John Deere 7720 Combine Service Repair Manual Instant Download (TM1202)

1
6620, Sidehill 6620
7720 and 8820
-
Combines
UHN OEERE
TECHNICAL MANUAL 6620, Sidehill 6620 7720 and
8820 Combines TM1202 (01JAN88) English
0 1 J A N 8 8
John Deere Harvester Works TM1202 (01JAN88)
T M 1 2 0 2
uno in u.ax ENGM9H
2
6620, SIDEHILL 6820, 7720 AND 8820
COMBINES TECHfdcAL MANLIAL
SECTION 10 GENERAL Group 00 General
Specifcatious
SECTION BO - SEPARATOR SHELL REPAIR Oroup 00 -
Sgeoficatioris Group 05 - Rear Hood Group 10 -
Cylinder Raar Cover Group 15 - Separator
Llprights SECTION 90 - OPERATOR STATION
REPAIR Oroup 00 Specif\cati and Sgec Tools
Group 05 - Air Conditonfng System Ofoup 10 - AP
IntaAe (Presaurizer) System Group 15 - Heating
System Oroup 2D - Personal Posture Seat Group 25
- Miscellaneous Components SECTIOFI 100 - L2ADER
REPAIFI Grow 00 - SpecifiCat\one and SpeCtel
TcoI9 Group 05 200 arid 900 Series Cuttñg
Ratforms ñ?mtp 10 40 Serios Coun Hea0s Ooup
15 50, SOA Series Row p Haads SECTION 110 -
FEEDER HOUSE REPAIR Droup 00 Specifications and
Special Tods Group OS - Feeder Conveyor
Chen GroUp 10 - Feeder Conveyor Drum Droup 15 -
Feeder House Drives and Reverser Geer Case Group
20 - Feader HouBe Drive6 SideHig 662D
Group 05 Orpup 10
Diagnosing arid Testing Prxmdures TuneUpand
Adjustment
SECTION 20 - ENGINE REPAIR aroup IXI -
Speciflcaaone and Special Toc4s coup as - case
-zoo. win eo cess Group 10 - Blcick, Liners,
Pistons, and Rods Group 15 - Cmnkehaft enI M0in
Bearings Group 20 - Lubrcatén System Group 25 -
Cooling System SECTION 30 - FUEL AND AIR
REPAIR Group 0D Specitca'tons arid Special
Tools Group 05 Air intake System Grpup 10 -
Diecel Fuat System Group 15 - Control
Linkage SECTION 40 - ELECTRICAL REPAIR Group OO -
5pecI\tcations and Speéal Tools Group O5 -
Harness Replacement Group 10 - Charging CiroUit
R0pair QrOMp 15 - starts Cir uit Repair s oup 2D
- Lphts, Instruments, and A essories SECTIOf'J
SO - POWER TRAIN REPAIR Group OD - SpecificatiDus
and Special Tools Group 05 - Clutch Group 1D -
Transmission gdp j . g tjgj GroUp 20 - Final
Drh/e Group 85 - Sundstrazxl Hydrostatic Drive
Group 26 - Eeton Hydrostatic Drlve Oroup 30 -
4-Wheel Orive Planetary Gearing) Oroup 31 -
4-Wheel Orive Cem Love) Droup 35 - Posi-Torq
Ground Drive Group 40 - Tires and Wheels SECTfOL/
60 - STEERING/BRAKfiS REPAIR croup oo -
speciiicstions and spedal Tools Group 05 - Power
Starring Group 1D - Brakea SECTlOhl 70 -
HYDRAULIGREPAIR Group 00 Spaclficatlons Group
O5 ReSeryolr Group 10 Hydraulic Pump Group 15
Hydraulic Valve8 Group 20 Hydraulic Gylindera
Group ZS Hydrautc Motors Group 30 - Accumulator
Combées) ( -610300d
Orcup zs - Feeder House Paddles, Stripper and
Front Cksure SheetS (SideHill 662D
Combines -403300)
Qroup 3d - Feoder GonYeyor Chain, Llppef ShAh,
PadcIIe arid Shah, Conveyor Drurri and Front
Gksure Sheets (Sidellill 6620
C b s 403301- )
SECTION 120 SEPARATOR REPAIR
Group 00 - Specifications and Special Tools Qroup
05 Cylinder, Concave, ana Beater Group \ 0 -
POSI-TORQ Cyânder Drive Group 12 - DuakRange
Cyl r Drive
Group 15 Straw Walkers art Grankshafts Droup 20 -
Straw Chopper and Straw Spreaded GrCKjp 25 - Shen
Auges, Fan. and Shoe Frame Groug 30 - Tailings
Elevator and Augers Gr0up 35 - Lower Auger. Clean
Qrain Elevator,gnd Grain Tank Loads Auger SECTION
13D - GRAIN TANK UNLOADING SYSTEM
Qry Group QrcUp Group
ficqtjgr Grain Tank Cro9s Augers Vertical Auger
and Bcvel Gears - Horizcmtal Auger arty Gearca8e
TM-1202(lan-BB) Lltho In U.S.A.
0is
6fi20.
