John Deere NO.8 Forage Harvester Operator’s Manual Instant Download (Publication No.OME29857)

1
Y
C
D
OPERATORS MANUAL
0 1 A U G 5 8
O M E 2 9 8 5 7
2
INTROD UCTION
There is a 2tIG?fT WAY and a WR ONG WAN to
do everything Your new J hn Deere No. 8 Forage
Harvester is a dependable machine, but only by
proper care and operation can you expect to
receive the service and long life designed and
built into it. Like any precision machine, your
Harvester will require a certain amount of
attention at regular intervals. When any
questions arise regarding lubrication, operation,
or maintenance, use your manual as a guide to
service your machine the RI GHT WAY. If you find
yourself in need of additional information or
special servicing not covered in this manual, see
your J hn Deere dealer. He is in a position to
ans\ver your questions for you, or to secure the
correct information. When in need of parts either
to replace worn parts or to make emergency
repairs, see your local J hn Deere dealer
. When ordering parts, provide your dealer with
the serial number of your harvester or
attachment, depending on the parts you need. This
informa- tion will help him to give you prompt
and efficient service. The Serial No. of your
machine is lo- cated on the lower R.H. portion of
the feed roll housing. (Record it in the space at
the left.) (Record the Serial No. of the
Attachments in the spaces provided below.) No.
8FH-P ... , ...... .... ........ No. 8FH-R No.
8FH-M .... .. , ......
3

• TABLE OF CONTENTS
• Page
• SPECIFICATIONS AND DATA
• 2 Identification Views
• 4 Specifications and Data
• OPERATION AND ADJUSTMENTS
• S Controls
• 8 Pre-Operating Instructions
• 10 Safety
• 11 Field Equipment
• 12 Length of Cut
• 14 Main Drive
• 16 Knife Adjustments
• 18 Cutterhead
• 19 Main Gear Case
• 20 Feed Rolls
• 21 Lift Controls
• 23 Wheels

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6
/oAn Doore No 8 fio rage Noruee her zcTA Ago
ver for A Mac Am eat F
THE COMPLETE OBSERVANCE of one simple rule would
prevent many thousand serious injuries each
year. THAT RULE IS NEVER ATTEMPT TO CLEAN,
OIL, OR ADJUST A MACHINE WHILE IT IS IN MOTION.
7
SPECIFICATIONS AND DATA Width of Basic Machine
Less Attachments . . . . . . .... ...... ...7 ft.
10 n. Width in Transport Position With Pickup . .
. . ........ . . 8 ft. 3 in. Height in Transport
Position (With Spout) . , .. . ......... .... .
10 ft. (Less Spout).......... .. . ... 5 ft. 9
in. Overall Length . . . . . .. ..............
............ ...., . .........13 ft.
Tires . .. .. .... .............. ............ .
, .. . L.H. R.H.
600 x 16-4-ply 600 x 16-6-ply
Tire Pressure . .. .. .. .. . . .. .. .. .. ..
.. .... .. ...... .... .. . L.H. 32 lbs. R.H.
40 lbs.
Number of Knives . Length of Knives . . . Type of
Cutter..
.. 2, 3, or 6 ... 19-21/32 in. . Flywheel
.......... ., ...... ,
Length of Cuts Regular... Special..... . ..
. Pickup Width (Inside) ... Mower Bar Width
(Inside) . Size of Tractor Recommended . .
. 7/16 in. through 3-3/4 in. . 5/16 in. through
3-9/ 16 in. . 52 in. . 60 in.
. . . . . ..... .............3-Plow Tractor
Types of Material Which Can Be Cut (Pickup) ....
..Common Leguminous Crops and Straw (Row Crop)
.. . Corn, Cane, Hegari, Sorgo, and Maize
(Mower Bar)
. Standing Leguminous Crops, Grain and Topped
Grain Stubble
Speed of Tractor Power Shaft ........ ..,
........... . 536 rpm ASAE Std.
Speed of Cutterhead (With Small Pulley)
.. ..... (With Large Pulley) ..... . Weight of
Machine (Approximate) with Pickup . Row Crop .
Mower Bar ..
. 648 rpm . 450 rpm . 3100 lbs. .. 3240 lbs. ..
3350 lbs.
