When the ESX control throws a fault code mid-mat, this 203-page Bomag BW 170 AD, BW 174 AD, BW 174 AC Service Training PDF (OEM 008 098 20) is where diagnosis starts: the electric training section that decodes those faults fills more of the book than any other system. Six tandem roller variants are covered, including the AM Asphalt Manager versions, from the Cummins 4B3.3 diesel through travel, vibration and steering hydraulics. Circuit diagrams cover the sprinkler system, crabwalk steering and Asphalt Manager wiring, while separate hydraulic schematics map each variant's closed-loop travel circuit, and test point drawings show where to tap charge pressure. Set inlet valve clearance to 0.35 mm; know the F00 fuse runs 250A before you blame the harness. Guess wrong on an ESX fault and you pay for a pump you didn't need. Bookmarked and text-searchable, this PDF lets you confirm the code against the component listing before anything goes on order.
What's Inside This Bomag BW 170–174 Series Manual
| System | Pages | Key Topics |
|---|---|---|
| Documentation | 3 | Index of Related Bomag Publications (Each Sold Separately) |
| General Information | 4-6 | Tandem Rollers, Variomatic II-drum, Bomag Asphalt Manager, Pivot Steering, Multi-Disc Brakes, Exciter Shafts |
| Technical Data and Adjustment Values | 7-20 | Bw 170 Ad, Bw 170 Ad Am, Bw 174 AC, Bw 174 AC Am, Bw 174 Ad, Bw 174 Ad Am |
| Maintenance | 21-23 | Maintenance Table |
| Cummins Diesel Engine | 24-33 | 4B3.3 Engine, Intake Manifold, Injection Pump, Cooling System, Lubrication Oil Circuit, Turbo Charger |
| Travel System | 34-64 | Brake Control, Travel Pump, Pump Control, Charge Pressure Relief Valve, High Pressure Relief Valves, Pressure Cut-Off, Flow Divider, Design and Function of MH4FA |
| Vibration System | 65-76 | Vibration Pump, High Pressure Relief Valves, Control, Vibration Motors, Vibration Shut-Off Valve, Flushing Valve, Trouble Shooting |
| Steering System | 77-82 | Function, Steering Pumps, Steering Valve Block |
| Test and Adjustment Points | 83-89 | Steering/Charge Pump, Coolant Temperature Switch, Diesel Engine Speed Sensor, Steering Solenoid Valve, Tandem Pump, Pressure Override |
| Water Module Specification | 90-91 | Sprinkler Module, Water Pumps, Pressure Sensors, Warning Light, Warning Buzzer, Level Sensors |
| Electric Training | 92-151 | Functions of ESX Control, Description of Fault Codes, Input Codes for ESX Control |
| Terminology | 152-155 | Short Circuit, Wire Breakage, Digital, Analogue, Closed Loop Control, Override Operation |
| Version History | 156 | Display Codes, Fault Description, Signal Description, Machine Type Adjustment |
| Circuit Diagrams | 157-179 | Circuit Diagram, Monitoring Unit, Travel System, Sprinkler System, Asphalt Manager, Cross-Bonding Box |
| Component Listing | 180-197 | Fuses, Relays, Sensors, Solenoid Valves, Electronic Control Units, Connectors |
| Hydraulic Diagrams | 198-203 | Bw 170 Ad, Bw 170 Ad Am, Bw 174 AC, Bw 174 AC Am, Bw 174 Ad, Bw 174 Ad Am |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Tightening torque for counter nut | 49 Nm | p. 32 |
| F00 Fuse rating | 250A | p. 178 |
| F01 Fuse rating | 40A | p. 178 |
| Engine Power (ISO 9249) | 58 kW | p. 7 |
| Valve Clearance (Inlet) | 0.35 mm | p. 7 |
| Valve Clearance (Outlet) | 0.5 mm | p. 7 |
| Engine Coolant Capacity | 14 L | p. 8 |
| Engine Oil Capacity | 8 L | p. 8 |
| Hydraulic Oil Capacity | 60 L | p. 8 |
| AC Refrigerant Capacity | 1700 g | p. 8 |
| High Pressure Relief Valve Setting | 445 +/- 5 bar | p. 48 |
| Pressure Cut-off Setting | 400 +/- 10 bar | p. 48 |
| Steering Pressure Relief Valve Setting | 175 bar | p. 79 |
Bomag BW 170–174 Series Common Problems This Manual Covers
Bomag BW 174 AD tandem roller won't travel in either direction, drum drive dead after brake release
Start at the ESX fault code list: the 001 to 004 range flags a brake output fault and 020 to 024 the travel lever, so test the lever micro-switches and connector before touching hydraulics. If the electrics test clean, gauge the travel circuit high pressure relief valves at 445 bar, plus or minus 5, per the settings on page 48.
Manual Section: Travel System p. 48Seat position fault comes back after every reset, machine locks out with operator on seat
Read the fault code description first and confirm the code sits in the 030 to 032 range, the input for the seat position proximity switch. Test the switch for continuity with an operator seated, then verify the controller supply fuses listed on page 181, including the 30A controller fuse F67. Replace the seat switch if the code returns with good fuses and wiring.
Manual Section: Electric TrainingNo vibration on either drum, console switch clicks but exciter shaft never starts up
The 15A vibration fuse F03 in the listing on page 181 is the two minute check, so do it before pulling any covers. If the fuse is good, work through the vibration system section starting on page 65: jack the machine up, run the exciter, and verify the vibration pump and shut-off valve are getting their solenoid signals. Swap the relay before condemning the pump.
Manual Section: Vibration System p. 65Diesel engine runs rough with loud valve clatter, down on power under load
Adjust valve clearance with the engine cold: set intake to 0.35 mm and exhaust to 0.5 mm as specified on page 7, following the procedure in the Cummins engine section. Torque each rocker counter nut to 49 Nm max per page 32, then recheck clearance; a nut that moved during tightening puts you right back where you started.
Manual Section: Cummins Diesel Engine p. 32Coolant level warning on the display with the tank apparently full
Confirm the actual coolant level before blaming the sensor and top the system up toward its 14 L capacity listed on page 8. If the warning stays on with a full tank, test the level sensor and its harness, and inspect the connector for corrosion before ordering parts.
Manual Section: Electric Training p. 8Frequently Asked Questions
How do I delete all stored fault codes on the ESX control?
To delete all stored fault codes, ensure the engine is not running. Enter code number 710 at the display module to clear the memory. p. 106
What is the procedure to reset the surge currents in the travel system?
With the engine not running, enter code number 665 to activate the reset function. Then, enter code number 666 to reset the surge currents to the minimum value of 350mA. Switch off the ignition to finalize the process. p. 104
What is the correct valve clearance for the BW 170/174 series diesel engine?
The valve clearance for a cold engine (engine oil temperature below 60°C) is 0.35 mm for the intake valve and 0.5 mm for the exhaust valve. p. 7
What is the engine oil capacity for the BW 170/174 series?
The engine oil capacity for the BW 170/174 series is 8 liters, using SAE 15W-40, API SJ/CF oil. p. 8
What is the tightening torque for the valve clearance counter nut?
When adjusting the valve clearance, the maximum tightening torque for the counter nut is 49 Nm. p. 32
Will this Bomag BW 170 AD Service Training download right away?
This is a 203-page searchable PDF ready for immediate download. Works on any device, so pull it up on your phone while you're under the hood. No shipping, no waiting.
Can I print specific sections of this Bomag BW 170 AD Service Training?
Yes, printing is unrestricted: a single page, a chapter, or the lot, on letter or A4.
Reviews
There are no reviews yet.