Complete Operation and Test manual with Electrical Wiring Diagrams for John Deere 4WD Loaders Models 744K with Engines 6090HDW06 (T3), 6090HDW08 (S2) (SN.-632967), with all the shop information to maintain, diagnose, and rebuild like professional mechanics.

John Deere 744K 4WD Loader workshop Diagnostics and Test 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.

TM10682 - John Deere 744K 4WD Loader Technical Manual - Operation and Test.PDF
tm11160 - John Deere Chargeur à transmission quatre roues motrices 744K.pdf
tm11161 - John Deere Cargadora de tracción en las cuatro ruedas 744K.pdf
tm11271 - John Deere Погрузчик 744K с полным приводом (4WD).pdf

PRODUCT DETAILS:
Category: Operation and Test
Total Pages: 2,074 pages
File Format: PDF (bookmarked, ToC, Searchable, Printable, high quality)
Language: English Spanish French Russian
Published on 2020/02/26

MAIN SECTIONS
  Foreword
   Manual Identification-READ THIS FIRST!
   General Information
      Safety Information
   Diagnostic Trouble Codes (DTCs)
      Engine Control Unit (ECU) Diagnostic Trouble Codes
      Transmission Control Unit (TCU) Diagnostic Trouble Codes
      Flex Load Controller (FLC) Diagnostic Trouble Codes
      Sealed Switch Module (SSM) Diagnostic Trouble Codes
      Advanced Display Unit (ADU) Diagnostic Trouble Codes
      Radar Object Detection (ROD) Diagnostic Trouble Codes
      Ground Speed Radar (RDR) Diagnostic Trouble Codes
      Joystick Steering Valve (JSV) Diagnostic Trouble Codes
      Joystick Steering Controller (JSC) Diagnostic Trouble Codes
      Tire Pressure Monitoring (TPM) System Diagnostic Trouble Codes
   Operational Checkout Procedure
      Operational Checkout Procedure
   Engine
      Theory of Operation
      Diagnostic Information
      Tests
   Electrical System
      System Information
      System Diagrams
      Sub-System Diagnostics
      Monitor Operation
      References
   Power Train
      Theory of Operation
      Diagnostic Information
      Adjustments
      Tests
   Hydraulic System
      Theory of Operation
      Diagnostic Information
      Adjustments
      Test
   Heating and Air Conditioning
      Theory of Operation
      Diagnostic Information
      Tests
      
tm10682 - 744K 4WD Loader
Table of Contents
Foreword
Manual Identification—READ THIS FIRST!
Section 9000: General Information
Group 01: Safety Information
Recognize Safety Information
Follow Safety Instructions
Operate Only If Qualified
Wear Protective Equipment
Avoid Unauthorized Machine Modifications
Add Cab Guarding For Special Uses
Inspect Machine
Stay Clear of Moving Parts
Avoid High-Pressure Oils
Avoid High-Pressure Fluids
Beware of Exhaust Fumes
Prevent Fires
Clean Debris from Machine
Prevent Battery Explosions
Handle Chemical Products Safely
Dispose of Waste Properly
Prepare for Emergencies
Use Steps and Handholds Correctly
Start Only From Operator's Seat
Use and Maintain Seat Belt
Prevent Unintended Machine Movement
Avoid Work Site Hazards
Use Special Care When Operating Loader
Keep Riders Off Machine
Avoid Backover Accidents
Avoid Machine Tip Over
Operating on Slopes
Operating or Traveling On Public Roads
Inspect and Maintain ROPS
Add and Operate Attachments Safely
Park And Prepare For Service Safely
Service Cooling System Safely
Service Tires Safely
Remove Paint Before Welding or Heating
Make Welding Repairs Safely
Drive Metal Pins Safely
Section 9001: Diagnostic Trouble Codes (DTCs)
Group 10: Engine Control Unit (ECU) Diagnostic Trouble Codes
Engine Control Unit (ECU) Diagnostic Trouble Codes
000107.00 - Eng Air Filter Restricted
000171.03 - Ambient Air Temperature Out of Range High
000171.04 - Ambient Air Temperature Out of Range Low
000627.01 - ECU Unswitched Power Short to Ground
000676.05 - Engine Heat Open or Short
001253.13 - Injector Cal Required
001321.31 - Starter Solenoid Open Circuit
002003.09 - CAN Communication Lost for TCU
002033.09 - CAN Communication Lost for FLC
003587.05 - Ether Starting Aid Circuit Fault
Group 20: Transmission Control Unit (TCU) Diagnostic Trouble Codes
Transmission Control Unit (TCU) Diagnostic Trouble Codes
000091.09 - Timeout EEC2 Message
000513.02 - Percent Torque Invalid
000513.09 - Timeout EEC1 Message
000514.02 - Friction Invalid
000514.09 - Timeout EEC3 Message
