John Deere 344K (SN. from B030077) 4WD Loader Diagnostic Operation and Test Manual TM12927 08SEP22

Table of contents
FOREWORD
MANUAL IDENTIFICATION—READ THIS FIRST!
Section 9000 – GENERAL INFORMATION
Group 01 – Safety Information
Section 9001 – DIAGNOSTIC TROUBLE CODES (DTC)
Group 10 – Engine Control Unit (ECU) Diagnostic Trouble Codes
Group 20 – Chassis Control Unit (CCU) Diagnostic Trouble Codes
Section 9005 – OPERATIONAL CHECKOUT PROCEDURE
Group 10 – Operational Checkout Procedure
Section 9010 – ENGINE
Group 05 – Theory of Operation
Group 15 – Diagnostic Information
Group 20 – Adjustments
Group 25 – Tests
Section 9015 – ELECTRICAL SYSTEM
Group 05 – System Information
Group 10 – System Diagrams
Group 15 – Sub-System Diagnostics
Group 20 – References
Section 9020 – POWER TRAIN
Group 05 – Theory Of Operation
Group 15 – Diagnostic Information
Group 20 – Adjustments
Group 25 – Tests
Section 9025 – HYDRAULIC SYSTEM
Group 05 – Theory of Operation
Group 15 – Diagnostic Information
Group 20 – Adjustments
Group 25 – Test
Section 9031 – HEATING AND AIR CONDITIONING
Group 05 – Theory of Operation
Group 15 – Diagnostic Information
Group 25 – Tests