John Deere 6120 6220 6320 6420 6120L 6220L 6320L 6420L 6520L 2WD MFWD Tractor Diagnosis & Tests Service Manual PDF (TM4646) - MJODTM4646.zip

Full Diagnostic & Testing Service Manual, complete with electrical schematics, covering John Deere Tractor models 6120, 6220, 6320, 6420, 6120L, 6220L, 6320L, 6420L, and 6520L — packed with shop-level guidance so you can troubleshoot, upkeep, and repair these machines the way trained technicians do.

This Diagnosis & Tests technical manual for John Deere 2WD or MFWD Tractors 6120, 6220, 6320, 6420, 6120L, 6220L, 6320L, 6420L & 6520L contains:

* Numbered table of contents easy to use so that you can find the information you need fast.

* Detailed sub-steps expand on repair procedure information

* Numbered instructions guide you through every repair procedure step by step.

* Troubleshooting and electrical service procedures are combined with detailed wiring diagrams for ease of use.

* Notes, cautions and warnings throughout each chapter pinpoint critical information.

* Bold figure number help you quickly match illustrations with instructions.

* Detailed illustrations, drawings and photos guide you through every procedure.

* Enlarged inset helps you identify and examine parts in detail.

tm4646 - 6120 to 6420 Tractors Operation and Tests Technical Manual.pdf

tm4646 - 6120 to 6420 Tractors Operation and Tests Technical Manual.epub

Total Pages: 4,621 pages

File Format: PDF (PC/Mac/Android/Kindle/iPhone/iPad; bookmarked, ToC, Searchable, Printable)

Language: English

MAIN SECTIONS

Foreword

Version date

GENERAL INFORMATION

Safety Measures

General References

ENGINE

Operational Check-Out

Tests and Adjustments

FUEL, AIR INTAKE AND COOLING SYSTEMS

Tests and Adjustments

Operation

ELECTRICAL SYSTEM

Sub-System Diagnostics (Cab)

Sub-System Diagnostics (Open Operator's Station)

Component Tests

Functional Schematics (AutoPowr/IVT Transmission)

Functional Schematics (PowrQuad Plus, AutoQuad and AutoQuad Plus Transmissions)

Functional Schematics (Open Operator's Station)

Summary of Wiring Harnesses

Wiring Harnesses

Wiring Harnesses (Continued)

Wiring Harnesses from Serial Number 398656

Wiring Harnesses from Serial Number 398656 (Continued)

ELECTRONIC CONTROL UNITS

Operation and General Information on Diagnostics

Data BUS Systems, Theory of Operation

ATC - Automatic Temperature Control Unit

BCU - Basic Control Unit

BIF - Basic Informator

ECU - Engine Control Unit

EPC - Control Unit for PowrQuad Plus, AutoQuad and AutoQuad Plus Transmissions

JDL Control Unit for JDLink

PLC - Park Lock Controller

PRF - Performance Monitor

SFA - Control Unit for Front-Wheel Drive Axle and Cab Suspension

SIC - Control Unit for Electrically Actuated Selective Control Valves

SSU - Control Unit for AutoTrac

TCU - Control Unit for AutoPowr/IVT Transmission

TEC - Control Unit for Tractor Equipment Interface

UIC - User Interface Controller

UIM - User Interface Module, Keyboard for ISOBUS Display

SYNCROPLUS TRANSMISSION

Introductory Checks

Operational Check-Out

Tests and Adjustments

Operation

POWER REVERSER TRANSMISSION

Operational Check-Out

Tests and Adjustments

Operation

AUTOPOWR/IVT TRANSMISSION

Operational Check-Out

Tests and Adjustments

Operation

POWRQUAD, POWRQUAD PLUS, AUTOQUAD AND AUTOQUAD PLUS TRANSMISSIONS

Operational Check-Out

Tests and Adjustments

Operation

DRIVE SYSTEMS

Operational Check-Out

Tests and Adjustments

Operation

STEERING AND BRAKES

Introductory Checks

Operational Check-Out

Tests and Adjustments

Operation

HYDRAULIC SYSTEM

Operational Check-Out

Tests and Adjustments

Operation

MISCELLANEOUS

Operational Check-Out

Tests and Adjustments

Operation

OPERATOR'S CAB

Operational Check-Out

Tests and Adjustments

Operation

SPECIAL TOOLS

Special Tools (Dealer-Fabricated)

