John Deere 6620, 6620 SideHill 7720, and 8820 Engine Repair - Technical Manual

John Deere 6620, 6620 SideHill 7720, and 8820 Engine Repair - Technical Manual

  • Engine Repair


This is the 85 page "Engine Repair" section of for the 6620, 7720, and 8820 technical manual

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  • Table of Contents

  • Manual Details

  • How FMF Works

  • Printing Tips

This is the 85 page "Engine Repair" section of for the 6620, 7720, and 8820 technical manual.  To purchase the complete technical manual go to this page.


Table of Contents


  • Specifications
  • Special Tools


  • Preliminary Valve Checks
  • Rocker Arm Cover
  • Checking Valve Clearance
  • Checking Valve Lift
  • Cylinder Head and Valves
  • Rocker Assembly
    • Removal
    • Inspection and Repair
    • Assembly and Installation
  • Valves. Valve Springs. Valve Rotators, and Wear Caps
    • Removal
    • Inspection and Repair
    • Valve Springs
    • Valves, Rotators and Wear Caps
    • Valve Guides
    • Valve Seat Inserts
  • Cylinder Head
    • Assembly
    • Installation
  • Camshaft
    • Checking Camshaft End Play
    • Removal
    • Thrust Plate
    • Assembly
    • Installation


  • Diagnosing Malfunctions
  • Pistons
    • Access 
    • Removal
    • Inspection and Repair
      • Piston Rings and Ring Grooves
      • Piston Head. Ring Lands and Piston
      • Skirt
      • Piston Pins
  • Connecting Rods
    • Removal
    • Inspection and Repair
    • Connecting Rod Bearings
  • Cylinder Liners
    • Removal, Inspection, and Repair
    • Deglazing Cylinder Liners
  • Block


  • Diagnosing Malfunctions
  • Access 
  • Inspection and Repair
    • Damper Pulley
    • Front Wear Sleeve
    • Crankshaft Gear 
    • Flywheel
    • Rear Crankshaft Oil Seal. Housing a
    • Wear Sleeve 
    • Main Bearings
    • Thrust Bearings
    • Crankshaft Journals
  • Installation
    • Main Bearings and Crankshaft
    • Rear Wear Sleeve
    • Rear Oil Seal and Housing
    • Crankshaft Gear, Front Wear Sleeve and Oil Seal


  • Diagnosing Malfunctions
  • Removal, Inspection and Repair
    • Oil Filter Housing
    • Oil Cooler
    • Oil Pump
    • Oil Pump Gears
  • Assembly and Installation
    • Oil Cooler By-Pass Valve 
    • Oil Pump


  • Diagnosing Malfunctions
  • Radiator
    • Removal
    • Inspection 
    • Installation
  • Radiator Cap
  • Dual Pressure Regulating Switch Water Pump
    • Removal
    • Inspection 
    • Assembly
    • Installation
  • Water Manifold and Thermostats Radiator Fan
  • Repair-6620, SideHill 6620 and 7720 Combines
    • Removal
    • Installation
  • Repair-8820 Combines
  • Removal
  • Installation
  • Radiator Fan Drive Support (8820 Combines)
    • Removal
    • Installation
  • Radiator Fan Drive Idler Hub Repair-6620. SideHill 6620 and 7720 Combines
  • Radiator Fan Drive Idler Pivot Bushings (8820 Combines)
    • Removal
    • Installation
  • Rotary Cooling Screen
  • General Information
  • Opening and Closing Rotary
  • Screen Door 
  • Rotary Screen Drive Shaft
  • Rotary Screen Drive Belt Tightener
  • Repair-6620. 6620 SideHill and 7720 Combines
  • Repair-8820 Combines
  • Rotary Screen
    • Removal
    • Installation
  • Correcting Plugging of the Rotary Cooling Screen 
  • Engine Coolant Heater

6620, SideHill 6620, 7720 , and 8820
John Deere
Manual Code:
Manual Type:
Service Manual, Technical Manual

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