Sears SS/16 User manual

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ISears I
owners
manual
-·;:; ~\
MODEL NO .
91 z25751
tl'ia.vt ~,,~' mc ~ t't? (
fi<A fr) bPv· pr-P1S1.31?8
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4485R
I \),_
55/16
GARDEN TRACTOR
• Assembly
• Operating
• Maintenance
• Repair Parts
Sears, Rof'buck and Co., Chicago, Ill. 60607 ·u.S.A.
and Sirn . psons Sears Limited , Toronto
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GUARANTEE
Your Tractor is guaranteed for one full year. If any defect in material or workmans hip
should appear during this time, simply contact our nearest Sears store or service center
throughout the United States or Canada. We will make all necessary repairs, including
ports and labor, at no charge to you. Tractors equipped with batter i es: If battery proves
defective and will not hold a charge, in exchange for the batte ry, we will: During the
first 90 days-replace battery at no charge. After 90-doys-reploce battery, charging cus-
tom er 1/ 12th of the price of the new battery for each full month from date of sole.
If the tractor is used for commercial or rental purposes, this guarantee oppl ies for thirty
days. Guarantee continued on the inside of the back page.
SEARS, ROEBUCK AND CO. - SIMPSON-SEARS L TO.
SAFETY PAYS OFF
IMPORTANT
rules for safe operation
TRA I NING
1. Read the Owners Manual carefully and fully
familiarize yourself with the controls and
proper
use of your tractor as well as any at-
tachment. Be prepared to stop the eng i ne and
powered ottachment (s) on a second's notice.
Only per ·sons we l l acquainted with these Rules
for Safe Operation should be allowed to use
your tractor.
2. Do not allow ch il dren or young teenagers to
s tort or operate your tractor.
3. Do not allow anyone in the area while op -
erating your tractor. Keep the chi ldren and
pets in the bock yard while using it in the
front yard. Keep a wary eye out for children
or passers - by. Di sengoge the power to all
attachments and stop the engine while they
are in the vicinity of your tractor. Children ,
par tic u la rly coul d get in the way of and be in·
ju re d by the tr ac to r or on attachme nt.
PREPARATION
expansion, do not fill it to the brim and keep
in mind that the heat of the sun can cause the
gasol ine to expand. Wipe off any spilled gas-
oline before starting the eng ine. Remember,
gasoline is highly flammable and mu st al ways
be handled with extreme care.
6. A tractor and all attachments ore pre,is i on
pieces of equ i pment, not playthings, therefore
extreme caution must be exerc ised at al l times.
7. Never attempt to operate a damaged tract or or
attachment, always repai r any damage before
attempting to start or operate your tracto r or
attachment.
8. Never attempt to corry any passe ngers, th eir
safety as well as your safety wi II be endo ngere ....
9. Before attempting to start the eng ine of your
tractor make sure the gear shift l ever is in
neutral and the power to all attachm ents i s
disengaged, then firmly apply the foot brake
and be sure to release the parking bro ke. The
parking broke must always be di sengaged when
you
put the tractor in mot ion. If the tractor is
operated with the parking brake engage d seri ous
damage may resu lr.
4. Do not operate the tractor when barefoot or 10. Each time before leaving the operato r's seat,
wearing open sandals. Always wear substantial be absolutely sure the power to all attac hments
footwear, preferably stee 1-toed shoes. AI so, is disengaged, the pork ing brake is e ng aged,
do not wear l oose fitting clothing that could the gear shift lever is in neutral, the engine
~ .
get caught in moving ports. is shut off, the attachments and all moving
5. Check your fuel supply before each use. Never ports hove completely stopped and the igniti on ~
remove the gas cop or fil l the gasoline tonk key is removed. Never leave the operat or's
When fill ing the fuel tonk, leave space for running. Always get on or off your tractor from
when the engine is running or while it is hot. seat with the engine or any powere d attach m ent '
~ ' - ~ ~ - ·h· ~·f~ .....
--
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/
opera tion (cont.)
11. Always operate your tractor in daylight; dus k
or dark - use your l ights.
12. Operate your tractor at safe speeds on wet or
sIi ppery su rf aces, where t roct ion i s unsure.
Never at o speed which co uld cause o skid.
OPERATION
13.
14.
15.
16.
17 .
18 .
Do not attempt to change the governor setting
or overspeed the engine. The governor controls
the engine speed and protects the engine from
damag i ng, excessive speeds . Excessive engine
speeds ore dangerous.
When s tart i ng your engine on tractors equipped
with o pull starter, stand firm and make sure
your feet or e well away from o II powered at-
tachments .
Never p lace your h ands or feet in or under any
powered attachment or near any moving ports
while the tractor or any powered attachment
is running. •
Always disengage the power to all attachmen ts,
set the parking broke, shift i nto neutral, shut
off the engine, make absolutely sure any power-
ed attachment and all moving parts hove com-
pletely stopped and remove the ignition key
each time you dismount your tractor, even for
a second. Childr e n, yourself, other persons or
pets may be endangered.
If your tractor or any attachment should inad-
vertently strike o foreign ob j ect, immediately
di sengoge the power to the attachment, set the
pork ing brake, shift into neutral, shut off the
engine, make absolute ly sure any powered
attachment and all moving parts hove com -
pletely stopped, remove the ignition key, dis-
connect the spark plug wire from the spark
plug and keep the wire away from the plug to
prevent in jury or occidental starting, then
thoroughly, inspect the tractor or attachment
for any damage . Such damage must be repaired
before restarting and operating the tractor or
attachment.
