Complete Diagnosis & Tests Technical Manual with electrical wiring diagrams for John Deere 2WD or MFWD - Brazil Tractors 6415, 6615, 7515, with all the shop information to maintain, diagnose, repair, and service like professional mechanics.

John Deere Tractors 6415, 6615, 7515 workshop Diagnosis & Tests technical manual includes:
* 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.

tm8128 - 6415, 6615 and 7515 Tractors Technical Manual.pdf

PRODUCT DETAILS:
Total Pages: 1,633 pages
File Format: PDF (bookmarked, ToC, Searchable, Printable, high quality)
Language: English

MAIN SECTIONS
  Foreword
   Recognize Safety Information
   Follow Safety Instructions
   Replace Safety Signs
   Wear Protective Clothing
   Prevent Battery Explosions
   Service Tires Safely
   Keep ROPS Installed Properly
   Park Machine Safely
   Handle Fluids Safely-Avoid Fires
   Handle Fuel Safely-Avoid Fires
   Prepare for Emergencies
   Work in Clean Area
   Prevent Machine Runaway
   Work In Ventilated Area
   Avoid High-Pressure Fluids
   Use Proper Lifting Equipment
   Illuminate Work Area Safely
   Use Proper Tools
   Live With Safety
   General Information
      Safety Measures
      General References
   Diagnostic Trouble Codes
      BCU Diagnostic Trouble Codes
   Observable Symptoms
      Electrical System
      SyncroPlus Transmission
      PowrQuad Transmissions
      Drive Systems
      Steering and Brakes
      Hydraulic System
      Operator`s Cab
   System Diagnosis
      Electronics
   Engine
      Operational Checks
      Tests and Adjustments
   Fuel, Air Intake and Cooling Systems
      Tests and Adjustments
      Operational Theory
   Electrical System - Cab Tractors
      Fuse Box
      Starting and Charging Circuit
      Panel Warning Lights
      Lights and Tail Lights
      Work Lights
      Radio, Dome Light, Console Light and Beacon Light
      Horn and Accessories Socket
      Fan and A/C
      Reverse Light and Backup Alarm
      Front Windshield Wiper and Washer
      Rear Windshield Wiper and Washer
      Trailer Connector
      BCU - Turn Signal and Hazard Warning Lights
      BCU - Electronic Hitch-Control - 6415/6615
      BCU - Electronic Hitch-Control - 7515
      BCU - Brakes
      BCU - Service Connector
      BCU - PTO
      BCU - Engine Speed Sensor
      BCU - Front-Wheel Drive
      BCU - Differential Lock
      Component Tests
      Connectors
   Electrical System - Open Operator`s Station
      Fuse Box
      Starting and Charging Circuit
      Panel Warning Lights
      Lights and Tail Lights
      Work Lights
      Horn
      Reverse Light and Backup Alarm
      Trailer Connector
      BCU - Turn Signal and Hazard Warning Lights
      BCU - Electronic Hitch-Control - 6415/6615
      BCU - Electronic Hitch-Control - 7515
      BCU - Brakes
      BCU - Service Connector
      BCU - PTO
      BCU - Engine Speed Sensor
      BCU - Front-Wheel Drive
      BCU - Differential Lock
      Component Tests
      Connectors
   Electronic Control Units
      Operation and General Information on Diagnostics
      Data BUS Systems, Operation
      BCU - Basic Control Unit
   SyncroPlus Transmission
      Preliminary Checks
      Operational Check
      Tests and Adjustments
      Operation
   PowrQuad Transmissions
      Operational Check
      Tests and Adjustments
      Operation
      Range Box
   Drive Systems
      Operational Check
      Tests and Adjustments
      Operation
   Steering and Brakes
      Preliminary Checks
      Operational Check
      Tests and Adjustments
      Operation
   Hydraulic System
      Operational Check
      Tests and Adjustments
      Operation
   Operator`s Cab
      Tests and Adjustments
      Operation
   Special Tools (Dealer-Fabricated)

tm8128 - 6415, 6615 and 7515 Tractors

Table of Contents

Foreword

Recognize Safety Information

Follow Safety Instructions

Replace Safety Signs

Wear Protective Clothing

Prevent Battery Explosions

Service Tires Safely

Keep ROPS Installed Properly

Park Machine Safely

Handle Fluids Safely—Avoid Fires

Handle Fuel Safely—Avoid Fires

Prepare for Emergencies

Work in Clean Area

Prevent Machine Runaway

Work In Ventilated Area

Avoid High-Pressure Fluids

Use Proper Lifting Equipment

Illuminate Work Area Safely

Use Proper Tools

Live With Safety

Section 210: General Information

Group 05: Safety Measures

Safety Measures on Electronic Control Units

Group 15: General References

General References—Summary

Unified Inch Bolt and Cap Screw Torque Values

Metric Bolt and Cap Screw Torque Values

Hydraulic System Unified Inch Fitting Torques

Hydraulic system metric fitting torques

Component Identification Table

Diagnostic Diagram and Information on Symbols in DiagramHow to use an Electrical Diagram

