Description
John Deere No 12 A Operator Manual for the No. 12-A Straight-Through Combine with 66-inch cut provides the operating, adjustment, lubrication and maintenance information needed to use and care for this combine correctly. It is written specifically for machines from serial number 12-65519 onward and covers the settings and working adjustments required for harvesting operations.
This operator’s manual explains the combine’s principal working units, field operation and crop-handling arrangements. It includes guidance for setting up and breaking in the machine, starting work in the field, adjusting the cutting and feeding equipment, setting the threshing and cleaning systems, caring for belts and drive components, and preparing the combine for storage after the season.
WHAT THIS MANUAL CONTAINS
- Identification and machine data – identification information, specifications and operating data for the John Deere No. 12-A Straight-Through Combine with 66-inch cut.
- Lubrication – lubrication requirements and service points for keeping the combine’s working assemblies in proper operating condition.
- Setting up and breaking in the new combine – preparation of the combine before use and the recommended breaking-in procedure.
- Starting in the field – operating guidance for getting the combine working correctly at the beginning of field operations.
- Factory settings for small grain – approximate factory settings for combine operation in small-grain crops.
- Combine operating adjustments – adjustments affecting the operation and performance of the complete combine.
- Reel operating adjustments – positioning and operating adjustments for the reel to suit harvesting conditions.
- Reel special equipment – information covering additional or special reel equipment.
- Cutter bar and dividers – operation and adjustment of the cutter bar and crop-dividing equipment.
- Cutter bar and divider special equipment – special equipment associated with the cutter bar and dividers.
- Platform and canvas – platform components and canvas arrangements used to carry crop into the feeder.
- Feeder canvas – operation and adjustment information for the feeder canvas.
- Cylinder – cylinder operation and adjustment within the threshing system.
- Cylinder special equipment – details relating to special cylinder equipment.
- Concave rasp bar and grate – threshing concave components, rasp bars and grate arrangements.
- Concave rasp bar and grate special equipment – special equipment and arrangements for the concave and grate.
- Beater behind cylinder – the beater assembly positioned behind the cylinder and its role in crop handling.
- Deflector curtains behind the beater – the two deflector curtains fitted to the rear of the beater.
- Straw rack – straw-rack operation and adjustment within the separation system.
- Cleaning units – the combine cleaning system and its operating arrangements.
- Cleaning fan – fan operation and adjustment for cleaning harvested material.
- Cleaning shoe – cleaning-shoe operation and adjustment.
- Cleaning shoe special equipment – special cleaning-shoe equipment and associated arrangements.
- Clean-grain and tailings elevators – elevator components and the handling of clean grain and tailings.
- Slip clutches – slip-clutch operation and protection of the combine drives.
- Power line and main drive gear case – the main power line and drive gear-case arrangements.
- V-belts and care of V-belts – belt operation, maintenance and care to help preserve correct drive performance.
- Care of engine-equipped combines – care information for combines fitted with an engine.
- End-of-season care – procedures to follow when the harvesting season is over.
- Field operation – practical operating information for working the combine in the field.
- Fundamentals of combine harvesting – basic harvesting principles for obtaining effective combine performance.
- Combining various crops – operating considerations for harvesting different crops.
MODELS COVERED
John Deere No. 12-A Straight-Through Combine with 66-inch cut, serial number 12-65519 and up.
MANUAL DETAILS
Manufacturer: John Deere
Model: No. 12-A Straight-Through Combine
Machine type: Combine harvester
Manual type: Operator’s manual
Publication number: OMH31148
Serial range: 12-65519 and up
Page count: 152 pages
Format: Digital PDF
Language: English
The John Deere No 12 A Operator Manual is suitable for owners and operators who need a structured reference for combine setup, harvesting adjustments, lubrication, component care and seasonal maintenance on the specified No. 12-A machine.
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