000544.02 - Ref Torque Invalid
000544.09 - Timeout Engine Config Message
000777.02 - TC Clutch Slippage
000777.03 - TC Lockup Sol Short to Power
000777.04 - TC Lockup Sol Short to Gnd
000777.05 - TC Lockup Sol Open Circuit
000928.03 - Axle Disconnect Solenoid Short to Power
000928.04 - Axle Disconnect Solenoid High Current
000928.05 - Axle Disconnect Solenoid Open Circuit
002033.09 - CAN Communication Lost for FLC
002141.09 - CAN Communication Lost for SSM
522344.00 - Torque Converter Output Temperature Too High
522350.15 - Transmission Input Torque Overload
522364.07 - Transmission Clutch Calibration Failed
522364.13 - Transmission Clutch Calibration Fault
522365.13 - Limp Home Mode Requested
522366.13 - Application Invalid
522367.13 - TCU Configuration Invalid
522368.02 - TCU Memory Failure
522369.03 - Remote Display Short to Power
522370.02 - TCU Valve Power Supply 2 Short Circuit
522371.02 - TCU Valve Power Supply 1 Short Circuit
522373.03 - Power Supply High Voltage
522373.04 - Power Supply Low Voltage
522374.03 - Sensor Supply Short to Power
522374.04 - Sensor Supply Short to Ground
522375.00 - Transmission Oil Filter Restricted
522376.00 - Transmission Oil Temperature Over Maximum Value
522379.03 - Park Brake Release Solenoid Short to Power
522379.04 - Park Brake Release Solenoid Short to Ground
522379.05 - Park Brake Release Solenoid Open Circuit
522382.03 - Backup Alarm Short to Power
522382.04 - Backup Alarm Short to Ground
522383.02 - Transmission Clutch KR Slippage
522383.03 - Clutch Reverse Solenoid Short to Power
522383.04 - Clutch Reverse Solenoid Short to Ground
522383.05 - Clutch Reverse Solenoid Open Circuit
522386.02 - Transmission Clutch KV Slippage
522386.03 - Clutch Forward Solenoid Short to Power
522386.04 - Clutch Forward Solenoid Short to Ground
522386.05 - Clutch Forward Solenoid Open Circuit
522389.02 - Transmission Clutch K4 Slippage
522389.03 - Clutch K4 Solenoid Short to Power
522389.04 - Clutch K4 Solenoid Short to Ground
522389.05 - Clutch K4 Solenoid Open Circuit
522392.02 - Transmission Clutch K3 Slippage
522392.03 - Clutch K3 Solenoid Short to Power
522392.04 - Clutch K3 Solenoid Short to Ground
522392.05 - Clutch K3 Solenoid Open Circuit
522395.02 - Transmission Clutch K2 Slippage
522395.03 - Clutch K2 Solenoid Short to Power
522395.04 - Clutch K2 Solenoid Short to Ground
522395.05 - Clutch K2 Solenoid Open Circuit
522399.02 - Transmission Clutch K1 Slippage
522399.03 - Clutch K1 Solenoid Short to Power
522399.04 - Clutch K1 Solenoid Short to Ground
522399.05 - Clutch K1 Solenoid Open Circuit
522401.02 - Output Shaft Speed Sensor Fault
522401.03 - Output Shaft Speed Sensor Open or Short
522401.04 - Output Shaft Speed Sensor Short to Ground
522401.12 - Output Shaft Speed Sensor Fault
522401.15 - Output Shaft Speed Sensor Overspeed
522402.03 - Clutch Speed Sensor Open or Short
522402.04 - Clutch Speed Sensor Short to Ground
522402.12 - Clutch Speed Sensor Fault
522403.03 - Converter Output Speed Sensor Open or Short
522403.04 - Converter Output Speed Sensor Short to Ground
522403.12 - Converter Output Speed Sensor Fault
522404.03 - Converter Input Speed Sensor Open or Short
522404.04 - Converter Input Speed Sensor Short to Ground
522404.12 - Converter Input Speed Sensor Fault
522406.03 - Transmission Oil Temperature Sensor Open or Short
522406.04 - Transmission Oil Temperature Sensor Short to Ground
522407.03 - Clutch Cut-off Sensor Short to Power
522407.04 - Clutch Cut-off Sensor Open or Short
522409.05 - 2nd FNR Open Circuit
522409.12 - 2nd FNR Multiple Inputs
522411.05 - 1st FNR Open Circuit
522411.12 - 1st FNR Multiple Inputs
522412.12 - Gear Selection Error
522419.02 - Clutch Cut-off Disabled
522420.02 - Manual Downshift Disabled
522421.02 - Auto to 1st Disabled
524048.00 - Transmission Output Torque Exceeded
524049.00 - Transmission Input Torque Exceeded
524287.00 - Configure Machine Model
Group 30: Flex Load Controller (FLC) Diagnostic Trouble Codes
Flex Load Controller (FLC) Diagnostic Trouble Codes
000096.04 - Fuel Level Short to Ground
000096.05 - Fuel Level Open or Short
000167.16 - Alternator High Voltage
000167.18 - Alternator Low Voltage
000168.16 - High Battery Voltage
000234.02 - Invalid TCU Software Rev
000444.05 - 12 Volt Center Tap Open or Short
000444.18 - Battery Voltage Imbalance