MI6AD. 2GOand88TO
3
CONTEMTS SECTION 270 - HYDRALiLiC OPERATION AND
TESTS Group OO - Specifications and Special Tools
Group O1 - hydraulic System Operation Grtxjp 05 -
hydraulic System Tests Qroup 10 - Reservoir Group
1fi - Hydraulic Pumps Group 20 - Hydraulic Valves
Group 25 - Hydraulic Cylinders Group 30
Hydraulic Motors Oroup 35 Accumulator SECTION
200 - OPERATOR STATION OPERATION AND TESTS
SECTION 140 Group 00 Group 05 Group 10 Group 15
I7IMOR ORIVES REPAIR SpecificatipnS Engine
Powershaft Primary Countershafl Secondary
Countershaft
SECTION 150 - SIOEHILL LEVELING SYSTEM
REPAIR Group 00 - Specifications and Special
Tools Group 05 - Electrical Components Group 10 -
Hydraulic Components
SEGTION 160
ALITOMATIC HEAOER HEIGHT CONTROL REPAIR
Group 00 Specifications and Special Tools Group
05 - Repair of Gomponents
Group D0 Group 05 Group 10
Specifications and Special Tools Air Conditioning
System Heating System
ENGINE OPERATION AND TESTS
SECTION 220
SECTîON 350 - SIDEHILL LEVELING SYSTEM OPERATION
AND TESTS Group OO - Speclfîcatiori8 and Speôal
Tools Group 05 - General Information, Diagnosa,
and Tests
Group 00 - Specifications and Special Tools GrOUp
05 - SySt9rn Opgratior Group 10 - System Tests
and Diagnosis SECTION 230 - FUEL/AIR OPERATION
AND TESTS
10 15 SECTION 360
Electrica1 System Hydraulic System AUTOMATIC
HEAOER HEIGHT CONTROL OPERATION ANg TESTS
Specifications and Special Tools Air Intake
System Oesel Fuel System Control Linkage
Group 00 Group OS Group 10 Group 15
SECTION 240 - ELECTRICAL OPERATION AND Group 00 Specifcations and Special Tools
TESTS Group 05 General lnformation, DiagnosiS, and
Group 00 Specifications and Special Tools Teste
Group D5 Genera1 Information and Diagnosis Group 10 Mechanlcal System
Group 06 Electrical System Diagnosis Group 15 Electrical System
Group 10 Charging Circuit Group 20 - HydraUlic Sistem
Grpup 15 Starting Circuit Group 25 - General Information, Diagrosis, and
Group 20 Lights, Instruments and AcCos9ory Tests - DIAL-A-MATIC
Circuits Group 30 Mechaoical System - DIAL-A-MATIC
Group 35 Group 40
Electrical System - DIAL-A-MATfC Hydraulic
System- DIAL-A-MATIC
BECTIOñl 250
POWER TRAIN OPERATION AND TESTS Specifications
dna S/e at Tools Clutch Diagnosis TransmissionDia
gnoñs Final Drive Diagnosis Hyclrostatic Drive
Test8 and Diagnosis 4-Wheel Drive Diagnosis
(Planetary Gearing) 4-Wheel Drive (Cam Lobe)
Ainfonnation,IIusrrarionsandspeciteisltoran
eo in tfiis technical manual aro oased on tfie
latest infor a- lion available at the time of
pUbtication. The fight is resumed to make
changes af any lime wi'fhouf nptice. 7he
spec/f/cat/ ns given ih t/s rechcita/ mwua/ are
intended for semice only. The/ do oof include
rmrtnal factory manufactunng tolerances. Copyzlgt
rt 1988 Deare Company
Group 90 Group 05 GroUp 10 Group 15 Group
20 Group 25
Croup 2b
Croup 30 - Posi-Tarq Ground Drive Diagnosis
SECTION 260 - STEERING,BRAKES OPERATION AND TESTS
Previous Edftîons ? 198Z. 1986, 19B5, 1904, 1983,
1B82, 1981, 19B 1979, and 1978 beara opafiy
C
Group 05 Group 10
Power Steering Brakes
Ti iz0z(Jan 88) Lliho I U.S.A.
4
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TECHNICAL MANUAL TABD
IMTRODUCTION To fully utilize thia technical
manual you muet under- stand how it is
Drgarjized. Only two tab colors are usedgreen
and yellow. Each oolor represents a different
type of information. Spend a mirMe readinjg this
now and save many minutes of searching later.
GREEN TAB SECTIONS The green tab sections are
repair sections that tell how to r6pAir the
oompoflents ol true viioUs sys1eIYiS. Repair of
a component includes Removal from machine fwhen
necessary) Disassembly Inspection Replacemenl of
parts Assembly Adjustment Installation on machine
when necessarv\ Tne numbers u8eo far tho epair
tgreen tab) sections are part of an overall
service publkatian numbering system. The numbers
identify the same sections in tho pans catalog,
flsi rate manuai, ssrvce informaiion
YELLOW TAB SECTIONS Each yeliow lab section
contains information on Syslem Tests System
operatiot explalns how the system and its
components cork. SV6tem tasts tell how to tesl
the wstemand diagnose the problem.
Tñ4- ID2 fiep86) Lltfio in LI.t.A.
Com0lnee - 8B20, Si0eH-ilt 6620, 7720 Bfi0 8820
6
TAB POMTION?S Each graen tab ant it
uorresponong yellow teb hava the sems tsb
oositbn. This Nto hep you sickly Ioltste TLe
related Informatbn.
Yellow
Zgd
zoo mime omtaoon
HOw To usE Use the followlng three-afsp prooeduta
to 'O
Operation
Repalr?
