John Deere 666 666H and 666H Special Tractor-Drawn Moldboard Plows Operator’s Manual Instant Download (Publication No.OMA80958)

1
Y
C
D
OPERATORS MANUAL
0 1 S E P 5 8
O M A 8 0 9 5 8
2
YO U R NEW P LO W Behind your new plow is an or
- ganization that has speeralized in de- sk gnin
g and building plows for over one hundred and
twenty years. This plow was built in the worIds
largest plow factory by experienced men ,
many who have wor ked in this large plant for
from ten to forty five years, thus assuring the
utmost in good de sign, high -grade wor krnati
ship and thorough inspection, so essentia1 to
the production of good plows.
High quality ma Serials, precision production
methods, and accura tely controlled heat
treating assute ma xi- mum strength and long life
for every part.
Occasionally your plow may need ne w parts, or
require service not covered in this m anua1. If
so, we suggest tha t you take advanta ge of the
facili ties offered by your John Deere dealer,
which assure you of gen uine J OHM DEERE Parts
and prompt kn o w-how service in the field or
shop.
This manual has been carefully prepared and
illustrated, so that you may make the necessary
adjust ments for adapting your pt ow to work
proper ly in pr actically all types of soil
and field conditions. T here ad- just ments
such as proper hitching and adjusting for
width and depth of cut, are fully covered in this
manual.
If you will fur nish your dealer with the in
tormation which should be re- corded at the
bottom of this page, when the plow is delivered,
he can give you prompt and efficient ser vice.
Stud y this man ua1 carefully. Keep it handy, in
a safe plac e, for future referen ce.
JOHN DEERE 666, 666H, AND 666H SPEC IAL M
OLDBOARD PLOWS 666 666H , 66fiH S peer a1 i
Date Pure hased .
t9
(To be Jitled in by Purchaser
3
TABLE OF CONTENTS I DENT IFICATION VIEWS
2-4 5-6 ... 733 y y gg 913 12
SPECIFI CATIONS.
OPERATING AND A JUTTING...... . . Importance of
Proper Adjustment .......... Preparing the
Plow.... .. . . . .
Preparing and Adjusting Tractor
....................... ....
. .... . ... ..
Hitching Plow to Tractor. , ................
Plow Hitching Chart.. . . . Types of Hitches.....
.. Hydraulic Control.... Mechanical Control...
..... ........ 13-14 ........ 1415
.. . . . . ............... .
. ... - . . .. .
1s 16 16 y-J g 18 19 19
.... .. . --- -. . . . .
Leveling...... ......
..
Depth of Plowing.....
Rear Axle and Wheel.... . ... ... . . .... . ..
.... . ....... . . . . . Rear Wheel Lift Rod...
. .
.
Lifting Springs ......... ......
......................
Trip Lever Adjusting Spring........ Rolling
Coulters... .
.... .
..... ... .. 7021
... . - - - - - . .. . .
.... 2223 24
Safety-Trip Standards..........
Landing Lever..... ... ... Moldboard Pad..
.. Gauge Wheel..........
. ......................... .... 24 .............
................ .... 2S 2S 26 2f 27 27 28 29
Weed Hook.. J 'nters....... . ... . ..
. .. .. . ... ... ....
. ........ ...... . . . . . ... . . . . , ..
. .......... ...
. . ..
...... . .. .. .. . ..
Root Cutter..........
Tfansportillg ................. , .... , ,
........................
Safety Suggestions..... . Procedure for Setting
Plow......
.. ............. .... ... ..
Reducing Four-Bottom 666 or 666H Plow to a
Three-Bottom Plow
Reducing Five-Bottom 666 or 666H Plow to a
Four-Bottom Plow . . 3033 MAINTENANCE SUGGESTS
OSS 3R3S LUBR ICAT I NG INSTRUCTIONS .
. 36-3T PLOWING DIFFI CULTIES AND REMEDIES . .