000521.00 - Brake Pedal High Voltage
000628.12 - Controller Not Programmed
000629.12 - FLC Watchdog Time Out
000639.12 - FLC CAN Failure
000639.14 - FLC CAN Bus Off
000746.05 - Differential Lock Solenoid Open or Short
000746.06 - Differential Lock Solenoid High Current
000785.05 - Pilot Solenoid Open or Short
000785.06 - Pilot Solenoid High Current
000880.06 - Brake Lights High Current
000977.05 - Reverse Fan Solenoid Open or Short
000977.06 - Reverse Fan Solenoid High Current
001069.02 - Tire Size Incorrect
001071.05 - Fan Speed Solenoid Open or Short
001071.06 - Fan Speed Solenoid High Current
001503.04 - Arm Rest Down Switch Short to Ground
001503.11 - Arm Rest Position Undetermined
001550.06 - AC Clutch High Current
001565.04 - Arm Rest Up Switch Short to Ground
001638.00 - Hydraulic Oil High Temperature
001638.04 - Hydraulic Oil Temperature Sensor Short to Ground
001713.01 - Hydraulic Oil Filter Restricted
001762.03 - Hydraulic Pressure Sensor Short to Power
001762.04 - Hydraulic Pressure Sensor Open or Short
002000.09 - CAN Communication Lost for ECU
002003.09 - CAN Communication Lost for TCU
002040.09 - CAN Communication Lost for ADU
002051.09 - CAN Communication Lost for TPM
002052.09 - CAN Communication Lost for JSC
002129.09 - CAN Communication Lost for JSV
002132.09 - CAN Communication Lost for ROD
002141.09 - CAN Communication Lost for SSM
002169.09 - CAN Communication Lost for RDR
002350.05 - Drive Lamps Open or Short
002350.06 - Drive Lamps High Current
002355.05 - Front Work Lights Open or Short
002355.06 - Front Work Lights High Current
002356.05 - Front Work Lights Open or Short
002356.06 - Front Work Lights High Current
002359.05 - Machine Work Lights Open or Short
002359.06 - Machine Work Lights High Current
002362.05 - Rear Work Lights Open or Short
002362.06 - Rear Work Lights High Current
002367.04 - Left Turn Switch Short to Ground
002368.05 - Left Turn Lights Open or Short
002368.06 - Left Turn Lights High Current
002369.04 - Right Turn Switch Short to Ground
002370.05 - Right Turn Lights Open or Short
002370.06 - Right Turn Lights High Current
002378.06 - Marker/Tail Lights High Current
002386.06 - Beacon Light High Current
002680.05 - RTC/Float Detent Open or Short
002680.06 - RTC/Float Detent High Current
002697.02 - Timeout JSC Message
002717.05 - RTD Detent Open or Short
002717.06 - RTD Detent High Current
002754.05 - BHKO Detent Open or Short
002754.06 - BHKO Detent High Current
002875.04 - Hazard Wakeup Short to Ground
003509.04 - FLC Sensor 1 Voltage Low
003510.04 - FLC Sensor 2 Voltage Low
003511.04 - FLC Sensor 3 Voltage Low
299621.02 - Machine Configuration Invalid
522280.01 - Brake Pressure Low
522341.05 - Heated Mirror Open or Short
522341.06 - Heated Mirror Short to Ground
522426.04 - Rear Wiper Park Short to Ground
522427.04 - Front Wiper Park Short to Ground
522431.02 - Memory Test Failure
522432.06 - Rear Wiper High Speed High Current
522433.05 - Rear Wiper Low Speed Open or Short
522433.06 - Rear Wiper Low Speed High Current
522434.05 - Front Wiper Low Speed Open or Short
522434.06 - Front Wiper Low Speed High Current
522435.06 - Front Wiper High Speed High Current
522436.03 - Bucket Position Short to Power
522436.04 - Bucket Position Open or Short
522437.04 - Return-to-Dig Switch Short to Ground
522438.05 - Pin Disconnect Solenoid Open or Short
522438.06 - Pin Disconnect Solenoid High Current
522543.03 - Boom Cyl Rod Press Open or Short
522543.04 - Boom Cyl Rod Press Short to Ground
522544.03 - Boom Cyl Head Press Open or Short
522544.04 - Boom Cyl Head Press Short to Ground
522796.05 - Rear Washer Pump Open or Short
522796.06 - Rear Washer Pump High Current
522797.05 - Front Washer Pump Open or Short
522797.06 - Front Washer Pump High Current
523137.01 - Steering Pressure Low
523137.04 - Steering Pressure Switch Short to Ground
523219.04 - Switched Power Voltage Low
523440.04 - Unswitched Power Voltage Low
523489.05 - Engine Light Open Circuit
523577.05 - Secondary Steering Pump Open or Short
523577.06 - Secondary Steering Pump High Current
523689.04 - Differential Lock Switch Short to Ground
523767.04 - Joystick Steering Activation Switch Short to Ground
523767.10 - Joystick Steering Activation Switch Button Stuck
523786.03 - Boom Position Sensor Short to Power