Tealst

1, Determine th tyFo of informatlori you need.
Is it repeir, operation, or testst
Yallow for Operation rz Techs
ttt TYPE DP INFORMATiON1 3. U9e the table of
canlants on tha fkat pege seutlori to locate the
Irrormatlon.
7
TECHNICAL MANUAL TABS
lhlTRODUCTtON To fully utilize this technical
mammal , you must under- stand how it is
organized. Only two tab colors are usedgreen and
yellow. Each color represents a different type of
information. Spend a minute reading this now and
save many minutes of 3earching later,
GREEN TAB SECTIONS The green tab sections are
repair sections that tell how la ropair the
components Of Ihe variou. s Astern Repair of a
component inclu des Removal mom machine (whun
necessary) Disassumbty Inspection Rcpluccmur t of
party Assembly Adjustment Ir\slaIIation on
machine Twttun necessary) The numbers uaed for
the repair Tureen tab) sections are part ol an
overall service publication numbering system. The
numbers identify the same sections in the parl
cataJuq, flal rate manual, service infuimatiun
bulge Um, and service tainintj courses. YELLOW
TAB SECTIONS Each yellow tob section contains
information on- System Operation Sysicm
Tests Svs/cm operetion explains how lhe system
and its componenl5 work. System tests tell how to
test the system and diagnose the problem.
Combines - 6620, Side Hill 66fi , 770
and 8820
8
6 TAB POSITIONS Each free n tab and its
COrrespOndinQ yeIIOw tab have the ram e 1ab
position. This is to help you QUickly locate the
related inlormation GOLOR POSITION SEG. NO.
DESCRIPTION TO Enemy Repair 220 En0lne
OPeratlon end Tesle
HOW TO USE

• Uso the foJowing three-step procedure to locate
  the
• desired inform 6tiori.
• Determine the type of informaiion you noed. Is
  it repair. operation, or tests?
• Go to the appropriate section tab Green for
  Repair
• Vellow for operation gr Tests

Repair?
Tests?

TYPE OF INFORMATION?
3. Use the iable of contents on the tirst page of
the 5eClio g to foCate lhe \nformgtisn
Combnes
SideNi// 66 '0. 77fi'0 and BBE0
Thai- I2D2 (Qec8 I) Citho in U.S.A.
6620.
9
GENERAL
General gp6iGcetforia 1P-00-1
Section 10
CONTENTS OF THIB BEGTION GROUP 00 GENERAL
SPECIFICATIONS Serial Numbers
GROUP 05 - DIAGNOSING AND TESTING PFtOCEDL3ES
...... 05-1 GROUP 10 TUkIE-LP ANO
ADJUSTMENT Preliminary Engine Testing .... .. .
.. . . . . .. 1D-1 Engino TunaUp .. . . .. ......
.. .. .. .. .. .. 10-1 Adjustments . . . . . . .
.. ...... .. .. .. .. . . .. 100 Torque Chart .
. . . . . .. ...... ............100 Cara and
hlaintenanco of Balte and Chaine . . 10-4
Group 00 GENERAL SPECIFICATIONS 9ERIAL NUMBERS
BaMl Number Unn
Sgpafator. . .( -1B82) Rear Bh harXl up_at_ht
(1980- ) Naar right hand side of uoI
CuttKg Plateau and Piciup Platfow ..
.. Left-hand side of main fiarrte Lower
right-hand aide on bulk-head frame
Engina ........ Front aide of englne block m
water jacket directly aIgtzre Starter Sundatrand
Hydrostatic lJNt Under pump section Eaton
Hydrostatic Llnlt .. .. . . . Sido of motor
section
Row-CrOp He6d ..... . ..... . Left-hand side
end sheet of main fmrne
Cam Lobe 4-Wheel Drive Motor , . , . , , Top of
mots None
FZ-f202 Sep-86) Lfiha in LIS.A.