If the tractor or any powered attachment should
start to vibrate abnormally, p lac e the control
lever for po wered attachments in the disengaged
posit ion, set the parking broke, shift into
neutral, shut off the engine, make absolutely
sure the powered attachment and all moving
ports hove complet el y stopped, remove the
ignition key, disconnect the spark plug wire
from the spark plug and keep it away from the
plug to pr event i njury or occidental starting,
then check immediately for the cause of this
vibration as vibration is generally a warning
of trouble.
19. Before adjusting, cleaning, repa1r1ng or in-
specting your tractor or any powered attach-
ment, dis engage the power to al l attachments,
set the parking broke, shut off the engine, make
absolu tely sure the powered attachments and
all moving ports have completely stopped ,
remove the ign it ion key , d iscon n ect the spark
plug wire and keep it away from the spark plug
to prevent in j ury or accidental sta rting.
4485R-23.4.73 • 2 •
20.
21.
22 .
23.
24 .
25.
26.
27.
28 .
29.
30.
31.
Do oot '"" the eog;oe ; odoo" b"'"'" th< ~
engine exhaust fumes contain carbon monoxide
which is a ta steless, odorless, de a dly poison.
N ev er operate your tractor upon o t err ace,
slope or inc lin e that is too steep to preserve
good stability and control in order to prevent
ti pping or sideways upsets. Always operate o
tractor up and down such on inc I ine, at a slow
spee d, do not operate it across. Always ex-
ercise extreme caution when changing di rect i on
on inc I ines. Never attempt to operate your
tractor on steep terraces, slopes or inc I ines
with mo re than a 15 degree slope.
Do not start or stop suddenly when going up or
down a terrace slope or incline . If it is ne-
cessary to stop your tractor upon an inc I ine,
do so firmly to prevent the tractor from picking
up speed during declutching and before reach-
ing the brake position. Do not shift gears while
going up or down inclines. Choose a gear low
enough to negotiate the incline without stop-
ping and shifting gears . To reduce the speed of
the tractor on an in cI ine move throttle l ever to
slow.
Never attempt to operate your tractor or any
attachments without the proper shields, guards,
plates or other protective devices in place and
fully functioning.
Before and while attempt in g to back up, l ook
carefully to be absolutely sure that children,
bystanders, pets, foreign obje c ts or obs t acles
of any kind are not behin d you.
Never allow anyone near the tractor or any
attachment while they are operating.
Be sure to exercise special core when operating
your tractor around fixed ob j ects in order to
. prevent the t ractor or any attachment from
striking them. Never delibe r ate ly run a tractor
or an attachment into or over any foreign ob-
jec ts .
Use care when pulling loads. Use only approved
drawbar hitch points. Limit l oads to those you
con safely control. Do not turn sharply. Use
counterweight or wheel weight(s) when suggested
in the attachment Owners Manual.
Never shift gears to reverse your direct ion of
travel until the tractor comes to a complete st op.
Always stay alert to avoid holes in the terrain
and other hidden hazards . Tipping or sideways
upsets can happen easily in holes or ditches.
Use low gear on unfamiliar ground. If the tractor
or any ottachme~t becomes stuck in a hole,
always disengage the power to all attachments
before attempting to free it .
The use of any preci s ion piece of power equip-
ment requ ires your fu II concentration and at-
tention to the j ob being done in order to pre-
ven t i njury or d amage.
A lw ays disengage the power to all attachments
when not actually in use such as when crossing
a gravel driv e, sidewalk or roa dwa y or when
t ransporting the tractor.
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f -
I
rules for safe operation (cont.)
32. Watch out for traffic when crossing or near
roadways.
MAINTENANCE
33. Keep
all nu ts, bolts and screws tight in order
to be sure that the tractor and any attachment
is in safe working condition. Be sure thebrake
and all powered attachment controls are always
in proper adjustment and repair. Check the
attachment and engine mounting bolts at fre-
quent
intervals for proper tightness. Before
performing any maintenance, always disengage
the power to all attachments, set the parking
brake, shift into neutral, shut off the engine,
make absolutely sure the powered at tachment
and all moving ports have completely stopped,
remove the i gnit ion key, d isconnect the spark
plug wire from the spa rk plug and keep it away
from the plug to prevent injury or occidental
starting. The only exception to this rule is
carburetor adjustment e 12.
introduction
34.
35.
Keep the engine f.ee f<om aocumula ti an• a ~
grass, leaves or excessive grease as th ese
accumulations ore combustible and co uld r es ult
in a fire. Always keep your tracto r and a ll
attachments in good operating co ndition and
make
sure that all shields, guards , pl at es and
other protective devices ore in p lac e. Give
your
tracto r and all attachments the reg ula r
maintenance they need and hove a competent
serv i ceman make a thorough inspect ion of them
at least once a year.
Do not store your tractor for prolonge d peri ods
(more than 30 days) with gasoline in the to nk.
Do
not store your tractor or a gaso lin e co n·
tainer insid e a building where fumes m ay rea ch
an
open flame or spark, they should be store d
in a cool, dry place. Be sure to let the eng i ne
cool before storing in any enclosure. Always
use an approved gasol ine container for stor i ng
gasoline and keep your tractor, attac hments
and gasoline container in locked storage to
prevent children from playing and tamper ing
with them.