. 38-41 SETTING-UP INSTRUCTIONS
............................... 4263 SH IPP I
NG BUNDLES. 42-45
4
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FONTROL
RAcXS
MASTEp LEVER
. f
PÈÃP WHEEL
SAFEIy.tRjp- ANDARD
COULTER
6
LIFT ROD
EVELï NG LEVER
CCLì lqDER MOUNTING
REAR WHEEK
MOLOBOARD
7
LEVELING LEVCR
CYLINOER MOUNTING

SAFTY-TRIP STANDARD
REAR WHEEL LIFT ROD
HOSE SUPPOPT
REAR wHEEL
IOLLINCI COULTER
FURROW WHEEL
MOLDBOARD
n See re g66N 5 ache Z EA ree -ho
for I'rocfor-Are
8
SPECK FI CAT IO NS 666 Clutch-Lift and 666H
Hydraulic -Lift Three-, Four-, and Five-Bottom
Plows, 1 4- and 1 6- Inch Frames. Five-Bottom
Plow Reducible to Four Bottoms, Four-Bottom Plow
Reducit1e to Three Bottoms. 666H Special
Hydraulic -Lift Three -Bottom Plow, 14- and
16-Inch Frame.
TYPES
DEPTH RANGE ,
3 to 1 2 inches, depending on type of bottoms.
BOTTOMS
Various types available as ordered.
WHEELS
666 and 666H .
Equipped with anti-friction bearings. Regular
less tire and tube. Special with 6 70 x IS inch
tire and tube. Equipped with anti-friction
bearings. Regular 1es9 tire and tube. Special
with S 90 x 15-inch tire and tube.
666H Special .
Land 666 .
Regular less tire and tube. Special with 760 x
15-inch tire and tube. Equipped with anti
friction bearings. Regular less tire and tube.
Special with 6 70 x IS -inch tire and
tube. Equipped with anti-friction bearings.
Regular less tire and tube. Special with 5.90 x
15-inch tire and tube. Wheels for use on axles
equipped with either anti-friction or chilled
bearings available. For axles with anti-friction
bearings With 400 x 12 tire and tube, regular
Lese tire and tube, special. Cast, special. For
axles with chilled bearings With 400 x 1 2 tire
and tube, special Less tire and tube,
special. Steel, special. For axles with chilled
bearings With 400 x 1? tire and tube, regular
Less tire and tube, special. Steel, special. For
axles wi th anti-friction bearings With 4 00 x
12 tire and tube, special Less tire and tube,
special. Cast, special.
666H ...
6661-1 Special.
Rear.
666 and 666H .
666H Special . . .
9
SPECIFICATIONSContinued HITCH666 and 666H . .
Plain hitch for wheel-type tractors,
regular. Plain hitch for track-ty pe tractors,
special. Clevis for wheel-type tractors with
offset dra w- bars or forked drawbars with
hitch clevis coupler, re8ular. Connecting loop
for track-type tractors with forked drawbars,
special. 666H Special . . . . Plain hitch for
wheel-type tractors only. HITCH CLEVIS COUPLER
............ Available ae special equipment for
uee with trac- tors with forked -type
drawbars. LIFT . .................. Enclosed
-type clutch for 666 Plow. Hydraulic remote
cylinder for 666H and 666H Special LEVERS.. ..
.. , . .. .. , . .. Adjustable for
length. LANDINO LEVERS . . . . . Tractor-type
available as special equipment.
COULTRRS
17-inch, plain, round shank, regular for 666H
Special Plows, special for 666 and 666H Plowa.
17-inch, plain, flat shank, regular for 666
and 666H Plows, special for 666H Special Plowa.
15- or 18-inch, plain, flat shank, special. l5-
or 18-inch, plain, round shank, special. 17-inch
notched, round shank, special. 1 7-inch
notched,-flat shank, special.
JOINTRRS ........ .... .. Independent cast or
steel available ae special equipment. Combination
caBt Or steel available as special equipment to
be tiaed with round shank coul- ters. ROOT
CUTTERS , . ... .. Available as special
equipment. MOLDBOARD PADS . . . . Available as
special equipment. WEED HOOKS . . ... .. ..
Available as special equipment.
GAUGE WHEEL ... .. ...
Available as special equipment for the Four- and
Five-Bottom 666 and 666H Plows. Available either
lees tire and tube or with 590 x l5-inch tire
and tube.
(SpeNJicalionz and design subject to change
ñtifif notice.) NO' E lYâen term right or
leJt are used, ii means Jrom a postmen betsnd
i pt ord looking toteard the Jroiif.
