John Deere 644L 4WD Loader Operator’s Manual OMT426945X19 – PDF DOWNLOAD
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John Deere 644L 4WD Loader Operator’s Manual OMT426945X19 – PDF DOWNLOAD
Description
John Deere 644L 4WD Loader Operator’s Manual OMT426945X19 – PDF DOWNLOAD
- Part Number (P/N): OMT426945X19_04
- Language: English
- Division: Construction
- Product Lines: Loaders
- Publication Type: Operator’s Manuals
- Associated Model: 644L
- Serial Number Range: 1DW644L_ _ _L705208—

TABLE OF CONTENTS:
John Deere 644L 4WD Loader Operator’s Manual OMT426945X19 – PDF DOWNLOAD
Contents 27
Safety-Safety and Operator Conveniences 31
Safety and Operator Convenience Features 31
Safety—General Precautions 33
Information for European Union Directives and Eurasian Economic Union Technical Regulations Compliance 33
Recognize Safety Information 34
Follow Safety Instructions 35
Operate Only If Qualified 35
Wear Protective Equipment 35
Protect Against Noise 36
Avoid Unauthorized Machine Modifications 36
Inspect Machine 36
Stay Clear of Moving Parts 36
Avoid High-Pressure Fluids 37
Avoid High-Pressure Oils 37
Work In Ventilated Area 37
Avoid Static Electricity Risk When Refueling 38
High Debris Applications 38
Prevent Fires, Clean Debris From Machine 39
In Case of Machine Fire 39
Prevent Battery Explosions 40
Handle Chemical Products Safely 40
Handle Starting Fluid Safely 40
Decommissioning — Proper Recycling and Disposal of Fluids and Components 41
Exhaust Filter Ash Handling and Disposal 41
Prepare for Emergencies 41
Clean Debris from Machine 42
Add Cab Guarding for Special Uses 42
Safety—Operating Precautions 43
Use Steps and Handholds Correctly 43
Start Only From Operator’s Seat 43
Use and Maintain Seat Belt 43
Heated and Ventilated Operator’s Seat 44
Prevent Unintended Machine Movement 44
Avoid Work Site Hazards 45
Keep Riders Off Machine 46
Avoid Backover Accidents 46
Avoid Machine Tip Over and Machine Damage 47
Avoid Power Lines 47
Use Special Care When Operating Loader 48
Operating on Slopes 48
Operating or Traveling On Public Roads 48
Inspect and Maintain ROPS 49
Travel Safely 49
Prevent Acid Burns 50
Add and Operate Attachments Safely 50
Safety—Maintenance Precautions 51
Park and Prepare for Service Safely 51
Service Machines Safely 51
Service Cooling System Safely 52
Service Accumulator Systems Safely 52
Remove Paint Before Welding or Heating 52
Make Welding Repairs Safely 53
Drive Metal Pins Safely 53
Service Tires Safely 54
Use Proper Lifting Equipment 54
Clean Exhaust Filter Safely 55
Safety—Safety Signs and Other Instructions 56
Safety Signs and Other Instructions 56
Operation—Operator’s Station 64
Levers—Two Function Hydraulic Control 64
Levers—Three Function Hydraulic Control 65
Levers—Four Function Hydraulic Control 66
Steering Control 66
Pedals 67
Sealed Switch Module (SSM) Functions 68
Primary Display Unit (PDU) Functions 73
Horn Button 81
Turn Signals 81
Joystick Steering Armrest Adjustment—If Equipped 82
Dome Light 82
Air Conditioner and Heater Operation 83
Counter Switch—If Equipped 84
Radio—If Equipped 85
Auxiliary Power Supply 89
Opening and Securing Side Door 90
Opening Side Window (Alternative Exit) 91
Seat Adjustment 92
Fire Extinguisher Mounting Location 94
Operation—Operating the Machine 95
Before Starting Work 95
Inspect Machine Daily Before Starting 96
Check Instruments Before Starting 97
Security System 98
Battery Disconnect Switch 98
Engine Break-In Period 99
Starting the Engine 100
Cold Start Aid—Block Heater—If Equipped 102
Cold Start Aid—Glow Plug 102
Cold Weather Warm-Up 103
Required Machine Stop Warning 103
Park Brake Switch 105
Shifting the Transmission 106
Automatic Idle and Automatic Shutdown 108
Operating in Water and Mud 108
Driving Up a Steep or Slippery Slope 108
Turbocharger Cool Down 109
Stopping the Engine 109
Joystick Bucket and Boom Control 110
Two Lever Bucket and Boom Control 112
Auxiliary Control 113
Ride Control—If Equipped 114
Secondary Steering—If Equipped 116
Differential Lock Operation 117
Throttle Lock—If Equipped 119
Service ADVISOR™ Remote (SAR) Software Delivery Process 120
Exhaust Filter 121
Selective Catalytic Reduction (SCR) System Overview 123
US EPA Qualified Emergency Use — SCR Derate Override Option 125
EU Qualified Emergency Use — SCR Derate Override Option 126
Rear Camera and Radar Object Detection (ROD) System—If Equipped 127
Counter Switch Operation—If Equipped 130
Embedded Payload Scale—If Equipped 131
Boom Height Kickout Adjustment 135
Return-to-Carry Adjustment 135
Return-to-Dig Adjustment 136
Operating Loader Coupler—If Equipped 136
Using the Loader Bucket 137
Backdragging 138
Fork Attachment 139
Parking the Machine 141
Loading Machine for Transport 143
Towing—Recovery Procedure 145
Lifting the Machine 147
Joystick Steering Control—If Equipped 148
Operation—Monitor Operation 149
Aftertreatment Indicators Overview 149
Primary Display Unit (PDU) 150
Main Menu 151
Main Menu—Display Settings 152
Main Menu—Diagnostics 153
Main Menu—Exhaust Filter 155
Main Menu—Exhaust Filter Auto Cleaning 156
Main Menu—Exhaust Filter Parked Cleaning 157
Main Menu—Exhaust Filter Emergency Override 158
Main Menu—Software Update 158
Main Menu—Calibrations—Electro-Hydraulic Valves 159
Main Menu—Calibrations—Implement Control Levers 160
Main Menu—Calibrations—Loader Position Sensors 161
Main Menu—Calibrations—Loader Linkage 161
Main Menu—Calibrations—Armrest Position Sensor 162
Main Menu—Calibrations—Transmission Clutches 162
Main Menu—Calibrations—Hydraulic Pressure Management (HPM) Valve 163
Main Menu—Calibrations—Brake Pedal 163
Main Menu—Machine Setup 164
Main Menu—Security 169
Main Menu—Machine Fan 171
Main Menu—Fuel Consumption 172
Main Menu—About 173
Main Menu—Job Timer 173
Main Menu—Camera—If Equipped 174
Main Menu—Payload Weighing—If Equipped 175
Main Menu—Tire Pressure Monitoring System (TPMS)—If Equipped 176
Main Menu—Attachments—If Equipped 177
Maintenance—Machine 178
Required Emission-Related Information 178
Diesel Fuel 178
Diesel Fuel Specifications 179
Lubricity of Diesel Fuel 179
Handling and Storing Diesel Fuel 179
Biodiesel Fuel 180
Testing Diesel Fuel 181
Supplemental Diesel Fuel Additives 181
Fuel Filters 181
Diesel Exhaust Fluid (DEF) — Use in Selective Catalytic Reduction (SCR) Equipped Engines 182
Refilling Diesel Exhaust Fluid (DEF) Tank 183
Testing Diesel Exhaust Fluid (DEF) 184
Storing Diesel Exhaust Fluid (DEF) 184
Disposal of Diesel Exhaust Fluid (DEF) 185
Minimizing the Effect of Cold Weather on Diesel Engines 186
John Deere Break-In Plus™ Engine Oil — Interim Tier 4, Final Tier 4, Stage IIIB, Stage IV, and Stage V 187
Diesel Engine Oil — Interim Tier 4, Final Tier 4, Stage IIIB, Stage IV, and Stage V 188
Engine Oil and Filter Service Intervals — Interim Tier 4, Final Tier 4, Stage IIIB, Stage IV, and Stage V Engines 189
Diesel Engine Oil Service Interval for Operation at High Altitude 189
