John Deere WL56 4WD Operation Test Technical Manual TM14283X19

Data Size: 37.33 MB 
File Type: PDF 
Language: English 
Manufacturer: John Deere 
Applicable Machine: Loader 
Document: Operation & Test Technical Manual 
Machine Model: John Deere WL56 4WD Loader 
PIN: 1YNWL56_ _ _ D000326— 
Book Number: TM14283X19 
Publication Date: 2020 
Page: 369 Pages

List Contents:

General Information 
Safety​ 
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 Fluids​ 
Avoid High-Pressure Oils​ 
Work In Ventilated Area​ 
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​ 
Diagnostics 
Engine Control Unit (ECU) Diagnostic Trouble Codes​ 
Engine Control Unit (ECU) Diagnostic Trouble Codes​ 
91.03— Primary Analog Throttle Out of Range High​ 
91.04— Engine Throttle Open or Short​ 
97.03— Water-in-Fuel Signal Out of Range High​ 
97.04— Water-in-Fuel Signal Out of Range Low​ 
97.16— Water-in-Fuel Detected​ 
110.00— Coolant Temperature Signal Extremely High​ 
110.03— Coolant Temperature Signal Out of Range High​ 
110.04— Coolant Temperature Signal Out of Range Low​ 
110.15— Coolant Temperature Signal Slightly High​ 
110.16— Coolant Temperature Signal Moderately High​ 
Operational Checkout Procedure 
Operational Checkout Procedure​ 
Operational Checkout​ 
Engine 
Theory of Operation​ 
John Deere Engine​ 
Cold Start Aid System Theory of Operation—If Equipped​ 
System Diagrams​ 
Engine Fuel System Component Location​ 
Engine Cooling System Component Location​ 
Engine Intake and Exhaust Component Location​ 
Diesel Fired Coolant Heater (A8) Component Location—If Equipped​ 
Diagnostic Information​ 
John Deere Engine​ 
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​ 
Excessive Fuel Consumption​ 
Fuel in Oil​ 
Low Pressure Fuel System Check​ 
Adjustments​ 
John Deere Engine​ 
Tests​ 
John Deere Engine​ 
Electrical System 
Theory of Operation​ 
Start and Charge Circuits Theory of Operation​ 
Controller Area Network (CAN) Circuits Theory of Operation​ 
Engine Control Unit (ECU) Circuits Theory of Operation​ 
Display Unit Circuits Theory of Operation​ 
Transmission Control Unit (TCU) Circuits Theory of Operation​ 
Park Brake Circuit Theory of Operation​ 
JDLink™ Circuit Theory of Operation—IF Equipped​ 
System Diagrams​ 
Electrical Diagram Information​ 
Electrical Schematic Symbols​ 
System Functional Schematic, Wiring Diagram, and Component Location Master Legend​ 
System Functional Schematic​ 
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​ 
Engine Harness (W6) Component Location​ 
Engine Harness (W6) Wiring Diagram​ 
Beacon Light Harness (W8) Component Location—If Equipped​ 
Beacon Light Harness (W8) Wiring Diagram—If Equipped​ 
Rear Frame Harness (W13) Component Location​ 
Rear Frame Harness (W13) Wiring Diagram​ 
License Plate Light Harness (W14) Component Location—If Equipped​ 
License Plate Light Harness (W14) Wiring Diagram—If Equipped​ 
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​ 
Radio Harness (W23) Component Location—If Equipped​ 
Radio Harness (W23) Wiring Diagram—If Equipped​ 
Fuel Injector Harness (W32) Component Location​ 
Fuel Injector Harness (W32) Wiring Diagram​ 
Auxiliary Fuel Filter Harness (W33) Component Location—If Equipped​ 
Auxiliary Fuel Filter Harness (W33) Wiring Diagram—If Equipped​ 
Diesel Fired Coolant Heater Harness (W34) Component Location—If Equipped​ 
Diesel Fired Coolant Heater Harness (W34) Wiring Diagram—If Equipped​ 
JDLink™ Harness (W36) Component Loaction—If Equipped​ 
JDLink™ Harness (W36) Wiring Diagram—If Equipped​ 
Fuse and Relay Specifications​ 
Diagnostic Information​ 
Service ADVISOR™ Diagnostic Application​ 
Service ADVISOR™ Connection Procedure​ 
Reading Diagnostic Trouble Codes with Service ADVISOR™ Diagnostic Application​ 
Intermittent Diagnostic Trouble Code (DTC) Diagnostics​ 
Diagnostic Trouble Codes—After Machine Repair​ 
Electrical Component Specifications​ 
Adjustments​ 
Boom Height Kickout (BHKO) Adjustment​ 
Return-to-Dig Adjustment​ 
Tests​ 
Alternator Test​ 