Special Tools and Test Equipment

tm4646 - 6120 to 6420 Tractors Operation and Tests

Table of Contents

Foreword

Version date

Section 210: GENERAL INFORMATION

Group 05: Safety Measures

Recognize Safety Information

”Important” Information

”Note” Information

Prevent Machine Runaway

Handle Fluids Safely-Avoid Fires

Prevent Battery Explosions

Prepare for Emergencies

Prevent Acid Burns

Avoid High-Pressure Fluids

Service Cooling System Safely

Remove Paint Before Welding or Heating

Avoid Heating Near Pressurized Fluid Lines

Work In Ventilated Area

Wear Protective Clothing

Practice Safe Maintenance

Park Machine Safely

Use Proper Lifting Equipment

Construct Dealer-Made Tools Safely

Support Machine Properly

Work in Clean Area

Illuminate Work Area Safely

Service Machines Safely

Use Proper Tools

Service Tires Safely

Service Front-Wheel Drive Tractor Safely

Avoid Eye Contact With Radar

Keep ROPS Installed Properly

Replace Safety Signs

Dispose of Waste Properly

Live With Safety

Safety Measures on Electronic Control Units

Group 15: General References

Reference 210-15-001, General References-Summary

Reference 210-15-010, Unified Inch Bolt and Cap Screw Torque Values

Reference 210-15-015, Metric Bolt and Cap Screw Torque Values

210-15-020, Hydraulic System Inch Fitting Torques

210-15-025, Hydraulic System Metric Fitting Torques

210-15-030, Component Identification Table

Reference 210-15-035, How to Read a Functional Schematic

210-15-040, How to Read a Diagnostic Schematic

210-15-042, Wire Numbers and Color Codes

210-15-045, Schematic, Wiring and Harness Symbols

Reference 210-15-046, Troubleshooting Unsolved Problems

210-15-050, Visual Check of the Electrical System

Reference 210-15-055, Electrical Circuit Malfunctions

Reference 210-15-060, Seven Step Electrical Test Procedure

210-15-065, Hydraulic System - Circuit Symbols

Section 220: ENGINE

Group 10: Operational Check-Out

Reference 220-10-010, Safety

220-10-020, Preliminary Engine Tests

Group 15: Tests and Adjustments

Reference 220-15-001, Tests and Adjustments-Summary of References

220-15-010, Dynamometer Test

Reference 220-15-020, Measuring PTO Power Output

Engine Tests with Service ADVISOR

Section 230: FUEL, AIR INTAKE AND COOLING SYSTEMS

Group 15: Tests and Adjustments

Reference 230-15-001, Tests and Adjustments - Summary of References

Reference 230-15-010, General information

Reference 230-15-020, Explanation of Checks

Reference 230-15-030, Safety

Reference 230-15-040, Special Tools

Reference 230-15-050, Specifications

Reference 230-15-060, Testing the Air Intake System

Reference 230-15-070, Checking the Cooling System for Leaks

Reference 230-15-075, Flow-testing in the Low-Temperature Circuit (not for tractors with AutoPowr)

Reference 230-15-076, Flow-testing in the Low-Temperature Circuit (tractors with AutoPowr)

Reference 230-15-080, Testing the Temperature at which the Thermostat opens

Reference 230-15-090, Checking the Viscous Fan Drive

Reference 230-15-100, Checking the fuel transfer pump

Reference 230-15-110, Hand Throttle Lever and Accelerator Pedal Adjustment

Reference 230-15-120, Accelerator Pedal Adjustment

Group 20: Operation

Reference 230-20-001, Component Description - Summary of References

Reference 230-20-010, Fuel System - Description

Reference 230-20-020, Air Intake System - Theory of Operation

Reference 230-20-030, Coolant Circuit - Description

Reference 230-20-040, Cooling System Radiator - Description

Reference 230-20-050, Intercooler - Description

Reference 230-20-060, Ring-Shaped (Transmission Oil) Cooler - Description

Reference 230-20-070, Viscous Fan Drive - Theory of Operation

Reference 230-20-080, Automatic Drive Belt Tensioner - Theory of Operation

Reference 230-20-020, Cold Weather Starting Aids - Theory of Operation

Section 240: ELECTRICAL SYSTEM

Group 10: Sub-System Diagnostics (Cab)

Reference 240-10-001, Sub-System Diagnostics (Cab) - Summary of References

Reference 240-10-002, Special Tools

Reference 240-10-050, SE1 - Starting Motor and Charging Circuit

Reference 240-10-004, SE2 - Basic Informator (BIF)

Reference 240-10-005, SE3 - Horn

Reference 240-10-006, SE4 - Cigarette Lighter and Operator's Seat

Reference 240-10-007, SE6 - Lights

Reference 240-10-008, SE7 - Worklights

Reference 240-10-009, SE8 - Front Loader Plug

Reference 240-10-010, SE9 - Radio, Dome Light, Console Light and Access Step Light