10
1ê-00-4 Gearal Speciùcetions
Oeræra/
GROUND 8PEEDIN MPl4 (km/h) 8830 COMeINE (PoÁ-Torq
Dfivø) 10 TO 82 AND 11 TO BE RATIO FINAL PRIVE6
(l.1 to 2.7j (Z.6 to 6.3) (4.7 Lo 1 J .6 I ß 6 Lo 26 6j (2.J lo 5.2
23.I-26 Prolila
(.1 to z.rj t2.4 to 6.1) (t.5 to . ) tß.3 to 2s.7 (2.1 lo 5.0t
8, I ft .7 to l .ß 1.7 io 4.2 3.0 to 7-6 7.g Is 17.d l-4 io 3-lt
(1.1 to Z.9j (2 7 la 6.8) (4.a to 12.2) tf1 3 la zd.0\ t2 3 o 5.5j
.7 Ö \ .8 1.6 to 4.0 2.9 Ø 7.3 6.7 to 16.9 14 to 3.3
\O t.1 a 2.9 .7Io J.8 2.8 la 6. 1.7 to 4.2 .4.to 11.0i 3.0 la 7.6 (0.8 la w.2l 7.0 to 17.4 t2. io s.a 1.4to 3.d
(l.1 2.9 z. Is. t4.8 ro 12.2j I \.S1o 28.Q (2.1 to 5.5j
10 TO 65 AND 11 TO 104 RATIO FINAL DRIVES Tire or
Tracks
Act beer .7 tri 1,a (1.1 to 2.7) .T to 1,7 (l.1
æ Z.7j . tø .8 (-5 tO 1.4)
JO
6 io 3.9 (z.4 ø 6.3j 1.6 to é.0 (2.6 æ 6.ay .7
la 1.8 (1.1 to 2.9)
2 e to 7 ( a to 1 .4\ Z.9 to 7.3 (4.7 æ I .By
I .4 Ø 3.3 (2.I k 5.3
6 S to 6.3 (1 . to 2g.2j 6,d to J6.8 f10.6 Io
26.2 7.0 io 7.ô (4.8 to 12.2)
1 2 io 3.2 g.1 o 5 1.3 lo 0.3 (2.1 to 5.9j .6 to
1.5 (1.0 to 2.4
10
Fracce
11
General
Drive)
GROUND SPEED IN MPH (km/h) 6620 CONBldE
(Hydrostat 10 TO 82 ANO 11 TO g0 RATD FINAL ORIVEg
Tbe tel Gear Znd Oear 4th Oear
Z3.126 R1 Cleet RS Low Profilu 8.0 8 0 io 1.7 to to z.z 0 to 1.6 0 io 38 Ió lo e.2) 0 to 3.7 0 to 6.9 l0 to z 3j 0 io 6.7 0 to 16.0 lO io 26aI 0 to 1'5.4
Z3.128 28.1-g g, 10 10 0 io 2.6) l to 1.? (0 to 2.8) g to 1.7 (0 to 6.6 tO 4.0 0 to 6.6 o \o 3.9 \0 to l0.9) o to 7.3 io to t.e 0 lo 7.1 (0 \o 25 l 0 lo 16.8 (o io ze.al 0 \o t6.3
28.126 h2 Carl 8 Rica t0 0 m 17 /O to .a 0 \0 4.0 (0 to J l.6) 0 lo7.6 (0 io z6 tl 0 lo 16.6
(0 io 2.8 0 to 6.6) (0 to t1.9 (0 lo 27.4l
1o TO 95 AND 11 TO 104 RATIO FIhIAL DRIVES
Sirs
24 5.32 R1 Cleat tO O ie z.7 0 ie a-9 0 lo 7.1 g lo 16.5
(0 lo 2.7) (0 lo 6.3) 0 to 11.4) 0 Io26.Z
2A.5-32 Tracks 10 0 \o t.7 (Q lo 2.7) 0 lo 8 (0 lo 1'.3 Oto 4.0 (0 lo 6.4) 0 lo1.g (0 zo 2.g 0 to 7.9 (0 to 11.8 0 Io 3.9 0 to J6.8 (g 6 27.0) o to 7.6
QROUNO SPEED CONTROL RANGE IN MPH (km/h) SlDEHlLL
8820 COMBINE
3ize Rusn8
FII Oeal 1O 0 lo 1.7 0 to 4.0 0 lo 7.3 0 ten l6-7
0 io 5.g I0 ! 8 I lO to I l.8) t0 \o 26.9)
Z3.1-26 R2 Cdne Rica JO 0 to 1.8 0 to 4.2 0 lo 7 6 0 to 17 ó
(0 Io I.9I 0 io 6.8l Oto 2.2 0 K203
co ines
s620, sian e a6zo, z7z0 and 88z0
TM- izo2 (I
3 L' fio in U.s.A.
12
General
10-OO-6
Gener Specifications
GROUND SPEED CONTROL RANGE IN MPH(km/h) WITH
4-WHEEL DRIVE ENGAGED SIDEHILL 6620, fîfî20 AND
7720 COMBINES HYDROSTATIC DRIVE)
Tire or Tracks 9Ize Type Ply 1et Gear 3rd Gear
23. 1-26 23i-26 RJ Cle t H2ûa 8 Rae 1 0 0 to 4 .û (0 to 2.4 fi 10 1 b 0 tO 8 1 (0to50) 0m0.2 0 to 4.8 lv to 7.71 0 n la 0 io 7 9 i0 to I 2.7) 01oA.3
24.5-32 10 0 !o 1 5 0to5l 0 M 3 1 i0 to 8.2 0 to 4 9 I0 to a. 0 lo 8 1
R2 parse 6 R ice 10 O 1O 2.4) g îo 1. 5 ,0 IO 3.0) g io 3 2 0 iO z.9 0 Io fi.0 P IO .O) 0 ïo g.4
28.I -Z6 R1 Cleal l0r2 q !o 2 4) 0 lo Ï.5 0 lo 5 1j 0 lo 3. 2 IO io 8 0) 0 to 5.0 j0 io 13 r 0 ta 8 4
RI Cleal 10 (ü to 2.4) 0 'n 1.ß (0 !o 2 6) 0 to 1.5 (Ö M 5 1l ß to 3.2 o to s. 1 0 la 3.1 l0toÉL0) 0 to 5. J (0 to 8.8 0 to .Ö 0 o 114) ) l0 g.' (0 to 13 6j 0 la B.4
30 5-3f R2 Cane arid Rce 10 (0 'o 2 4) 0 to 1.5 fg Ø 5 0 0 to 3./ (0 to g.0! 0 la 5.0 I0 \a 13, 5) 0 to 8.4
Ú O 2. 4 0 to .7 (0 IO 1.1 lÖ to 5.1 0 to 1.5 10 la 2.4j IO io 8 0! 0 to 2.5 (0 la 4.ß (0 tq 1 . 5) 0 to 4.4 j0 to 7.1
Comöines
6620, 5lt/eHiIl 6630, 7720 and 8B20
TI I-1202 (Carl-BE) Lilfio in U.S.A.