Thi s
tractor has been desi gned, engineered and manufactured to give you the best possible dependability and per-
formance.
Should you experience any problem you coonot easily remed y, please contact your nearest Sears , Roebuck or Simpsons
Sears, Ltd. Store. They have well qualified, competent trained technicians and the proper tools to service or repa ir
this unit.
It is important that the operator ALWAYS OB ERVE THE "RULES FOR SAFE OPERATION" as well as other
instructions contained in this Manual. We hav provided this Manual to help you operate your Tractor w ith utmost
efficiency. We u rge you to study th is Manual so you will understand your new Tra'ctor thorOJghly before operating i t.
We sugg est that you toke ca re of your Manual so that it wi ll be available for future reference should you need i t.
table of contents
GUARANTE E
RULES F OR SAFE OPERATION
ASSEMBLY INSTRUCT IONS
OP E RA T ING INS T RUCTIONS
MAINT E NANCE INSTRUCTIONS
R EP AIR P AR TS
assembly instructions
l - 3
3 . 5
5-7
8- 14
15 - 44
A letter in parenthesis in the following i nstructions refers to on arrow in the adjoining Figure (illustrat ion), exce pt
when
otherwise stated. When R.H. (Right Hand) or L.H . (left Hand) is used, it should be understood to mean as if
one
were seated on the Tractor seat facing forward.
1. Remove battery . Cu t bonding holding Tractor to bottom of crate.
2. Your Tractor has been completely assembled at the factory except, to fill, charge and i nstall the battery. The
battery was shipped dry. Instructions ore given on page 4 for filling, charging and installation.
3. Your Tractor was lubricated at the factory however, we suggest you follow the Lube Chart on page 10 before
operat ion.
4485R-23 ..1.73 - 3 -
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Tires were over-inflated for shipping purposes . Reduce air pressure to 12 lbs. in front tires and 12 lbs . in rear
tires. This will improve traction and give you the comfortable ride you will wont.
5. A plastic bag of ports was shipped with your Tractor and should be opened at this time . It will contain the fol-
lowing items:
1 • Battery Clamp
2 • Wing Nuts
2 • Battery Bolts
2 • Flat Washers
(These items hold battery in position on Tractor.
They are used in step 5, page 5).
fill and charge battery
CAUTION : DO NOT ASSEMBLE BATTERY TO
TRACTOR UNTIL BATTERY HAS BEEN FILL-
ED AND CHARGED.
FILL BATTERY AS SHOWN
DO NOT OVERFILL __
CORRECT LEVEL IS BOTTOM OF
TUBES IN CELLS.
1. Fill battery with electrolyte and charge battery
as outlined in instructions in battery container.
t~OTE: After filling cells, let battery stand for
thirty (30) minutes. Recheck acid level, add more
electro lyte if necessary, then charge battery at
a rote not exceeding three (3) amperes for about
2)12 hoors. CORRECT LEVEL IS BOTTOM OF
TUBES IN CELLS.
CUT -AWAY VIEW
OF BATTERY
......... -.... - ...._-..... -- ----- .......... --
____ ..__ ------
---------------
-------- ------
--...._..,...___,_.., --------..J--
,: _,..., _____ --- -_: ---- ~ Z ~::::. BATTERY
--;.__ :_--- ;L;CTRO~ Y;E ----:-:~ CELL
FIG. 2
4485R-18.6.73 - 4 .
2 • Hex Nuts
(They secure ground strap and positive cable
to battery. They ore used in steps 6 and 7,
page 5).
2 • Ignition Keys
(We suggest one key be removed from the wire
ring and kept in a safe place. Position the
second key in the Tractor ignition).
There will be an amount of electrolyte (acid) in
the container after battery is filled . This should
be disposed of and not used at a I ater date to
refill T rocto ror any oth er battery. Using a common
5
gallon polyethylene garbage con or pail, fill
with a minimum of four inches of water. Avoid
spillage on person or clothing, add left over
electrolyte to water. Then sodium bicarbonate
(baking soda) should be added and the mix ture
stirred or agitated until the addition of bicar-
bonate no l onger causes foaming. Agitate with a
wooden or plastic stoke or stick only. It will
now be safe to dispose of th is down a reguiar
sewage system. Since the product is well neu -
tralized, no criticism from authorities should
result.
It is preferable, where permissible, to burn the
empty acid pok to prevent possible fu rther con-
tact with acid.
battery installation
FIG . 3
2. To lift hood assembly (A), grasp each side of
hood
at rear and pull outward and upward. Lift
hood to its extreme forward position.
3. Remove tope holding plastic tray (B) in trac tor .
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FIG. 4
FIG. 5
4. Place battery (C) in piast ic tray (B) with battery
terminals to rear of tractor as shown.
5. Assemble battery clamp (D) to one of the two (2)
battery bolts (E) with a 5/ 16 x 3/ 4 flat washer,
and wing nut above clamp as shown. Hook lower
end of battery bolt in slot in side of battery sup-
port as shown. P lace clamp across top of battery,
and secure other battery bolt to battery support
and clamp with other flat washer, and wing nut .
Tighten wing nuts securely.
6. Connect cable and cover (F) Fig . 5 to plus (+)
term
ina I battery. Secure with !t4 hex nut found
in
plast ic bag. Tighten nut securely.
7. Connect ground ca ble (G) (Fig. 5) to nega tive
(-) terminal of battery. Secure with other !t4 hex
nut found in plasti c bag. Tighten hex nut securely.
