John Deere 344G 444G 4WD Loader Operation & Test Service Manual (TM1557) PDF - MJODTM1557.zip
Complete Operation and Testing service manual, featuring Electrical Wiring Diagrams, for the John Deere 344G and 444G 4WD Loader (serial numbers prior to 22913) — packed with the shop-level detail needed to service, troubleshoot, and overhaul the machine the way professional technicians do.
The John Deere 344G and 444G 4WD Loader workshop Diagnosis and Test manual contains:
* 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.
TM1557 - John Deere 4WD Loader Model 344G and 444G Technical Manual - Operation and Test.PDF
TM1557 - John Deere 4WD Loader Model 344G and 444G Technical Manual - Operation and Test.epub
Total Pages: 656 pages
File Format: PDF/EPUB/MOBI/AZW (PC/Mac/Android/Kindle/iPhone/iPad; bookmarked, ToC, Searchable, Printable)
Language: English
MAIN SECTIONS
Foreword
General Information
Safety
General Specifications
Torque Values
Fuels And Lubricants
Operational Checkout Procedure
Operational Checkout Procedure
Engine
Theory Of Operation
System Operational Checks
Diagnostic Information
Adjustment
Tests
Electrical System
System Information
System Diagrams
Sub-System Diagnostics
Power Train
Theory Of Operation
System Operational Checks
Diagnostic Information
Adjustments
Tests
Hydraulic System
Theory Of Operation
System Operational Checks
Diagnostic Information
Adjustments
Tests
tm1557 - 344g, 444g loader operation and test
Table of Contents
Foreword
Section 9000: General Information
Group 01: Safety
Handle Fluids Safely-Avoid Fires
Prevent Battery Explosions
Prepare for Emergencies
Prevent Acid Burns
Handle Chemical Products Safely
Avoid High-Pressure Fluids
Park Machine Safely
Support Machine Properly
Wear Protective Clothing
Work in Clean Area
Service Machines Safely
Work In Ventilated Area
Illuminate Work Area Safely
Replace Safety Signs
Use Proper Lifting Equipment
Remove Paint Before Welding or Heating
Avoid Heating Near Pressurized Fluid Lines
Keep ROPS Installed Properly
Service Tires Safely
Avoid Harmful Asbestos Dust
Practice Safe Maintenance
Use Proper Tools
Dispose of Waste Properly
Live With Safety
Group 02: General Specifications
344G Loader
344G Loader Operating Information
Loader Specifications-344G
Drain And Refill Capacity-344G
444G Loader
444G Loader Operating Information
Loader Specifications-444G
Drain And Refill Capacities-444G
Group 03: Torque Values
Hardware Torque Specifications
ROPS Torque Specifications
Metric Bolt and Cap Screw Torque Values
Additional Metric Cap Screw Torque Values
Unified Inch Bolt and Cap Screw Torque Values
Check Oil Lines And Fittings
Service Recommendations for 37° Flare and 30° Cone Seat Connectors
Service Recommendations for O-Ring Boss Fittings
Service Recommendations for Flat Face O-Ring Seal Fittings
Service Recommendations For Inch Series Four Bolt Flange Fittings
Service Recommendations for Metric Series Four Bolt Flange Fitting
Group 04: Fuels And Lubricants
Fuel Specifications
Low Sulfur Diesel Fuel Conditioner
Storing Fuel
Do Not Use Galvanized Containers
Fuel Tank
Engine Oil
Power Shift (HI-LO) Transmission And Brake System Oil
Hydraulic/Hydrostatic System Oil
Differential Oil
Grease
Alternative and Synthetic Lubricants
Lubricant Storage
Mixing of Lubricants
Engine Coolant
Section 9005: Operational Checkout Procedure
Group 10: Operational Checkout Procedure
Operational Checkout Record Sheet