Electrical Diagram Symbols

Wire Numbers and Color Codes

Troubleshooting Unsolved Problems

Electrical System Visual Inspection

Circuit Malfunctions

Seven Steps Electrical Test Procedure

Hydraulic System — Circuit Symbols

Section 211: Diagnostic Trouble Codes

Group BCU: BCU Diagnostic Trouble Codes

BCU 000168.16 - System Voltage Too High (Engine Running)

BCU 000168.17 - System Voltage Too Low (Engine Speed Over 1500 rpm)

BCU 000168.18 - System Voltage Too Low (Engine Speed Up to 1500 rpm)

BCU 000190.02 - Engine Speed Sender, Circuit Fault

BCU 000629.12 - Control Unit, Internal Error

BCU 000639.12 - Control Unit, Internal Error

BCU 000639.13 - 29-bit CAN BUS, High Error Rate

BCU 000639.19 - 29-bit CAN BUS, Very High Error Rate

BCU 000746.31 - Differential Lock Solenoid Valve, Circuit Fault

BCU 000980.07 - PTO, Switch Error

BCU 299780.07 - Malfunction at Turn Signal Switch

BCU 302001.31 - OPERATOR INFORMATION 250-Hour Service

BCU 302002.31 - OPERATOR INFORMATION 500-Hour Service

BCU 302003.31 - OPERATOR INFORMATION 750-Hour Service

BCU 302004.31 - OPERATOR INFORMATION 1500-Hour Service

BCU 302071.31 - OPERATOR INFORMATION Turn PTO switch OFF

BCU 302073.31 - PTO Solenoid, Circuit Fault

BCU 302080.31 - Differential Lock, Switch Error

BCU 302082.31 - OPERATOR INFORMATION Actuate Front-Wheel Drive Switch

BCU 302085.31 - Front Wheel Drive, Switch Error

BCU 302086.31 - Front-Wheel Drive Clutch Solenoid, Circuit Fault

BCU 302089.31 - OPERATOR INFORMATION Turn PTO switch OFF

BCU 302106.31 - Control Unit, Internal Error

BCU 302131.31 - Fault in Turn Signal Circuit

BCU 302132.31 - Defective Hazard Warning Light Fuse F113 and/or F114

BCU 302133.31 - PTO, Switch Error

BCU 302240.31 - Control Unit Connected to Wrong Wiring Harness Connector

BCU 303027.31 - Calibration of Hitch Control Unit Not Successful

BCU 303028.31 - Hitch Control Unit Not Calibrated

BCU 303037.03 - 5-Volt Supply Voltage Too High

BCU 303037.04 - 5-Volt Supply Voltage Too Low

BCU 303041.02 - Stepper Motor Coil 1, Open Lead

BCU 303042.02 - Stepper Motor Coil 2, Open Lead

BCU 303043.02 - Stepper Motor Coil 1, Circuit Fault

BCU 303044.02 - Stepper Motor Coil 2, Circuit Fault

BCU 303045.04 - System Voltage Too Low

BCU 303047.03 - System Voltage Too High

BCU 303049.02 - Conflicting Signals from Quick Raise/Lower Switch and Remote Switch

BCU 303049.03 - Rapid Raise/Lower Rocker Switch, Signal Voltage Too High

BCU 303049.04 - Rapid Raise/Lower Rocker Switch, Signal Voltage Too Low

BCU 303051.03 - Left Draft Sender, Signal Voltage Too High

BCU 303051.04 - Left Draft Sender, Signal Voltage Too Low

BCU 303052.03 - Right Draft Sender, Signal Voltage Too High

BCU 303052.04 - Right Draft Sender, Signal Voltage Too Low

BCU 303053.03 - Sensitivity Potentiometer, Signal Voltage Too High

BCU 303053.04 - Sensitivity Potentiometer, Signal Voltage Too Low

BCU 303054.03 - Hitch Height Control Potentiometer, Signal Voltage Too High

BCU 303054.04 - Hitch Height Control Potentiometer, Signal Voltage Too Low

BCU 303055.03 - Position Sensor, Signal Voltage Too High

BCU 303055.04 - Position Sensor, Signal Voltage Too Low

BCU 303056.03 - Raise Limit Potentiometer, Signal Voltage Too High

BCU 303056.04 - Raise Limit Potentiometer, Signal Voltage Too Low

BCU 303057.03 - Rate-of-Drop Potentiometer, Signal Voltage Too High

BCU 303057.04 - Rate-of-Drop Potentiometer, Signal Voltage Too Low

BCU 303058.02 - Remote Control Switch, Erroneous Signal

BCU 303060.02 - Stepper Motor Deadband Out of Range

BCU 303251.02 - Left Draft Sender, Disrupted Signal During Calibration

BCU 303251.03 - Left Draft Sender, Signal Voltage Too High During Calibration

BCU 303251.04 - Left Draft Sender, Signal Voltage Too Low During Calibration

BCU 303252.02 - Right Draft Sender, Disrupted Signal During Calibration

BCU 303252.03 - Right Draft Sender, Signal Voltage Too High During Calibration

BCU 303252.04 - Right Draft Sender, Signal Voltage Too Low During Calibration

BCU 303255.03 - Position Sender, Signal Voltage Too High During Calibration

BCU 303255.04 - Position Sender, Signal Voltage Too Low During Calibration

BCU 303260.16 - Stepper Motor Raising Deadband Above Valid Range During Calibration