Transmission Control Valve Solenoid Check​ 
Clutch Cut-Off Sensor Check​ 
Connector Terminal Test​ 
Power Train 
Theory of Operation​ 
TeamMate™ IV Axles​ 
Power Train Operation​ 
Torque Converter 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​ 
Axle Oscillation​ 
Inboard Planetary Axle Operation​ 
Differential Operation​ 
Final Drive—Axle Operation​ 
Service Brake Operation​ 
Park Brake Operation​ 
System Diagrams​ 
Transmission System Schematic—First Forward​ 
Power Train Component Location​ 
Transmission Component Location​ 
Diagnostic Information​ 
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 Oil Level Rises​ 
Differential Oil Level Low​ 
Differential and Axle Noise Excessive​ 
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 Does Not Come On​ 
Park Brake Will Not Apply​ 
Adjustments​ 
Service Brake Bleeding Procedure​ 
External Service Brake Inspection​ 
Service Brake Accumulator​ 
Transmission Sensor Adjustment​ 
Park Brake Adjustment​ 
Tests​ 
Transmission Oil Warm-Up 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​ 
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​ 
Transmission Oil Cooler Thermal Bypass Valve Temperature Test​ 
Transmission Oil Cooler Thermal Bypass Valve Pressure Test​ 
Transmission Oil Cooler Restriction Test​ 
Axle Breather Test​ 
Hydraulic System 
Theory of Operation​ 
Loader Hydraulic System Operation​ 
Loader Hydraulic Pump Operation​ 
Hydraulic Pump Manifold Operation​ 
Steering System Component Operation​ 
Steering Valve Operation​ 
Pilot Pressure Reducing Valve Operation​ 
Service Brake Hydraulic System Operation​ 
Service Brake Accumulators Operation​ 
Service Brake Valve Operation​ 
Pilot Control Lever Operation​ 
Loader Control Valve Operation​ 
Loader Control Valve with Auxiliary Function Operation—If Equipped​ 
Boom Section Operation-Boom Down and Steering​ 
Bucket Section Operation​ 
Auxiliary Section Operation—If Equipped​ 
Main Relief Valve Operation​ 
Circuit Relief With Anticavitation Valve Operation​ 
Anticavitation Valve Operation​ 
Hydraulic Return Filter Operation​ 
System Diagrams​ 
Hydraulic System Schematic​ 
Steering Circuit Component Location​ 
Loader Circuit Component Location​ 
Loader Circuit with Auxiliary Function Component Location—If Equipped​ 
Service Brake and Park Brake Component Location​ 
Hydraulic Pump Manifold (Hydraulic System Component Location)​ 
Diagnostic Information​ 
No Hydraulic Functions​ 
Hydraulic Functions Slow​ 
Loader Hydraulic Pump Noisy​ 
Loader/Steering Hydraulic Pump Noisy​ 
No Steering Function​ 
Boom Float Function Not Working​ 
One Hydraulic Function Not Working​ 
Hydraulic Function Drifts Down​ 
Boom Down Does Not Work (Engine Off)​ 
Oil Overheats​ 
Hydraulic Oil Foams​ 
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​ 
Steering Jerky​ 
Adjustments​ 
Pilot Control Lever Adjustment​ 
Accumulator Precharge​ 
Tests​ 
Hydraulic Oil Sampling Procedure​ 
Hydraulic Oil Warm-Up Procedure​ 
Vacuum Pump Installation​ 
Hydraulic System Pressure and Accumulators Discharge​ 
JT02156A Digital Pressure and Temperature Analyzer Kit Installation​ 
Steering/Loader Hydraulic Pump Flow Test​ 
Loader Hydraulic Pump Flow 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​ 
Orbital Steering Valve Leakage Test​ 
Steering Cylinder Drift Test​ 
Pilot Control Valve Pressure Test​ 
Pilot Pressure Reducing Valve Pressure 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​ 
Hydraulic Oil Filter Inspection Procedure​ 
Heating and Air Conditioning 
Theory of Operation​ 
Air Conditioning System Cycle of Operation​ 
System Diagrams​ 
Air Conditioner and Heater Component Location​ 
Diagnostic Information​ 
Air Conditioning System Does Not Operate​ 
Air Conditioner Does Not Cool Interior of Cab​ 
Air Conditioning Runs Constantly, Too Cold​ 
Heater System Does Not Operate​ 
Heater Does Not Warm Interior of Cab​ 
Interior Windows Continue to Fog​ 
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​ 
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