Complete Machine Operational Checkout
Section 9010: Engine
Group 05: Theory Of Operation
4045 John Deere Engine-Use CTM8
Alternators And Starting Motors-Use CTM77
General Engine Description
Engine-Sectional View
Group 10: System Operational Checks
Engine Operational Checks
Group 15: Diagnostic Information
Diagnose Engine Malfunctions
Group 20: Adjustment
Fan Belt Tension Adjustment
Engine Speed Adjustment
Engine Speed Control Linkage Adjustment
Group 25: Tests
JT05801 Clamp-On Electronic Tachometer Reader Installation Procedure
JT05800 Digital Thermometer Installation
Air Filter Restriction Indicator Switch Test
Air Intake System Leakage Test
Radiator Air Flow Test
Engine Performance Test Using Engine Pulldown
Fuel Line Leakage Test
Section 9015: Electrical System
Group 05: System Information
Visually Inspect Electrical System
Electrical Circuit Malfunctions
High Resistance Circuit
Open Circuit
Grounded Circuit
Shorted Circuit
Multimeter
Seven Step Electrical Test Procedure
Wiring Diagram And Schematic Information
Reading A System Functional Schematic
Reading A Wiring Diagram
Electrical Schematic Symbols
Group 10: System Diagrams
Component Identification Table
Replacing Fuses
Fuse (Blade-Type) Color Codes
Fuse Specifications
Wiring And Schematic Diagrams Legend
System Functional Schematic Section Legend
System Functional Schematic
Front Console Harness (W5) Wiring Diagram
Front Console Harness (W5) Component Location
Side Console Harness (W6) Wiring Diagram
Side Console Harness (W6) Component Location
Rear Frame Harness (W7) Wiring Diagram
Rear Frame Harness (W7) Component Location
Engine Harness (W8) Wiring Diagram
Engine Harness (W8) Component Location
Cab Harness (W9) Wiring Diagram
Cab Harness (W9) Component Location
Front Frame/Center Pin Harness (W10) Wiring Diagram
Front Frame/Center Pin Harness (W10) Component Location
Group 15: Sub-System Diagnostics
Power Circuit Theory Of Operation
Power Circuit Schematic
Starting Circuit Theory Of Operation
Starting Circuit Schematic
Start Aid And Fuel Shut-Off Circuit Theory Of Operation
Start Aid And Fuel Shut-Off Schematic
Switch And Sender Specifications
Monitor Circuit Theory Of Operation
Monitor Circuit Schematic
Secondary Steering Circuit Theory Of Operation
Secondary Steering Circuit Schematic
Secondary Steering Circuit Diagnostic Procedures
Turn Signal/Flasher Circuits Theory Of Operation
Turn Signal/Flasher Circuit Schematic
Park Brake Switch Specification
Park Brake Circuit Theory Of Operation
Park Brake Circuit Schematic
FNR/Reverse Warning Circuits Theory Of Operation
FNR/Reverse Warning Circuit Schematic
Transmission Circuit Theory Of Operation
Transmission Circuit Schematic
Light/Dimmer/Radio Circuit Theory Of Operation
Light/Dimmer/Radio Circuit Schematic
Ride Control Circuit Theory Of Operation
Ride Control Circuit Schematic
Boom Kickout/Return-To-Dig Circuit Theory Of Operation
Boom Kickout/Return-To-Dig Circuit Schematic
Boom Kickout/Return-To-Dig Circuit Diagnostic Procedures
Boom Kickout/Return-To-Dig Circuit Diagnostic Procedures-Continued
Front Drive And Turn Light Circuit Theory Of Operation
Front Drive And Turn Light Circuit Schematic
Front And Rear Wiper/Washer Circuit Theory Of Operation
Front And Rear Wiper/Washer Circuit Schematic
Heater Blower Circuit Theory Of Operation
Heater Blower Circuit Schematic
Air Conditioner/Heater Circuit Theory Of Operation
Air Conditioner/Heater Circuit Schematic