4485R-23 .4 .73 - 5 -
seat pos ition
1. The seat (A), may be moved forwar d, or ba ck-
ward, to give the most comfortab le, and safe
operating position. To move the sea t, ti p seat
forward, as shown in Fig. 6 . Loose n nut (B)
slide seat (A) to desired position. Tighte n nut
(B)
securely. Make sure that seat plate we ldment
(
C), has not twisted out of alignment , with seat
spring (D).
instructions
operating
controls
FIG. 7
before
The following controls are used to operate the Trac-
tor:
l. Clutch and broke foot pedal is locat ed on the
left side foot rest. The foot pedal operates a
combination brake and drive clutch. There ore
three positions of operation on the foot pedal.
a. The clutch is in DRIVE position when the
pedal is all the way out (when the foot is
removed from the pedal).
b. The clutch is in NEUTRAL when the pedal is
depressed half way or more.
c. The BRAKE is on when the pedal is de-
pressed all the way forward.
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2. The tronsoxle (transmission) gear shift lever
(A), is loca ted at front, center of seat.
a. The gear shift lever selects the FORWARD,
NEUTRAL and REVERSE gears.
3. To engage parking broke, pull pork broke lever
(B), to rear (lock) position. To release parking
broke, push leve r (B), forward.
FIG. 9
4. The high-low range shift lever (C), is l ocated on
R.H. side of chassis, just forward of rear fender.
The high-low range lever has 3 positions, up for
high-range, center for neutral and down for low-
range. There ore 2 neutral positions in trons-
mi ssion, one on the gear shift lever (0 ), and
one on t he high-low range lever {C). Both levers
must be engaged for Tractor to operate: Place
both levers in neutral for pushing of Tractor or
when Tractor is be i ng towed . Refer to " Towing
T roctor ", page 7.
4485R-23 .4. 73
FI G. 10
1. Roi se hood.
2. Engine crankcase is shipped with oil ready for
use. However, check oil level before starting.
If necessary, odd oil to bring oil level up to ful l
mark on the dipstick. Dipst i ck must be pushed
down tight for checking oil level, and tractor
should be level. NOTE: Do not fi II above full
mark on dipstick. Use Al lstat e S.A.E. 30 oil or
equivalent for summer use. For winter use, below
32°, use Allstate Multi-grade oil S.A.E. SW - 30,
1 OW or equivalent. Nothing shou ld be added to the
recommended oil . Make sure the oi l used is a
high quality detergent oil c lassifi ed "f or service
MS, SO, SC or SE. Because of recent changes in
the classifications, the oil container may show
one or a combination of these recommended class-
ifications. CAUTION: Do not overfill crankcase.
Do not use service OS oi I. Do not mix brands nor
grades of motor oiI.
3. Fill fuel tonk with a good grade of fresh, CLEAN,
regular gaso l ine. Wipe off oil spilled fuel and oil.
NOTE : Gas tonk is located under tractor seat . T i lt
seat forward, so fue l can be added to gas tonk.
Refer to Page 5 Fig . 6.
operating instructions
how
to start and stop
c
FI G. 11
l . Pull out choke control (B), to fuil choke pos i tion
to start in cold weather .
. 6. (CONT. ON PAGE 7) .
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operating
(cont .)
instructions
2. Advanc e thro ttle control lever (C), to about Y2
thro ttle .
3. T
his Tractor is equipped with tw o safe ty sw i tch -
es . One switch i s located on the gear shift lever
(D, F i g. 9, Page 6, at point E) . The other switch
is l ocated on attachme nt cI utch lever (C , Fig. 3,
Page 4). The gear shift leve r must be in neutral
(center posi tion}. The attachment clutch lever
must also be in d ise ngaged ( out), pos it i on for
e ngine to start. Turn key (F, Fig. 11, Page 6),
in ignition-starter switch clockwise to engage
starter. When engine starts, release key . Afte r
engi
ne star ts, push in choke control as engine
warms up. Let engi ne warm up before applying
load. CAUT I ON: Do not run starter cont i nuously
for mo re than 30 seconds at a time. If afte r
several at temp ts, engine does not start, move
thro tt le control (C), to fast posit io n. Wait two
minutes and try again.
NOTE: If at tachment clutch lever in te rferes with
attachment to be used, r emove handle.
CAUT I ON: F i rst move handl e to "OUT" position,
th en remov e nut and handle. Save for us e with at -
tachment for which it is requi re d.
4.
To stop engine, turn ignition key in a counter -
clockw is e di re ction to OFF posit i on. Key should
be removed to prevent unauthorized operation.
safe operating
l. Try your Tractor in a large, open space . Learn
to start, stop and reverse.
2. Start the engine and put the throttle lever at
about 1/3 throttle. Push down on foot pedal,
move gear shift lever and range shift lever to
speed desired. Release foot pedal slowly, and
Tractor will start to move. After foot pedal is
fully released (clutch engaged), move throttle
lever to fast position. If ground travel is too
f
ast, reduce throttl e lever to about Y2 throttle or
depress foot pedal and shift to a slower ground
travel speed. Always select a ground travel
speed that will suit attachment being used and
not overload the eng in e.
3. Do not shift gears while Tractor is movi ng.
4. To stop Tractor, p ush foot pedal all the way
down and reduce throttle lever to about Y2 throttle.