5OTE Ri9lil - and left -hand sides referred to
in !his manual are determined
8
5
O P ER ATION AND A DJUSTMENTS 0 C 0N T R L S
The controls necessary for operation of yo J hn
Deere No. 8 Harvester are listed below. Before
operating your machine study the controls and
pre-operating instructions as shown on Pages 8
and 9. Do not try to make adjustments while
the harvester or tractor is runni rig. FEED
ROLL CLUTCH The clutch lever which controls the
direction of the feed rolls is easily reached
from the tractor seat. Should congestion occur,
the feed rolls can be quickly reversed by pushing
the lever away from the tractor. The congestion
is brolren up without leaving the tractor seat
and you are able to shift back into the forward
position and resume operation. JACK STAND The
jack stand, located under the tongue, is held
firmly out of the way by a spring loaded pin
during operation. To disengage the tractor and
harvester, pull the pin to allow the jack stand
to drop, and crank it down until it reaches the
ground. Another turn or two will remove the
harvester weight from the tractor drawbar,
allowing you to pull the hitch pin and free the
tractor. Your harvester remains supported at
drawbar height and is quickly hitched when you
wish to use the machine again. HAND LI FT
CONTROL The hand lift control is an easily
manipulated, hand cranked, screw mechanism that
allows the operator to raise or lower the pickup,
row crop or sickle bar attachment quickly for
operation or transportation. D R
FT
9
OPE RAT I ON AND ADJ USTM ENTS
HYDRAULIC RE- MOTE C YLI NDER Instead of the hand
lift control, the harvester can be equipped with
John Deere hydraulie remote cylinder or the
hydraulic system of any tractor having
sufficient capacity and utilizing a remote
eylinder that conforms with ASAE-SAE standards.
RAULI U REMOTE CYLI NOER
DISCHARGE SPOUT A drilled pin, inserted through
the re- tainer and spacer rings, holds the dis-
charge spout in location. Removal of this pin
allows the operator to rotate the spout easily
into a rear or side delivery position and to the
front for transport. The drilled pin is quickly
removed by taking out the cotter pin inserted
through it.
DRI LLED PI N
WAGON HITCH A wagon hitch, on the rear of the
har- vester, is provided for convenient attach-
ment when operating the machine with the
discharge spout in rear delivery.
CUTTERHEAD HOUSING DOOR LATCH The door latch, at
the top of the cutter- head housing, may be
pulled up and re- leased so the housing door can
be opened. This door provides access to the
cutter- head knives and stationary knife for
adjustment. CAUTION Never open the housing door
while the cut- terhead kn ives are in m oti on.
10
0 PERATI ON AND A DJ UST M ENTS
TONGUE LATCH The tongue can easily be moved to
the right or left to center the harvester on the
row or to transport the machine tehind the
tractor. By lifting the latch the tongue can be
located in any one of eight positions.
DISCHARGE SPOUT CAP CONTROL The flow of the
material from the dis- charge spout can be
directed with the discharge spout cap by a rope
from the tractor seat. By moving the rope to the
side, the pulley at the base of the spout will
lock the rope and cap into position. By pulling
forward the rope will release and the cap can be
adjusted. CAUTION Do not stand under discharge
spout when machine is running.
11
0 PERATI ON AN D ADJ UST M E NTS PRE-OPERATING
INSTRUCT1ONS HOOKUP INSTRUCTI ONS Attach your
harvester to the tractor by following the
instructions below. When attaching your harvester
to any of the older tractors, the tractor must
first be converted to comply with ASAE-SAE
standards. This can be done by purchasing the
proper conversion bundle from the dealer who
handles your make of tractor.
NI Ü M DIS2AND
EiR ILLEQ. PI N.
When attaching tongue to tractor drawbar,
keep the power take-off shaft as straight as
possible and have the front end of the harvester
tongue 1 2 to 15 inches from the ground. Check
the speed of the tractor power shaft to be sure
it is running ac- cording to the manufacturer's
recommendations. The tractor tire inflation
pressures specified in the Tractor Operator's
Manual will apply. NOTE The mitch plales mag be
turned over Jor tess qround clearanee or mounled
onder the tongue Jos more ground clearance.