BCU 303260.18 - Stepper Motor Raising Deadband Below Valid Range During Calibration

BCU 303261.16 - Stepper Motor Lowering Deadband Above Valid Range During Calibration

BCU 303261.18 - Stepper Motor Lowering Deadband Below Valid Range During Calibration

Section 212: Observable Symptoms

Group 40: Electrical System

Control Unit(s) Not Displayed

Diagnostic Mode Cannot Be Entered or Connection Problems with Service ADVISOR (Cab Tractors)

Diagnostic Mode Cannot Be Accessed or Connection Problems with Service ADVISOR (Open operator's station)

Problems with the Battery

Problems with the Starter Motor

Problems with the Horn — Optional

Problems with the Windshield Wiper

Problems with the Windshield Washer

Group 50: SyncroPlus Transmission

Problems with SyncroPlus Transmission

Group 55: PowrQuad Transmissions

Problems with PowrQuad Transmission

Group 56: Drive Systems

Problems with the PTO

Group 60: Steering and Brakes

Problems with the Brakes

Problems with the Steering

Group 70: Hydraulic System

Problems with the Rockshaft

Problems with the Rockshaft's Remote Control

Group 90: Operator's Cab

Problems with the Air-Conditioning System

Section 213: System Diagnosis

Group 45: Electronics

29-bit CAN BUS - Check (Cab Tractors)

Section 220: Engine

Group 10: Operational Checks

Safety

Preliminary Engine Testing

Group 15: Tests and Adjustments

Dynamometer test

Section 230: Fuel, Air Intake and Cooling Systems

Group 15: Tests and Adjustments

Tests & Adjustments—Summary of References

Safety Information

Explanation Of Checks

Safety

Special Tools

Specification

Testing Air Intake System

Checking the Cooling System for Leaks

Testing Temperature at Which the Thermostat Opens

Hand Throttle Lever and Accelerator Pedal Adjustment

Accelerator Pedal Adjustment

Group 20: Operational Theory

Component Description - Summary of References

Fuel System - Description

Air Intake System - Theory of Operation

Automatic Drive Belt Tensioner - Theory of Operation

Section 240: Electrical System - Cab Tractors

Group 05: Fuse Box

Theory of Operation

Electrical Diagram

Group 05A: Starting and Charging Circuit

Theory of Operation

Electrical Diagram

Group 05B: Panel Warning Lights

Theory of Operation

Electrical Diagram

Group 05C: Lights and Tail Lights

Theory of Operation

Electrical Diagram

Group 05D: Work Lights

Theory of Operation

Electrical Diagram

Group 05E: Radio, Dome Light, Console Light and Beacon Light

Theory of Operation

Electrical Diagram

Group 05F: Horn and Accessories Socket

Theory of Operation

Electrical Diagram

Group 05G: Fan and A/C

Theory of Operation

Electrical Diagram

Group 05H: Reverse Light and Backup Alarm

Theory of Operation

Electrical Diagram

Group 05I: Front Windshield Wiper and Washer

Theory of Operation

Electrical Diagram

Group 05J: Rear Windshield Wiper and Washer

Theory of Operation

Electrical Diagram

Group 05K: Trailer Connector

Theory of Operation

Electrical Diagram

Group 05L: BCU - Turn Signal and Hazard Warning Lights

Theory of Operation

Electrical Diagram

Group 05M: BCU - Electronic Hitch-Control - 6415/6615

Theory of Operation

Electrical Diagram

Group 05N: BCU - Electronic Hitch-Control - 7515

Theory of Operation

Electrical Diagram

Group 05O: BCU - Brakes

Theory of Operation

Electrical Diagram

Group 05P: BCU - Service Connector

Theory of Operation

Electrical Diagram

Group 05Q: BCU - PTO

Theory of Operation

Electrical Diagram

Group 05R: BCU - Engine Speed Sensor

Theory of Operation

Electrical Diagram

Group 05S: BCU - Front-Wheel Drive

Theory of Operation

Electrical Diagram

Group 05T: BCU - Differential Lock

Theory of Operation

Electrical Diagram

Group 10: Component Tests

Starter Motor and Charging Circuit

Instrument Panel

Horn - Optional

Lighting Circuits

Work lights

Dome Light

Fan, Air Conditioning and Automatic A/C control

Windshield Wiper and Washer System

Beacon light - Optional

Electronic Hitch Control

PTO

BCU (FWD)

Differential lock

Hazard Warning Lights Unit

Brake System

Group 15: Connectors

A01 - Fuse and relay box

A02 - Fuse Box 2

A03 - Feedback unit

A08 - Dome Light

A29 - Pneumatic operator's seat and rear wiper

A60 - Radio

B01 - Engine speed sensor

B02 - Sender for air cleaner restriction warning light

B03 - Fuel gauge sensor unit

B04 - Sender for engine oil pressure indicator light

B07 - Transmission oil filter pressure sensor

B08 - Coolant temperature sensor

B14 - Compressor and thermostat switch

B15 - Air conditioning system pressure switch

B19 - R.h. draft sensor - 6415/6615

B20 - L.h. draft sensor - 6415/6615

B21 - Hitch-control position sensor

B27 - Sensitivity potentiometer

B29 - Transmission oil temperature sensor

B30 - Hydrostatic oil temperature sensor

B31 - Transmission oil pressure sender

B36 - Neutral start switch

B41 - Draft potentiometer - 7515

B48 - Backup alarm switch

B88 - Brake switch

E01 - Right-hand front light

E02 - Left-hand front light

E09-R - Right-hand front working light

E09-L - Left-hand front working light

E10-R - Right-hand front working light - option

E10-L - Left-hand front working light - option

E11-1 - Right-hand rear working light

E11-2 - Left-hand rear working light

E12-2 - Console light

E15-R - Right-hand front working light - option

E15-L - Left-hand front working light - option

E27 - Beacon light

F13 - Main fuse

F14 - Main fuse

G01 - Battery

G02 - Alternator

H01 - Horn

H34 - Front left-hand turn signal light

H42 - Front right-hand turn signal light

K01 - Starter relay

K24 - Injection pump shut-off valve

K28 - Backup alarm

M01 - Starter motor

M02 - Air conditioning compressor

M03 - Wiper motor

M04 - Wiper motor

M05 - Windshield washer pump

M06 - Windshield washer pump

M07 - Fan motor

M08 - Hitch-control stepper motor

M10 - Fan motor

P24-1 - Instrument panel

P24-2 - Instrument panel

P24-3 - Instrument panel

R03 - Resistors

S01 - Starter switch

S04 - Horn switch

S08 - Turn signal switch

S09 - Light switch

S10 - Full/low beam light switch

S14 - Fan switch

S15 - Windshield wiper switch

S18 - Rear wiper switch

S20 - Windshield switch

S21 - PTO switch

S22 - Differential lock switch

S36 - Beacon light switch

S42 - Light switch

S59 - Front lights switch

S62 - Hazard warning lights switch

S63 - Front-wheel drive switch

S68 - External hitch-control switch

S92-1 - Front work lights switch - option

S92-2 - Rear work lights switch

S105 - Tail lights switch - optional

W25 - Radio antenna

X05 - Trailer connector

X37 - Accessories socket

X37 - Connector (W05 and W08)

X40 - Connector (W22 and W23)

X42 - Connector (W21 and W22)

X67 - Connector (W05 and W06)

X106 - Tail, brake and turn signal lights (right-hand)

X107 - Tail, brake and turn signal lights (left-hand)

X182 - Connector (W08 and W26)

X234 - Connector (W30 and W31)

X400 - Connector (W08 and W19)

X411 - Connector (W02 and W04)

X430 - Connector (W30 and W31) - 6415/6615

X430 - Connector (W30 and W31) - 7515

X430 - Connector (W08 and W30) - Without Hitch

X431 - Connector (W08 and W28)

X450 - Connector (W02 and W08)

X473 - Connector (W01 and W08)

X504 - Connector (W08 and W09)

X505 - Connector (W08 and W09)

X547 - Connector (W02 and W03)

X571 - Service connector (CAN Bus)

X612 - Speaker connector

X616-1 Basic control unit (BCU)

X616-2 Basic control unit (BCU)

X616-3 Basic control unit (BCU)

XGND1 - Cab ground wire

XGND2 - Cab ground wire

XGND6 - Rear wiper ground wire

XGND9 - Engine grounding

XGND10 - Cab roof ground wire

XGND58 - Fan and A/C wiring harness grounding

Y03 - Front-wheel drive solenoid valve

Y04 - PTO Solenoid

Y05 - Differential lock solenoid valve

Section 241: Electrical System - Open Operator's Station

Group 05: Fuse Box

Theory of Operation

Electrical Diagram

Group 05A: Starting and Charging Circuit

Theory of Operation

Electrical Diagram

Group 05B: Panel Warning Lights

Theory of Operation

Electrical Diagram

Group 05C: Lights and Tail Lights

Theory of Operation

Electrical Diagram

Group 05D: Work Lights

Theory of Operation

Electrical Diagram

Group 05E: Horn

Theory of Operation

Electrical Diagram

Group 05F: Reverse Light and Backup Alarm

Theory of Operation

Electrical Diagram

Group 05G: Trailer Connector

Theory of Operation

Electrical Diagram

Group 05H: BCU - Turn Signal and Hazard Warning Lights

Theory of Operation

Electrical Diagram

Group 05I: BCU - Electronic Hitch-Control - 6415/6615

Theory of Operation

Electrical Diagram

Group 05J: BCU - Electronic Hitch-Control - 7515

Theory of Operation

Electrical Diagram

Group 05K: BCU - Brakes

Theory of Operation

Electrical Diagram

Group 05L: BCU - Service Connector

Theory of Operation

Electrical Diagram

Group 05M: BCU - PTO

Theory of Operation

Electrical Diagram

Group 05N: BCU - Engine Speed Sensor

Theory of Operation

Electrical Diagram

Group 05O: BCU - Front-Wheel Drive

Theory of Operation

Electrical Diagram

Group 05P: BCU - Differential Lock

Theory of Operation

Electrical Diagram

Group 10: Component Tests

Starter Motor and Charging Circuit

Instrument Panel

Horn - Optional

Lighting Circuits

Work lights

Electronic Hitch Control

PTO

BCU (FWD)