Oil Filters 190
Diesel Engine Coolant (engine with wet sleeve cylinder liners) 191
Water Quality for Mixing with Coolant Concentrate 192
Operating in Warm Temperature Climates 192
Testing Coolant Freeze Point 193
Disposing of Coolant 193
Alternative and Synthetic Lubricants 194
Lubricant Storage 194
Mixing of Lubricants 194
Hydraulic Oil 195
Transmission, Park Brake, and Axle Oil 196
Multipurpose Extreme Pressure (EP) Grease 196
Maintenance—Periodic Maintenance 197
Service Machine at Specified Intervals 197
Check the Hour Meter Regularly 197
Prepare Machine for Maintenance 198
Frame Locking Bar 199
Locking Loader Boom 200
Engine Service Doors and Side Shields 200
Cooling System Doors 201
Fuel Tank 202
Fluid Analysis Program Test Kits and 3-Way Coolant Test Kit 202
Service Intervals 203
Required Parts 205
Maintenance—As Required 207
Check Windshield Washer Fluid Level 207
Check Cab Fresh Air Filter 207
Check Cab Recirculation Air Filter 208
Check and Clean Cab Air Precleaner Housing—If Equipped 209
Check and Clean Heating and Air Conditioner Housing 210
Inspect Tires and Check Pressure 211
Tire Pressures 213
Check Wheel Bolt Torque 214
Clean Hydraulic Pump Case Drain In-Line Screen 215
Check Rear Camera and Radar Object Detection (ROD) System—If Equipped 218
Inspect Engine Air Cleaner Elements 220
Inspect Serpentine Belt 221
Clean Cooler Cores 222
Drain Water From Primary Fuel Filter With Water Separator 224
Service Exhaust Filter 224
Drain, Flush, and Refill Fuel Tank 225
Lubricate Cab Door Hinges 226
Clean Debris From Coupler Lock Cylinder—If Equipped 226
Clean and Tighten Battery Terminals 228
Maintenance—Every 10 Hours or Daily 229
Clean Air Cleaner Dust Unloader Valve 229
Check Coolant Level at Surge Tank 230
Check Engine Oil Level 231
Check Hydraulic System Oil Level 231
Check Transmission Oil Level 232
Inspect Outer Pin Seals 233
Maintenance—Every 100 Hours 234
Lubricate Loader Linkage and Cylinder Pivots 234
Lubricate Coupler Lock Pins—If Equipped 238
Maintenance—Every 250 Hours 239
Take Engine Oil Sample 239
Maintenance—Initial Service 500 Hours 240
Replace Axle Oil Filters 240
Maintenance—Every 500 Hours 241
Lubricate Driveline Upper and Lower Sliding Joints and Lower U-joints 241
Lubricate Front and Rear Axle Shaft Seals 242
Check Hybrid Battery Electrolyte Level—If Equipped 243
Replace Hydraulic Reservoir Breather Filter 245
Check Front and Rear Axle Oil Level 246
Check Air Intake Hoses and Charge Air Cooler Tube Couplings 247
Take Fluid Samples 247
Replace Fast Fill Fuel Breather Filter—If Equipped 248
Drain and Refill Engine Oil and Replace Filter 249
Replace Primary Fuel Filter 251
Replace Final Fuel Filter 252
Replace In-Line Fuel Filter 252
Check Park Brake Oil Level 253
Lubricate Front and Rear Shaft Seals on Park Brake 253
Check Ride Control Accumulator—If Equipped 254
Maintenance—Every 1000 Hours 255
Replace Air Cleaner Dust Unloader Valve 255
Replace Engine Air Cleaner Elements 256
Replace Fuel Tank Breather Filter 257
Check Coolant Condition 257
Replace Axle Oil Filters 258
Lubricate Frame Hinge Pivots 258
Drain and Refill Park Brake Oil 259
Maintenance—Every 2000 Hours 260
Drain and Refill Transmission Oil and Replace Filter 260
Drain and Refill Front and Rear Axle Oil 262
Replace Open Crankcase Ventilation (OCV) Filter 263
Check and Adjust Engine Valve Lash 263
Replace Outer Pin Seals—If Equipped 263
Rerun Transmission Clutch Calibration 263