10
OPERATING AND ADJUSTING INSTRUCTIONS IMPORTANCE
OF PROPER ADJUSTMENT
Your new ploxv is fully adjustable and, when
properly adjusted to oper- ate in the type of
soil and field condi- tione on your farm, it will
do a good job of plowing at a minimum of ex-
pense. A well-adjusted plow pulls lighter
its furrow slices are uniform
in width and depth it covers trash it leaves
the sotl in proper condition to be worked down
into the bext type seed bed. Improper adjustment
results in rapid wear and possible breakage of
parts, and inefficient operation.
PREPARING THE PLOW
BOLTS AND SET SCREWS Before starting to work with
a new plow or one which has been stored, check to
see that all bolts and set screws are tight and
all cotter pins spread to keep them from falling
out. Check the bolts that hold the plow bottoms
to see that they are drawn up very tight.
BOTTOMS AND COULTERS The polished surfaces of the
plow bottoms and coulters have been pa inted
with protective black paint. In most cases it is
not necessary to remove the black paint because
it will wear off quickly upon contact with the
soil. In those soils where the black paint will
not wear off, remove with gasoline, kerosene, or
diesel fuel. lf the plow ia not to be used im-
mediately, protect the polished sur- faces by
applying a coat of cup or
TIRE IN FLATI ON Check plow tires to be sure
they are inflated properly 8B fihown below
Furrow, 5.90 x 15-4-Ply Land 6.70 x 15-4
-Ply Gauge I.60 z 15-4-Pty Rear 4.00 x 12-4-P1y
28 Lbs. 26 Lbs. 24 Lbs. 36 Lbs.
" . "" " ' A good practice is to checlc for
loose bolts, screws, or parts when lu- bricating
the plow. Loose bolta are easily loxt or cause
excessive wear on parta, resulting in possible
serious damage to the plow.
LUBRICATION Be stire plow has been properly
lubricated. See Lubrication Chart on pa gea 36
and 37.
11
OPERATING AND ADJ USTI NG PREPARING AND ADD
USTING TRACTOR
REAR WHEEL WEI GHTI NG In average conditions,
tractor rear wheel weigh'ts are not necessary. In
those conditions where it becomes necessary to
add weight to the réar wheels, eee your tractor
Operator's Manual for we ighting
instructions. Power can be lost and tire Iife cut
drastically by wheel sl ippage. Add- ing weight
also serves to stabilize the tractor when
plowing in rough or hillside fields.
For complete tractor operating in- structions,
refer to your tractor Oper- ator's Man ua1. TIRE
INFLATION In hate the tractor tires as recom-
mended in the tractor Operator's Manual. For
plowing, add 4 pounds more air in right rear tire
than in left rear tire. Proper air pressure is
the most important factor in satisfactory per-
formance and maintenance of trac- tor and
implement tires. Underin- flation will damage
the cord body of the tire and cause a seriee of
radial breake in the sidewall fabric. Thia may
occur on the inner sidewall of the furrow wheel
tire. If the tire buckles or wrinkles, the air
pressure should be increased to where the
eidewalla remain smooth while oper- . g- If
additional traction is required , add weight to
the tractor tires. Low- ering the air pressure
will make little difference in the traction and
may ruin the tires.
LIQU ID WEl GHT Water and calcium chloride solu-
tion is an economical means of add- ing weight
to tractor rear wheels equipped with rubber
tires. Calcium chloride solution is
recommended rather than plain water as it will
not freeze. CAST-IRON WEI GHTS Where weight in
addition to or in place of liquid weight is
required, cast-iron weights can be bolted to
the tractor rear wheels. This type of weight can
be secured from your John Deere dealer.
Check air pressures every two or three weeks. Uee
a special low pres- sure gauge having l-pound
gradua- tions.
12
O PERATI NG AN D ADJ USTI NG
TRACTOR DRAWBAR On whee1-ty pe t ractors set the
tractor draw far in the short high pos i ti o ri
and, e xcep t w here off- hitching is required,
bolt it exact Iy in the center of tractor, midway
be- tween rear wheels. On track type tractors
that work with both tracks on the land the
tractor drawbar should ordinarily be free to
swing.
