TM2167 John Deere 1290, 1291, 1293, 494, 592, 692, 693, 694, 892, 893 and 894 Corn Heads Pdf Technical Service Manual

TM2167 John Deere 1290, 1291, 1293, 494, 592, 692, 693, 694, 892, 893 and 894 Corn Heads Technical Service Manual PDF

Harvesting corn subjects your combine's front-end equipment to immense abrasive wear, continuous vibration, and extreme mechanical torque. The John Deere Corn Heads Technical Manual (TM2167) is the comprehensive factory workshop document designed to cover a massive fleet of John Deere harvesting attachments, ranging from the classic 4-row 494 to the massive 12-row 1293. Pulling thousands of acres of tough stalks requires gathering chains, snapping rolls, and row-unit gearboxes to function in perfect mechanical harmony. This technical service manual provides farm mechanics and agricultural technicians with the precise, step-by-step disassembly, physical inspection, and reassembly data needed to restore these essential harvesting tools to their original manufacturing tolerances.

Manual Technical Specifications

Manual Title	John Deere 1290, 1291, 1293, 494, 592, 692, 693, 694, 892, 893, 894 Corn Heads Technical Manual
Manual Number	TM2167
Equipment Type	Agricultural Combine Attachment / Row-Crop Header
Manual Type	Service Repair Technical Manual
Models Covered	1290, 1291, 1293, 494, 592, 692, 693, 694, 892, 893, 894
Key Systems Covered	Row Unit Gearboxes, Stalk Rolls, Gathering Chains, Auger, Drives
File Format	Digital PDF (Searchable and Printable)
Language	English
Delivery Method	Instant Download After Payment

The Value of Factory-Grade Harvesting Data

An improperly timed stalk roll or a poorly shimmed gearbox can result in massive ear loss in the field or catastrophic driveline failure that stops your combine in its tracks. Relying on the official Service Repair Technical Manual ensures every row unit processes the crop efficiently.

• Minimize Ear Loss: Precise factory specifications for deck plate spacing and gathering chain tension ensure ears are snapped cleanly and delivered to the auger, not dropped on the ground.
• Protect Your Combine: Correct slip clutch calibration and driveline maintenance documented in this manual prevent header jams from transferring destructive torque back into the combine's feeder house.
• Streamline Winter Rebuilds: The searchable digital format allows you to instantly find the exact bearing preloads or torque sequences needed when overhauling row units in the off-season.

Core Mechanical System Overhauls

This factory document is engineered specifically for practical shop application, focusing deeply on the heavy iron and moving components of the corn head:

• Row Unit Gearboxes: Complete step-by-step repair guides for tearing down the row unit gear cases. Includes critical shimming data, gear backlash adjustments, and bearing replacements necessary for smooth operation.
• Stalk Rolls and Deck Plates: Detailed service procedures for replacing worn snapping rolls, timing the flutes correctly, and adjusting the mechanical deck plates to accommodate varying stalk thicknesses.
• Gathering Chains and Idlers: Instructions for measuring chain wear, replacing drive sprockets, and rebuilding the spring-loaded idler tensioners to prevent chain jumping.
• Cross Auger and Trough: Overhaul data for the massive cross auger, including flighting repair, slip clutch adjustment, and replacing the heavy-duty end bearings.
• Main Drives and Frame: Guidelines for servicing the primary PTO drivelines connecting the header to the combine, along with inspection criteria for the main tubular frame weldments.

Download the JD Corn Heads TM2167 Manual PDF

Do not let a failed row unit stall your harvest. Download the John Deere 494 to 1293 Series Corn Heads TM2167 Technical Manual instantly at Manualsmarket.com. You can also browse our extensive library of harvesting implement documentation in the John Deere Service Manual Collection. This TM2167 PDF download equips farm owners and mobile technicians with the authentic factory procedures needed to replace gathering chains, rebuild gearboxes, and maintain the heavy-duty mechanical components of these classic John Deere corn heads.

Frequently Asked Questions

Are there electrical wiring diagrams or Diagnostic Trouble Codes (DTCs) located in this TM2167 manual?
No. Following John Deere's strict publication guidelines, the Service Repair Technical Manual is solely dedicated to the physical teardown, mechanical repair, and component assembly of the machine. If you require Schematic Wiring Diagrams or a guide for diagnosing electronic DTCs (such as those for automated header height sensors), you must consult the separate John Deere Diagnostic, Operation, and Test manual.

Does this manual show how to rebuild the combine's engine?
No. Corn heads are attachments powered entirely by the combine harvester's feeder house drives. Because this harvesting implement does not have its own onboard engine, engine overhaul data is not applicable or included in this manual.

Does this single manual actually cover all eleven of these different corn head models?
Yes. The TM2167 encompasses this massive range of models because the fundamental mechanical architecture of the row units and drives are shared across the 40, 90, 93, and 94 series. The manual specifically notes variations in frame width, auger length, and driveline configurations depending on the row count.

Can I print specific gearbox rebuild charts from this downloaded PDF?
Absolutely. The manual is delivered as a high-quality, fully searchable digital PDF. You can easily search for a keyword like "row unit gearcase" and print just the specific mechanical diagrams or shimming charts needed for your workbench, keeping your laptop clean of shop grease.