License/Turn/Tail/Brake Light Circuit Theory Of Operation
License/Turn/Tail/Brake Light Circuit Schematic
Front And Rear Work Lights
Front And Rear Work Light Circuit Schematic
Diff Lock/Pin Disconnect/Dome Light Circuit Theory Of Operation
Diff Lock/Pin Disconnect/Dome Light Circuit Schematic
Horn Circuit Theory Of Operation
Horn Circuit Schematic
Section 9020: Power Train
Group 05: Theory Of Operation
Power Train Operation
Brake Circuit Operation
Brake Valve Operation
Brake Booster Operation-Brakes Applied
Transmission And Brake Pump
Transmission/Brake Filter Operation
Park Brake Operation
Transmission Pressure Regulating Valve And Lube Relief Valve
High-Low Transmission Components
High-Low Transmission-Low Range
High-Low Transmission-High Range
High-Low Transmission Control Valve
High-Low Transmission Hydraulic Circuit High Range Before Shift
High-Low Transmission Hydraulic Circuit Low Range After Shift
Transmission Low Range
Transmission High Range-Shift Initiated
Transmission High Range-Modulation Starting
Transmission High Range-Shift Completed
Hydrostatic Circuit Schematic
Hydrostatic Charge Pump Operation
Hydrostatic Charge Filter Operation
Hydrostatic Pump Operation
Control Pressure Starting Point Valve Operation
Control Pressure Regulating Valve And Regulating Orifice Operation
Forward, Neutral, And Reverse (FNR) Solenoid Valve Operation
Neutral Dump Solenoid Valve Operation
Neutral Dump Valve Operation
Neutral Dump Valve (Forward Or Reverse) Operation
Pressure Override Valve Operation-Valve Closed
Pressure Override Valve Operation-Valve Open
Inching Orifice Operation
Acceleration Check Valve And Orifice Operation
Hydrostatic Motor Operation
Flushing Valve And Motor Displacement Shuttle Valve Operation
Motor Displacement Control Valve (High Closed Loop Pressure) Operation
Motor Displacement Control Valve (Low Closed Loop Pressure) Operation
High Pressure Relief Valve Operation
Control Pressure Bypass Valve Operation
Differential Lock Operation
Differential Assembly Operation
Final Drive Operation
Group 10: System Operational Checks
Power Train Operational Checks
Group 15: Diagnostic Information
Diagnose Transmission Malfunctions
Diagnose Differential/Axle Malfunctions
Diagnose Drive Line Malfunctions
Diagnose Service Brake Malfunctions
Diagnose Park Brake Malfunctions
Brake And Hi/Low Transmission Schematic
Transmission/Brake/Differential Component Location
HST Schematic
HST Circuit (Forward At Low Speed-Low Load)
HST Transmission Component Location
Group 20: Adjustments
Park Brake Adjustment
Brake Pedal And Inching Pedal Linkage Adjustment
Brake Pad Inspection
Bleed Brake Hydraulic System
Front Axle Disconnect Cable Adjustment
Group 25: Tests
Hydrostatic (HST) Warm-Up Procedure
Complete System Test
HST Charge Pump Flow Test
Neutral Charge Relief And Operating Charge Orifice Tests
Control Pressure And Starting Point Valve Test
Pressure Override (POR) Valve Test
High Pressure Relief Valve Test
Motor Displacement Control Valve Test
Neutral Dump Valve Test
Control System Test
Volumetric Efficiency Test
HST Start-Up Procedure
HI-LO Transmission Warm-Up Procedure
Hi-Lo Transmission System Pressure, Element Leakage, And Modulation Tests
HI-LO Transmission Pump Flow Test
HI-LO Transmission Lubrication Pressure Test
Hi-Lo Transmission Cooler Bypass And Lube Relief Valve Test
Brake Booster Pressure Test
Differential Lock Pressure Test
Differential Lock Leakage Test