Reference 240-10-011, SE10 - Fan, Air-Conditioning and ATC Automatic Air-Conditioning Control (ClimaTrak)

Reference 240-10-012, SE11 - Windshield Wiper and Washer

Reference 240-10-013, SE12 - Rear Window Wiper and Washer

Reference 240-10-014, SE13 - Beacon Light

Reference 240-10-015, SE14 - 3- and 7-Terminal Power Outlet Sockets

Reference 240-10-016, SE15 - Electronic Hitch Control (BCU)

Reference 240-10-017, SE16A - Basic Control Unit (BCU) (Rear PTO and External Control)

Reference 240-10-018, SE16B - Basic Control Unit (BCU) (Front PTO)

Reference 240-10-019, SE16C - Basic Control Unit (BCU) (Front-Wheel Drive)

Reference 240-10-020, SE16D - Basic Control Unit (BCU) (Differential Lock)

Reference 240-10-021, SE16E - Basic Control Unit (BCU) (Hazard Warning and Turn Signal Lights)

Reference 240-10-051, SE16F - Basic Control Unit (BCU) (Speed Sensor and Radar with PowrQuad Plus, AutoQuad and AutoQuad Plus Transmissions)

Reference 240-10-022, SE16F - Basic Control Unit (BCU) (Speed Sensor and Radar with AutoPowr/IVT Transmission)

Reference 240-10-023, SE16G - Basic Control Unit (BCU) (Headland Management System II)

Reference 240-10-024, SE16H - Basic Control Unit (BCU) (Power Supply, Acoustic Alarm)

Reference 240-10-025, SE16I - Basic Control Unit (BCU) (LTC Coolant Pump)

Reference 240-10-026, SE16J - Basic Control Unit (BCU) (Brake System and Handbrake Monitor Unit)

Reference 240-10-027, SE17 - Signal and Service Sockets

Reference 240-10-028, SE18 - Performance Monitor (PRF)

Reference 240-10-029, SE20 - Front-Wheel Drive Axle with TLS and Cab Suspension (SFA)

Reference 240-10-030, SE21 - Electronic Actuation of SCVs

Reference 240-10-031, SE21A - Stepper Motor Driver for Electronic Independent Control Valves (E-ICV)

Reference 240-10-032, SE21B - Stepper Motor Drivers for Electronic Selective Control Valves (E-SCV)

Reference 240-10-033, SE22 - CAN BUS Terminating Resistor

Reference 240-10-052, SE23A - Electronic engine control, Level 1 ECU (TIER I engine) and Level 12 ECU (TIER II engine)

Reference 240-10-034, SE23B - Electronic Engine Control, Level 11 ECU (TIER II engine) (AutoPowr/IVT transmission)

Reference 240-10-046, SE25 - Back-up Alarm

Reference 240-10-035, SE26 - Transmission Control Unit (TCU) (AutoPowr/IVT Transmission)

Reference 240-10-053, SE26A - Transmission Control (EPC) and Electrical Forward/Reverse Controls (PowrQuad Plus, AutoQuad and AutoQuad Plus transmissions)

Reference 240-10-036, SE27 - Transmission Shift (UIC) (AutoPowr/IVT Transmission)

Reference 240-10-037, SE28 - Electronic Park Lock (PLC) (AutoPowr/IVT Transmission)

Reference 240-10-040, SE29 - Electric Rear-View Mirrors

Reference 240-10-038, SE30 - JDLink Control Unit

Reference 240-10-039, SE31 - Heated Rear Window

Reference 240-10-041, SE32 - TEC Control Unit and 60-amp Socket (Implement BUS)

Reference 240-10-042, SE33 - GreenStar

Reference 240-10-045, SE35 - Automatic Steering System (SSU) (AutoTrac)

Reference 240-10-046, SE33 - GreenStar Display 2100

Group 10A: Sub-System Diagnostics (Open Operator's Station)

Reference 240-10A-001, Sub-System Diagnostics (Open Operator's Station) - Summary of References

Reference 240-10-002, Special Tools

Reference 240-10A-003, SE1 - Starting Motor and Charging Circuit

Reference 240-10A-004, SE2 - Instrument Unit

Reference 240-10A-005, SE3 - Horn

Reference 240-10A-006, SE4 - Operator's Seat

Reference 240-10A-007, SE6 - Lights

Reference 240-10A-008, SE7 - Worklights

Reference 240-10A-009, SE14 - 3- and 7-Terminal Power Outlet Sockets

Reference 240-10A-010, SE15 - Electronic Hitch Control (BCU)