13
General
General 8peciffcationa 10-06-7
cRouuo sPEED ii use m/nt w3o couaiue \wa-oq
erve) 10 TO 82 AHD 11 TO 90 RATIO FINAL DRIYES
Bite g3. s-26
Typo CIaa1
2M iaar i .6 to 3.9 f2.6 to 6.g) i to 3.8 (2.d
to 6.1) I .7 to 4.2 (Z.7 t0 6. ) 1,6 to 4 0 (2.6
to 6.4l 1.? to 4.g (8.7 to 6.8)
3rd /Zear 2.9 to 7 2 (4 7 to 11.7) 2.8 to 6.9 (4
5 to 11.1 3.O to 7.6 (4.9 to Z.2) 8 9 to
7.3 (4.7 tg 11.gt 3.0 to 76 (4 6 to 12.2)
4tb Oear 6.6 to 16.5 \ 0.7 Ia 26.7 8.4 to J6.O
(J0 3 to 25.T 7.0 to 17.4 ( 1.3 i0 26.1I 6.7 to
16.9 (10.g lg 27.2 7.0 to IN.4 ( t.3 to 28.O)

• Reverse Dec
• to 3.2
• (g.1 to S.2)
• J to 3.z (2 0 to 5.Ol
• to 5.4
• (2.3 to s4)
• to .3
• (2.1 tg 5.8)
• to 3.4
• (2.3 to 5.5)

10
.7 lo 1.7 (z .1 ta 2.7) .7 tO 1.7 (J .1 te
Z.7) .7 D1.8 (1 1 to2.9) .7to 1.B
B
23. t -26
Dana Raw
1g
2B.l 28
CI u
12
12
7 Io 1,g IN .\ to 2.g1
10 TO 95 AND 11 TO 104 RATIO FIMAL DRIVES Tim or
Trade
Bize Type 2ud Gear 9rd Gaar 4M Deer Ravaras Gear
24.5-32 Cleal 10 .7 IO 1.7 2.8 to 7.I 6.5 to J6.3 1.3 to 3.2
(J.1 la 2.7) (4J to 1.d) (J 0.5 to 28.2) (g.1 to S.g)
Cane g Rice JO 7 to 1 7 1.6 fo 4 0 2.9 to 7.3 6.7 to 6.8 1.3 \o 3.3
( . \o 2 7) (Z.6 tO 6.4) (4 7 io 1.6 (t On to 27.O) \z. to 5.3
30.532 Claal 10 .7 the 1.T J.6 to 3.9 2.6 to y.2 6 a a J 8.4 1.5 la 3.2
30.538 Car 6 Rie 10 7 to 1 8 1 8 la 4.1 (4Tb116) 4.O to 7.4 (10, b 8dI 6,6 ro \ 7 I C1 o32 J 3 lo 3.3
(I.J fg 2.g) (4.9 tg 11.9 (1 .0 tg 27.g (1.8 to 5.3)
.3 la 8 .7 Io 1 g T.3 to 3.3 3.0 to 7.8 .6 Io z 5
II.J to Z.9) (2.1 to 5.3) (46 to 12.Z1 (J.0 to 2.4
coi0ine - 86s0, Sidmil! Ms0, ??s0 xia 8820
14
General
Id-0d-8
General Specifications
GROUND BPEED IN MPH (km/h) 7710 COMBINE
(Hydrostatic DrIe) 10 TO s1 ARD 11 TO 90 RATIO
FINAL PRIVES
23a-2d R1ChaI i0 0 to 7 o to 3.8 0 io 6 9 O io z6O
i to 2.7j O to 6.2) (O la 1 I.4) (O to 26.2)
23.1-2R O to J R O io ñ.7 0 ia R7 O a zñ 4
f0 to 2.6) O 1o 6.0) I0 to z0 9) folo 25 J)
10 g to 4.g 0 ie ?.3 O io i6.8
0 \o 6.6 IO Jz 1 9 0 1o 28 0)
28 -L6 12 O la f.7 O to 3.9 0 la 7.J O IO 16.3
(0 1C 2-8) (010 6 31 (I IO 11.6l (0 o zc 7
HP Jane R ire 12 0Mt.7 0 IO é. b 0 to 7.3 Oto J6.8
l0lo 2B) !0io6i TO la 11.9I tO la 27.4I
10 TO 95 AND 11 TO 104 RATIO FINAL DRIVES
Tire 2rxs Gear 3rd Gear Tire 2rxs Gear 3rd Gear Tire 2rxs Gear 3rd Gear Tire 2rxs Gear 3rd Gear Tire 2rxs Gear 3rd Gear Tire 2rxs Gear 3rd Gear ém Gaar
Type
2 5-32 i0 0 1o s O 1D 0 8
24.3-32 R2 Care fiice 1 O 00 to 2.6) g io 1 7 O to 6.By g 1c 3 8 q to 7. I g tc 1.2
Rl Get 10 IO la 2.7) o la 1.7 \0 1O 6 3j 0 io 3.8 0 Io 11.8j 0 to 6.9 j0 to 27 0j 0 !o 15.9
305t2 Hf Gme flice 10 (0 IO 2.) 0 to 1.7 t0 1O b 3) g to 3.8 (0 io 11.6j 0 zo 7.2 P o 4) B to 16.5
O la 2.7j g Jo .B (0!oL3 !0lo 63! 0 of7 4o2B !0 to 116I 0 io 1.2 t0 to 5.2 0 Io 26 5 0 to 7.3 (P to 11.8j
comnes - 66d. u0er/ 66n. /rH and 88d
Tfvl I2J2 (Jan83) Lilfio in U.S.A.
