The vibration system is where these rollers get misread: exciter frequency, throttle positions, and the sprinkler keeping asphalt off the drum, all explained in this 86-page Bomag BW 138 AD operator manual PDF (OEM 008 138 01), which serves four models in the BW tandem and combination roller family. Maintenance fills a third of the pages, with intervals for greasing the articulated joint, changing hydraulic oil and filters, adjusting the scrapers, and a fuels and lubricants table telling you what goes in each fill point. Engine troubleshooting and a walkthrough of the indicators and controls round out the operating chapters, from jump-wire starts to towing and folding the ROPS. Set throttle position I on a 138 and the tach reads 2500 rpm, with the exciter at 55 Hz under full load. Alone on the mat, there's no one to ask. Bookmarked and text-searchable, the PDF puts the right lubricant grade in front of you before you order.
What's Inside This Bomag BW 125 ADH, BW 135 AD, BW 138 AD, BW 138 AC Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Technical Data | 7-14 | Travel Characteristics, Drive System, Brakes, Steering, Vibration System, Water Sprinkler System |
| Safety Regulations | 15-22 | General Notes, Loading the Machine, Driving the Machine |
| Indicators and Controls | 23-34 | Description of Indicators and Control Elements |
| Operation | 35-50 | Inspections Before Starting Operation, Starting the Engine, Starting with Jump Wires, Driving the Machine, Stopping the Machine / Applying the Brake |
| Maintenance | 51-80 | Fuels and Lubricants, Table of Fuels and Lubricants, Running-In Instructions, Maintenance Chart, Check the Engine Oil Level, Checking the Dry Air Filter |
| Trouble Shooting | 81-86 | General Notes, Engine Problems |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Throttle lever Position I (BW125ADH and BW135AD) | 2200 rpm | p. 30 |
| Throttle lever Position I (BW138 AD/AC) | 2500 rpm | p. 30 |
| Battery voltage | 12 Volt | p. 39 |
| Vibration frequency at full load position I | 55 Hz | p. 42 |
| Vibration frequency at full load position II | 66 Hz | p. 42 |
| Sprinkling interval B-F | 32, 24, 16, 8 and 4 seconds | p. 44 |
| Sprinkling time | 5 seconds | p. 44 |
| Hydraulic oil capacity | 30 litres | p. 55 |
| Acid level (without control inserts) | 10 to 15 mm above the upper edge of the lead plates | p. 65 |
| Engine Oil Capacity | 6.0 litres | p. 55 |
| Fuel Tank Capacity | 55 litres | p. 55 |
| Hydraulic System Oil Capacity | 30 litres | p. 55 |
Bomag BW 125 ADH, BW 135 AD, BW 138 AD, BW 138 AC Common Problems This Manual Covers
Bomag BW 125 ADH engine won't start or dies after a few seconds of running
Check the fuel level before anything else; the tank holds 55 litres and running it dry means bleeding the system. Work through the engine troubleshooting chart starting on page 83, then pull the dipstick and verify the oil level, since capacity is 6.0 litres and a low reading is one of the first things to rule out.
Manual Section: Trouble Shooting p. 83Charge control lamp stays lit on the dash after the engine comes up to speed
Inspect the V-belt for glazing and slack, since a slipping belt stops the alternator from charging. Then check the battery per page 65: electrolyte should sit 10 to 15 mm above the upper edge of the lead plates, with terminals clean and greased. If the lamp still burns at speed, shut down and have the alternator tested.
Manual Section: Maintenance p. 65Vibration will not switch on or the drum barely shakes at full throttle
Verify the throttle lever sits in the full-load position before switching vibration on; in position I the system should run at 55 Hz, listed on page 42. Check the hydraulic oil level next, since the system holds 30 litres and a low tank starves the vibration circuit. Anything deeper inside the pump is a service shop job.
Manual Section: Operation p. 42Drum water spray weak or stops spraying, asphalt picking up on the drum
Fill the water tank first; it holds 230 litres and empties fast on a hot mat. Set the interval switch per page 44: positions B through F spray for 5 seconds every 32, 24, 16, 8 or 4 seconds. Clean any clogged nozzles, then run a pass to confirm even wetting across both drums before rejoining the train.
Manual Section: Operation p. 44Engine cranks slowly in cold weather and takes several attempts to fire
Check the battery first: this is a 12 Volt system, shown on page 39, and a weak battery in frost will not spin the diesel fast enough. Confirm the engine oil viscosity matches the season in the fuels and lubricants table on page 55. Never spray ether or starting fluid into the intake.
Manual Section: Operation p. 39Frequently Asked Questions
How do I reset the dry air filter service indicator?
To reset the dry air filter service indicator, press the reset button (2) on the vacuum gauge. The red indicator will disappear. p. 59
What are the valve clearance specifications for the engine?
The valve clearance for the engine 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. 68
What is the correct tire pressure for the BW 138 AC?
The nominal tire pressure for the BW 138 AC is 2.2 bar (32 psi). Ensure that all tires have equal pressure. p. 77
What is the engine oil capacity for the machine?
The engine oil capacity is approximately 6.0 litres (1.6 USgal). Always observe the level marks on the dipstick. p. 55
How often should the toothed belt be replaced?
The toothed belt must be replaced at the latest after 5 years, even if the operating hours have not yet been reached. p. 76
What exactly do I receive with this Bomag BW 125 ADH Operator Manual?
Straight to your device: 86 pages of searchable Operator Manual, downloadable the moment payment goes through.
Is this Bomag BW 125 ADH manual print-friendly?
Print away. There is no DRM and no page limit. Many buyers print one chapter at a time and leave the rest on a tablet.
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