D isen gage power to attachment. Move gear shift
lever to n eut ral, set park in g brake lock and re-
lease foot pedal . Always check to make sure
brake lock w il l hold Tractor secure. Shut -o ff and
remove key from swi tch . This will prevent un-
author i zed operation. Keep key in a safe place
out of reach of chi ldren . Never l eave eng i ne
runni ng w ith Trac t or unattended.
&485R-23.4.73
- 7 -
5. Do not operate the Tractor in high gear going
down hi ll. Do not turn sharp corners while
going down hill. If it is necessa ry to stop
Trac tor while going down hill, do so quick ly to
prevent Tractor from picking up speed during the
declutching to brake position.
NOTE: The engine produces consid er ab le brak-
i ng action when throttled bock to idling speed
without dec l utch i ng. This procedure is re-
commended before applying brake.
DO NO T OPERATE TRAC TOR ACROSS SLOPES.
DO NO T OPERATE TRACTOR UP OR DOWN
SLOPES W IT H MORE THA N A 15 DEGREE SLOPE.
6. Do not shift gears whi le going up steep hills.
Choose a low enough gear to climb hill without
stopping and shifting gears. If it is necessary
to stop while goi ng up hill, do so q uickly to
prevent T recto r ro IIi ng bac k ward. Before star t-
ing Tractor in mot ion going uphill, use one of
th e lowest gears. Reduce engine sp eed and en-
gage clutch gradually to preven t T roc tor from
"rearing up".
7. Upsets can happe n easi ly in d itches. Stay alert
for hol es or other yard hazards.
8. If tra cto r becomes mi red in a hole, try to bock out
rather than d ri ving f orward.
towing tractor
1. Place gear shift l ever and ra ng e shift lever in
ne ut ra l pos i tion . Tractor ca n then be tow ed at
a reasona ble safe speed no t faster than 6 miles
per hour .
eng i ne pulley grooves
to use for your various
attachments
EN GINE
MAI N DRIVE BELT
TO TRANSMISSION
SICKLE BAR
MOWER
FIG. 12
E NG INE
PU
LLEY
~
COMI'OST MI LL
ROTARY SW EEPER
POWER SPRAYER
I
~
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maintenance
instructions
air cleaner
.CAUTION: If air cleaner becomes too d irty , engine
w il l not rece ive sufficient air to run properly. Symp·
toms: Loss of power, flooding, hard to star t and ~ver-
heating. NUT
PAPER
ELEMENT
POLYURETHANE
PRE-CLEAN ER
HOSE
INTAKE TU BE
FIG. 13
Th is engine is equ ipped w ith a paper element and o
polyurethane precleaner that must be removed, clean-
ed and oiled ever y 25 hours of operation, or more
under e xtremely dusty conditions.
1. WASH
2. SQUEEZE DRY
3. COAT WITH O IL
4. IN STALL OVER PAPER ELE MENT
FIG. 14
1. To clean pre-cleaner wash in water and detergent
r efe r ri ng to F i gure 14. Remove excess water by
squeezing like a sponge and allow to dry tho -
roughly. Di stribute th ree tablespoons of SAE 30
engine o il evenly around the pre-cleaner. Knead
into and wring excess oil from pre-cleaner.
2. Depending on conditions in which the tractor is
operating, the i nn er paper element should be re-
placed whenever it becomes excessively dirty.
4485R · 23 .4. 73
. 8 .
CAUTION: NEVER RUN THE ENGINE WITH
THE AIR CLEANER REMOVED . DIRT WILL
ENTER THE ENGINE AND SCORE THE CY -
LINDERS.
cooling system
CLEAN OUT
CHAFF AND DIRT .
FIG . 15
COOLING SYSTEM : Ch eck and c lean cooling fins at
leas t eve.; 50 hours . Remove any dust, dirt or oil
wh ic h may h ave accumulated. Remove any ahaff from
1tati ng and sta t ionery b low er sc ree n.
CAUT I ON: Plugged or clogged cooling fins or blower
screens can cause overheating and engine damage.
THIS TRACTOR HAS AN AIR COOLED EN .
GINE. AIR MUST BE ABLE TO CIRCULATE
FREELY
AROUND THE ENGINE, TtiROUGtl
THE SCREEN GUARD AND GUARD (ROTARY
SCREEN), AND OVER THE FINS OF THE
CYLINDER BLOCK. KEEP THESE AREAS
FREE OF ACCUMULATED DIRT AND TRASH
OR THE ENGINE WILL OVERHEAT AND
RESULT IN DAt1 i AGE TO ENGINE..
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engine lubrication
STOP ENGINE AND WAIT SEVERAL MINUTES
BEFORE CHECKING OIL LEVEL.
BE SURE TRACTOR IS ON LEVEL GROUND
AND ENGINE IS STOPPED BEFORE CHECK-
ING OIL LEVEL.
I
OIL FILL TUBE AND DIPSTICK~
1. Change oil in crankcase after FIRST 2 HOURS of
operation. Engine shou ld be worm when oil is
changed.
2. To drain oil, unscrew oi l drain plug at low er R. H.
side of engine. Catch oil in suitable container.
3. Refill engine crankcase with oil as inst ructed
under "Fue l and Lubricant", page 6. Capacity
4 pint~ Check oi I level after each 8 hours of
operation and odd oil, if necessary, to bring to
correct level on di pstick.
4. After first oil change, oil should be changed
after each 25 hours of operation . In extre mely
dirty or dusty cond i tions, change oil every 15
hours of operation.
