 30 |
| BW 174 ACP | ||
| Operating Weight (CECE) | 8900 kg | p. 32 |
Bomag BW 174 AP, BW 174 ACP Common Problems This Manual Covers
Bomag BW 174 AP and ACP engine cranks slowly or will not start on cold mornings.
Inspect the air intake system and battery connections before tearing into the fuel lines. If cleaning the air filter element, regulate your shop air to max. 5 bar to protect the media. Verify filter replacement intervals on page 44 require a new safety cartridge at least every 2 years.
Manual Section: Engine p. 44Roller drops amplitude mid-pass with weak or completely missing drum vibration output.
Test the electrical feed to the vibration control valves if the drum stops packing. Check the fuse ratings on page 731; several vibration-circuit fuses there read 5A. If the circuit holds, confirm the exciter motor is reaching its rated frequency, listed under Technical Data on page 31.
Manual Section: Technical Data p. 31Hydraulic travel circuit stalls under load or the machine will not propel properly.
Check the high-pressure relief valves on the travel pump if the roller refuses to move. Pull the suspect valve and inspect the seats. When reinstalling, apply a high-pressure valve torque of exactly 250 Nm as shown on page 496.
Manual Section: Suppliers Documentation p. 496Water spray system runs dry on the mat with clogged nozzles or ineffective drum coverage.
Drain the tank and inspect the inline water filter before the asphalt sticks to the drums. Inspect the electrical pump relays and check the fuse ratings on page 731 for the water-pump circuit; several read 10A. Clean all scraper bars and nozzles with shop air regulated below max. 5 bar.
Manual Section: Circuit Diagrams p. 731Frequently Asked Questions
How do I reset the fault codes on the BOMAG BW 174 AP?
To delete all stored faults on the ESX control, ensure the engine is not running, enter code number 0710 (without service code 9999), and then switch the ignition off and on again. This procedure is described in the fault log section of the manual. p. 226
What are the torque specs for M12 bolts with 10.9 strength class on the Bomag BW 174 AP, BW 174 ACP?
For screws with a metric unified thread and a 10.9 strength class, the tightening torque for an M12 bolt is 123 Nm. p. 25
What is the travel pump high pressure limitation setting on the Bomag BW 174 AP, BW 174 ACP?
The high pressure limitation for the travel pump is set to 445 ± 5 bar. p. 34
What is the service interval for changing the engine oil and oil filter cartridge on the Bomag BW 174 AP, BW 174 ACP?
The engine oil and oil filter cartridge should be changed every 250 operating hours. p. 43
What is the correct valve clearance for the Bomag BW 174 AP, BW 174 ACP engine?
The valve clearance for the intake valve is 0.35 mm and for the exhaust valve is 0.50 mm. p. 386
How will I receive this Bomag BW 174 AP Service Manual?
A single searchable PDF file of 756 pages, downloadable right after payment. Nothing ships, nothing waits in the mail.
Can I print this Bomag BW 174 AP manual?
Printing is allowed without restriction. Pull the pages you need for the job and bin them when they get greasy.
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