John Deere 644K 4WD Loader Operator's Manual (OMT344174)

Price: US$ 29.00

John Deere 644K 4WD Loader Operator's Manual (OMT344174)

omt344174 - John Deere 644K 4WD Loader Operator's Manual.pdf

Complete Operator's Manual for John Deere 644K 4WD Loader, with all the shop information to maintain, diagnostic, repair, refurbish/rebuild like professional mechanics.

Total Pages/Size: 687 pages
File Format: PDF (Internal Links, Bookmarked, Table of Contents, Searchable, Printable, high quality)
Language: English

Table of Contents - Expanded


Manual Identification—READ THIS FIRST!


License Agreement for John Deere Software

Conformity Marking for European Union (EU) and Eurasian Economic Union (EAEU)

Emissions Control System Certification Label

EPA Non-road Emissions Control Warranty Statement—Compression Ignition

CARB Non-road Emissions Control Warranty Statement—Compression Ignition

FCC Notifications to User


Technical Information Feedback Form

Section 1-1: Safety—Safety and Operator Conveniences

Safety and Operator Convenience Features

Section 1-2: Safety—General Precautions

Information for European Union Directives and Eurasian Economic Union Technical Regulations Compliance

Recognize Safety Information

Follow Safety Instructions

Operate Only If Qualified

Wear Protective Equipment

Avoid Unauthorized Machine Modifications

Inspect Machine

Stay Clear of Moving Parts

Avoid High-Pressure Fluids

Avoid High-Pressure Oils

Work In Ventilated Area

Prevent Fires

Avoid Static Electricity Risk When Refueling

High Debris Applications

Clean Debris from Machine

Prevent Battery Explosions

Handle Chemical Products Safely

Handle Starting Fluid Safely

Decommissioning — Proper Recycling and Disposal of Fluids and Components

Prepare for Emergencies

In Case of Machine Fire

Add Cab Guarding for Special Uses

Do Not Use Starting Fluid

Section 1-3: Safety—Operating Precautions

Use Steps and Handholds Correctly

Start Only From Operator's Seat

Use and Maintain Seat Belt

Prevent Unintended Machine Movement

Avoid Work Site Hazards

Avoid Power Lines

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

Travel Safely

Prevent Acid Burns

Add and Operate Attachments Safely

Section 1-4: Safety—Maintenance Precautions

Park and Prepare for Service Safely

Service Machines Safely

Service Cooling System Safely

Service Tires Safely

Remove Paint Before Welding or Heating

Make Welding Repairs Safely

Drive Metal Pins Safely

Use Proper Lifting Equipment

Section 1-5: Safety—Safety Signs and Other Instructions

Safety Signs and Other Instructions

Section 2-1: Operation—Operator’s Station

Levers—Two Function Hydraulic Control

Levers—Three Function Hydraulic Control

Levers—Four Function Hydraulic Control

Levers—Joystick Steering Control


Sealed Switch Module (SSM)

Switch Module Functions

Advanced Display Unit (ADU)

