Bomag BW 120 AC-4 Roller Pdf Repair Service Manual 00891052

Complete Workshop Service Manual for Bomag BW 120 AC-4 Combination Rollers

The Bomag BW 120 AC-4 Repair & Service Manual (P/N: 00891052) is the definitive factory-level technical publication for maintaining, diagnosing, and overhauling this Dash-4 series combination roller. Featuring a 1200mm vibratory steel drum at the front and four pneumatic tires at the rear, the AC-4 model requires specialized technical data to manage its dual-surface compaction systems. This manual provides the precise OEM-approved procedures required to keep the machine operating at peak industrial performance.

Powered by a reliable liquid-cooled diesel engine, the BW 120 AC-4 relies on accurate hydraulic calibration and electronic diagnostics. This manual delivers detailed service instructions for the series-parallel hydrostatic drive system, vibration circuits, and the specialized rear-wheel traction assembly unique to the combination series.

This manual is an essential resource for field technicians, independent repair shops, and fleet maintenance teams working on Dash-4 Bomag combination rollers in real-world jobsite conditions.

Technical Specifications & Maintenance Data

• Engine Service: Step-by-step engine service procedures, including valve clearance adjustments, fuel injection timing, cooling system inspection, and glow plug circuit testing.
• Hydraulic Systems: Accurate pressure settings and calibration procedures for hydrostatic travel motors and pump swashplate adjustment.
• Fluid Capacities & Specifications: Correct engine oil viscosity, hydraulic oil grades, and cooling system capacity data.
• Torque Values: Factory torque specifications for rubber buffer mounts, articulation pins, wheel lug nuts, and critical fasteners.

Systems & Service Coverage

• Vibration System: Complete disassembly and reassembly procedures for the front drum exciter shafts, bearing replacement, and vibration frequency testing.
• Rear Tire Drive: Service instructions for the pneumatic tire axle, including hydraulic motor maintenance and tire scraper adjustments.
• Hydrostatic Drive: Diagnostic workflows for loss of drive power, travel motor rebuilding, and hydraulic system flushing after contamination.
• Electrical System: High-resolution wiring diagrams covering Dash-4 electrical logic, switches, sensors, fuses, and dashboard components.
• Dual Water Spray System: Service instructions for the pressurized sprinkler system serving both the drum and tires, including pump repair and nozzle cleaning.
• Steering & Articulation: Procedures for resealing steering cylinders, inspecting articulation joints, and servicing pivot bearings.
• Brake System: Testing and servicing of SAHR parking brakes, emergency stop circuits, and brake release systems.

Manual Specifications

• Machine Model: Bomag BW 120 AC-4 (Combination Roller)
• Part Number: 00891052
• Generation: Dash-4 Series
• Format: PDF Digital Download (fully searchable and bookmarked)
• Language: English
• Total Pages: 720+
• File Size: Approximately 110 MB
• Illustrations: Hydraulic flow diagrams, wiring diagrams, and exploded assembly views
• Compatibility: Windows, macOS, Android, iOS, and tablets

Why This Service Manual Is Essential for Repairs

• Accurate Troubleshooting: Quickly identify causes of vibration engagement failures, steering delays, and hydraulic pressure loss.
• Reduced Downtime: Perform in-house diagnostics and repairs without relying on expensive dealer service calls.
• Safety Compliance: Verify correct operation of seat safety switches, emergency braking systems, and operator safety circuits.
• Instant Access: Digital PDF format allows fast keyword searching for terms such as fault codes, wiring, or fuse locations.

Why Buy from Manualskart.com

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Frequently Asked Questions

Does this manual cover the pneumatic tires?

Yes, this is a "Combination" manual, so it includes full service and repair data for the rear pneumatic tire drive system.

Are wiring diagrams included?

Yes, the manual contains clear, high-resolution wiring diagrams that allow accurate tracing of electrical circuits and fault diagnosis.

Can I use this on my phone or tablet?

Absolutely. The PDF format is universally compatible with all mobile devices and computers for easy reference on the job site.

How will I receive the manual?

You will receive an instant download link immediately after purchase, allowing you to save the PDF to your device.