This is the COMPLETE Technical Manual for the John Deere 6620, Sidehill 6620 & 7720 & 8820 Combines. It contains deep information about maintaining, assembly, disassembly and servicing your John Deere 6620, Sidehill 6620 & 7720 & 8820 Combines. This manual contains information and data to this model. Has specs, diagrams, and actual real photo illustrations, color schemes. These technical manual is as good as it gets for Diagnosing, Repairing, and Maintenancing John Deere machinery. Models Covered: ========= John Deere 6620 Combine John Deere Sidehill 6620 Combine John Deere Sidehill 7720 Combine John Deere Sidehill 8820 Combine Technical Manual Contains: ========= SECTION 10 - GENERAL Group 00 - General Specifications Group 05 - Diagnosing and Testing Procedures Group 10 - Tune-Up and Adjustment SECTION 20 - ENGINE REPAIR Group 00 - Specifications and Special Tools Group 05 - Cylinder Head, Valves and Camshaft Group 10 - Block, Liners, Pistons, and Rods Group 15 - Crankshaft and Main Bearings Group 20 - Lubrication System Group 25 - Cooling System SECTION 30 - FUEL AND AIR REPAIR Group 00 - Specifications and Special Tools Group 05 - Air Intake System Group 10 - Diesel Fuel System Group 15 - Control Linkage SECTION 40 - ELECTRICAL REPAIR Group 00 - Specifications and Special Tools Group 05 - Harness Replacement Group 10 - Charging Circuit Repair Group 15 - Starting Circuit Repair Group 20 - Lights, Instruments, and Accessories SECTION 50 - POWER TRAIN REPAIR Group 00 - Specifications and Special Tools Group 05 - Clutch Group 10 - Transmission Group 15 - Differential Group 20 - Final Drive Group 25 - Sundstrand Hydrostatic Drive Group 26 - Eaton Hydrostatic Drive Group 30 - 4-Wheel Drive (Planetary Gearing) Group 31 - 4-Wheel Drive (Cam Lobe) Group 35 - Posi-Torq Ground Drive Group 40 - Tires and Wheels SECTION 60 - STEERING / BRAKES REPAIR Group 00 - Specifications and Special Tools Group 05 - Power Steering Group 10 - Brakes SECTION 70 - HYDRAULIC REPAIR Group 00 - Specifications Group 05 - Reservoir Group 10 - Hydraulic Pump Group 15 - Hydraulic Valves Group 20 - Hydraulic Cylinders Group 25 - Hydraulic Motors Group 30 - Accumulator SECTION 80 - SEPARATOR SHELL REPAIR Group 00 - Specifications Group 05 - Rear Hood Group 10 - Cylinder Rear Cover Group 15 - Separator Uprights SECTION 90 - OPERATOR STATION REPAIR Group 00 - Specifications and Special Tools Group 05 - Air Conditioning System Group 10 - Air Intake (Pressurizer) System Group 15 - Heating System Group 20 - Personal Posture Seat Group 25 - Miscellaneous Components SECTION 100 - HEADER REPAIR Group 00 - Specifications and Special Tools Group 05 - 200 and 900 Series Cuttong Platforms Group 10 - 40 Series Corn Heads Group 15 - 50, 50A Series Row-Crop Heads SECTION 110 - FEEDER HOUSE REPAIR Group 00 - Specifications and Special Tools Group 05 - Feeder Conveyour Chain Group 10 - Feeder Conveyour Drum Group 15 - Feeder House Drives and Reverser Gear Case Group 20 - Feeder House Drives (SideHill 6620 Combines) (-610300) Group 25 - Feeder House Paddies, Stripper and Front Closure Sheets (SideHill 6620 Combines) (-403300) Group 30 - Feeder Conveyour Chain, Upper Shaft, Paddle and Shaft, Conveyor Drum and Front Closure Sheets (SideHill 6620 Combines) (403301-) SECTION 120 - SEPARATOR REPAIR Group 00 - Specifications and Special Tools Group 05 - Cylinder, Concave, and Beater Group 10 - POSI-TORQ Cylinder Drive Group 12 - Dual-Range Cylinder Drive Group 15 - Straw Waikers and Crankshafts Group 20 - Straw Chopper and Straw Spreader Group 25 - Shoe Augers, Fan, and Shoe Frame Group 30 - Tallings Elevator and Augers Group 35 - Lower Auger, Clean Grain Elevator, and Grain Tank Loading Auger SECTION 130 - GRAIN TANK UNLOADING SYSTEM Group 00 - Specifications Group 05 - Grain Tank Cross Augers Group 10 - Vertical Auger and Bevel Gears