Differential lock

Hazard Warning Lights Unit

Brake System

Group 15: Connectors

A01 - Fuse and relay box

A03 - Feedback unit

B01 - Engine speed sensor

B02 - Sender for air cleaner restriction warning light

B03 - Fuel gauge sensor unit

B04 - Sender for engine oil pressure indicator light

B07 - Transmission oil filter pressure sensor

B08 - Coolant temperature sensor

B19 - R.h. draft sensor - 6415/6615

B20 - L.h. draft sensor - 6415/6615

B21 - Hitch-control position sensor

B27 - Sensitivity potentiometer

B29 - Transmission oil temperature sensor

B30 - Hydrostatic oil temperature sensor

B31 - Transmission oil pressure sender

B36 - Neutral start switch

B41 - Draft potentiometer - 7515

B48 - Backup alarm switch

B88 - Brake switch

E01 - Right-hand front light

E02 - Left-hand front light

E09-R - Right-hand front working light

E09-L - Left-hand front working light

E11-1 - Right-hand rear working light

E11-2 - Left-hand rear working light

F13 - Main fuse

F14 - Main fuse

G01 - Battery

G02 - Alternator

H01 - Horn

H34 - Front left-hand turn signal light

H42 - Front right-hand turn signal light

K01 - Starter relay

K24 - Injection pump shut-off valve

K28 - Backup alarm

M01 - Starter motor

M08 - Hitch-control stepper motor

P24-1 - Instrument panel

P24-2 - Instrument panel

P24-3 - Instrument panel

S01 - Starter switch

S04 - Horn switch

S08 - Turn signal switch

S09 - Light switch

S10 - Full/low beam light switch

S21 - PTO switch

S22 - Differential lock switch

S42 - Light switch

S59 - Front lights switch

S62 - Hazard warning lights switch

S63 - Front-wheel drive switch

S68 - External hitch-control switch

S92-2 - Rear work lights switch

X05 - Trailer connector

X21 - Connector (W07 and W08)

X37 - Connector (W05 and W07)

X67 - Connector (W05 and W06)

X106 - Tail, brake and turn signal lights (right-hand)

X107 - Tail, brake and turn signal lights (left-hand)

X234 - Connector (W08 and W31)

X286 - Connector (W08 and W28)

X287 - Connector (W30 and W31) - 6415/6615

X287 - Connector (W30 and W31) - 7515

X287 - Connector (W08 and W30) - Without Hitch

X288 - Connector (W02 and W08)

X289 - Connector (W02 and W08)

X411 - Connector (W02 and W04)

X473 - Connector (W01 and W08)

X504 - Connector (W08 and W09)

X505 - Connector (W08 and W09)

X547 - Connector (W02 and W03)

X571 - Service connector (CAN Bus)

X616-1 Basic control unit (BCU)

X616-2 Basic control unit (BCU)

X616-3 Basic control unit (BCU)

X811-1 - Connector (W08 and W20)

X811-2 - Connector (W08 and W19)

XGND1 - Platform ground wire

XGND2 - Platform ground wire

XGND9 - Engine grounding

XGND26 - Grounding point

Y03 - Front-wheel drive solenoid valve

Y04 - PTO Solenoid

Y05 - Differential lock solenoid valve

Section 245: Electronic Control Units

Group 05: Operation and General Information on Diagnostics

Special Tools

General Operation and Entering the Program Mode

Calling up Addresses and Diagnostic Trouble Codes

Electronic Control Units — Summary of Addresses

Group 20: Data BUS Systems, Operation

Data BUS systems — Summary of References

Data BUS systems

CAN BUS Systems

CAN-BUS Systems on Cab and Open Operator's Station Tractors

CAN BUS Systems – Plug Layout

Group BCU: BCU - Basic Control Unit

BCU — Basic Control Unit — Summary of References

Hitch-Control Calibration and Input Addresses

Test Procedure in the Case of Occasional BCU Circuit Problems

Circuit test for PTO Switch (S21)

Circuit test for front-wheel drive switch (S63)

Circuit test for Differential Lock Switch (S22)

Circuit test for hazard warning switch (S62)

Circuit test for Hazard Warning Switch (S66)

Circuit test for turn signal switch (S08)

Circuit test for Engine Speed Sender (B01)

Circuit test for Rockshaft Control Stepper Motor (M08)

Circuit test for PTO Switch (S21) -Open Operator's Station

Circuit test for Front-Wheel Drive Switch (S63) - Open operator's station

Circuit test for Differential Lock Switch (S22) - Open operator's station

Circuit test for Turn Signal Switch (S08) - Open operator's station

Circuit test for Engine Speed Sender (B01) – Open operator's station

Circuit test for Sensitivity Potentiometer (B26) – Open operator's station

Circuit test for Depth-setting Potentiometer (B27) – Open operator's station

Circuit test for Position Sensor (B21) – Open operator's station

Circuit Test on Rate-of-Drop Potentiometer (B27) – Open Operator's Station

Circuit test for Paise-Limit Potentiometer – Open operator's station

Circuit/harness test for rapid raise switch (S24) — Open operator's station

Circuit test for PTO solenoid valve (Y04) - Open operator's station

Circuit test for Front-Wheel Drive Solenoid Valve (Y03) - Open operator's station