15
General Specifications
10-00-6
General
GROUND SPEED CONTROL RANGE IN MPH (hm/h) 7720
RICE AND gg2g COMBINES
Tire 24 5.32 size ana Type R1 Cteat Pty 10 0 1o 1 6 0 to 3.6 3rd Greg r 0 to 6.5 4th Gegr 0 1O 15 0
0 to 2.6) 0 to 5 6/ D fq 10.5) 0 to 24 1
R2 hare and Rica 10 0 to 1 8 (0 1o 2 6) 0 ta 3.T (0 Io 6.Q 0ioâ7 l0to 10 8) 01o 54 (0lo 248)
24.5-32 R 3 Low Prolia 1g 0 to 1.3 t0 a 2 Dto3.4 (0to55 O o 6.3 (0 to 1 0 1 ) O o 14.9 (O a 23 2)
l84c8 Dcâs arxs 30.M2 II 1 Cleat 8, 10 0 to 1.6 DiD36 O to 6.ñ O to 15.1
(0 to 2.Q (0to58, t0 IO 1 O ) (O to 2s.z'
1_at_4-3g OU I6
and 00.5-3Z R2 Cane end Rae 8, 10 0 to 1.6 0 la 8.7 (O to 6.0j O to 6.8 (0 to 1 0 9 O to 15.6 (0 la 2 .11
30.5-32 10 0 7o 1.'i (0 IO Z d1 O Io 6.3 (0 Io 1 0.1 ) O to 14.4 (0 to Z3.21
7fl x44.00-32 R 1.5 Hqh Flolation 42 0 to 1.6 0 to 3.7 IN t 6.0) O la 6.8 (g (g 10. 0 to 13.3 (0 l0 ZS.0)
Trackr 0M1 (oto,z) 0 to 2 4 O to 3.9) 0 to d.4 (0 to 7.1 g to 10.1 g to 16.3
GROUND SPEED COHTROL RANGE IH MPH (km/h) WITH
4-WHEEL DRIVE ENGAGED 7720 RICE AND 8820
COMBINES pis And Gear
Tiyg
jge and Tyge
2GJ2 g 1 Cleat l0 0 o 1 4 t0 to 2.3 0 tot.D (0o47 0 1O é.6 (0 to 7 4) 0 io 7.8 0 1o 12.6)
24.5-32 R2 Cane and Vice i0 0 I S t0 to 2 ) 0tO h.d (0 CO 4.R) g 1 4 g (0 0 7 7 0 la 7.9 (0 10 12' 7)
l6MBDuel and 80.5.32 R! Gear OIO l d 0 tO g Q O 1o 4.7 g To 7.g
t0 to 2.2) (0 IO 6.7) O o7.6) 01o 271
143BDueN amd fl0S_at_2 R2 Cane aod Ace g, 10 0g15 0 to 1.0 gl 1C 4._at_ d Io B.O
(0 lo 2.4) (0 IO 9.B) 10 7 7) (0 1O 12 9)
73 x44 O0-32 Q 1 -igh Flota'on 12 0 to 8.0 0 'a é.7 0 la 7.7
O to 4.8) (0 1O 7.6) (0 i0 1 2.4)
Track s O to 1._at_ (0 to 1,6 0 2.0 0 o 3.2 (0 1a ñ.1) Otof.5 (0to B9)
TM1fii0y(Jan-BB) Lltha in LI.S.A.
CornDnes - 6620, SideHiIt 6620. 7720 and 8820
16
General
DIMENSIONS
Oirrmns
s are with combine equipped with stanOor'd
equipment tires and memo antenna clipped to
roof ""
662a 8 deHili 662D 772D 8826
Standard Equipment Tires . . . .... . . . . .. Standard Equipment Tires . . . .... . . . . .. . 23.1-26-in. 23.1-26-in. 24.5-32-in. 30.5-32-in.
Cleat R-1) Cleat (R-1) Cleat (R-1) Cleat (R -1)
A. Height tGrain Tank flip-Up In Up Position) A. Height tGrain Tank flip-Up In Up Position) . 13 ft. 13 ft. 3 in. 13 ft. 4 in. 13 ft. 4 in.
(3.96 m) (4.04 m) (3.96 m) (4.06 m)
B. Height tGrain Tank flip-Up In Down Position And B. Height tGrain Tank flip-Up In Down Position And B. Height tGrain Tank flip-Up In Down Position And B. Height tGrain Tank flip-Up In Down Position And B. Height tGrain Tank flip-Up In Down Position And B. Height tGrain Tank flip-Up In Down Position And
Exhauzt Pipe At Highest Point) . ...... Exhauzt Pipe At Highest Point) . ...... . 12 ft. 8 in. 12 ft. 11 in. 13 fi. 13 ft.
