Rebuilding an A10VG travel pump is the hardest job in this book, and this Bomag BW 120 AD-3 repair manual PDF (OEM 008 193 71) walks it bolt by bolt across 220 pages covering four BW-3 machines, tandem vibratory and combination rollers both. Hydraulic schematics trace the travel, vibration and steering circuits, and the flushing section carries you from schematic through filter installation to a fully bled system. Troubleshooting diagrams take up a solid stretch of the middle, working drive power, steering and vibration faults down to a cause, while drum, vibrator shaft, articulated joint and MK04 motor repairs fill the back half. Verify charge pressure between 18 and 26 bar, and hold the travel pump at 390 to 440 bar before condemning either pump. A roller that quits vibrating mid-lift stalls the whole crew. Bookmarked and text-layered, the PDF is yours right after checkout, and the machine back in the pass soon after.
Complete the set for your BW 100 AD-3, BW 120 AD-3, BW 100 AC-3…
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What's Inside This Repair Manual
| System | Pages | Key Topics |
|---|
| Safety Regulations | 7-10 | General Safety, Hydraulic System Safety |
| General Notes on Repair | 11-12 | General Repair Procedures, Electrical System Repair |
| Tightening Torques | 13 | Metric Unified Threads |
| Travel Pump Connection Overview | 14-16 | Travel Pump Ports, Pressure Test Ports, Flushing Valve, Charge Pressure Relief Valve |
| Tests and Adjustments | 17-36 | Rotary Speed Checks, Travel Circuit Pressure Tests, Vibration Circuit Pressure Tests, Neutral Position Adjustment, Steering Circuit Pressure Tests |
| Flushing Procedures | 37-58 | Flushing Schematics, Travel Circuit Flushing, Vibration Circuit Flushing, Filter Installation, Bleeding Procedures |
| Trouble Shooting | 59-84 | Trouble Shooting Diagrams, Hydraulic System Faults, Steering Function Issues, Drive Power Issues, Vibration System Faults |
| Drum Repair | 85-104 | Drum Removal, Drum Installation, Vibration Motor Disassembly, Vibrator Shaft Disassembly, Bearing Cover Disassembly |
| Oscillating Articulated Joint Repair | 105-120 | Joint Removal, Joint Installation, Joint Disassembly, Joint Assembly, Tapered Roller Bearing Adjustment |
| Hydraulic Pump Repair (A10VG) | 121-168 | Pump Sectional View, Drive Shaft Sealing, Boost Pump Sealing, Control Unit Removal, Pump Disassembly, Tightening Torques |
| Hydraulic Motor Repair (MK04) | 169-220 | Motor Identification, Motor Replacement, Mechanical Brake Release, Sealing Ring Replacement, Brake Disc Replacement, Sensor Replacement |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Charge pressure | 18 ... 26 bar | p. 45 |
| Steering/charge pump nominal pressure | approx. 200 bar | p. 69 |
| Travel pump nominal pressure | 390 ... 440 bar | p. 72 |
| Control chamber pressure nominal value | approx. 15 bar | p. 71 |
| Vibration motor leakage rate nominal value | max. 0.5 l/min | p. 21 |
| Fuel tank capacity | 35L | p. 22 |
| Hydraulic oil tank capacity | 28L | p. 22 |
| Water tank capacity | 180L | p. 22 |
| Engine idle speed | 975 rpm | p. 21 |
| Engine high idle speed | 3010 rpm | p. 21 |
| Travel pump displacement | 28 cm3 | p. 21 |
| Vibration pump displacement | 11 cm3/rev | p. 21 |