REAR WHEEL SETT ING 8actor rear wire I set tin gs
arc de-
'errained by the loco tion of the cen
ter line of draft in the plc w. There fore, it
is neccssar y to first read ''Hitching Plow to
Tractor on the followin g pa ges. T hen adjust
the wheels as explained on page 10. FRONT WHEEL
SETTINGS On wide -front -end tractors set front
wheels to conform to rear yhee1 setting,
center-to-center of tread.
HITCHING PLOf TO TRACTOR
The ideal hitch is a straight line from the
center point of pull on the tractor to the center
point of reBist- ance on the plow, both
horizontally and vertically. The center point of
pull on the tractor is located approximately
3 inches ahead of the rear axle hous- ing and
midway between the rear wheels. To find the
center point of resist- ance on the plow, first
find the center line of draft aa explained
below. CENTER LINE OF DRAFT The center line of
draft is simply an imaginary line drawn from the
point of pull on the tractor to the point of
resistance on the HOW The center line of
draft of the plow can be located by uaing the
following rule
Rule The center line of draft of a moldboard
plow is located at a point one fourth of the
cutting width of one bottom measured to the left
of the center of total cut of the plow. (Thia
rule applied to all plows whether one -, two-,
three-, four-, five-, or six-bottom.) Example
Finding center line of draft of a
five-bottom 14-inch plow Total cut of plow 70
inches. Center of cut or one-half of 70 inches
35 inches. One-fourth the cutting width of
one-bo ttom 3-1 /2 inches. 5-1/2 inches added
to center of cut, which is 35 inches 38-I /2
inches. Therefore, the center line of draft of a
five-bottom 14-inch plow is 3g-1/2 inches
measured to the left and at right angles from the
furrow wall. See illustration below.
CENTER LINE OF DRAFT HITCH DRAWBAR
38-1/2"I
POINT OF RES lSTANcE
ze NoraoneeZ hired J/
13
OPERATING AND ADJUSTING
CENTER POINT OF REISISTANCE Thecenter point of
resistance on a plow is located on the bottom
inter- sected by the line of draft, at a point
approximately one-half of the plow- ing depth
frotri the bottom of the furrow. When plowing 6
inches deep, the point of resistance will be 3
inches up from the furrow bottom, or ap-
proximately at the junction of the share and
moldboard. If plowing deeper than 6 inches,
thia point will be located farther up on the
mold- board, If plowing shallower than 6 inches,
the point of reziutance will be farther down on
the share. ADJUSTING TRACTOR WHEEL TREAD
wheel spacing is necessary, always set the
left rear tractor wheel at the recommended
position and rrinve the right rear wheel out..
This will result in more nearly equalizing the
weight on the two rear wheels of the tractor when
pinning. Then center the tractor drawbar between
the rear wheels.
HORIZONTAL HITCH ADJUSTMENTS CEN PER LINE OF
DRAFT
DIAGONAL
lii cpi BRACE CROSSBAR DRAWBAR
nITCH
Adjust the plow hitch no it will be on the ezaet
line of draft from the center point of pull on
the tractor to the center point of resietarce on
the plow. A aeries of holes in the hitch crossbar
allow the hitch to be bolted on the center line
of draft. See il- lustration above rid on page
9. Adjust the diagonal brace ort the hitch so the
plow hitch ie parallel to the furrow wall.