Group 15 - Horizontal Auger and Gears SECTION 140 - MAJOR DRIVES REPAIR Group 00 - Specifications Group 05 - Engine Powershaft Group 10 - Primary Countershaft Group 15 - Secondary Countershaft SECTION 150 - SIDEHILL LEVELING SYSTEM REPAIR Group 00 - Specifications and Special Tools Group 05 - Electrical Components Group 10 - Hydraulic Components SECTION 160 - AUTPMATIC HEADER HEIGHT CONTROL REPAIR Group 00 - Specifications and Special Tools Group 05 - Repair of Components SECTION 220 - ENGINE OPERATION AND TESTS Group 00 - Specifications and Special Tools Group 05 - System Operation Group 10 - System Tests and Diagnosis SECTION 230 - FUEL / AIR OPERATION AND TESTS Group 00 - Specifications and Special Tools Group 05 - Air Intake System Group 10 - Diesel Fuel System Group 15 - Control Linkage SECTION 240 - ELECTRICAL OPERATION AND TESTS Group 00 - Specifications and Special Tools Group 05 - General Information and Diagnosis Group 06 - Eletrical System Diagnosis Group 10 - Charging Circuit Group 15 - Starting Circuit Group 20 - Lights, Instruments and Accessory Circuits SECTION 250 - POWER TRAIN OPERATION AND TESTS Group 00 - Specifications and Special Tools Group 05 - Clutch Diagnosis Group 10 - Transmission Diagnosis Group 15 - Final Drive Diagnosis Group 20 - Hydrostatic Drive Tests and Diagnosis Group 25 - 4-Wheel Drive Diagnosis (Planetary Gearing) Group 26 - 4-Wheel Drive (Cam Lobe) Group 30 - Posi-Torq Ground Drive Diagnosis SECTION 260 - STEERING / BRAKES OPERATION AND TESTS Group 05 - Power Steering Group 10 - Brakes SECTION 270 - HYDRAULIC OPERATION AND TESTS Group 00 - Specifications and Special Tools Group 01 - Hydraulic System Operation Group 05 - Hydraulic System Tests Group 10 - Reservoir Group 15 - Hydraulic Pumps Group 20 - Hydraulic Valves Group 25 - Hydraulic Cylinders Group 30 - Hydraulic Motors Group 35 - Accumulator SECTION 290 - OPERATOR STATION OPERATION AND TESTS Group 00 - Specifications and Special Tools Group 05 - Air Conditioning System Group 10 - Heating System SECTION 350 - SIDEHILL LEVELING SYSTEM OPERATION AND TESTS Group 00 - Specifications and Special Tools Group 05 - General Information, Diagnosis, and Tests Group 10 - Electrical System Group 15 - Hydraulic System SECTION 360 - AUTOMATIC HEADER HEIGHT CONTROL OPERATION AND TESTS Group 00 - Specifications and Special Tools Group 05 - General Information, Diagnosis, and Tests Group 10 - Mechanical System Group 15 - Electrical System Group 20 - Hydraulic System Group 25 - General Information, Diagnosis, and Tests - DIAL-A-MATIC Group 30 - Mechanical System - DIAL-A-MATIC Group 35 - Electrical System - DIAL-A-MATIC Group 40 - Hydraulic System - DIAL-A-MATIC ========== ** Model Specification: John Deere 6620, Sidehill 6620 & 7720 & 8820 Combines ** Publication number: TM1202 ** Language: English ** Total Pages: 1922 ** File Format: PDF ** Requirements: Adobe PDF Reader ** Compatible: All Versions of Windows & Mac, Linux OS, Iphone, Ipad, Android etc... =========== This QUALITY manual is 100 percents COMPLETE and INTACT, no MISSING/CORRUPT pages/sections to freak you out! It also is Bookmarked and SEARCHABLE to make what you need easy to find. Complete download comes in PDF format which can work under all PC based Windows operating system and Mac also. It saves to your hard-drive and can be burned to CD-ROM. It can be viewed on any computer, as well as zoomed and printed. INSTANT DOWNLOAD MEANS THERE IS NO SHIPPING COSTS or WAITING FOR A CD or PAPER MANUAL TO ARRIVE IN THE MAIL. YOU WILL RECEIVE THIS MANUAL TODAY VIA INSTANT DOWNLOAD ON COMPLETION OF PAYMENT VIA OUR SECURE PAYMENT PROCESSOR. WE ACCEPT ALL MAJOR CREDIT/DEBIT CARDS AND PAYPAL. BUY FROM US AND I GUARANTEE YOULL BE A SATISFIED CUSTOMER AND CONTACT US IF YOU HAVE ANY QUESTIONS. Looking for some other Service Repair Manual, please check: