Description
John Deere 6620 Combine Service Manual is a detailed service and technical manual for the John Deere 6620, Sidehill 6620, Sidehill 7720 and Sidehill 8820 combines. It combines repair information with system operation, testing, diagnosis, specifications, adjustment information and special tool references for the combine systems listed in the contents.
This manual is intended for workshop servicing, fault diagnosis and component repair. Coverage extends from the engine, fuel and electrical systems through the power train, hydraulics, separator, feeder house, header, grain tank unloading system, sidehill levelling system and automatic header height control.
WHAT THIS MANUAL CONTAINS
- General information – general specifications, diagnosing and testing procedures, tune-up information and adjustment procedures.
- Engine repair – specifications and special tools; cylinder head, valves and camshaft; block, liners, pistons and connecting rods; crankshaft and main bearings; lubrication system; and cooling system.
- Fuel and air repair – air intake system, diesel fuel system and control linkage, with related specifications and special tools.
- Electrical repair – harness replacement, charging circuit repair, starting circuit repair, lights, instruments and accessory circuits.
- Power train repair – clutch, transmission, differential, final drive, Sundstrand hydrostatic drive, Eaton hydrostatic drive, four-wheel drive planetary gearing, four-wheel drive cam-lobe systems, Posi-Torq ground drive, tyres and wheels.
- Steering and brake repair – power steering and brake systems, including specifications and special tool information.
- Hydraulic repair – reservoir, hydraulic pump, hydraulic valves, hydraulic cylinders, hydraulic motors and accumulator.
- Separator shell repair – rear hood, cylinder rear cover and separator uprights.
- Operator station repair – air-conditioning system, pressuriser air intake system, heating system, personal posture seat and miscellaneous operator-station components.
- Header repair – 200 and 900 Series cutting platforms, 40 Series corn heads, and 50 and 50A Series row-crop heads.
- Feeder house repair – feeder conveyor chain, conveyor drum, feeder house drives, reverser gear case and Sidehill 6620 feeder house assemblies. The listed groups include drive variations, paddles, stripper components, front closure sheets, upper shaft and conveyor components.
- Separator repair – cylinder, concave and beater; Posi-Torq cylinder drive; dual-range cylinder drive; straw walkers and crankshafts; straw chopper and straw spreader; shoe augers, fan and shoe frame; tailings elevator and augers; lower auger, clean grain elevator and grain tank loading auger.
- Grain tank unloading system repair – grain tank cross augers, vertical auger and bevel gears, horizontal auger and gears.
- Major drives repair – engine powershaft, primary countershaft and secondary countershaft.
- Sidehill levelling system repair – electrical components and hydraulic components, with specifications and special tool references.
- Automatic header height control repair – repair of the system components, with specifications and special tools.
- Engine, fuel and air operation and tests – engine system operation, system tests and diagnosis, air intake system, diesel fuel system and control linkage.
- Electrical operation and tests – general information and diagnosis, electrical system diagnosis, charging circuit, starting circuit, lights, instruments and accessory circuits.
- Power train, steering, brake and hydraulic testing – clutch, transmission, final drive, hydrostatic drive, four-wheel drive, Posi-Torq ground drive, power steering, brakes and hydraulic system operation, tests and diagnosis.
- Sidehill and automatic header height control operation and tests – general information, diagnosis and tests for electrical, mechanical and hydraulic systems, including DIAL-A-MATIC electrical, mechanical and hydraulic system sections.
MODELS COVERED
- John Deere 6620 Combine
- John Deere Sidehill 6620 Combine
- John Deere Sidehill 7720 Combine
- John Deere Sidehill 8820 Combine
MANUAL DETAILS
Manufacturer: John Deere
Machine Type: Combine harvesters
Manual Type: Service Technical Manual
Publication / Manual Number: TM1202
Format: Digital PDF
Language: English
The John Deere 6620 Combine Service Manual is organised around dedicated repair sections and corresponding operation-and-test sections, making it useful for both component work and systematic troubleshooting. It covers mechanical, hydraulic and electrical systems across the listed combines, including the specialist Sidehill levelling and automatic header height control systems.
WHAT HAPPENS AFTER PURCHASE?
After purchase you will instantly receive our download information file by email. Your manual will then be manually checked and sent to the email address used during checkout, usually within minutes and normally within 1 hour.
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