John Deere 3940, 3950, 3960 and 3970 Forage Harvesters Technical Manual
The John Deere 3940, 3950, 3960 and 3970 Forage Harvesters Technical Manual TM1203 provides detailed technical information for servicing, troubleshooting, maintaining, adjusting, and repairing these John Deere forage harvester models. It is a practical workshop reference for agricultural equipment technicians, mechanics, operators, and owners.
Manual Specifications
- Brand: John Deere
- Models: 3940, 3950, 3960, 3970
- Equipment Type: Forage Harvesters
- Manual Type: Technical Manual
- Publication Number: TM1203
- Language: English
- Format: PDF
John Deere 3940 3970 Series Forage Harvesters Technical Manual
TABLE OF CONTENTS:
- GENERAL INFORMATION
1.1 Safety
1.2 Specifications
1.3 General Information
1.4 Lubricants - DRIVE TRAIN
2.1 Diagnosing Malfunctions
2.2 PTO Hookup – Recirculating Ball Slip
2.3 PTO Hookup – Non-Metallic Bushing Type
2.4 PTO Hookup – Grobe Spline Type
2.5 Powershaft
2.6 Bevel Gear Case
2.7 Feed Roll Gear Case
2.8 Feed Roll Drives - HYDRAULIC SYSTEM
3.1 General Information
3.2 Diagnosing Malfunctions
3.3 Electrohydraulic Valve
3.4 Tongue Position Cylinder
3.5 Hydraulic Shift Cylinders
3.6 Cutterhead Lift System
3.7 Hydraulic Downstop (3940/3960)
3.8 Spout Cap Cylinder
3.9 Spout Control Motor
3.10 Flow Divider Valve - ELECTRICAL SYSTEM
4.1 Component Location
4.2 System Functional Checks and Diagnosing Malfunctions
4.3 Tests and Adjustments
4.4 Harness Repair
4.5 IRON-GARD Metal Detector (3950/3970)
4.6 SPOUT-TRAK (3950/3970)
4.7 Downstop and Float Systems (3950/3970)
4.8 ROW-TRAK (3950/3970)
4.9 Electrical Diagrams - CUTTERHEAD ASSEMBLY
5.1 Diagnosing Malfunctions
5.2 Feed Rolls – 3940/3960
5.3 Feed Rolls – 3950/3970
5.4 Smooth Roll Scraper – Stationary Knife and Adjuster
5.5 Radius and Feed Roll Arms
5.6 Knife Sharpener
5.7 Cutterhead and Bearings - MISCELLANEOUS
6.1 Auger
6.2 Wheels
6.3 Fan and Spout - DEALER FABRICATED TOOLS
7.1 Dealer Fabricated Tools - INDEX