523795.05 - JSV Power Open or Short
523795.06 - JSV Power High Current
523837.01 - Brake Pressure Low—Rear
523837.03 - Rear Brake Pressure Sensor Short to Power
523837.04 - Rear Brake Pressure Open or Short
523840.01 - Brake Pressure Low—Front
523840.03 - Front Brake Pressure Short to Power
523840.04 - Front Brake Pressure Open or Short
523865.04 - Add Truck Switch Short to Ground
523867.04 - Counter Switch Short to Ground
523868.04 - Add Bucket Switch Short to Ground
523911.05 - Hydraulic Power Management Solenoid Open or Short
523911.06 - Hydraulic Power Management Solenoid High Current
523911.13 - Hydraulic Power Management System Out of Calibration
523948.05 - Ride Control Solenoid Open Circuit
523948.06 - Ride Control Solenoid High Current
524044.01 - Axle Oil Filter Restricted
524044.03 - Axle Oil Filter Short to Power
524250.31 - Inspect Park Brake
524265.19 - Check Sum Error
Group 40: Sealed Switch Module (SSM) Diagnostic Trouble Codes
Sealed Switch Module (SSM) Diagnostic Trouble Codes
000629.12 - SSM Watchdog Time Out
002033.09 - SSM Lost Communications
002634.04 - SSM Ignition Relay Signal Short to Ground
002634.05 - SSM Ignition Relay Signal Open Circuit
520752.04 - Button 17 Keypad Stuck
520752.09 - Button 17 LED Message
520753.04 - Front Washer Keypad Stuck
520754.04 - Front Wiper Keypad Stuck
520754.09 - Lost Front Wiper LED Message
520755.04 - Drive Lights Keypad Stuck
520755.09 - Lost Drive Lights LED Message
523335.04 - Work Lights Keypad Stuck
523335.09 - Lost Work Lights LED Message
523336.04 - Rear Wiper Keypad Stuck
523336.09 - Lost Rear Wiper LED Message
523338.04 - Rear Washer Keypad Stuck
523339.04 - Axle Disconnect Keypad Stuck
523339.09 - Lost Axle Disconnect LED Message
523340.04 - Button 21 Keypad Stuck
523340.09 - Button 21 LED Message
523849.04 - A/C Keypad Stuck
523349.09 - Lost A/C LED Message
523850.04 - Pin Disconnect Keypad Stuck
523850.09 - Lost Pin Disconnect LED Message
523852.04 - Spin Control Keypad Stuck
523852.09 - Lost Spin Control LED Message
523854.04 - Diff Lock Keypad Stuck
523854.09 - Lost Diff Lock LED Message
523855.04 - RTCarry Keypad Stuck
523855.09 - Lost RTC LED Message
523856.04 - BHKO Keypad Stuck
523856.09 - Lost BHKO LED Message
523857.04 - Clutch Cut-off Keypad Stuck
523857.09 - Lost Clutch Cut-off LED Message
523858.04 - Ride Control Keypad Stuck
523858.09 - Lost Ride Control LED Message
523860.04 - Auto Transmission Keypad Stuck
523860.09 - Lost Auto Trans LED Message
523861.04 - Return to Dig Keypad Stuck
523861.09 - Lost RTD LED Message
523862.04 - Park Brake Keypad Stuck
523862.09 - Lost Park Brake LED Message
523863.04 - Pilot Enable Keypad Stuck
523863.09 - Lost Pilot Enable LED Message
523864.04 - Hazards Keypad Stuck
523864.09 - Lost Hazard LED Message
523865.04 - Beacon Light Keypad Stuck
523865.09 - Lost Beacon LED Message
523867.04 - Ignition Off Keypad Stuck
523868.04 - Ignition On Keypad Stuck
523868.09 - Lost Ign On LED Message
Group 50: Advanced Display Unit (ADU) Diagnostic Trouble Codes
Advanced Display Unit (ADU) Diagnostic Trouble Codes
000158.03 - Switched Power Voltage High
000158.04 - Switched Power Voltage Low
000168.03 - High Battery Voltage
000168.04 - Low Battery Voltage
000442.00 - Display Temp High
000442.01 - Display Temp Low
001491.11 - LCD Backlight Failure
003597.02 - 5 Volt Power Supply Invalid
003598.02 - 1.5 Volt Power Supply Invalid
003599.02 - 3.3 Volt Power Supply Invalid
523436.14 - ADU Watchdog Time Out
523438.31 - Memory Error
523651.02 - Memory Stack Overflow
523773.03 - CAN HIGH Voltage High
523773.04 - CAN HIGH Voltage Low
523774.03 - CAN LOW Voltage High
523774.04 - CAN LOW Voltage Low
524076.10 - Information Button Stuck
524077.10 - Back Key Button Stuck
524078.10 - Menu Select Button Stuck
524080.10 - Down Arrow Button Stuck
524082.10 - Up Arrow Button Stuck
Group 60: Radar Object Detection (ROD) Diagnostic Trouble Codes
Radar Object Detection (ROD) Diagnostic Trouble Codes
000896.12 - ROD Unit Failure
Group 70: Ground Speed Radar (RDR) Diagnostic Trouble Codes
Ground Speed Radar (RDR) Diagnostic Trouble Codes
000628.12 - Controller Not Programmed
523456.18 - Degraded Mode
Group 80: Joystick Steering Valve (JSV) Diagnostic Trouble Codes
Joystick Steering Valve (JSV) Diagnostic Trouble Codes
000627.03 - Power Supply Voltage High