Circuit test for Differential Lock Solenoid Valve (Y05) - Open operator's station

Circuit test on R.H. Draft Sensor (B19) – Open operator's station

Circuit test on L.H. Draft Sensor (B20) – Open operator's station

Circuit test for Left Remote Control Switch (S68) - Open Operator's Station

Circuit test for Rockshaft Control Stepper Motor (M08) – Open operator's station

Circuit test for PTO Switch (S21)

Circuit test for Front-Wheel Drive Switch (S63)

Circuit test for Differential Lock Switch (S22)

Circuit test for Hazard Warning Switch (S106)

Circuit test for Turn Signal Switch (S08)

Circuit test for Engine Speed Sender (B01)

Circuit test for Sensitivity Potentiometer (B26)

Circuit test for Depth-setting Potentiometer (B27)

Circuit test for Position Sensor (B21)

Circuit test for Rate-of-Drop Potentiometer (B27)

Circuit test for Raise-Limit Potentiometer (B27)

Circuit/harness test for Rapid Raise Switch (S24)

Circuit test for PTO Solenoid Valve (Y04)

Circuit test for Front-Wheel Drive Solenoid Valve (Y03)

Circuit test for Differential Lock Solenoid Valve (Y05)

Circuit Test for R.H. Draft Sensor (B19)

Circuit test on L.H. Draft Sensor (B20)

Circuit test for Left Remote Control Switch (S68)

Circuit test for Rockshaft Control Stepper Motor (M08)

BCU — Theory of Operation (Basic Functions)

Theory of Operation (Hitch Control)

Section 250: SyncroPlus Transmission

Group 05: Preliminary Checks

Special Tools

Digital Diagnostic Kit—DQ61642 Use KIT FKM10471 abroad

Introductory Checks for Transmission and Hydraulic Diagnosis

Group 10: Operational Check

SyncroPlus Transmission — Operational Check

Group 15: Tests and Adjustments

SyncroPlus Transmission—System Check

SyncroPlus Transmission—Checking System Pressure

SyncroPlus Transmission—Adjusting System Pressure

SyncroPlus Transmission—Checking Components Dependent on System Pressure

SyncroPlus Transmission—Checking the Filter Relief Valve

SyncroPlus Transmission—Checking the Engagement Override Valve and Clutch Pedal Valve

SyncroPlus Transmission—Checking the Modulation of the Clutch Pedal Valve

SyncroPlus Transmission—Checking Lube Oil Pressure

SyncroPlus Transmission—Checking Cooling System

SyncroPlus Transmission—Checking Flow Rate

SyncroPlus Transmission—Checking the Cooler Relief Valve

SyncroPlus Transmission—Checking the Transmission Oil Filter

SyncroPlus Transmission—Layout of Test Ports and Sending Units

SyncroPlus Transmission—Checking and Adjusting the Shift Units

SyncroPlus Transmission—Adjusting the Park Lock

SyncroPlus Transmission—Checking and Adjusting the Linkage on the Range Transmission

SyncroPlus Transmission — Checking and Adjusting Shift Drive

SyncroPlus Transmission—Checking and Adjusting the Neutral Start Switch

SyncroPlus Transmission—Adjusting the Clutch Pedal

Group 20: Operation

SyncroPlus Transmission — Summary of References

SyncroPlus Transmission —Cross-sectional View

SyncroPlus Transmission—Lubrication system

SyncroPlus Transmission—Shifter Linkage

SyncroPlus Transmission —Synchronization

SyncroPlus Transmission—Operation of Transmission Oil Circuit (including Diagram)

Clutch Components PermaClutch

Transmission Hydraulic Circuit

Transmission Oil Circuit

Perma Clutch II Module—Exploded View

Perma Clutch II Module—Cross-sectional View

Clutch Activation

Perma Clutch II Module—Power Flow

Perma Clutch II Module—Transmission Oil Pump

Perma Clutch II Module—Hydraulic Circuit Diagram

Perma Clutch II Module—Description of Various Valves and Components

Perma Clutch II Module—Operation of Pressure Regulating Valve and Filter Relief Valve

Perma Clutch II Module—Operation of Clutch Pedal Valve and Engagement Override Valve

Perma Clutch II Module—Operation of Cooling System

Function of Centrifugal Valve and Suction Valve

Description of Gear Shift—Cross-sectional View

Description of Gear Shift—Power Flow

Gear Shift— Neutral Start Switch

Creeper Transmission— Cross-sectional View and Operation

Creeper Transmission—Power Flow

Section 255: PowrQuad Transmissions

Group 10: Operational Check

Special Tools

PowrQuad Transmission—Operational Check

Group 15: Tests and Adjustments

PowrQuad Transmission—System Check

POWRQUAD transmission—Test Ports

PowrQuad Transmission—Checking Rate of Flow at Cooler

PowrQuad Transmission—Checking the Cooler Relief Valve

PowrQuad Transmission—System Pressure Check

PowrQuad Transmission—Checking Lube Oil Pressure

PowrQuad Transmission—Checking Cooling Oil Pressure (Forward Clutch)