12
0 PE RAT I ON AND ADJ USTMENTS KNIVES Check
the knives for proper clearance ae described on
Page 16. Sharpen the knives as required so
well-cut material will be produced and the power
requirements of the machine will be kept at a
minimum. Use wood blocks izt cuttezhead when
adjusting krtiyes. MOVABLE FEED ROLL Before
starting the machine be sure the movable feed
roll operates up and down freely on the rack.
Open the cutterhead housing door and check by
inserting a pry bar between the smooth roll and
movable feed roll. Be sure feed roll ehain guards
are in place when oper a ting . LENGTH OF
CUT Refer to the length of cut chart on Page 13
to be sure you have the correct knife, pulley and
sprocket set up for the length of cut
desired. SHI ELDS, NUTS, COTTER PINS. Never begi
n opera ti rig un til al I I he power shaft
shields are in pIace and secured. To insure
safety, and for best op- erating results, be sure
all safety shields are in pl ace, tig h ten all n
uts and check cotter pins to see they are
spread. MAIN GEAR CASE Before starting the
machine see that the oil level is even with the
check plug in the main gear ease, Page 34. C heck
this oil level and fi11 when nece9- sary. FEED
ROLL 5HI FTING LEVER Before starting the power
shaft, always put the feed roll shifting lever
into the neutral position. After the cutterhead
knives are in full motion, shift to the forward
position. BREAKING IN Operate a new machine at
half speed for 30 minutes, to loosen up the
bearings and to be sure they are not heating. For
a few minutes of this breaking-in period, reverse
the direction of the feed rolls. After the first
trial run, operate the tractor at full throttle
in low gear.
13
10
0 PE RAT I ON A ND ADJ USTM ENTS
SAFETY FIRST Remember the life you save may be
your own.

• KEP ALL SHIELDS IN PLACE.
• STOP sAcHlNE TO ADJUST AND OIL
• WHEN MECHANISM B ECO I ES CLOGGED, DISCONNECT
  POWEB BEFORE CLEANING.
• KEEP HANDS, FEET AND CLOTHING AWAY
• Fxoxt rOWEx-DxiYEN rAeTS.
• KEEr OFF IMF LEMENT U N LEF SEAT OR
• PLATFORMS IS PROYIDED. KEEP OTHERS OFF.

CAUTION Do not operate this machine withou t
proper shieldirig over the power shaft and
universal joints. Do not try to make adjustments
while machine is running. Always shut off the
engine before refueling. Be sure the feed roll
chain guards are in place when operating. Disenga
ge power shaft and tractor clutch and shut off
tractor before working on knives. Be sure never
to open cutterhead housing door while cutterhead
is run- ning. Do not stand under discharge spout
when machine is running. Use wood block in cutter
head when adjusting knives. Keep hands, feet, and
clothing away from moving parts. Do not smoke or
use an oil lantern when refueling any engine.
14
O PE RAT I O N A N D A DJ UST M E
NTS EQUIPMENT REQUIRED This equipment includes
the forage harvester and tractor to operate it,
wagons or trucks for hauling, and a blower or
elevator for moving the mate- rial into the barn,
silo, or stack. Chopping The John Deere No. 8
Forage Harvester makes it possible for you to
drive the tractor, pickup, chop and load the crop
into wagon or truck in one easy operation.
Adequate power to operate the harvester is
essential to insure the best results from your
harve9ter. The John Deere 620 Series Tractor or
its equivalent is recommended for operating the
harvester. Hauling Good wagons with suitable
beds are necessary for the efficient handling of
chopped crops. Trucks may be used by having the
discharge spout in side delivery and driving
along side of harvester. Wagons or truck beds, 14
or 16 feet long and 8 feet wide, meet capacity
requirements satisfactorily. For grass or corn
silage, a depth of 3 to 4 feet is good for
chopped hay or straw, a depth of 6 to 7 feet is
desirable. The most satisfactory method of
loading in the field is to attach the wagon to
the rear of the forage harvester. Storing The
John Deere 55 Forage Blower is an important piece
of equip ment for elevating silage into the silo,
or blowing chopped hay or straw into the barn or
stack. Its adaptability to height makes it
convenient for use with silage crops, and in
chopped hay it eliminates the job of re-
distributing hay in th.e mow. STARTING THE
HARVESTER Disengage the harvester feed rolls by
placing the feed roll clutch lever in the neutral
position. Start the tractor and engage the power
take-off on the tractor. Engage the tractor
clutch slowly to operate the cutterhead. After
cutterhead is operating at desired speed, engage
the harvester feed rolls by pulling the feed roll
clutch lever forward or toward the tractor. Open
the tractor throttle and engage the tractor
clutch. The flywheel action of the cutterhead
will keep the harvester operating while shifting
tractor gears. NOTE On tractors eqmpped vith
live power shaJt il is not necessarJj to
shiJI OPERATING SPEED After the break-in
period, the harvester should be operated with the
tractor at full throttle in low gear. DRIVE
BELT The drive belt will stretch during the
initial breaking-in period therefore, drive belt
should be kept tight for the first two hours of
operation, then adjust tension. (See Page 15.)