000627.04 - Power Supply Voltage Low
000628.12 - Memory Error
000630.12 - Memory Error
000638.12 - Memory Error
298965.12 - Control ASIC
298970.02 - Invalid Option
298971.02 - Invalid Valve State
298972.02 - Invalid Valve State
298973.02 - Port Flow Greater Than 100%
298974.02 - Port Flow Error Float
298975.02 - Port Flow Error Block
298976.02 - Invert Port Error
298977.02 - Shape Error
298978.02 - Invalid Slope Command
298979.02 - Dead Band Error
298980.02 - Invalid Float Command
298981.02 - Invalid Ramps Command
298982.02 - Invalid Scale Command
298983.02 - Flow Command Error
298984.02 - CAN ID Invalid
298985.19 - CAN Communication Lost for FLC
298986.07 - Spool Fail Float Position
298987.07 - Spool Position Wrong Direction
298988.07 - Spool Position Greater Than Reference
298989.07 - Spool Not at Neutral
298990.07 - Spool Float Position Error
298991.07 - Main Spool Stuck
298992.11 - Self Test Failure
298993.11 - Component Failure
298994.11 - Memory Error
298994.12 - LVDT Wiring Error
298995.11 - Memory Test Failure
298998.13 - Invalid Mechanical Spool Values
298999.13 - Memory Error
299001.12 - Memory Error
299002.11 - Software Error
299003.11 - Software Error
299004.11 - Software Error
299006.12 - Software Error
299007.12 - Memory Test Failure
Group 90: Joystick Steering Controller (JSC) Diagnostic Trouble Codes
Joystick Steering Controller (JSC) Diagnostic Trouble Codes
002697.03 - Joystick Position Sensor Voltage Above Normal
002697.04 - Joystick Position Sensor Voltage Below Normal
002697.13 - Joystick Out of Calibration
002697.14 - Joystick Redundant Sensor Failure
Group 100: Tire Pressure Monitoring (TPM) System Diagnostic Trouble Codes
000108.12 - Ambient Pressure Fault
000241.01 - Second Level Alarm Low Pressure
000241.16 - First Level Alarm High Pressure
000241.18 - First Level Alarm Low Pressure
000242.16 - Tire High Temperature
000929.12 - Sensor Fault
000929.31 - Memory Error
001697.04 - TPM Sensor Low Battery
Section 9005: Operational Checkout Procedure
Group 10: Operational Checkout Procedure
Operational Checkout
Section 9010: Engine
Group 05: Theory of Operation
PowerTech Plus™ 9.0L (6090) John Deere Engine—9.0L Tier 3/Stage IIIA
PowerTech Plus™ 9.0L (6090) John Deere Engine—9.0L Stage II
Cold Start Aid System Theory of Operation—If Equipped
Fast Fill Fuel System Theory of Operation
Group 15: Diagnostic Information
Engine Identification
PowerTech Plus™ 9.0L (6090) John Deere Engine—9.0L Tier 3/Stage IIIA
PowerTech Plus™ 9.0L (6090) John Deere Engine—9.0L Stage II
Engine Cranks/Will Not Start
Engine Misfires/Runs Irregularly
Engine Does Not Develop Full Power
Engine Emits Excessive White Exhaust Smoke
Engine Emits Excessive Black or Gray Exhaust Smoke
Engine Will Not Crank
Engine Idles Poorly
Abnormal Engine Noise
Low Pressure Fuel System Check
Excessive Fuel Consumption
Fuel in Oil
Engine Cooling System Component Location
Engine Fuel System Component Location
Engine Intake and Exhaust Component Location
Fast Fill Fuel System Underfill
Fast Fill Fuel System Overfill
Fast Fill Fuel System Nozzle Leaks at Receiver
Group 25: Tests
PowerTech Plus™ 9.0L (6090) John Deere Engine—9.0L Tier 3/Stage IIIA
PowerTech Plus™ 9.0L (6090) John Deere Engine—9.0L Stage II
Fluid Sampling Procedure—If Equipped
Intake Manifold Pressure Test—Turbocharger Boost—9.0L Stage II
Engine Idle Speeds and Auto Shutdown Check
Engine Slow Idle Speed Adjustment
Section 9015: Electrical System
Group 05: System Information
Electrical Diagram Information
Electrical Schematic Symbols
Group 10: System Diagrams
Fuse and Relay Specifications
System Functional Schematic, Wiring Diagram, and Component Location Master Legend
System Functional Schematic and Section Legend
JDLink™ System Functional Schematic—MIG/GTT
JDLink™ System Functional Schematic—MTG/SAT
Power and Ground Cables (W1) Component Location
Loader Frame Harness (W2) Component Location
Loader Frame Harness (W2) Wiring Diagram
Load Center Harness (W3) Component Location
Load Center Harness (W3) Wiring Diagram
Front Console Harness (W4) Component Location
Front Console Harness (W4) Wiring Diagram (S.N. —635782)
Front Console Harness (W4) Wiring Diagram (S.N. 635783— )
Engine Frame Harness (W5) Component Location
Engine Frame Harness (W5) Wiring Diagram
