John Deere 644J and 724J Loader Operation and Test Technical Manual (TM2075)

John Deere 644J and 724J Loader Operation and Test Technical Manual (TM2075 17OCT06)

This comprehensive technical manual offers in-depth operation procedures, system diagnostics, and performance tests for the John Deere 644J and 724J Loaders. Designed for skilled technicians, it covers electronic systems, powertrain, hydraulics, diagnostics, and heating/AC components, enabling effective servicing and machine optimization for both standard and high-serial number ranges.

Model Covers:

John Deere 644J Loader
John Deere 724J Loader

File Format: PDF

Size: 32.96 MB

No. of pages: 1186

Language: English

Delivery Method: Instant Download – Access your file immediately after purchase.

📑 Included Sections:

Safety and General Information

• Extensive safety instructions for loader operation and maintenance
• Emergency procedures, machine inspection, and PPE guidelines
• Fluid handling, fire prevention, and rollover precautions

Operational Checkout and Engine Systems

• Complete engine-off and running checks
• Electronic fuel injection and PowerTech 8.1L engine diagnostics
• Turbocharger and air intake leakage tests

Electrical System and Diagnostics

• Wiring diagrams and component locations for all S/N ranges
• CAN bus diagnostics, ECU/TCU/CMU circuit operation
• Comprehensive DTCs and connector repair procedures

Powertrain Systems

• Transmission, torque converter, and axle theory of operation
• Clutch calibration, oil pressure testing, and stall speed tests
• Service and park brake system checks

Hydraulic System

• Loader valve and pump theory, flow and pressure tests
• Ride control and accumulator maintenance
• Pilot control diagnostics and drift/leakage tests

Heating and Air Conditioning

• Cycle of operation, control system diagnosis
• Switch testing, refrigerant management, and leak detection
• R134a system tests and performance charts

For complete service information, also see:

644J and 724J Loader Repair Manual .......... TM2076
724J Loader Operator’s Manual (S.N. —590067) .......... OMT182027
644J and 724J Loader Operator’s Manual (S.N. 590068—) .......... OMT200782
Alternators and Starting Motors .......... CTM77
PowerTech 8.1L Diesel Engines - Base Engine .......... CTM86
TeamMate III 1000, 1200, and 1400 Series Inboard Planetary Axles .......... CTM150
PowerTech 8.1L Diesel Engines - Level 9 Electronic Fuel System with Denso HPCR .......... CTM255
Super Caddy Oil Cleanup Procedure .......... CTM310
120 Series Hydraulic Cylinders .......... TM-H120A
185 Series Hydraulic Cylinders .......... TM-H185A
Service Advisor System Computer Connection .......... T133991

This John Deere 644J and 724J Loader Operation and Test Technical Manual is a complete resource for service professionals, ensuring accurate diagnostics, thorough system testing, and long-lasting machine performance.