PowrQuad Transmission—Checking Cooling Oil Pressure (Reverse Brake)

PowrQuad Transmission—Checking Pressure at Forward Clutch

PowrQuad Transmission—Checking Pressure at Reverse Brake

PowrQuad Transmission—Checking Pressure at Brake B1

PowrQuad Transmission—Checking Pressure at Brake B2

PowrQuad Transmission—Checking Pressure at Brake B3

PowrQuad Transmission—Checking Pressure at Clutch C4

PowrQuad Transmission—Adjusting System Pressure

PowrQuad Transmission—Test Result Table

Adjusting Gear Shift

Adjusting Forward/Reverse Cable

Adjusting Park Lock

Group 20: Operation

PowrQuad Transmissions — Summary of references

PowrQuad Transmission—Layout

PowrQuad Module—Layout

PowrQuad Module—Cross-Sectional and 3D View

PowrQuad Module—Location of Valves, Sensors and Switches

PowrQuad Module—Element Engagement Chart

PowrQuad Module—Pneumatic Pump

PowrQuad Module—Transmission Oil Pump

PowrQuad Module — Pressure-Regulating Valve and Filter Relief Valve

PowrQuad Module—Overspeed Relief Valve and Anti-Cavitation Check Valve

PowrQuad Module—Clutch Cooling Components

PowrQuad Module —Clutch Cooling Valve (Forward/Reverse)

PowrQuad Module—System 1 Oil and System 2 Oil

PowrQuad Module—Hydraulic Schematic, Mechanically Actuated PowrQuad Module

PowrQuad Module—Operation of Forward/Reverse Modulation, Mechanically Actuated PowrQuad Module

PowrQuad Module—Neutral Start Circuit, Mechanically Actuated PowrQuad Module

PowrQuad Module—Operation of Gear-to-Gear Modulation, Mechanically Actuated PowrQuad Module

Group 30: Range Box

Range Transmission (6415 and 6615 Tractors), Cross-Sectional View

Range Transmission (6415 and 6615 Tractors), Power Flows

Range Transmission, Park Lock (6415 and 6615 Tractors)

Range Transmission (7515 Tractors), — Cross-Sectional View

Creeper Transmission (6415 and 6615 Tractors)—Operation

Creeper Transmission (6415, 6615 and 7515 Tractors)—Power Flow

Section 256: Drive Systems

Group 10: Operational Check

Special Tools

Drive Systems—Operational Check

Group 15: Tests and Adjustments

Drive Systems—System Check

Checking Pressure at the Front-Wheel Drive Clutch

Checking Pressure at the Hydraulic Differential Lock

Checking Pressure at the PTO

Drive Systems—Test Result Table

Group 20: Operation

Drive Systems—Reference Summary

Front Wheel Drive Clutch (6415 and 6615 Tractors)—Cross-Sectional View

Front Wheel Drive Clutch (6415 and 6615 Tractors)—Oil Flow and Power Flow

Front Wheel Drive Clutch (6415 and 6615 Tractors)—Cooling and Lubrication

Front Wheel Drive Clutch (7515 Tractors)—Cross-Sectional View

Front Wheel Drive Clutch (7515 Tractors)—Oil Flow and Power Flow

Front Wheel Drive Clutch Disengaged (7515 Tractors)—Oil Flow

Differential (6415 and 6615 Tractors)—Cross-Sectional View

Differential (7515 Tractors)—Cross-Sectional View

Differential—Power Flows

Differential—Oil Flows

Final Drives (6415 and 6615 Tractors)—Cross-Sectional View

Final Drives (7515 Tractors)—Operation and Cross-Sectional View

PTO Options—Description

PTO Options—PTO Modulating Valve and Solenoid Valve

PTO Options—PTO brake and PTO clutch

PTO Options—Power Flows

Section 260: Steering and Brakes

Group 05: Preliminary Checks

Tests & Adjustments—Summary of References

Preliminary Checks – Steering System

Preliminary Checks – Brake System

Group 10: Operational Check

Operational Checkout (Summary of References)

Safety Information

Check Steering

Checking Brakes

Group 15: Tests and Adjustments

Tests & Adjustments—Summary of References

Special Tools

Flow Meter Kit—DQ63621

DQ61642—Pressure, Temperature, Engine Speed and Flow Gauges Kit Use KIT FKM10471 for export

Specification

Checking Steering Valve

Checking Brake System

Bleeding the Rear Brakes

Adjusting Brake Pedals and Switches

Group 20: Operation

Operation —Summary of References

Description of Steering Valves, Operation

Operation of Brake Piston, Plate and Disks

Brake released

Initial Braking

Brake Engaged

Rear Wheel Brakes, Operation

Section 270: Hydraulic System

Group 10: Operational Check

Special Tools

Checking Hydraulic System Load

Hitch Control – Operational Check

External Control of Hitch – Operational Check

Selective Control Valves – Operational Check

Group 15: Tests and Adjustments

Tests and Adjustments — Summary of References

Safety Measures for Hydraulic Checks

Warming Hydraulic System Oil

Hydraulic System — Oil Pressure Test Ports

PFC Hydraulic System Check

PFC Hydraulic System — Test Result Table

PC Hydraulic System Check

PC Hydraulic System — Test Result Table

Charge Pump — Checking Lube Oil Pressure

Charge Pump — Checking Flow Rate

Hydraulic Pump — Testing and Adjusting the System Pressure (PFC Hydraulic System)

