John Deere 6620, 7720, and 8820 Hydraulic Repair - Technical Manual
Product Description
This is the "Hydraulic Repair" section from the 6620, 6620 SideHill, 7720, and 8820 technical manual. Covers section covers hydraulic pumps, valves, cylinders, motors, and more.
To purchase the complete technical manual go to this page.
Table of Contents
SPECIFICATIONS
RESERVOIR
HYDRAULIC PUMPS
Main Hydraulic Pump
- Removal and Disassembly
- inspection and Repair Assembly(6820 Com bone 565232- )
- Assembly
- Installation and Break-In
- Main Hydraulic Pump Torque Arm
- Hydraulic Pump Vibration
Hydraulic Drive Reel Of Belt Pickup Pump
- Removal
- Disassembly
- Inspection and Repair
- Assembly
- Installation
HYDRAULIC VALVES
- Removing and Installing
- Main Control Valve
- Relief Valve
- Reconditioning Spools
- Reconditioning Plunger Assembly
- Reconditioning
- Main Control Valve
- Adjusting Main Control Valve
- Linkage and Spools
- Making Spool Templates
- Cleaning POSI-TORQ Ground Drive
- Orifice Fitting
- Secondary Flow Control Rug
- Flow Control Valve for Hydraulic Drive Reel or Belt Pickup
- Removal
- Installation
- Reconditioning Flow Control Valve .
- Secondary Control Valve
- Removal
- Installation
- Reconditioning
- Secondary Control Valve
- Reconditioning Spools
- Reconditioning Ptunger Assembly
HYDRAULIC CYLINDERS
- Header Lift Cytnder
- Reel Lift Cylinders
- Unloading Auger Swing Cylinder
- Variable Speed Feeder House(SideHill 6620 Only)
HYDRAULIC MOTORS
Hydraulic Drive Reel Motor
- Removal and Repair
- Assembly and Installation
Hydraulic Drive Belt Pickup Motor
- Removal and Repair
- Assembly and Installation
ACCUMULATOR
- General Information
- Accumulator Service
- Shut-Of Valve
- Pressure Indicator Gauge
- Removing Pressure Indicator Gauge
- Installing Pressure Indicator Gauge
Manual Details
Pages: 64
Years and Serial Numbers: Covers all years and serial numbers
Models: 6620, SideHill 6620, 7720 , and 8820
Years and Serial Numbers Covered: 1953
Make: John Deere
Manual Code: TM-1202
Manual Type: Technical Manual, Service Manual
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