John Deere 3120 3320 3520 3720 Diagnostic & Repair Technical Manual

Factory Diagnostic & Repair Technical Manual (TM2138) For John Deere 3120, 3320, 3520, 3720 Compact Utility Tractors. Detailed step by step illustrations, instructions, diagrams for Systems Diagnosis, System Theory of Operation, Performance Testing, Tests and Adjustments, Operational Check, Operation, Unit Locations and Identification, Diagnostic Codes, Schematics and repair procedures, troubleshooting, removal, disassembly, installation, machine specifications, tightening references, maintenance, inspection.

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Models

John Deere
3120
3320
3520
3720

Contents

Safety
—Safety
Specifications and Information
—General Specifications
—Fuel and Lubricants
—Serial Number Locations
Engine
—Specifications
—Component Location
—Theory of Operation
—Diagnostics
—Tests and Adjustments
—Repair
Electrical—NA
—General Information
—Specifications
—Component Location
—Schematics and Harnesses
—Schematics and Harnesses MY
—Schematics and Harnesses MY
—Common Schematics and Harnesses
—Operation and Diagnostics
—Tests and Adjustments
—Display Panel Tests and Adjustments
—SERVICEGARD™ Tests and Adjustments
—Service ADVISOR™ Test and Adjustments
—Repair
Electrical—EEC
—Specifications
—Component Location
—Schematics and Harnesses
—Schematics and Harnesses MY
—Schematics and Harnesses—MY
—Common Schematics and Harnesses
—Troubleshooting
—Operation and Diagnostics
Power Train—PRT
—Specifications
—Component Location
—Theory of Operation
—Diagnostics
—Troubleshooting
—Tests and Adjustments
—Repair
Power Train—Hydrostatic
—Specifications
—Component Location
—Schematics
—Theory of Operation
—Diagnostics
—Troubleshooting
—Tests and Adjustments
—Repair
Power Train—Final Drive
—Specifications
—Component Location
—Theory of Operation
—Diagnostics
—Troubleshooting
—Final Drive Troubleshooting
—Tests and Adjustments
—Repair
—PTO Theory of Operation
—PTO Repair
Hydraulics
—Specifications
—Component Location
—Schematics
—Theory of Operation
—Diagnostics
—Tests and Adjustments
—Repair
Steering
—Specifications
—Component Location
—Theory of Operation
—Diagnostics
—Tests and Adjustments
—Repair
Brakes
—Specifications
—Component Location
—Theory of Operation
—Diagnostics
—Tests and Adjustments
—Repair
Miscellaneous
—Specifications
—Repair