15
12
O PERATI ON AN D ADJ UST M ENTS L E N G 0T H F C
U T

• The chart, page 13, gives all the necessary
  information needed to change the length of cut on
  your harvester. To get any of the various lengths
  of cut it is necessary to make one or more of the
  following changes
• Add or remove knives and knife arms on
  cutterhead.
• Exchange sprockets on countershaft and feed roll
  drive shaft.
• Exchange belt pulleys on main drive and
  cutterhead shafts.
• Consult the chart to determine which length of
  cut you want from those given. At the top of each
  section of the chart you will see the proper lo-
  cation for the countershaft and feed roll drive
  shaft sprockets. The number of knives to be used
  is shown at the head of each column. Proper
  locations for the small and the large pulleys are
  shown at the left side of the chart.

N IFE AND
0R1VE
to Be Ch an ged
16
13
O PE RAT I ON AN D ADJ UST M ENTS
ADJUSTMENTS FOR LENGTH OF CUT
1 k eoref icaL SLOW FEED ROLL SPE ED (14S F ee t per Mi n u te) I 6-foot H S procltet oo Feed Roll Drive S6 at c with 1s-root h Sprocket on Fee d Roll Cou n Iees daft (Feed Roll Speed with J6-Toot H Special S procRet on Dri ve 5 hunt 136 lee per M in u te) FAST FEED ROLL SPEED (271 Feet per Minut e) 25-Toot H S proeket on F'eed Roll Drive Shaf c wit h 18-Troti Sprocket on Feed Roll Cou ntersHaf I (Feed Roll Speed will 16-Toot H S peei a1 S proc ke t o n Co un t eezlafg Z18 F'ee t per M i riu te)
1 k eoref icaL 6 Knives 3 Knives 2 Knives 6 Knivee J Kn4vee 2 Knives
CASS CUTTERHEA D S P E ED (648 r p m) S m a II PuIIey on C utter hend will Large Pullex on M ai n D rive SHatt 7/16 7/8 1-5/16 Regular R egular Regular s/i s 5/8 1 Special Special Special 7/8 1-3/4 2- S/8 Regular Re guiar R egular 13/ 16 l S/8 s- 1/2 Sp ecial Special Special
LOW C UST ERH EAD s P EE D (450 re m) Large Pmlem o n Cutt er bead with s n ll P ul Ier or M a i n Drive SHaft 5/8 I- 1/4 i- 7/8 Re gula r Re gul ar Regular 1/c i I- 1/ z Specia1 Special Special 1 1/i z- i/ 2 s - / Regular Regular Re gular 1-3/ 16 s -3/ 8 3. g/16' ' SpeciaI Special SpeciaI
NOTE The speciat lengths of cut in above chart
many be obtained only buy using the special
sprocket attachment (3669E) which includes a
16-tooth .count eTshaJt drive s piocLel and a
16-tooth countersha ft interchangeable
sprocket !o replace the 18 -tooth interchangeable
spiockel. For greater capacity and shorter
length of cut in green material, use six knives,
fast cutterhead speeds, and fast feed roll
speeds. For greater capacity and longer length
of cut in dry material, use two tinives, slow
cutterhead speeds, and fast feed roll
speeds. When the cutterhead is adj usted for
two-knife operation, Ltte two-knife arms should
be opposite each other at an angle of 180
degrees. Use only two paddles and locate directly
behind each knife. NOTE Whett km Je are is
removed, ieptace short eap serex in cutterhead
hub to retain grease. Ootrg screws would fiit
cutterhead shajt alien installed through hub,
causing damage to the strew and siiaJI. When
removing three knives from a six-knife
cutterhead, remove the three knives which are
not immediately followed by paddles. Do not
remove paddles. When reversing the location of
the two interchangeable sproekets, pull off the
spring locking pins and, without disconnecting
the chain, grasp prockets by their hubs and
remove them from their respective shafts. Reverse
the sprocket locations and, with the chain on the
sprockets, place them on the shafts. Replace
epring locking pins. When reversing the pulleys,
loosen belt tension adjusting bolt, remove the
main drive belt, and remove the four bolts
holding each pulley. I nter- change the pulleys,
insert the bolts, replace the belt, and tighten.