After the plow is in the field, further
adjustment of the diagonal brace may be
necessary to get the correct cut on the front
bottom. Aftef the tractor wheels and plow hitch
have bten set correctly, attach the plow hitch to
the tractor draw- bar. Ofl-Hitching In some
cases, such as with fixed- tread tractors, it is
impossible to set the tractor wheels so the
drawbar will fall on the center line of draft. In
euch eases, it is necessary to off- hitch
the plow and to move the draw- bar of the
tractor away from the center point of pull to
permit the
After the center line of draft and point of
resistance of the plow have been located, act the
tractor wheel8 (on adjustable tread tractors) to
the proper position so the pulling force will be
on a straight line from the point of pull on the
Wactor back through to the point of resistance
on the ploW. Since, in the example on page 9,
the point of resistance ia 38-1/2 inches from the
furrow wall, set the tractor whecli so the center
of the drabbar is 38-1/2 inches from the inside
of each tire, When plowing rim steep hillsides,
it is sometimes necessary, with adjust- able
tread tractors, to use a wider wheel spacing
than recommended for stability reaaon8. Where
a wider
14
0 PERATI NG AND ADJUSTING CCNTER LINE
TRACTOR DRAwBAR
OF DRAFT
MUVEO 8 INOHES
TO LEFT OF UENTER H ITOH DRAWBAR
38-T /2"
'
POINT OF RESISTANCE
PLOW H lTcH)
OFF-HITCHED 7-1/2 INCHES
Mort con i a I Hite h Adju z t me n te
ri we - Be I to m 14 -Sri e A
Off-HitchingContinued plow hitch to be parallel
to the fur- row wall. For example, when using a
five- bottom 14 -inch plow with a 720 or
730 Standard Tractor, the cen- ter line of draft
is 38-1/2 inches from the furrow call while the
wheel tread on the tractor is 46 inches from in-
side to inside of tireB or 23 inches from inside
of tires to center of the drawbar when the
drawbar is bolted in center of tractor. The
difference between 38-1/2 inches and 23 inches,
of course, is 15-1/2 inches. Since ap-
proximately one-half of the off-hitch- ing ahould
be taken on the plow and one-half on the
Wactor, move the plow hitch 7-1/2 inches to the
right of the line of draft and the tractor
drawbar 8 inches to the left of the center of the
tractor. Both the trac- tor drawbar and the plow
hitch will then be 31 inches frog the furrow
wall. The plow hitch will now run straight and be
parallel to the furrow wall.
the land and allow the tractor draw- bar to swing
free. The plow hitch must be adjusted to conform
to the position of the center of the tractor
drawbar. To find this position, measure the dis-
tance from the outside of the right- hand track
to the center of the trac- tor and add 3 or 4
inches to permit driving far enough from the
furrow wall to preven t breaking it down. Then
eet the plow hitch on the hitch crossbar the same
distance in from the furrow wall.
Hitching Chart On the next page are examples of
correct measurements for hitching a plow and
tractor combination. We suggest that you work
out the meas- urements listed for any plow
and tractor combination, using the in-
structions on pages 9-11, and then apply these
same instructions to your plo w and tractor
combination. A handy hitch calculator giving
similar information can be obtained from your
John Deere dealer.
Hitching Track-Type Tractors When using a
track-type tractor with theee plows, run both
tracks on
15
12
OPERATING AN Ei ADJ USTI NG
PLOW H ITCHING CHART John Deere "620," "630,"
"720," "730," "60," or "IO" Series General-Purpose
Tea ctors
Numbar Si ze Tractor Wheel Line of Tractor Ploy Hitch
of of 5ett.i ng Tnci de to Draft. From Draw bar to
Bat I.ozrre Bob to ma I naide of biro Furrow WT T Poeiti on Fu rrow Watt
3 14 49 24-1 /2 Center 24-1 /2
3 1 6" 56 28 Center 28
4 14 63 31- l /2 Center 31-1/2
4 16 72 36 Center 36
5 i4 72 38- I /2 Center u6
S 16 72 44 4 to Left 40
John Deene "G20," "630," "720," "730," "60,"
"70," or "R" Series Standard Trac tors (Fixed
Tread)
3 14 46 24- I /2 Center 23
3 16 46 28 2toL.ett 25
