Part of the John Deere Repair Manuals.
This 292-page John Deere technical manual PDF (OEM TM1402S) covers diagnostics and repair for Maximizer combines. You get full wiring diagrams, hydraulic solenoid control valve stack schematics, and a full troubleshooting section spanning Bosch Type C engine control, concave position adjust, and Dial-A-Matic Types A, B, and C. Contour Master feeder house repair gets its own treatment: tilt cylinder, tilt frame, platform driveshafts, and lockout kit installation. Reinstalling that valve stack? Studs get 16 N·m (96 lb-in.), and the air suspension seat assembly weighs 29 kg (65 lbs), so grab a second set of hands. A combine down mid-harvest costs you acres by the hour. Bookmarked PDF opens on laptop, tablet, or phone; jump straight to the section you need and start wrenching.
What's Inside This John Deere 9400-9600 Series Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 7-10 | Group 05, Safety, Recognize Safety Information, Understand Signal Words, Live with Safety |
| Power Train Repair | 11-22 | Group 20 |
| Hydraulic Repair | 23-28 | Group 05, Hydraulic Solenoid Control Valve Stack (Repair, Remove and Install Solenoid Control Valve Stack, Disassemble and Assemble Solenoid Control Valve Stack) |
| Operator Station Repair | 29-46 | Group 20, Cab (Disassemble and Repair Seat Air Suspension, Install Air Suspension Frame), Disassemble and Repair Seat Air Suspension, Assemble Scissors Frame |
| Contour Master Feeder House Repair | 47-84 | Platform Driveshafts (Contour Master Platform Driveshafts, Feeder House Drive Shields and Safety Stop) |
| Seperator | 85-96 | Tilt Beam, Tilt Frame, Lower, Install, Tilt Cylinder, Contour Master |
| Grain Tank and Unloading System Repair | 97-114 | Group 25 |
| Engine Control Unit (Inj. Pump) System Identification | 117-120 | Brief Description, ECU Identification |
| Bosch Engine Control Diagnostics, Type C | 121-152 | System Identification, Brief Description, Detailed Description, Basic Operation |
| Concave Position Adjust Diagnostics | 153-204 | Brief Description, Basic Operation, Detailed Description |
| Dial-A-Matic Diagnostics | 205-208 | How to Use Electrical Diagnostics |
| Dial-A-Matic Diagnostics, Type a | 209-222 | Group 5AL, Brief Description, Basic Operation, Detailed Description |
| Dial-A-Matic Diagnostics, Type B | 223-236 | Brief Description, Detailed Description |
| Dial-A-Matic Diagnostics, Type C | 237-252 | Basic Operation, Component Location, Schematic Section Information Description |
| Contour Master Tilt Control System Identification | 253-254 | System Identification, Type a, Type B |
| Contour Master Type a Diagnostics | 255-268 | Brief Description, Detailed Description, Flex Platforms (Contact Sensors), Header Lateral Tilt Control Diagnostics |
| Contour Master Type B Diagnostics | 269-278 | Brief Description, Detailed Description, Rigid Platforms and Cornheads |
| Combine Data Center Diagnostics | 279-290 | How to Use Electrical Diagnostics, Basic Information Warnings for Vehicles Equipped with Computer Controlled Systems, Electrical Connector Handling, Front Panel English Version |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Torque studs | 16 N·m (96 lb-in.) | p. 27 |
| Approximate weight of air suspension seat assembly | 29 kg (65 lbs) | p. 31 |
John Deere 9400-9600 Series Common Problems This Manual Covers
John Deere 9500 combine won't move forward or reverse, hydro handle pushed but no drive response
Check the hydraulic reservoir level first; low oil starves charge flow and kills drive in both directions. Inspect every line and O-ring for leaks, then bleed air from the system. If you crack lines loose at the solenoid control valve stack, torque the studs to 16 N·m (96 lb-in.) on reinstall; the spec is on page 27.
Manual Section: Power Train Repair p. 11Engine hard to start or won't start, cranks fine but no fire on cold mornings
Drain the water separator and replace the fuel filter (part AT81478) before blaming injectors; contaminated fuel triggers most no-start calls on these machines. Bleed air from the fuel system after the filter change. On Bosch Type C engines, pull stored ECU error codes with the recall procedure starting on page 121 and work the flowcharts from there.
Manual Section: Bosch Engine Control Diagnostics, Type C p. 121Contour Master header won't level on side slopes, tilt hunts back and forth constantly
Verify which tilt control type you have before ordering parts; the identification tables on page 253 separate Type A from Type B. Test the contact sensors on flex platforms with the Type A flowcharts starting on page 255; rigid platforms and cornheads run ultrasonic sensors, covered from page 269. Clean sensor faces and reseat connectors before condemning any controller.
Manual Section: Contour Master Tilt Control System Identification p. 253Air suspension seat sags to the floor and won't hold ride height adjustment
Inspect the air suspension for leaking bags and worn scissors frame pivots before pulling the seat. Get a second set of hands or a hoist; the seat assembly weighs 29 kg (65 lbs), noted on page 31. Follow the disassembly and repair procedure in the Operator Station Repair section starting on page 29, then rebuild the scissors frame.
Manual Section: Operator Station Repair p. 29Frequently Asked Questions
How to reset error code on John Deere combine?
To clear stored error codes on a John Deere combine, first locate diagnostic connector C728 J4 (6-Pin Weather Pack Tower) at the ECU. With the key switch OFF, install a jumper wire between pins B, C, and F of this connector. Turn the key switch to the IGN position for at least five seconds, then turn the key switch OFF. The stored ECU codes will then be cleared. p. 122
What is the torque specification for the tilt frame mounting hardware?
The torque specification for the tilt frame mounting hardware is 315 N·m (230 lb-ft). This ensures proper securement of the tilt frame components during assembly and repair. p. 57
What is the approximate weight of the combine's tilt frame?
The approximate weight of the combine's tilt frame is 95 kg (209 lbs). This information is crucial for safe removal and installation procedures, requiring appropriate lifting equipment. p. 62
What is the torque specification for the bolt through the front of the feederhouse?
The torque specification for the bolt through the front of the feederhouse is 610 N·m (450 lb-ft). Applying the correct torque is essential for the structural integrity of the feederhouse assembly. p. 57
What is the approximate weight of the operator's seat air suspension assembly?
The approximate weight of the operator's seat air suspension assembly is 29 kg (65 lbs). This weight should be considered when handling the assembly to prevent injury during disassembly or repair. p. 31
How will I receive this John Deere Combine Technical Manual?
You get a 292-page scanned PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Are there any print restrictions on this John Deere Combine manual?
Yes, print as many copies as you want, and there are no restrictions. Many mechanics print the section they need and bring it to the shop floor.
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