Charge Pump — Checking Flow Rate (PFC Hydraulic System)

Hydraulic Pump — Checking the Delivery Rate (PC Hydraulic System)

Hydraulic Pump — Pressure-and-flow Regulator Check

Checking the Pressure Differential Dynamically (PFC Hydraulic System Only)

Checking the LS (Load-Sense) Pressure

Selective Control Valves — Check for Leaks at Valve Spools (PFC Hydraulic System Only)

Selective Control Valves (SCV) — Checking for Leaks in Couplers

300 and 301 Series Selective Control Valves—Adjust Detent Kickout Relief Valve Parts

Selective Control Valves—Adjusting Left Endplate With Additional LS Port For External Consumers

Selective Control Valves —Adjusting Right Endplate With Additional Ports For External Consumers

Checking Stepper Motor and Rockshaft Valve

Rockshaft Valve — Checking for Leaks

Rockshaft Valve — Checking the Pressure-Relief Valve

Rockshaft Valve — Checking Depth to Which Pressure and Discharge Valves are Screwed In

Rockshaft Valve — Checking the Position Sensor

Rockshaft—Testing and Adjusting the Draft Sensors (6415 and 6615)

Rockshaft — Testing and Adjusting the Draft Potentiometer (7515)

Adjusting the Power Beyond Valve

Group 20: Operation

PFC Hydraulic System — Summary of References

PC Hydraulic System — Summary of References

PFC Hydraulic System — Description

PFC Hydraulic System — Operation

PFC Hydraulic System — Symbolic Representation

PFC Hydraulic System — Schematic View

PFC Hydraulic System — Three-Dimensional View

PC Hydraulic System — Description

PC Hydraulic System — Operation

PC Hydraulic System — Symbolic Representation

PC Hydraulic System — Schematic View

PC Hydraulic System — Three-Dimensional View

PFC Hydraulic System — Charge Pump, Description and Operation

PFC Hydraulic System — Hydraulic Pump Description

PFC Hydraulic System — Oil Lines of Hydraulic Pump

PFC Hydraulic System — Hydraulic Pump Operation

PFC Hydraulic System — Hydraulic Pump Operating Modes

Hydraulic Pump Description'

PC Hydraulic System — Oil Lines of Hydraulic Pump

PC Hydraulic System — Hydraulic Pump Operation

Primary Hydraulic Oil Filter — Description

Hydraulic System — Description of Hydraulic Oil Filter

PC Hydraulic System — Lube Priority Valve Pump Description

PFC Hydraulic System — Description and Arrangement of Shuttle Valves

PFC Hydraulic System — Operation of Shuttle Valves

PC Hydraulic System — Description and Arrangement of Shuttle Valves

PFC Hydraulic System — Description of Main Block with Priority Valve

PFC Hydraulic System — Operation of Priority Valve in Main Block

PC Hydraulic System — Description of Main Block with Priority Valve and By-Pass Valve

PC Hydraulic System — Operation of Priority Valve and By-Pass Valve

Power Beyond Valve — Operação

Rockshaft — Description

Rockshaft — Operation of Rockshaft Control

Rockshaft — Operation of Rockshaft Valve

Rockshaft — Operation of Position Sensor

Rockshaft — Operation of Position Sensor

Rockshaft — Description of Controls

Rockshaft — Direct Drive

100 and 300 Series Selective Control Valves (Mechanically Actuated) — Description

100 Series Selective Control Valve (Mechanically Actuated) — Operation

300 Series Selective Control Valve (Mechanically Actuated) — Operation

101 and 301 Series Selective Control Valves — Description

Couplers — Description

Selective Control Valve End Plate — Summary

Section 290: Operator's Cab

Group 15: Tests and Adjustments

Operational Checkout (Summary of References)

Safety in the Workplace

Handling Refrigerant

Safety Equipment

In the Event of an Emergency

Storage of Refrigerant Containers

Refrigerant R134a

Important

Special Tools

Specification

Explanation Of Checks

Pressure Deviations

Group 20: Operation

Operation of Air Conditioning/Heating/Ventilation—Summary of References

Principle of Heat Exchange

Refrigerant R134a

Refrigerant Circuit Layout (Cab Tractors)

Refrigerant Circuit Operation

Component Description

Expansion Valve

Thermostat Switch

Heating and Ventilation

Section 299: Special Tools (Dealer-Fabricated)

Group 05: Special Tools (Dealer-Fabricated)

Special Tools (Dealer-Fabricated) — Summary

Retainer Tool

Adjustment Tool

DFRW2—Needle Valve Test Hose Assembly

DFLX10 and DFLX11—Test Harnesses

DFLX12—Special Tool for 11-bit and 29-bit CAN BUS

DFLX14—Solenoid Valve Test Harness

John Deere Tractors 6415, 6615, 7515 Diagnosis and Tests Service Technical Manual (TM8128)