Description
This 340 page, John Deere 6620 operator manual ensures that owners and operators of 6620, SideHill 6620, 7720, and 8820 combines have a comprehensive, easy-to-follow reference. This reproduction of the original owner’s guide includes safety instructions, operating tips, maintenance schedules, and troubleshooting details tailored to these combine models.
This operator manual covers:
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Safety precautions and warnings
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Operator’s station layout and controls
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Engine break‑in and prestart checklists
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Driving, steering, transport procedures
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Fuel, lubrication, maintenance charts
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Harvesting fundamentals (headers, feeder house, separator)
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Grain tank and unloading auger operations
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Electrical, hydraulic, sidehill leveling, powertrain systems
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Storage, winterization, and long‑term care
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Trouble‑shooting tips and diagnostic flowcharts
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Full specifications and index
Why this manual matters
Many owners of John Deere 6620 (including SideHill, 7720, 8820 variants) face recurring issues like clogged headers, hydraulic leaks, leveling errors, and electrical faults. Having the John Deere 6620 operator manual gives you instant access to correct setup procedures, adjustment specs, and repair approaches.
For example, the sidehill leveling system often requires periodic calibration; without the proper instructions, operators may misadjust and stress components prematurely. Similarly, improper lubrication or misreading maintenance intervals can lead to engine wear or separator slippage. This manual prevents mistakes by providing exact tolerances, torque specs, and step-by-step procedures.
Whether you’re diagnosing a misbehaving sensor, adjusting the feeder chain, or preparing your combine for winter storage, the operator manual is your essential guide. Use it daily in the field or keep it in your shop for reference. The layout is user-friendly, with illustrations, cross-references, and a helpful index.
This edition is a high‑quality reproduction of the original manual that shipped with new machines. It’s ideal for farmers, custom harvesters, repair shops, and collectors who need the correct documentation for operation and maintenance.
For the following machines:
6620 Combine (Ser. No. 600001- 609999)
Sidehill 6620 (Ser. No. 600001- 609999)
7720 Combine (Ser. No. 600001- 609999)
8820 Combine (Ser. No. 600001- 609999)
Contents
Safety
Operators Station
Engine Break-ln
Prestarting Checks
Operating the Engine
Driving the Combine
Transporting
Lighting and Signals
Fuels and Lubricants
Lubrication and Maintenance
Fundamentals of Combine Harvesting
Headers
Feeder House
Separator
Grain Tank and Unloading Auger
Engine Service
Electrical System
Monitors
Hydraulic System
SideHill Leveling System
Power Train
Air Conditioner and Heater
Trouble Shooting
Storage
Specifications
Index of Topics