Reference 240-10A-011, SE16A - Basic Control Unit (BCU) (Rear PTO)

Reference 240-10A-012, SE16B - Basic Control Unit (BCU) (Front PTO)

Reference 240-10A-013, SE16C - Basic Control Unit (BCU) (Front-Wheel Drive)

Reference 240-10A-014, SE16D - Basic Control Unit (BCU) (Differential Lock)

Reference 240-10A-015, SE16E - Basic Control Unit (BCU) (Hazard Warning Light and Turn Signal Lights)

Reference 240-10A-016, SE16F - Basic Control Unit (BCU) (Speed Sending Units)

Reference 240-10A-017, SE16H - Basic Control Unit (BCU) (Power Supply, Acoustic Alarm and BUS Connection)

Reference 240-10A-018, SE16J - Basic Control Unit (BCU) (Brake System)

Reference 240-10A-019, SE17 - Signal Socket

Reference 240-10A-020, SE22 - CAN BUS Terminating Resistor

Reference 240-10A-021, SE23 - Electronic Engine Control (Level 12 ECU)

Reference 240-10A-022, SE25 - Back-up Alarm

Group 15: Component Tests

Reference 240-15-101, Component Tests - Summary of References

Reference 240-15-001, SE01 - Starting Motor and Charging Circuit

Reference 240-15-002, SE02 - Basic Informator or Instrument Unit

Reference 240-15-003, SE03 - Horn

Reference 240-15-004, SE04 - Cigarette Lighter and Operator's Seat

Reference 240-15-005, SE06 - Lights

Reference 240-15-006, SE07 - Worklights

Reference 240-15-007, SE09 - Radio, Dome Light and Console Light

Reference 240-15-008, SE10 - Fan, Air-Conditioning and ATC Automatic Air-Conditioning Control (ClimaTrak)

Reference 240-15-009, SE11 and SE12 - Windshield Wiper and Washer

Reference 240-15-010, SE13 - Beacon Light

Reference 240-15-011, SE14 - 3- and 7-Terminal Power Outlet Sockets

Reference 240-15-012, SE15 - Electronic Hitch Control (BCU)

Reference 240-15-013, SE16A - Basic Control Unit (BCU) (Rear PTO and External Control)

Reference 240-15-014, SE16B - Basic Control Unit (BCU) (Front PTO)

Reference 240-15-015, SE16C - Basic Control Unit (BCU) (Front-Wheel Drive)

Reference 240-15-016, SE16D - Basic Control Unit (BCU) (Differential Lock)

Reference 240-15-017, SE16E - Basic Control Unit (BCU) (Hazard Flasher and Turn Signal Unit)

Reference 240-15-018, SE16G - Basic Control Unit (BCU) (Headland Management System)

Reference 240-15-019, SE16H - Basic Control Unit (BCU) (Power Supply, Acoustic Alarm)

Reference 240-15-020, SE16I - Basic Control Unit (BCU) (LTC Coolant Pump)

Reference 240-15-021, SE16J - Basic Control Unit (BCU) (Brake System and Handbrake Monitor Unit)

Reference 240-15-022, SE20 - Front-Wheel Drive Axle with TLS and Cab Suspension (SFA)

Reference 240-15-023, SE21 - E-ICV / E-SCV Controller (SIC)

Reference 240-15-024, SE22 - CAN BUS Terminating Resistor

Reference 240-15-025, SE23 - Electronic Engine Control (ECU)

Reference 240-15-026, SE26A - Transmission Control (EPC) and Electrical Forward/Reverse Controls (PowrQuad Plus, AutoQuad and AutoQuad Plus transmissions)

Reference 240-15-028, SE27 - User Interface Controller (UIC) (AutoPowr/IVT Transmission)

Reference 240-15-029, SE28 - Electronic Park Lock (PLC) (AutoPowr/IVT Transmission)

Reference 240-15-030, SE29 - Electric Rear-View Mirrors

Reference 240-15-031, SE31 - Heated Rear Window

Reference 240-15-032, SE32 - Control Unit TEC and 60-amp Socket (Implement BUS)

Group 25: Functional Schematics (AutoPowr/IVT Transmission)

Reference 240-25-001, Functional Schematics and Fuses (AutoPowr/IVT Transmission) - Summary of References

Reference 240-25-007, Fuses and Relays (AutoPowr/IVT transmission) from Serial No. 398656

Reference 240-25-003, Designation of Parts Shown in Functional Schematic and Harness Diagram

Reference 240-25-004, Designation of Sections Shown in Functional Schematic

Reference 240-25-005, Wiring Harness Designations