17
l4
0 PERATI ON AN D ADJ USTM ENTS
ht A I N D R I Y E PULLEYS AND BELT ALIGNMENT
T H RE
PULLFY Vibration in the main drive may be the
result of the main drive pulley being out of
alignment with the cutterhe ad pulley. To
correctly align pulleys (belt must be on machine)
loosen main drive chain idler and loosen the
mounting bolts in the front power take-off
support bracket. Shift the front of the unit
until the main drive pulley on the power shaft
aligns with the cutterhead pulley, then check
belt ten9ion and adjust if necessary. Check
alignment by placing a straight bar across the
sides of both pulleys. ATO' L Whenever beil
tension or power shaft alignment is changed, they
both vilt hate to be re-check ed as movin9 one
aJsects the other. Power shaJt must run parallel
with frame. Tighten bolts in power take-off br ac
ke t and t i g h te n id Ier . NOTE It may be
necessary to adjust drive pulled with washers to
coirectljj ali9n pulleys.
SH FT
18
OPERATION AND ADJUSTMtNTS BELT TENSION The
belt is under proper terttion when it will
deflect 3/4- to I -inch under thirty pounds of
pressure applied midway between the two pulleys.
BOLTS
MA!N DRIVE UHAIN ADJUSIMEN7
ADJUSTING 6OLT
Adjurt belt tension by loosening the chain idler
and loosening or tighten- ing both nute on the
tension adjusting bolt. NOTE. the /our
bmrtar Oek and ligMmed oflsr odjtslizig
belt. MAIN DRIVE CHAIN Tension may be applied or
released in the main drive chain by loosening the
bolt through the idler, then adjusting the idler
to the tension wanted. Retighteri the idler bolt.
19
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16 OPERAT I ON AN D ADJ USTM ENTS K NI FE A D
U ST klE N TS After attaching harvester to the
tractor and before starting in the field, check
the adjustment of the knives. The drive belt
should be tight. CAUTION Be sure the tractor
or engine is not running and the clu tch and
power shaft are disengaged. The following
adjustments of the knives and knife guide should
be main- tained for proper operation. All
cutterhead knives must be adjusted in relation to
the stationary knives as nearly equal as
possible. The clearance between the cutterhead
knives and stationary knife should be adjusted to
.015.020 inch across the full cuttin g edge of
the knives. The clearance between the knife
guide and the cutterhead knives should
be .010.015 inch or .005 inch less than the
clearance between the stationary and cutterhead
knives. ADJUSTING CUT- TERHEAD KNIVES To
adjust the cutter- head knives, loosen knife
attaching bolt and iet screw locking nuts.
Ad- just set screws in or out to obtain .015 to
.020 inch clearance. Tighten lock nuts and
attaching bolts. ADJUSTING STA- TIONARY
KNIFE NOTE Adjustment oJ the stationary kniJe
should be made only aJter no fur- ther adjustment
oJ the cut- terhead knives is possible. To
adjust the stationary knife, loosen the bolt
extending through the slotted hole through each
end of the stationary knife. Turn both adjusting
screws, located under the knife, up into the
beveled holes of the stationary knife. This will
move the stationary knife out closer to the
cutterhead knives. Retighten the bolts at the
ends of the knife. With the feeler gauge, cheek
for proper clearance of the knives.
21
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the link into your browser. The full manual is
available for immediate download. https//www.ebo
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