JOHN DEERE S540 S550 S660 S670 S680 S690 COMBINE (DIAGNOSTICS AND TESTS) SERVICE MANUAL (TM803919)

John Deere S540, S550, S660, S670, S680, S690 Combine SN 000001-120099 (Diagnostics and Tests) Service Manual (TM803919)

This **John Deere service manual** provides in-depth diagnostic and testing procedures for the **S540, S550, S660, S670, S680, and S690 combine harvesters**. It covers **troubleshooting, electrical and hydraulic schematics, sensor calibration, engine diagnostics, transmission testing, and control unit analysis** to ensure optimal performance.

File Format: PDF

Size: 100.17 MB

No. of pages: 5470

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

📑 Table of Contents Overview:

General & Safety Guidelines

• Machine and component identification
• Safety procedures for servicing
• Battery handling and fluid precautions
• Hydraulic and high-pressure system safety

Diagnostic Trouble Codes (DTCs)

• Engine Control Unit (ECU) diagnostics
• Transmission, hydraulic, and electrical fault codes
• CAN Bus communication system troubleshooting
• Control module failure analysis

Electrical & Electronic Systems

• Wiring schematics and circuit diagrams
• Battery and alternator testing
• Lighting and power distribution diagnostics
• Sensor calibration and troubleshooting

Hydraulic System

• Main hydraulic pump and valve testing
• Header lift, reel drive, and feeder house hydraulics
• Hydraulic pressure checks and adjustments
• Steering and brake system diagnostics

Engine Performance & Fuel System

• Air intake and cooling system testing
• Fuel injection system diagnostics
• Turbocharger and exhaust system analysis
• Emission control system checks

Transmission & Powertrain

• Hydrostatic and mechanical drive troubleshooting
• Two-range automatic and ProDrive transmission tests
• Clutch, differential, and axle diagnostics

Combine Functional Systems

• Feeder house and threshing system testing
• Separator and chopper diagnostics
• Unloading auger and grain handling system calibration
• Yield monitoring and GreenStar integration

Calibration & Service Procedures

• Control module recalibration
• Hydraulic and electrical system reset
• Software update procedures
• Recommended service intervals and specifications

This **John Deere S540, S550, S660, S670, S680, S690 Combine Service Manual** is a comprehensive troubleshooting guide for **technicians, mechanics, and farm operators**, ensuring proper diagnostics, maintenance, and repairs.