Target Audience:
Farmers and agricultural businesses requiring a powerful row-crop tractor
Era Context:
Introduced in the mid-1950s to compete with other two-plow tractors in the market
Key Advantages:
Known for durability, power, and versatility in the field
Design:
Rugged construction suitable for heavy tillage
Engine:
Available with either gasoline or diesel engine options
Transmission:
Standard gear transmission with multiple speeds forward and reverse
Hydraulics:
Equipped with live hydraulics and three-point hitch
Complete Service:
Covers all aspects of repair and maintenance for the John Deere 820 tractor
Systems Covered:
Engine, transmission, hydraulics, electrical, steering, brakes, and more
Page Count:
Approximately 500 pages
Manual Type:
Service Technical Manual
Format:
PDF (Portable Document Format)
Delivery Method:
Instant download after purchase
Engine:
Complete engine overhaul, disassembly, inspection, and reassembly
Transmission:
Gearbox removal, inspection, and repair procedures
Hydraulics:
Hydraulic system components, pumps, valves, and cylinders
Electrical:
Wiring diagrams, starter, generator, and lighting systems
Steering:
Steering column, gearbox, and tie rod adjustments
Brakes:
Brake system overhaul and adjustment
Power Take-Off (PTO):
PTO assembly and clutch repair
Fuel System:
Fuel tank, lines, filters, and carburetor or injection pump
Cooling System:
Radiator, water pump, thermostat, and hoses
Clutch:
Clutch adjustment and replacement
Final Drives:
Differential and final drive service
Wheels and Tires:
Wheel removal, tire changing, and inflation pressures
Body and Chassis:
Frame, sheet metal, and mounting points
Procedures and Diagnostics
Troubleshooting:
Diagnostic symptoms and possible causes for common issues
Overhaul Procedures:
Step-by-step instructions for major components
Testing and Adjustment:
Procedures for testing components and making necessary adjustments
Specifications:
Detailed torque specs, clearances, and tolerances
Level:
Comprehensive and detailed, written for professional technicians and skilled DIYers
Illustrations:
Includes diagrams, exploded views, and photographs to aid understanding
Part Numbers:
OEM part numbers referenced throughout for correct replacement parts
Exploded Diagrams:
Parts breakouts for ordering individual components
Compatibility:
Works on all platforms that support PDF viewing (Windows, Mac, Linux, iOS, Android)
Requirements:
PDF reader software such as Adobe Acrobat, Foxit Reader, or similar
Searchability:
Text is searchable for quick navigation
Resolution:
High-resolution images and diagrams for detailed viewing
Page Quality:
Clean, legible text and graphics
Engine Types:
Gasoline and diesel options available
Displacement:
376 cubic inches (6.2 L) for both gasoline and diesel
Horsepower:
Approximately 50 drawbar horsepower and 56 PTO horsepower (gasoline)
Torque:
N/A - not specified in available references
Fuel Type:
Gasoline or diesel depending on model
Carburetion/Injection:
Gasoline models used a carburetor; diesel models used a fuel injection pump
Oil Change:
Every 100 hours of operation
Transmission and Hydraulic Oil:
Every 500 hours
Engine Oil:
SAE 30 or 10W-30 (API service classification)
Transmission/Hydraulic Fluid:
John Deere Hy-Gard or equivalent
Coolant:
Ethylene glycol-based antifreeze mixture
Common Wear Items:
Clutch components, hydraulic seals, and electrical contacts
Heritage:
Founded in 1837, known for reliable farm equipment
Previous Model:
John Deere 820 succeeded the Model 80
Successor:
The 820 was replaced by the John Deere 830 and later 840
Plant:
Manufactured in Waterloo, Iowa, USA