Maintenance—Every 4000 Hours 264
Access Diesel Exhaust Fluid (DEF) Dosing Unit Filter 264
Replace Diesel Exhaust Fluid (DEF) Dosing Unit Filter 265
Replace Diesel Exhaust Fluid (DEF) Tank Breather Filter 266
Replace Hydraulic System Return Filter 267
Drain, Flush, and Refill Hydraulic System Oil 268
Clean Hydraulic System Fill Strainer 270
Maintenance—Every 5000 Hours 271
Check Driveline Damper for Cracks 271
Maintenance—Every 6000 Hours 272
Drain Cooling System 272
Cooling System Fill and Deaeration Procedure 274
Replace Diesel Exhaust Fluid (DEF) In-Line Filter 275
Miscellaneous—Machine 276
Check Air Inlet Cover 276
Bleed Fuel System 276
Do Not Service or Adjust Injection Nozzles or High-Pressure Fuel Pump 276
Do Not Service Control Valves, Cylinders, Pumps, or Motors 276
Clean Machine Regularly 277
Precautions for Alternator and Regulator 277
Handling, Checking, and Servicing Batteries Carefully 278
Using Battery Charger 279
Using Booster Batteries—24-Volt System 280
Replacing Batteries 281
Welding on Machine 282
Keep Electronic Control Unit Connectors Clean 282
JDLink™ Machine Monitoring System (MMS)—If Equipped 282
Replacing Fuses 283
Remove and Install Halogen Bulbs 286
Remove and Install Light-Emitting Diode (LED) Lights 287
Fluid Sampling Test Ports 288
Service Recommendations For Snap-To-Connect (STC®) Fittings 290
Keep ROPS Installed Properly 291
External Service Brake Inspection 292
Verified Anchor Point Information 293
Replacing Seat Belt 293
Replacing Bucket Teeth—TK Series 294
Air Conditioning System Service 294
Hardware Torque Specifications 295
Unified Inch Bolt and Screw Torque Values 296
Metric Bolt and Screw Torque Values 297
Miscellaneous—Operational Checkout 298
Operational Checkout 298
Diagnostic Trouble Code (DTC) Check 298
Operational Checks—Ignition OFF, Engine OFF Checks 298
Operational Checks—Ignition ON, Engine OFF Checks 299
Operational Checks—Ignition On, Engine On Checks 308
Miscellaneous—Troubleshooting 336
Troubleshooting Procedure 336
Engine 337
Transmission 342
Differential and Axle 344
Service Brake 345
Driveline 346
Park Brake 346
Hydraulic System 347
Steering 350
Air Conditioning System 351
Heater System 352
Software Update 353
Miscellaneous—Storage 354
Prepare Machine for Storage 354
Monthly Storage Procedure 355
Preparing Engine for Long-Term Storage 356
Removing Engine From Long-Term Storage 357
Miscellaneous—Machine Numbers 358
Record Product Identification Number (PIN) 358
Record Engine Serial Number 358
Record Transmission Serial Number 358
Record Hydraulic Pump Serial Number 359
Record Front and Rear Axle Housing Serial Numbers 359
Keep Proof of Ownership 359
Keep Machines Secure 359
Miscellaneous—Specifications 360
Engine Specifications 360
Drain and Refill Capacities 360
Standard Z-Bar Specifications 361
High Lift Z-Bar Specifications 363
Travel Speeds 364
Eurasian Economic Union 365
Machine Design Life 365
Page Number 27
Section 1-1 31
Section 1-2 33
Section 1-3 43
Section 1-4 51
Section 1-5 56
Section 2-1 64
Section 2-2 95
Section 2-3 149
Section 3-1 178
Section 3-2 197
Section 3-3 207
Section 3-4 229
Section 3-5 234
Section 3-6 239
Section 3-7 240
Section 3-8 241
Section 3-9 255
Section 3-10 260
Section 3-11 264
Section 3-12 271
Section 3-13 272
Section 4-1 276
Section 4-2 298
Section 4-3 336
Section 4-4 354
Section 4-5 358
Section 4-6 360
S.V 04/24
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