Engine Harness (W6) Component Location
Engine Harness (W6) Wiring Diagram
Beacon Light Harness (W8) Component Location
Beacon Light Harness (W8) Wiring Diagram
Transmission Harness (W10) Component Location
Transmission Harness (W10) Wiring Diagram
Rear Frame Harness (W13) Component Location
Rear Frame Harness (W13) Wiring Diagram
License Plate Light and Backup Light Harness (W14) Component Location
License Plate Light and Backup Light Harness (W14) Wiring Diagram
Secondary Steering Harness (W17) Component Location—If Equipped
Secondary Steering Harness (W17) Wiring Diagram
Cab Roof Harness (W19) Component Location
Cab Roof Harness (W19) Wiring Diagram
Heater and Air Conditioner Harness (W20) Component Location
Heater and Air Conditioner Harness (W20) Wiring Diagram
Radar Object Detection Harness (W21) Component Location
Radar Object Detection Harness (W21) Wiring Diagram
Joystick Steering Harness (W22) Component Location—If Equipped
Joystick Steering Harness (W22) Wiring Diagram—If Equipped
Radio Harness (W23) Component Location
Radio Harness (W23) Wiring Diagram
JDLink™ System Harnesses Component Location—MIG/GTT
JDLink™ System Harnesses Component Location—MTG/SAT
JDLink™ System Wiring Diagrams—MIG/GTT
JDLink™ System Wiring Diagrams—MTG/SAT
Tire Pressure Monitoring (TPM) System Harness (W35) Component Location
Tire Pressure Monitoring (TPM) System Harness (W35) Wiring Diagram
Group 15: Sub-System Diagnostics
Start and Charge Circuits Theory of Operation
Controller Area Network (CAN) Circuit Theory of Operation
Engine Control Unit (ECU) Circuit Theory of Operation
Flex Load Controller (FLC) Circuit Theory of Operation
Transmission Control Unit (TCU) Circuit Theory of Operation
Park Brake Circuit Theory of Operation
Advanced Display Unit (ADU) Circuit Theory of Operation
Joystick Steering Circuit Theory of Operation—If Equipped
Radar Object Detection (ROD) Circuit Theory of Operation—If Equipped
Auto-Differential Lock Circuit Theory of Operation—If Equipped
Embedded Payload Scale (EPS) Circuit Theory of Operation
Tire Pressure Monitoring (TPM) System Theory of Operation
Group 16: Monitor Operation
Advanced Display Unit (ADU)—Service Mode
Advanced Display Unit (ADU)—Clear Codes
Advanced Display Unit (ADU)—Auto Idle
Advanced Display Unit (ADU)—Auto Shutdown
Advanced Display Unit (ADU)—Enable Options
Advanced Display Unit (ADU)—Tire Size
Advanced Display Unit (ADU)—Fan Speed
Advanced Display Unit (ADU)—Maximum High Gear
Advanced Display Unit (ADU)—Transmission Clutch Calibration
Advanced Display Unit (ADU)—Hydraulic Power Management (HPM) Calibration
Advanced Display Unit (ADU)—Slow Idle Adjust
Advanced Display Unit (ADU)—Hide/Unhide Main Menu
Group 20: References
Electrical Component Specifications
Service ADVISOR™ Diagnostic Application
Service ADVISOR™ Connection Procedure
Reading Diagnostic Trouble Codes with Service ADVISOR™ Diagnostic Application
Diagnostic Trouble Codes—After Machine Repair
JDLink™ System Identification
JDLink™ Connection Procedure—If Equipped
CAN Circuit Test
Alternator Test
Hydraulic Power Management (HPM) Calibration
Transmission Control Valve Solenoid Check
Clutch Cut-Off Sensor Check
Boom Height Kickout (BHKO) Adjustment
Return-to-Carry (RTC) Adjustment
Return-to-Dig Adjustment
Boom Height Kickout/Return-to-Carry (BHKO/RTC) Position Sensor Remove and Install
Boom Height Kickout/Return-to-Carry (BHKO/RTC) Position Sensor Disassemble and Assemble
Boom Height Kickout/Return-to-Carry (BHKO/RTC) Position Sensor Calibration
Embedded Payload Scale (EPS) Diagnostics
Change Backup Alarm Volume
Hydraulic Pressure Sensor Test
Pressure Switches and Sensors Remove and Install
Intermittent Diagnostic Trouble Code (DTC) Diagnostics
Connector Terminal Test
Replace Metri-Pack® (Push Type) Connectors
Replace Metri-Pack® Connectors
Replace DEUTSCH® Circular Connectors
Replace DEUTSCH® Rectangular or Triangular Connectors
Install DEUTSCH® Contact
Replace WEATHER PACK® Connector
Install WEATHER PACK® Contact
Replace CINCH™ Connectors
Install CINCH™ Contact
Repair 32 and 48 Way CINCH™ Connectors
Remove Connector Body from Blade Terminals
Engine Control Unit (ECU) Remove and Install
Flex Load Controller (FLC) Remove and Install
Transmission Control Unit (TCU) Remove and Install
Transmission Control Unit (TCU) Remove and Install