Display Unit Functions

Horn Button

Turn Signals

Joystick Steering Armrest Adjustment— if Equipped

Air Conditioner and Heater Operation

Counter Switch

Opening and Securing Side Door

Opening Side Window/Secondary Exit

Opening Rear Side Window

Seat Adjustment

Fire Extinguisher Mounting Location

Section 2-2: Operation—Operating the Machine

Before Starting Work

Inspect Machine Daily Before Starting

Check Instruments Before Starting

Security System

Battery Disconnect Switch

Engine Break-In Period

Starting the Engine

Cold Start Aid—Glow Plug

Cold Start Aid—Block Heater—If Equipped


Cold Weather Warmup

Park Brake Switch

Shifting the Transmission

Automatic Idle and Automatic Shutdown

Joystick Bucket and Boom Control

Two Lever Bucket and Boom Control

Auxiliary Control

Joystick Steering Control—If Equipped

Ride Control—If Equipped

Secondary Steering—If Equipped

Differential Lock Operation

Service ADVISOR™ Remote (SAR) Software Delivery Process

Rear Camera and Radar Object Detection (ROD) System—If Equipped

Counter Switch Operation

Embedded Payload Scale—If Equipped

Boom Height Kickout Adjustment

Return-to-Carry Kickout Adjustment

Return-to-Dig Adjustment for Z-Bar Linkage

Return-to-Dig Adjustment for Powerllel™ Linkage—If Equipped

Operating Loader Coupler—If Equipped

Using the Loader Bucket


Fork Attachment

Parking the Machine

Loading Machine on a Trailer

Towing Procedure

Lifting the Machine

Section 2-3: Operation—Monitor Operation

Display Unit—Normal Display

Display Unit—Main Menu

Display Unit—Main Menu—Codes

Display Unit—Main Menu—Codes—Active Codes

Display Unit—Main Menu—Codes—Stored Codes

Display Unit—Main Menu—Settings

Display Unit—Main Menu—Settings—Reverse Fan Cycle

Display Unit—Main Menu—Settings—Courtesy Lights

Display Unit—Main Menu—Settings—Quick Shift

Display Unit—Main Menu—Settings—Job Timer

Display Unit—Main Menu—Settings—Stopwatch

Display Unit—Main Menu—Settings—Ride Control—If Equipped

Display Unit—Main Menu—Settings—Counters

Display Unit—Main Menu—Settings—Camera Mode

Display Unit—Main Menu—Settings—Operator Configuration

Display Unit—Main Menu—Settings—Clutch Cutoff

Display Unit—Main Menu—Diagnostics

Display Unit—Main Menu—Diagnostics—Machine ID

Display Unit—Main Menu—Diagnostics—Battery Monitor

Display Unit—Main Menu—Diagnostics—Engine Sensors

Display Unit—Main Menu—Diagnostics—Transmission/Axle

Display Unit—Main Menu—Diagnostics—Hydraulic Sensors

Display Unit—Main Menu—Diagnostics—Machine Sensors

Display Unit—Main Menu—Diagnostics—FNR Selector

Display Unit—Main Menu—Diagnostics—Cab Switches

Display Unit—Main Menu—Diagnostics—Switch Module

Display Unit—Main Menu—Diagnostics—Joystick Steering—If Equipped

Display Unit—Main Menu—Diagnostics—Tire Pressure—If Equipped

Display Unit—Main Menu—Diagnostics—Object Detect—If Equipped

Display Unit—Main Menu—Diagnostics—Auto Diff Lock—If Equipped

Display Unit—Main Menu—Diagnostics—Payload Scale—If Equipped

Display Unit—Main Menu—Diagnostics—JDLink™ System Info

Display Unit—Main Menu—Diagnostics—Park Brake Test

Display Unit—Main Menu—Payload Scale—If Equipped

Display Unit—Main Menu—Payload Scale—Long Total

Display Unit—Main Menu—Payload Scale—Display Units

Display Unit—Main Menu—Payload Scale—Auto Add

Display Unit—Main Menu—Payload Scale—Diagnostics

Display Unit—Main Menu—Payload Scale—Setup

Display Unit—Main Menu—Monitor Settings

Display Unit—Main Menu—Security

Display Unit—Main Menu—Security—Security

Display Unit—Main Menu—Security—Change Owner PIN

Display Unit—Main Menu—Security—Manage Operator PINs

Display Unit—Main Menu—Security—Manage Transport PIN

Display Unit—Main Menu—Security—Delayed Operator Logout

Display Unit—Main Menu—Software Delivery

Display Unit—Main Menu—Software Delivery—Software Update

Section 3-1: Maintenance—Machine

Required Emission-Related Information

Diesel Fuel

Lubricity of Diesel Fuel

Handling and Storing Diesel Fuel

BioDiesel Fuel

Testing Diesel Fuel

Minimizing the Effect of Cold Weather on Diesel Engines

Alternative and Synthetic Lubricants

Lubricant Storage

Mixing of Lubricants

Diesel Engine Break-In™ Oil

Diesel Engine Oil—Tier 3 and Stage III A Engines

Engine Oil and Filter Service Intervals — Tier 3 and Stage IIIA Engines

Diesel Engine Oil—Tier 2 and Stage II Engines

Engine Oil and Filter Service Intervals — Tier 2 and Stage II Engines

Oil Filters

Transmission, Park Brake, and Axle Oil

Hydraulic Oil


Diesel Engine Coolant (engine with wet sleeve cylinder liners)

Drain Intervals for Diesel Engine Coolant

John Deere COOL-GARD™ II Coolant Extender

Supplemental Coolant Additives

Operating in Warm Temperature Climates

Additional Information About Diesel Engine Coolants and John Deere COOL-GARD™ II Coolant Extender