NOTE: THE BEST TIME TO DRA IN OIL IS AT
THE END OF A DAY'S OPERATION AT WHICH
TIME THE OIL IS HOT AND ALL DIRT AND
FOREIGN MATERIAL IS SUSPENDED IN THE
OIL.
IMPORTANT : BE EXTREMELY CAREFUL TO
PREVENT DIRT OR FOREIGN PARTICLES
FROM ENTERIN G THE ENGINE CRANKCASE
OR TRANSMIS SION WHEN CHECKING OIL
LEVEL
OR CHANGING OIL.
4485R-23.4.73
- 9 -
transaxle {transmission) '
lubrication
FIG. 17
Rear wheel is removed for illustrating.
1. Check oi I in tronsoxle every 50 hours of operation.
To check oil level, remove filler plug from trans -
axle. Oil level should be even with this plug.
2. Change oil in tronsoxle after 500 hours of op-
eration. To drain, r emove drain plug and catch
oil in suitable contain er.
3. To fill tronsoxle, use 5 qts. of Allstate S.A.E. \
30 motor oil for service MM or MS or equivalent. t'
F ill t hrou gh filler plug as shown.
~~
BEFORE
B. ACKING __ _
· ~
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lubr i cation
chart
------
...
'\
8 8
F
FIG. 18
There ar e only 6 grease fitt i ngs on your tractor. Gi ve eac h grease fitt i ng 2 shots of grease every 5 hours of operation.
Use h1g h performance extreme pr essure lu DrTCa"ti ng grease Amdex No. 1. Th is may be obtained by ordering part number
2557R from your local Sears store or Catalog outlet.
A - Fr ont Wheels (2 fitt ings, both sides}
B - Front Spindles {2 fittings , both sides )
C -
Steer ing Be ll Cran k
D - Steer ing Gear Sector and Arm
E - Chec k oil in eng i ne crankcase at least every 8 hours of operat ion. Change oil every 25 hours of normal operat ion.
In extremely di rty or dusty conditions, change oil every 15 hours of operation .
F -
Che ck oil in transaxle (transmission} every 50 hours of op e ration. Change oil in transaxle every 500 hours of op·
eration.
Apply sever al drops of o il to al l pivot po i nts every 5 hou rs of operat ion.
4485R - 18 . 6.73
• 10 •
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r
transaxle
(transmission) drive belt adiustment
A new belt will stretch after the first few hours of operat i on, then after ini tial stretch, ad j ustm e nt is seldom neces -
sary.
7 1 /2"
~TOP OF FRAME
FI G. 19
1. Loo sen bolt in flat i dler and frame, and push id l er and bolt down in slo t of frame unt il center of id lerpu lleyon
idler brocket (just beck of engine), is ?12 in ches above frame as shown. Tighten bolt in fl at id ler and frame securely .
NOTE: Foot pedal should be in vertical or just back of vertica l pos i tion with clutch engaged. New belts w ill
stretch after o few hours of operation, then after initi al stretch, adjustment is seldom necessary. Adjust
belt <lfter first 10 hours of operation.
1
FOOT PEDAL
TOP OF FRAME
FIG. 20
To ad j ust broke, loosen nu t back of tu r nbu ck le and t urn turnb uckle ( clockwise when standin g in fr ont of tractor ), one
turn at a time until foot pedal has about 4 inches of travel from c l utch engaged to full broke pos i tion, or centerof
i dler is abo ut 5 3 '8 inches above frame os shown .
Tab on idler brocket will deflect belt slightly . T ig ht en jam nut against turnbuckl e to loc k turnbuckl e in pos ition . Keep
broke properly adjusted especially in hilly te rrain.
park brake lock adiustment
To t ighten parking broke loose n hex nu ts (A and B). Rotate parking lock l ever to l ock position . By hand press foot
peda l forward to full broke pos iti on . While holding broke pedal f orward tighten nut (B), agai nst bushing (C), f in g er
tight. Relea se foot pedal, and turn nut (B), bock against bushing (C), two additional tu rn s. T i ghte n n ut (A), again st
nut ( 8), to loc k in posit i on. Place high -l ow leve r in neu t ral pos ition . Pull parking lock l ever back ( lo ck ) posit i on.
R ea r wheels of tractor shou ld s li de when tra ctor is pushe d.
4485 R-2 3 .4.73
- 11 -
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carburetor adiustment
CAUTION: WHEN FOLLOWING STEPS 1 THRU
5 BELOW, USE EXTREME CARE TO AVOID
CONTACT WITH MUFFLER, HEAT SHIELD
OR MOVING PARTS TO PREVENT INJURY .
ALSO , BELT GUARD MUST BE IN PLACE.
MAIN FUt:L AND IDLE VALVE ADJUSTMENT
LOW SPEED SET
ON GOVERNOR
LINKAGE · SMALL
GAP HERE AT NO
LOAD
MAIN FUEL
(HIGH SPEED)
ADJUSTMENT
THROTTLE IDLE
STOP ADJUSTMENT
SCREW
SIDE VIEW
FIG. 21
INITIAL ADJUSTMENT :
REAR VIEW
The carburetor has o main fuel valve adjusting screw
and an idle valve adjust in g screw. (F i g. 21), A low
speed adjustment screw is shown in ( Fig. 22 ).
1. Turn main fuel valve clockwise until it just
closes.
CAUT ION: Valves may be damaged by turning then
in too far.
