Drott 120C Excavator Service Manual

• Covers Drott 120C Crawler Excavator
• P/N S406208M2
• 186 pages
• Downloadable PDF format
• 31mb file size
• Works with Windows/Mac/Tablet/Mobile

The Drott 120C Service Manual PDF includes over 180 pages of technical specifications, step-by-step instructions, illustrations and schematics to guide mechanics through mechanical, electrical and hydraulic repairs. The service manual was digitally reproduced from the original dealer manual into a clear, searchable PDF format and is ideal for mechanics repairing or overhauling the Drott 120C excavator. This manual can be downloaded instantly to your computer, tablet or smartphone.

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Topics:

GENERAL INFORMATION

• Torque Specs

SCHEDULED PREVENTIVE MAINTENANCE

• Lubricant and Fluid Recommendations
• Component Capacities
• Pressure Settings
• Maintenance Schedule
• Service Chart
• Pictorial Listing of Grease Fitting Locations

UNDERCARRIAGE

• Description, Maintenance and Troubleshooting
• Carbody and Turntable Bearing
• Track Assemblies
• Track Drive Assemblies
• Disassembly and Repair
• General Cleaning Instructions
• Upper Track Rollers
• Lower Track Rollers
• Idler Wheel Assembly
• Digging Brake
• Track Drive Transmission

UPPERSTRUCTURE

• Description, Maintenance and Troubleshooting
• Pump Drive System
• Swing System
• Boom Assembly
• Disassembly and Repair
• Pump Drive Transmission and Clutch
• House Brakes
• Swing Gearbox
• Turntable Bearing Replacement
• Boom Removal

ELECTRICAL SYSTEM

• Description, Maintenance and Troubleshooting
• The Charging System
• Control Circuits
• Lights and Instrument Circuits
• Disassembly and Repair
• Wiring Diagram

HYDRAULIC SYSTEM

• Description, Maintenance and Troubleshooting
• Hydraulic Schematic
• Introduction to Hydraulics
• General Description and System Maintenance
• Hydraulic Reservoir and Supercharge System
• Hydraulic System Flushing and Troubleshooting
• Main Hydraulic System
• Pilot Control System
• Auxiliary System
• Track Drive Circuit
• Tool Cylinder Circuit
• Swing Circuit
• Crowd Cylinder Circuit
• Hoist Cylinder Circuit (includes Fast Hoist Circuit)
• Pump Drive Clutch Circuit
• Counterweight System
• Disassembly and Repair
• Hydraulic Reservoir
• Main Pumps
• Main Control Valves
• Power Sensing Valve
• Hydraulic Filters (In-line)
• Charging Pump
• Modulator Valves
• Swing Cushion Valve
• Swing Motors
• Tool, Crowd and Hoist Cylinders
• Fast Hoist Control Valve
• Track Drive Motors
• Hydraulic Swivel
• Counterweight Control Valve
• Counterweight Cylinders
• Clutch Cylinder

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