John Deere 6620 | 7720 | 8820 Combine Operators Manual

John Deere

MODEL:

6620 Combine S/n 0-551,900

7720 Combine S/n 0-551,900

8820 Combine S/n 0-551,900

THIS IS A MANUAL PRODUCED BY JENSALES INC. WITHOUT THE AUTHORIZATION OF

JOHN DEERE OR IT'S SUCCESSORS. JOHN DEERE AND IT'S SUCCESSORS

ARE NOT RESPONSIBLE FOR THE QUALITY OR ACCURACY OF THIS MANUAl.

TRADE MARKS AND TRADE NAMES CONTAINED AND USED HEREIN ARE THOSE OF OTHERS,

AND ARE USED HERE IN A DESCRIPTIVE SENSE TO REFER TO THE PRODUCTS OF OTHERS.

JD-O-OMH111330

6620,

SIDE HILL 6620,

7720,

AND 8820

COMBINES

OPERATORS MANUAL

6620, SIDE HILL 6620, 7720, AND

8820 COMBINES

OMH111330 11

HARVESTER WORKS

OMH11133011

English

1

Contents

Page

Contents ............................... 1

Safety ................................. 2

Operator's Station ....... . ............. . .. 6

Engine Break-In..........................18

Prestarting Checks........................19

Operating the Engine......................21

Driving the Combine ......................26

Transporting ............................29

Lighting and Signals ......................30

Fuels and Lubricants ......................32

Lubrication and Maintenance ................38

Fundamentals of Combine Harvesting.......... 51

Headers ...............................63

Feeder House ...........................67

Separator .............................124

Grain Tank and Unloading Auger ............178

Engine Service .........................186

Electrical System........................202

Monitors ..............................208

Hydraulic System........................213

SideHill Leveling System ..................217

Power Train............................224

Air Conditioner and Heater.................252

Trouble Shooting ........................257

Storage...............................279

Specifications ..........................282

Index................................. 290

Engine Break-in

Engine Break-in

The engine is ready for normal operation. Be extra

cautious during the first 100 hours.

1. Avoid unnecessary engine idling.If combine will be

idling longer than five minutes, stop the engine.

2. Watch coolant temperature gauge closely. If tem?

perature rises to green with white striped warning

zone, shift to a lower gear or reduce load. Unless

temperature quickly drops, stop engine and deter?

mine cause.

A-Black Zone

B-Green Zone

C-Green with White Stripes

D-Red Zone

3. Check engine oil and coolant levels frequently.

Watch for any signs of leaks.

4. Until you become thoroughly familiar with the sound

and feel of your new combine, be extra alert.

After 1 Hour of Operation Check Torque

on All Wheel Bolts:

Drive Wheels 300 ft-lbs (400 N¡¤m)

Steering Wheels 150 ft-lbs (203 N¡¤m)

Engine Oil Dipstick

Radiator Cap

After 5 Hours of Operation

Check all V-belts for initial stretch. Tighten as neces?

sary.Continue to check V-belts every few hours for the

first 50 hours. Check alternator belt and adjust if nec?

essary.

Torque the eight 3/4-inch machine bolts attaching

separator uprights to drive wheel axle:

Side Hill 6620 .............. 300 ft-lbs (407 N¡¤m)

6620, 7720 and 8820........200 ft-lbs (271 N¡¤m)

After 100 Hours of Operation

Drain crankcase oil, change filter, and refill. See lubri?

cation section. Repeat this procedure every 200 hours

or once a season, whichever occurs first.

Feeder House

Replacing Upper Belt

1. Pull out on bottom of shield, then remove.

2. Loosen nuts (A).

3. To loosen idler, hold nut (8) with a wrench and turn

adjusting bolt (C) until hole (E) moves down from

gauge (D).

A-Nuts

B-Nut

C-Adjusting Bolt

D-Gauge

E-Hole

4. When idler is loose remove cap screw (F) and

shield with sheave.

5. Remove belt.

6. Replace belt. See belt adjustment next page.

F-Cap Screw

Replacing Lower Belt

1. Loosen lock nut to back off tension on idler.

2. Lift up on lower tightener and slide lower belts out.

3. Replace belt.

115

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