Charge pressure on the travel circuit, servo control adjustment, exciter drive inside the drum: the Bomag BW 177 D-4 Service Training PDF (OEM 008 099 90, 113 pages) settles those questions with factory figures for this single drum roller. Hydraulic schematics trace the closed-loop travel pump through the axle and drum drive motors, while wiring diagrams close out the book, down to the seat contact circuitry behind the interlock. Troubleshooting tables for travel, vibration and steering match each symptom to a pressure check you can run at the ports, and the Deutz diesel section covers the fuel system through the plug-in injection pump. Set inlet valve clearance to 0.3 mm, outlet to 0.5 mm, and pull the injection pump nuts to 21 Nm. A roller parked mid-lift burns the whole crew's daylight. Bookmarked and text-indexed, this PDF puts your section two taps away, right after download.
What's Inside This Bomag BW 177 D-4 Manual
| System | Pages | Key Topics |
|---|---|---|
| List of Components | 8-10 | Technical Data |
| Maintenance | 11-14 | Maintenance Table |
| Deutz Diesel Engine | 15-32 | Service Side, Starter Side, Lubrication Oil Circuit, Fuel System, Checking and Adjusting the Valve Clearance, Plug-In Injection Pump |
| Travel System | 33-62 | Travel Pump, Servo Control, Charge Pressure Relief Valve, High Pressure Relief Valve, Pressure Override, Axle Drive Motor, Drum Drive Motor, Trouble Shooting Travel System |
| Vibration | 63-79 | Vibration Pump, High Pressure Protection, Control, Charge Pump, Vibration Motor, Drum, Trouble Shooting Vibration |
| Steering | 80-89 | Steering Pump, Steering Valve, Articulated Joint, Trouble Shooting Steering |
| Electrical System | 90-113 | Inspection of Seat Contact Circuitry, Wiring Diagrams, Electrical Component Listing |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Tightening torque for injection pump nuts | 21 Nm | p. 27 |
| Injection Pump Plug Tightening Torque | 18 Nm | p. 29 |
| Engine Power | 54 kW | p. 9 |
| Inlet Valve Clearance | 0.3 mm | p. 9 |
| Outlet Valve Clearance | 0.5 mm | p. 9 |
| Engine Oil Capacity | 13.5 l | p. 10 |
| Hydraulic Oil Capacity | 60 l | p. 10 |
| Steering Pressure | 200 +/-10 bar | p. 55 |
| Charge Pressure | 25 +/-1 bar | p. 55 |
| Brake Release Pressure | 25 bar | p. 59 |
Bomag BW 177 D-4 Common Problems This Manual Covers
Bomag BW 177 D-4 engine won't start or cranks slowly in cold weather after sitting overnight
Check the battery pole clamps and cables first; green corrosion under a clamp mimics a dead starter. Replace the fuel filter and bleed the fuel system before condemning the starter itself. If it still starts hard when cold, check valve clearance against the spec table on page 9: intake 0.3 mm, exhaust 0.5 mm.
Manual Section: Deutz Diesel Engine p. 15Machine will not move in either direction, engine runs fine and travel lever does nothing
Test charge pressure before pulling anything apart; the closed-loop travel pump needs 25 bar, plus or minus 1 bar, to stroke, and the drive brakes release at 25 bar (page 59). No charge pressure means no travel and locked brakes at the same time. Work through the travel troubleshooting chart on page 62 in order.
Manual Section: Travel System p. 62No vibration on the drum or only one amplitude works, front vibration will not switch off
Check hydraulic oil level first; the tank holds 60 l (page 10) and a low level starves the charge pump feeding the vibration circuit. Verify the vibration switch and amplitude selector before touching the exciter, then work through the vibration troubleshooting steps from page 63 onward. That gets you back in the pass without swapping the vibration motor blind.
Manual Section: Vibration p. 63Steering wheel turns hard and drum responds slowly, worse at low engine speed
Test steering pressure with the wheel held against a stop; the spec is 200 bar, plus or minus 10 bar, listed on page 55. A low reading points at the steering pump or relief valve, not the steering valve itself. Grease and inspect the articulated joint too; a dry joint drags the front frame and reads like a steering fault.
Manual Section: Steering p. 80Frequently Asked Questions
What are the replacement specifications for the fuel filter?
The fuel filter cartridge should be replaced every 1000 operating hours as specified in the maintenance table on page 13. When changing filters, use only the original filters specified in the operating and maintenance instructions to avoid severe damage to engine or hydraulic components. p. 13
What are the replacement specifications for battery cables or pole clamps?
Battery service, which includes applying pole grease, is required every 500 operating hours, per the maintenance table on page 12. This ensures proper electrical connection and prevents corrosion on the battery terminals. p. 12
What is the correct valve clearance for the Deutz diesel engine?
On a cold engine (engine oil temperature <80°C), the intake valve clearance should be 0.3 mm and the exhaust valve clearance should be 0.5 mm. If the cylinder head gasket has been replaced, these values increase to 0.4 mm for the intake and 0.6 mm for the exhaust. p. 20
What is the tightening torque for the injection pump nuts?
When assembling the injection pump, press it centrically against the stop and tighten the nuts to a torque of 21 Nm. p. 27
What is the engine oil capacity for the BW 177 D-4?
The engine oil filling capacity for the BW 177 D-4 is 13.5 liters, using SAE 15W-40 oil with an API SJ/CF specification. p. 10
What format is this Bomag BW 177 D-4 manual in?
A 113-page Service Manual in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Can I print this Bomag BW 177 D-4 manual?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Reviews
There are no reviews yet.