(3.86 m) (3.94 m) (3.86 m) (3.96 m)
Width . Width . 12 ft. 4 in. 13 ft. 13 fi. 3 in. 14 ft. 5 in.
(3.76 m) (3.96 m) (4.04 m) (4,39 m)
D. Wheel Tread - for tread widths refer to wheel spacers page in the operator's manual. D. Wheel Tread - for tread widths refer to wheel spacers page in the operator's manual. D. Wheel Tread - for tread widths refer to wheel spacers page in the operator's manual. D. Wheel Tread - for tread widths refer to wheel spacers page in the operator's manual. D. Wheel Tread - for tread widths refer to wheel spacers page in the operator's manual. D. Wheel Tread - for tread widths refer to wheel spacers page in the operator's manual.
E. Unloading Auger Discharge Height . ...... . 12 ft. 2 in. 12 ft. 5 in. 12 ft. 2 in. 1 2 ft. 6 In,
(3.71 m) (3.76 m) (3.71 m) (3.61 m)
F, Unloading Auger Clearance Height 11 ft. 8 in. 11 ft. f 1 in. T1 ft. g in. \ 2 ft.
(5.56 m) (5.63 m) 3.56 m) (3.66 m)
G. Unloading Auger Reach 5 ft. 7 in. 5 ft. 7 in. 4 ft. 1 in. 4 ft. 6 in.
(1.70 m) (1.70 m) (1.24 m) (1.37 m)
Header Size Used 20 It. 20 ft. 24 ft. 24 ft.
t6.1 m) (6.1 m) (7.32 m) (7.32 m)
H, WheelDase (All but hgavy-duty) 12 ft, 1 in 12 ft. 10 in. 12 ft. 1 in N, A
Heavy-Duty Rear Ax1e 3.68 m) 12 ft. 8 in. (3.91 m) 12 ft. 8 in. (3.68 m) 12 ft. 6 in 12 ft. 8 in.
\3.B6 m) (3.86 m) f3.86 m) (3.86 m)
Turning Radius N.A N/A 20 ft. 8 in. 26 ft. 4 in.
(6.33 m) (8.03 m)
Clearance Radius . .... .... .... . N/A N,''A 28 ft. 9 in. 30 ft.
(8.89 m) (9.14 m)
Add 3-il. (0. 9 m) low extra long unloading Buger Add 3-il. (0. 9 m) low extra long unloading Buger Add 3-il. (0. 9 m) low extra long unloading Buger Add 3-il. (0. 9 m) low extra long unloading Buger Add 3-il. (0. 9 m) low extra long unloading Buger Add 3-il. (0. 9 m) low extra long unloading Buger
Measured to cenle at oufer wheel
trBck, ""Measured to extreme scribed circle
(end ol unloading auger in transport posiIi'on).
Tfi41202(J8n-08) Lltho in U.SP.
Combinas
6620, S'6eHi// 6620, 7720 an0 B820
17
General
General Specifications TO-00-11
DIMENSIONS GideHlll
7720
8810
8g2i
1. Length A'ith Auger In the Rear Position'
26 ft i in, (7.95 m
Separator Only .
..... ... . 26 fl. 1 in. (7.95 m)
2d It. 1 in (7,gfi m)
26 ft. 1 ir .7.93 m)
Separ afar WI h Corn Heat
,3f, 3irv (JO44 m)
34 fl, 3 in. ( 0.44 m)
34 f1. 3 in. (10.44 m j
34 ri. 3 in. t10.44 m)
Separator With Row -Crop I lead
3s rt, 8 iu. ! IO.87 m)
35 ft. 8 in. (10 87 m)
35 ft 8 in, 1 0.87 m)
Jr ft. 8 in, (10,87 m)
Separator With Fla xihfe Plsilorm
36 ft. 4 in (11.07 m)
36 ft. 4 in. (11.D7 m
36 II. 4 in. (11.07 m)
36 ft. 4 in. (11.07 m )
Separator With Rigid Platform
. 33 ft. 8 in. (10.26 m)
33 ft. 8 in. (1 0.26 m)
33 f t. 8 in. ( I 0.26 m)
33 ft. 8 in. (1 0.26 m)
Separator With Pickup PIarform (pirkup in) . .
. 33 ft. (1 0.06 m)
33 It. 10.06 m)
33 ft. f i 0.06 m)
33 fi. (10.06 rn)
1. Length With Auger In The Gut Pos
ition. Weparzlnr OnIy
2z ri. g in.
Separator With Corn Head
. 30 ft. 11 in. tg.42 m
SG ft. 1 T in. (g.42 m)
3D ft. 11 in. f9.42 m )
30 ft. I T in. (9.42 m)
Separator With-Row Crop
Head . .
... ... ........ . 32 fi. 4 in. 9.86 m)
2 ft. 4 in. (9.86 ) 3J !t. (10.06 m)
32 II. 4 in. (9.B6 rn)
32 II. 4 in. t9 .86 m)
Separator \V'ith Flexible Platform
. 33 ft, (10.06 m)
34 fl, (10 06 m
33 fi. \10.06 m)
Separator With Rigid Palfo m .
. 30 f1. 4 in. 9.25 m)
30 fi 4 in. (9.25 m)
30 ft. 4 in. (9.23 m)
30 f. 4 in. 9.25 m)
Separator With Pickup Platform (piCkup in)
29 fi. 8 \n. (9.01 m) 2 It. (.61 m)
. 29 ft. 8 n. (9.0fl m) 1 ft, 9 in, ( 53 m)
29 ft 8 in. (9.04 m) i it, 9 in. (.53 m)
29 ft. 8 ir. /9.04 m' 2 II, 1 in. ( ,64 m
K. Ground Clearance
Till- i202 (Can-83) Lf/ho /n U.S.A.