2. Now open main fuel valve 1 turn counterclockwise.
3. Close idle valve in some manner and open it
5/ 8 turn (coun terclockwise).
4. Th is initial adjustment will permit engine to start
and warm up prior to final adjustment.
FINAL ADJUSTMENT
1. Turn main fuel valve in unti I engine misses · (lean
mixture), than turn it out rest the point wliere en·
9ine runs smoothly unti engine runs unevenly
(rich mixture). Turn valve to mid-point between
lean and rich so engine runs smoothly.
2. Hold engine at idle position and set low speed
adjustment screw (Fig. 22) until a fast idle is
obtained (1200 rpm).
3. Hold throttle in idle position and turn idle adjust ·
ment valve in (lean) and out (r ich) until engine
idles smoothly.
4. Reset low speed adjustment screw so engine
idles at 1200 rpm.
5. Release throttle-engine should accelerate without
hes it at ion . If engine does not accelerate properly,
readjust main fuel valve by turning out slightly.
IMPORT ANT: Do not ope n more than Y2 turn be-
yond maximum power point.
LO W SPE ED ADJUSTMENT
o(§})==-==-q. ~~~
--
-SET LOW SPEED ADJUSTMENT
4485R-18.6.73
SO EN GI NE RUNS AT 1200 RPM
IN "SLOW" POSI TION .
~
FIG. 22
spark
FIG . 23
SPARK PLUG GAP
0.02 5" GASOLINE
SPARK PLUGS: Check, clean and reset spark plugs
every 100 operating hours. Replace spark plugs that
show signs of fouling or electrode erosion.
points (~~fd>
o'l
BREAKER POINTS: Check, clean and reset breaker
points every 200 operating hours. Replace points if
they are pitted or burned. Set point gap to .025 cold
when fully open.
tires
Keep tires in f la ted to 12 pounds of air pressure in
f ront; 12 pounds in rear.
Avo id stumps, stones, deep ruts and other hazards.
Cuts in tires should be repaired immed iately as
neglect decreases the tire life. Keep tires free
from oil and grease as both destroy rubber. Af ter
using the Tractor for spraying -- insect control work-·
wash off any chemicals that be on the tires.
G--t-"1-'---..1.11/ II
To remove a front tire and wheel, proceed as fol-
lows:
1. Block up Tractor rocker bar ( front axle ) secure ly
or use a Sears T rae tor Joe k.
2. Remove hex bo It (A), and dust cap (B ).
3. Remove gripco nut (C ), wear washer (0), pin
( E), and washer (F), from spindle shaft as-
sembly (G).
4. After tire is repaired, reverse above procedure
for reassembly.
A rear wheel and tire is removed by removing the
five hub bolts from wheel and hub. FIRST: Block
up rear ax le securely or use a Sears Tractor Jac k.
Sears
or your local service station can repair your
Tractor tire in the same manner as an automobi le
. 12 . tire.
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"; - --
trouble shooting
POSSIBLE CAUSE
WILL NOT START
Dead battery
Attachment clutch lever engaged ......................... .
Gear shift lever in gear ................. ... ............... ..
No gC~soline in fuel tonk or carburetor
POSSIBLE REMEDY
Recharge or replace batte r y.
Move to "out" position.
Shift into neutral posit ion.
Fill the tank with gasoline; open fuel shut-off valve.
Check fuel I ine and carburetor.
HARD TO START
Water in gasoline or old fuel
Choked improperly. Flooded engine .................... .
Dirty
air cleaner ..... ...... . ......... . ....................... .
Spark plug
dirty or improper gop .. ... •.............•..• ..
Defective battery ...... . ........ .. ..............•... .. ...•....
Defective ignition or loose wiring
Drain fuel tonk and carburetor. Use new fuel and dry
spa rk plug.
Push in choke, open throttle control and crank en-
gine several times to clear out the gas.
Remove and c lean , refer to page 8.
Clean, adjust the gap or replace. Refer to page 12.
Repl ace.
Check the wiring and spark plug.
ENGINE MISSES OR LACKS POWER
Di rty starter air screen
Partially plugged air cleaner •. . ............ .• ..•. .. .. . .....
Low oil level or dirty oil .••............................... .
Improper carburetor adjustment ...•........................ .
Spark plug
dirty, wrong gap or wrong type ...... . .... .
En gine overloaded ...... . .......... . .... ........... .... . ...... .
Faulty ignition
Oil in gasoline ............ .. ...........•.. ....................
Poor compression
Cl ean screen over starter, see page 8. Be sure fins
on cyl i nder head and around cylinder are clean.
Rem ove and clean, refer to page 8.
Check or change oil, see page 9.
Refer to page 12.
Clean, reset the gop or replace.
Shift to a l ower g.eor or reduce load.
Check spark plug and for loose wires. If trouble
cannot be corrected, contact Sears.
Drain and refill gbsoline tank and ca rburetor. Oil
reduces the efficiency of the engine.
Contact Sears.
ENGINE OVERHEATS
Dirty starter air sc ree n
Low
oil level or dirty oil . ...... ...... ........ . .......... .
Pa rt ially plugged muffler ..... . .. . •.... . ............... . ...
Poor fuel or too leon a mixtu re ............ ............ .
Partially plugged air cleaner ............................ .
Dirty
engine
NO LIGHT S
No head lig hts or toil li ght with light swi tch knob
pu ll ed out ... .. ...................................... .... . ....... .
4485R-23 .4.73 - 13 -
Clean screen over starter, see page 8.