Sealed Switch Module (SSM) Remove and Install
Advanced Display Unit (ADU) Remove and Install
TPM—Activating Tire Pressure Monitoring System
TPM—Programming Sensors with SmartWave® Advanced Maintenance Tool
TPM—Programming Using Sensor Identification Numbers
TPM—Cold Inflation Pressure Setup
TPM—Alarm Setup
TPM—Delete Sensors
TPM—SmartWave® Advanced Maintenance Tool Diagnostics
TPM—Tire Pressure Sensor Remove and Install
Section 9020: Power Train
Group 05: Theory of Operation
TeamMate™ Axles
Power Train Operation
Standard Torque Converter Operation
Torque Converter With Lockup Clutch Operation
Transmission Operation
Transmission Operation—First Gear Forward
Transmission Clutch Pack Engagement and Solenoids Activated
Clutch Pack Operation
Transmission Hydraulic System
Transmission Control Valve Component Operation
Transmission Clutch Modulation Operation
Thermal Bypass Valve Operation
Standard Differential Operation
Differential Lock Operation
Axle Circulation Dual Pump Operation
Park Brake Operation
Group 15: Diagnostic Information
Transmission System Schematic—First Forward
Transmission System Schematic—First Forward Lockup Torque Converter
Transmission Control System
Power Train Component Location
Transmission Component Location
Transmission Clutch Slippage
Machine Will Not Move in Either Direction
Machine Will Not Shift Correctly
Transmission System Pressure Is Low in Neutral
Transmission Pressure Is Low (One or Two Gear Ranges)
Transmission Shifts Too Slow
Transmission Shifts Too Fast
Machine Creeps in Neutral
Transmission Hydraulic System Overheats
Transmission Excessive Noise
Oil Aerated
Oil Ejected from Filler Tube
Machine Vibrates
Machine Power and Acceleration Low
Torque Converter Stall RPM
Differential Lock Will Not Engage
Differential Lock Slips and Chatters
Differential Lock Will Not Disengage
Differential Oil Level Rises
Differential Oil Level Low
Differential and Axle Noise Excessive
Axle Wheel Hub Face Seal Leaking
Axle Overheats
Service Brakes Poor or Do Not Apply
Service Brakes Aggressive
Service Brakes Dragging
Service Brakes Lock Up
Service Brakes Chatter
Service Brake Warning Light On
Driveline Excessive Vibration or Noise
Park Brake Will Not Hold
Park Brake Will Not Release
Park Brake Overheats
Park Brake Light Flashes When Shifting From Forward to Reverse
Park Brake Light Flashes During Each Shift
Park Brake Light Does Not Come On
Park Brake Will Not Apply
Group 20: Adjustments
External Service Brake Inspection
Service Brake Bleeding Procedure
Transmission Speed Sensor Adjustment
Transmission Control Unit (TCU)—Electronic Clutch Calibration
Group 25: Tests
Transmission Oil Sampling Procedure
Transmission Oil Warmup Procedure
Park Brake Pressure Test
Park Brake Drag Test
Transmission Pump Flow Test
Transmission System Pressure Test
Transmission Clutch Pressure Test
Transmission Element Leakage Test
Transmission Lube Pressure Test
Differential Lock Pressure Test
Differential Lock Leakage Test
Torque Converter—In Pressure Test
Torque Converter—Out Pressure Test
Torque Converter Relief Pressure Test
Torque Converter—Out Flow Test
Torque Converter Stall Speed Test
Lockup Torque Converter (LUTC) Pressure Test
Transmission Oil Cooler Thermal Bypass Valve Temperature Test
Transmission Oil Cooler Thermal Bypass Valve Pressure Test
Transmission Oil Cooler Restriction Test
Axle Circulation Dual Pump Flow Test
Axle Breather Test
Section 9025: Hydraulic System
Group 05: Theory of Operation
Loader Hydraulic System Operation
Steering/Loader and Loader Hydraulic Pumps Operation
Hydraulic Pump Manifold Operation
Hydraulic Fan Pump Operation
Hydraulic Fan Operation
Hydraulic Reversing Fan Operation—If Equipped
Orbital Steering System Component Operation
Orbital Steering Valve Operation
Joystick Steering Valve Operation—If Equipped
Secondary Steering System Operation—If Equipped
Secondary Steering Valve Operation—If Equipped
Pilot Pressure Reducing Valve Operation
Service Brake Hydraulic System Operation
Service Brake Accumulator Operation
Service Brake Valve Operation
Pin Disconnect Operation
Pilot Control Lever Operation
Control Valve Pilot Orifice Check Valve Operation
Loader Control Valve Operation
Boom Section Operation—Boom Down
Bucket Section Operation—Bucket Rollback
Auxiliary Section—Operating