4 14 46 31-1/2 4toIeFt 27
4 1ö" 46 36 6toIcft 29
5 14 46 38-1/2 8toIeft 31
S 16" 46 44 13toI.cft 36"
John Deere "620," "630," "720," "730," "60," and
"70" Series Standard Tractors (Adjustable Tread)
3 3 4 S S
14 16 t4 16 l4 16"
49" 56 62 62 62" 62
24-1 /2 28 31-1/2 36 38- I /2 44
Center Center Center 2 to Left 3-1/2 to Left 6
to Left
24-1/2 28 31" 33 34-1/2" 37
John Deert "820" and "830" Seriea
Tractors Equipped with f8s26 Rear Tires ozs 6
Wide Rizna Setti ng
Narrow Setting Wide
14 49 4 14 56 311/2 31- t /2 3-1/2 to Left Center 28 28
4 16 49 4 16 56 36 36 5-3/4 to Left 4 to Left 30- l /4 32
16 49 56 38-1/2" 38- I/2" 44 7 to Left 5- l /4 to Left 9-3/4 to 31-1/2 33- I /4 3't- I /4
16 56 44 8 to Left 36"
NOTE When "880" or "830" fi'eries 'Trarlors
are equipped tc/J/t other than 18 z fl6-iorh
tites the mortar drawbar position and plow hitch
lo jt/rrm wall dfme tsTons wtll a jj sifightlg
occordTxg lo tile sizes. E'ronl lire selling
should eon-
16
O PERATI NG AN D A DJ USTI N G YERTI CAL
HITCH ADJUSTMENTS ADJUST ING H II FS
CENTER LINE OF DRAFT
CLEVI? J AWS
POINT OF RESISTAN OE
Adjust the clevis jaws on the plow so the plow
hitch will fall on a straight line from the
tractor drawbar to cen- ter point of resistance
on the plow. Four holes are provided in each
clevis jaw for this adjustment. II the clevis
jaws are adjusted too high for the depth of
plowing, the tractor will pull down on the front
end of the plow. The bottoms will bounce alon g
on the points of the share, resulting in heavy
draft, un- even penetration, excessive wear on
shares and wheel boxes in land and furrow
wheels, and a poor job of plowing. If the rear
wheel attempts to run up the furrow wall, it is a
good indication the clevis jaws are set too
high and you are pulling down on the front end of
the plow. If the clevis jaws are adjusted too low
for the depth of plowing, the tractor will
pull up on the front end of the plow. The bottoms
will pene-
trate very slowly, resul ting in ex- cessive
weight on rear wheel of the plow and a wavy
furrow bottom.
Hitch Clevis Coupler A hitch clevis coupler is
availa ble as special equipment for attaching
these plows to the 720 and 730' Series
Tractors whirh have the forleed or clevis type
drawbar. This cou pler will raise the vertical
hitching point to the recommended height.
TVPES OF HITCHES
These plows are furnished with plain hitches
only because safety- trip standards eliminate
the need for release-type hitches. A plain
hitch for use with wheel- type tractors is
furnished as regular equ ipment, while a plain
hitch for track-type tractors ig available as
special equipment for the fi66 and 666H
Plows. The hitch used on the 666H Spé- cial Plow
is supplied with a clevis for
wheel-type tractors with offset draw- bars or
forked drawbars eq uippcd with a hitch clevis
coupler. The clevis furnished as regular
equipment for the 666 and 666H Plows can be
used with wheel-type tractors having either an
offset or a forked drawbar with hitch clevie
coupler. A hitch Ioop is available for these
plows when used with track- type tractors
equipped with forked drawbars. See illustrations
at top of next page.
17
OPERATE N AN D ADJUST i NG TYPES OF
HITCHEMContinued
FILLER BLOLKS
Pit'ah Cfc rir for Uheel- Type Trae tar with Odes
t Dry inb r or F'or bed Dro fiobor fioit h to up
ler The hitch supplied for the five bottom plow
to be used with a wheel- type tractor has two
filler blocks which may be positioned between
the crossbar and the hitch clevis on the clevis
jaw, as shown above at
?fi tel Loo p for Traeh- T y pe 7rocfor with
Fgrbed Dr iubar
left, when the hitch drawbar is off- hitched.
When hitch is positioned between hitch
clevises, store filler blocks as ghown in
illustration above at right,
HVDRAULiC CONTROL
ATTACHING PI SPRING LOCK ING
ADJUSTABLE STOP
HOLD-UP PIN I N TRANSPOPT! NG POSi TION
On the 666H and 666H Special Plows the remote
hydraulic cylinder raises and lower8 the plow and
con- trols the depth of plowing.