Testing Diesel Engine Coolant

Disposing of Coolant

Section 3-2: Maintenance—Periodic Maintenance

Engine Identification

Service Machine at Specified Intervals

Check Hour Meter Regularly

Prepare Machine for Maintenance

Frame Locking Bar

Boom Lock

Pin Removal—If Equipped With Powerllel™ Linkage

Engine Service Doors and Side Shields

Cooling System Doors

Fuel Tank

Fluid Analysis Program Test Kits and 3-Way Coolant Test Kit

Service Intervals

Required Parts

Section 3-3: Maintenance—As Required

Inspect Tires and Check Pressure

Tire Pressures

Check Wheel Bolt Torque

Inspect Engine Air Cleaner Elements

Inspect Air Conditioner Compressor and Alternator Belt

Clean Cooler Cores

Check Window Washer Fluid Level

Drain Water From Primary Fuel Filter With Water Separator

Drain Water From Final Fuel Filter

Drain Water From Auxiliary Fuel Filter With Water Separator—If Equipped

Check and Clean or Replace Cab Fresh Air Filter

Check and Clean or Replace Cab Recirculating Air Filter

Check Rear Camera and Radar Object Detection (ROD) System—If Equipped

Section 3-4: Maintenance—Every 10 Hours or Daily

Clean Air Cleaner Dust Unloader Valve

Check Coolant Level at Surge Tank

Check Engine Oil Level

Check Hydraulic System Oil Level

Check Transmission Oil Level

Inspect Outer Pin Seals—If Equipped

Section 3-5: Maintenance—Initial Service—100 Hours

Replace Axle Oil Filters

Section 3-6: Maintenance—Every 100 Hours

Lubricate Loader Linkage and Cylinder Pivots—Z-Bar Linkage

Lubricate Loader Linkage and Cylinder Pivots—Powerllel™ Linkage

Section 3-7: Maintenance—Every 250 Hours

Take Engine Oil Sample

Section 3-8: Maintenance—Every 500 Hours

Lubricate Driveline Upper and Lower Sliding Joints and Lower U-Joints

Check Front and Rear Axle Oil Level

Lubricate Front and Rear Axle Shaft Seals

Check Battery Electrolyte Level and Terminals

Check Air Intake Hoses and Charge Air Cooler Tube Couplings

Replace Fast Fill Fuel Breather Filter—If Equipped

Drain and Refill Engine Oil and Replace Filter

Drain and Refill Engine Oil and Replace Filter (Quick Service)—If Equipped

Replace Primary Fuel Filter

Replace Final Fuel Filter

Replace Auxiliary Fuel Filter—If Equipped

Replace In-Line Fuel Strainer

Replace Hydraulic Reservoir Breather Filter

Check Park Brake Oil Level

Lubricate Front and Rear Shaft Seals on Park Brake

Take Fluid Samples

Check Ride Control Accumulator—If Equipped

Section 3-9: Maintenance—Every 1000 Hours

Clean Engine Crankcase Vent Tube

Replace Air Cleaner Dust Unloader Valve

Replace Engine Air Cleaner Elements

Check Coolant Condition

Replace Axle Oil Filters

Lubricate Frame Hinge Pivots

Drain and Refill Park Brake Oil

Section 3-10: Maintenance—Every 2000 Hours

Replace Outer Pin Seals—If Equipped

Drain and Refill Transmission Oil and Replace Filter

Drain and Refill Transmission Oil and Replace Filter (Quick Service)—If Equipped

Drain and Refill Front and Rear Axle Oil

Clean Front and Rear Axle Oil Recirculation Screens—If Equipped

Check and Adjust Engine Valve Lash

Rerun Transmission Clutch Calibration

Section 3-11: Maintenance—Every 4000 Hours

Replace Crankshaft Damper

Clean Hydraulic Pump Case Drain In-Line Screen

Replace Hydraulic System Return Filter

Drain, Flush, and Refill Hydraulic System Oil

Drain and Refill Hydraulic System Oil (Quick Service)—If Equipped

Clean Hydraulic System Fill Strainer

Section 3-12: Maintenance—Every 5000 Hours

Check Driveline Damper For Cracks

Section 3-13: Maintenance—Every 6000 Hours

Drain Cooling System

Refill Cooling System

Drain and Refill Cooling System (Quick Service)—If Equipped

Section 4-1: Miscellaneous—Machine

Tire Removal With Tire Pressure Monitor (TPM) System—If Equipped

Check Air Inlet Cover

Inspect Fuel Tank Vent Hose and Breather Filter

Bleed Fuel System

Do Not Service Control Valves, Cylinders, Pumps, or Motors

Precautions for Alternator and Regulator

Handling, Checking, and Servicing Batteries Carefully

Using Booster Batteries—24-Volt System

Using Battery Charger

Replacement Batteries

Remove and Install Batteries

12-Volt Auxiliary Power Outlet—If Equipped

JDLink™ Machine Monitoring System (MMS)—If Equipped

Replacing Fuses

Remove and Install Halogen Bulbs

Fluid Sampling Test Ports—If Equipped

Air Conditioner System Service

External Service Brake Inspection

Bleeding Brakes

Service Recommendations For Snap-To-Connect (STC®) Fittings

Welding on Machine

Welding Near Electronic Control Units

Keep Electronic Control Unit Connectors Clean

Replacing Bucket Teeth—TK Series

Keep ROPS Installed Properly

Hardware Torque Specifications

Unified Inch Bolt and Screw Torque Values

Metric Bolt and Screw Torque Values

Section 4-2: Miscellaneous—Operational Checkout

Operational Checkout

Section 4-3: Miscellaneous—Troubleshooting

Troubleshooting Procedure



Differential and Axle

Service Brake


Park Brake

Hydraulic System


Air Conditioning System

Heater System

Software Update

Section 4-4: Miscellaneous—Storage

Prepare Machine for Storage

Monthly Storage Procedure

Section 4-5: Miscellaneous—Machine Numbers

Record Product Identification Number (PIN)

Record Engine Serial Number

Record Transmission Serial Number

Record Hydraulic Pump Serial Number

Record Front and Rear Axle Housing Serial Numbers

Keep Proof of Ownership

Keep Machines Secure

Section 4-6: Miscellaneous—Specifications

Engine Specifications

Drain and Refill Capacities

Standard Z-Bar Specifications

High Lift Z-Bar Specifications

Powerllel™ Specifications

Travel Speeds

Eurasian Economic Union

Machine Design Life