Loader Control Valve—Load Sense Circuit
Main Relief Valve Operation
Load Sense Relief Valve Operation
Circuit Relief With Anticavitation Valve Operation
Anticavitation Valve Operation
Hydraulic Return Filter Operation
Ride Control Operation—If Equipped
Group 15: Diagnostic Information
Hydraulic System Schematic
Hydraulic System Component Location
No Hydraulic Functions
Hydraulic Functions Slow
Loader or Steering/Loader Hydraulic Pump Noisy
No Orbital Steering Function
Boom Float Function Not Working
One Hydraulic Function Not Working
Hydraulic Function Drifts Down
Boom Down Does Not Work (Engine Off)
Ride Control Not Working
Oil Overheats
Hydraulic Oil Foams
Pin Disconnect Cylinders Will Not Retract
Constant Steering Required to Maintain Straight Travel
Slow Steering Wheel Movement Will Not Cause Frame Movement
Steering Wheel Turns Without Resistance and Causes No Frame Movement
Steering Erratic
Steering Wheel Free Play
Orbital Steering Valve Binds or Locks Up
Steering Wheel Turns by Itself
Machine Turns in Opposite Direction as Steering Wheel
Steering Wheel Kickback
Orbital Steering Jerky
No Joystick Steering Function—If Equipped
Secondary Steering Motor Will Not Operate—If Equipped
Secondary Steering Pump Runs But Will Not Steer Machine—If Equipped
Hydraulic Fan Does Not Reach Full Speed
Hydraulic Fan Runs at Full Speed Only
Hydraulic Fan Does Not Spin
Hydraulic Fan Will Not Reverse Direction—If Equipped
Group 20: Adjustments
Hydraulic Oil Cleanup Procedure Using Portable Filter Caddy
Pilot Control Lever Adjustment
Auxiliary Pilot Control Lever Adjustment
Ride Control Accumulator Gas Charge Procedure
Ride Control Accumulator Draining Procedure
Group 25: Test
Hydraulic Oil Sampling Procedure
Hydraulic Oil Warmup Procedure
Hydraulic System Pressure and Accumulators Discharge
JT02156A Digital Pressure and Temperature Analyzer Kit Installation
Hydraulic System Operating and Standby Pressure Test
Loader Hydraulic Pump Control and Steering/Loader Hydraulic Pump Control Test and Adjustment
Steering/Loader Hydraulic Pump Flow Test
Loader Hydraulic Pump Flow Test
Steering/Loader Hydraulic Pump Case Drain Test
Loader Hydraulic Pump Case Drain Test
Main Relief Valve Pressure Test
Circuit Relief With Anticavitation Valve Pressure Test
Loader Cylinder Drift Test
Boom, Bucket, and Steering Cylinder Leakage Test
Hydraulic Oil Cooler Restriction Test
Steering Cylinder Drift Test
Joystick Steering Valve Pressure Test—If Equipped
Joystick Steering Circuit Relief Valve Pressure Test—If Equipped
Secondary Steering Pump Pressure Relief Valve Test—If Equipped
Secondary Steering Valve—Hydraulic System Isolation Check Valve Leakage Test—If Equipped
Secondary Steering Valve—Secondary Steering Pump Isolation Check Valve Leakage Test—If Equipped
Pilot Control Valve Pressure Test
Auxiliary Pilot Control Valve Pressure Test
Pilot Pressure Reducing Valve Pressure Test
Pilot Accumulator Gas Precharge Test
Cycle Time Test
Service Brake Accumulator Gas Precharge and Low Brake Pressure Warning Test
Service Brake Valve Pressure Test
Service Brake Valve Leakage Test
Service Brake Accumulator Inlet Check Valve Leakage Test
Pin Disconnect Pressure Test—If Equipped
Hydraulic Fan Pump Control Test and Adjustment
Hydraulic Fan Motor Speed Test
Hydraulic Fan Pump Flow Test
Hydraulic Fan Pump Case Drain Test
Hydraulic Fan Motor Case Drain Test
Hydraulic Reversing Fan Test—If Equipped
Hydraulic Oil Filter Inspection Procedure
Section 9031: Heating and Air Conditioning
Group 05: Theory of Operation
Air Conditioning System Cycle of Operation
Group 15: Diagnostic Information
Air Conditioner and Heater Component Location
Air Conditioning System Does Not Operate
Air Conditioner Does Not Cool Interior of Cab
Air Conditioner Runs Constantly, Too Cold
Heating System Does Not Operate
Heater Does Not Warm Interior of Cab
Interior Windows Continue to Fog
Group 25: Tests
Refrigerant Cautions and Proper Handling
R134a Refrigerant Cautions
R134a Oil Charge Capacity
R134a Refrigerant Charge Capacity
Refrigerant Hoses and Tubing Inspection
R134a Air Conditioning System Test
Operating Pressure Diagnostic Chart
Air Conditioning High/Low Pressure Switch Test
Freeze Control Switch Test
Refrigerant Leak Testing

John Deere 4WD Loaders 744K Operation and Test Service Manual (TM10682)