The 666H and 666H Special Plowa can be equipped
for hydraulic oper- ation with J hn Deere
Powr-Trol or the hydraulic sy8tetri of any trac-
18
0
PERATI NQ AN D ADJUST ING
15
tor havin g sufficient capacity and utilizing
a remote cylinder that con- forms to ASAE-SAE
standards. Your John Deere Remote Cylinder is
equipped with an adjustable piston stop, 8o the
worming effoke may be adjusted to control the
working depth of the plow. The stroke may be
varied from 8-inch maximum to 0-inch minimum. For
complete op- eratiztg azzd adjuetizsg instruc-
tions for remote cylinder, refer to your tractor
Operator's Man ual. When transporting, raise the
plow bottoms to highest position by use of the
remote cylinder and insert hold-up pin in
transport position as shown on page 14. ATTACH I
NG HOSES AND INSTALLING CYL I NDER Before
attaching hoses to tractor, relieve pressure in
the tractor hy- draulie system. To relieve
pressure, stop tractor en gine and move remote
cylinder con trol lever back and forth several
times. Wipe hose ends to remove any dirt before
inserting in breaL- aha y coupli rigs. All
trapped air in the cylinder must be removect
after hoses are connected to breakaway
couplings. To remove trapped air, first place
cylinder on tractor transport arm with hose
end up. With engine stopped, engage pump.
Then etart engine and operate the remote cyl-
inder control lever back and forth seven or
eight times. With hold-up pin in transport posi-
tion, install cylinder on plow. Then move pin to
operating position. Attach hose to hose support,
using S-hook and clampa provided. Adjust the set
screw collar on the hose support so the rod will
not in- terfere with either the plow or trac- tor
when turning. REMOVING CYLINDER Place the plow
tn the lifted or transport position. Remove
hold-up pin frorr operating position and place in
transport position. Release load on
the cylinder and remove sprin g-lock- ing pins.
Tire plow will be field in the lifted poei tion
and ca n be trans- ported witho ut replacing
the cyI- inder. MECHANICAL CONTROL The 666 Plows
are raised and low- ered by the enclosed clutch.
A rope attached to the clutch trip lever con-
trols the enclosed clutch. To lift the plow
bottoms out of the ground for turning at the end
of a row or for transporting, simply give the
trip rope a quick positive pull. To lower the
plow, pull the rope in the same manner. NOTE
Do not use a sts steady pull sitice it will
cause the cfufcfi io continue frippittg. CAUTION
Do not use an ex- tensionon clutch trip lever.
Use of an extension may cause clutch to repeat or
miss due to whip- lash action of loztg lever. The
enclosed clutch on these plows provides constant
lift so plow will raise completely to give full
trans- port and trash clearance regardless of
depth setting. Cushioned drop protects the
plow bottom parts as the plow is lowered to its
work.
TR1 P ROP
NCLOSE
CLUTCH
19
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IG
O PE RATIN G AND ADJUST I NG
LEVELING
DEPTH OF PLOW'IMG
DEE.P SES TI NCi
I LEVER
Leecfing Leoer
CONNEUTINC\ HAR
The leveling lever on these plows is used for
leveling the plow bottoms when in working
position. The lever regulates the depth of the
front bot tom in relation to the rear. Once the
plow i8 leveled, plowiiig depth may be changed
without af- fecting leveling except in caaea
where extreme changes in the depth of
plowing are made. Then a alight ad- justment in
leveling may be necks-
Depth can be set from approxi- mately 3 to 12
inches. There will be some variation in these
figures, depending on type of bottoms need.
666 PLOW On the 666 Plow the master lever and the
lever connecting bar setting controls the
working depth of the bottoms. Two holes in the
lever connecting bar provide adjustment for
shallow and deep plowing. For deep plowing,
attach as shown in above illustra- tion. For
shallow plowiag, attach lever connecting bar to
lever with pin through second hole as indi
cated. After the connecting bar has been eet, the
master lever controls the depth of plowing
within the range of the ehattow or deep setting,
A series of holes in the leveling lever sections
allow the length of the lever to be adjusted to
within easy reach of the operator. To adjust, re-
move bolts and elide upper end of lever to
desired length. Reinstall bolts and tighten
secctrely. Alao, ad- just dog rod by loosening
clamps and sliding to desired length. Tighten
clamps securely. CAUTION t Do not ad- just the
lever too long. If lever is too long, it
may tzzterfere with the operator or damage
the tractor whezz croea- Ing deep furrows or
ditches.
666H AND G66H SPECIAL PLOWS On the 6fi6H and 666H
Special Ptows the remote hydraulic cylin- der
controls the depth of plowing within the range
of the cylinder. See your tractor Operator's
Manual for operation of the remote hydraulic
cylinder.
21
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