18
General
Dlegnosing and Testing Procedures 1005-O1
Group 05 DIAGNOSING AND TESTING PROCEDURES
4. Inspect Tha Combine Got off fhe combine and
make a visual check. Use your eyes, ears, 8nd
nose to spot any signs o/ trouDle.
To prevent unnecessary loss of time and money,
use lhe following seven sleps for a quick and
aocurale method of Ioca\irg lroubles 1, Knew The
Unit
Look clasely ay the components. lnspect for
cracked welds, loose hardware, damaged ilnkages,
wom or broken lines, elc.
In olher words, "Do your Homework" Sludy the
Operator's k\anuaI ard this manual to knew how the
Indivldual cimponents work and what their
function is in the overall system.
During the inspection, make rotes of all the
trouble signs. 5. List The Posaible Cauaea With
the information obtained during steps 1 through
4, make a list of the possible causes.
Keep up with the latest service information. Rad
and lhen file in a handy place. Record Ihe
Service Information Bulletin numbers qn the pages
provided in the front of this manual. Information
received today may have jhe cause and remedy of a
proDem being encountered. 2. Consult The
Operator Ask the operator how the oombine was
performing when it started to fail. Find out what
was unusual about
What were the signs you found while inspectir
the combine? What is the most likely cause? 6.
Reach Some Conclusions Look OVBr the I1St of
possible causes and decide which are mosi likely
and which are easiest to verlfy.
Also flnd out if any "do-it-yourself" service was
performed. (Vou may flnd the trouble somewhere
else, but you Ghould know if any CmreCtive
measures have alraady been taken.)
Review the "Diagnosing Malfunctions" section as a
helpful guide.
Reach your deci9ien on the probable causes and
plan io check them firsf. 7. Test Your
Conclusions Before repairing Components In the
systm, test your confusions la see which are
corred.
Aak how the combine is used and how often it i9
serviced. Many probl6lTl9 Flue ceused by poor
mainte- nance or abuse.
3. Operate The Combine IIIt e oombtre is
operable. opeiate it yourself. Don1 ralty
completely on the operator's story - check i\
your-
Some of the possible causes may be verified
wiItiou\ furlher testing. Check these
possibilitles first.
Testw4l narrow the remaininglist of possible
causes and soon Ihe actual cause(s) of l'oubIe
wit! be pin pointed.
Are gauges reading normat?If noi, maybe the com-
ponent being monitored is not functioning
correcHy or the gauge is faulty.
Wi\h the causes) accu alely located, It is now a
6IiYIple maker la ramove and repair the
component(s) at taut
How's the performance? Is the action perhaps too
fast or loo stow, erratic, or none at all?
oo the controls fel solid or "spongy? oo they
seem to bg Sicking" Do /Ou smell Or 6B0 any
signs of smoke1 Do you hear any unusual sounds
Where?
TM-120z /Ocf-78/ La
i L/.S,A.
Combines
p8 0, S/é'eM// a6 o. Fix
and 8820
19
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20
Tune-tfp 10-10-1 Group 10 TUNE-UP AND
ADJUSTŒENT GENERAL IIÆORMATION Belle tuninq up a
comblnø engkæ, deterrNne whether a tunæup wzl
restore operalg efflcWcy. vrhsø tlærø a æubt, the
folowkgpnstdr aryteaia wiM help deterrulne if
the eng e can be turied _at_, K the PREkIMINARY
ENDINE TESTTNO Compreasbn Test (mNrrcxn reeSrgs
at 200-250 rpm cræking speed)
0406DH-D1 6400TH-01, THAT , .. , . , . .... .,..
..
26-2B fp/cm (26-27 ba0 l3z0-400 psz ... . ... ,
. ..... ... ZS-25 Up/oTp (23-Z0 bas 330-370 pgi)
ENDINE ( 252882j
8488THO1, TII05 . .. ... ..... . , . , , , . .
, . ..
.... .. ,... ,,. . ,. , 27aKg/crrr 27-31 bar)
(3B0450 psi)
ENGINE (252083- ) 6488AH-01. AH-02 . .
2 25 (S S OI OP . .. .. .. ... .. - ... , ..
25-30 Kg/ 25-29 buy (355-415 psi)
ENGINE ( -227649)
8466AH-01, AIt-02, AH-03 .. . . .. .. .. .. .. ..
ENGINE (227a50- )
proxlmataly 4xe. There sreud be kss thB125 psi
(1.72 bar(1.75
It is very important thet all cy /xlar
praesurasba kg/cmm) dlfferenoe betwoan cylirder
pzassuras.
MÖIÏM NNE-UP
Air lntoke Syytem Çtœk B Btzxts fŒ Io89 Exhawt
System Chœk system fw iaaz. Chef for rectricled
mueller w ewaust ePe Crankoasa vent Chœk fr
æstñctks Cooling 8yetam Clean rotary saeeu,
radiator core, hyaoatW oil cools cxa, and 4r
condlt ltig condenser Clean ant fk/sh system
arxJ crea trarmoatata Chef raÖator cap
21
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