Che ck or change oil, see page 9.
Remove m uffler froro engine and clean.
Refer to page 12.
Remove
and clean, refer to page 8.
Clean fins on cylinder head and around cylinder.
Turn fuse holder on dashboard counterclockwise-
check for burned out fuse.
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how to start if battery
is low
1. Connect quick-start battery cab l es or "j umpers"
from your automobile 12 vo lt battery to the Tra c-
tor battery CAUTION: Connect pos 1t1ve (+ )
terminal to positve (+ ) terminal. This method of
st.arting is only a m ean s of emergency starting.
Have Tractor battery recharged or replaced im -
mediately.
important battery care
Proper attention to the battery is of utmost im-
portance.
The following points ore recorded to help remind
you
to provide attention to the battery and gain full
advantage of the usable life built into the battery
and avoid costly replacement.
1. Check solution level in battery at least once
each week. Add distilled water when required.
Correct level is bottom of tubes in cells, refer
to page 4. After adding water, run th e engine so
that the gene r ato r charge w iII mix the solution.
DO NOT OVERFILL. Ac id spilled from the
battery wi II co rro de choke control and throttle
control casing and wire, Tra ctor paint, etc.
2. Keep the battery clean and dry at all times.
Remove any collect ion of grease, corrosion or
other substance from the battery .
3. Ke ep battery snug in its holder.
4. Keep vent caps tight and small vent holes in
caps open.
5. If battery should become discharged or falls
below a specific gravity of 1.225, remove battery
and have it recharged.
6. When r echarging, request service station to
SLOW CHARGE the battery at a rate of 3 amperes.
FAST CHARGING IS NOT RECOMMENDED.
winter care--battery
l. If Tractor is not used regularly during winter
months, the batte ry should be removed and
stored in a coo l, dry place abov e 50° F.
2. Battery should not be placed di re ctly on cement
as this will drain the battery.
3. If Tracto r is used only infrequently during winter
months, check battery at least once ea ch thirty
days to be sure a full cha r ge is maintained.
4. A battery not fully cha rged can freeze, result ing
in the necessity to repla c e.
5. A safe rule is to charge the battery monthly or
at least test and recharge if below 1.225 s pe ci fic
gravity.
6. Recharge to bring the specific gravity to normal
before rep la cing it in the Tractor after storage.
Please re member the necessity of prope r winter care
for the batte ry. Batte r ies not in- use for several
months and not kept fully charged, produce a sul-
phation of the plates which cannot be re moved by
recharging.
4485R-23.4 .73
• 14 •
storage instructions
In the event your Tractor is to be inope rat ive for
periods in excess of 30 days - prepare for storag e as
outlined in the next column.
l. Drain fuel tonk and car buretor by allowing t he
engine to run out of gasoline. Gasoline left in
your
engine will l ea ve gum deposits and con -
densation in the carbur etor and fuel tank. Th is
makes fuel system inop erat ive and will result
in hard or non- sta r ting of the engine.
2. Lubricate cylinders by removing the spar k plugs.
Pour one ounce of c l ean lubricating oi I through
each spark plug hole into the cylinders. Crank
the engin e slowly to spread oil and replace the
sp ark plugs.
3. Clean the eng ine and Tractor :lf all foreign matter .
4. Do not sav e or store gasoline over winter.
STORE YOU R TRACTOR IN A DRY AND PRO-
TECTED PLACE . L EAVING YOUR TRACTOR
OUTDOORS, E XPOS ED TO THE ELEMENTS ,
WILL RESULT IN MATERIALLY SHORTENING
ITS LIFE.
general
1. Just as your automobile needs professional
mechen ical maintenanc e from time to time, so
does your air cooled engine. Cleaning and
adjustment of the carburetor and periodic
replacem ent of t he spark plug and ignit ion
points is made necessary by NORMAL use.
2. Professional air cooled eng ine service is as
close as your nearest Sears Store.
3. A yearly check-up or tune - up by Sears is a good
idea to avoid breakdowns or delays .
Sears, Roebuck and Co. or Simpsons - Sears Ltd. in
Canada reser ves the right to make any changes in
des i gn or improv ements without imposing any ob-
ligat i on to in stall the same upon its i tem s heretofore
'Tianufactu red.
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r
•
•
f 8 pa I r p a f fS SS / 16 TRACTOR--MODEL NUMBER 917.25751
a:»
84
4485R-30.5.73
F G H
'ff CD 'H
~
81
-15 -
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_,
• partsrepa1r
SS , 16 TR AC T QR ,- MQDE L NUMB ER 917.25751
KEY
PART DESCRIPTION KEY
PART DESCRIPTION
NO.
NO. NO. NO.
1 634A551 Hood Assembly
57
634A355
Hanger Weldment L.H. Front
2
3624R Decal- Hood Strip
58
2702R
Shift Pattern Plate
3
3300R
Deco 1-Sears
59
9521H
Drive Rivet
4
20 1 7R
Decal (Maintenance Minder)
60
2703R Model Plate
5
634A549
Muffler Guard Assembly
61
634A 101
Drawbar & Weldnuts
6
3531R
J-Ciip 62
SOOP Hex Nut 7/16-14
7
2695R Muffler
63
lOOlP Lockwasher 7/16
8
504P
Hex Nut 5/16-18 64
6635H
F lat Idler
9 582R Clamp·l 3;8 (Includes #8 & 10)
65
1520P
Washer .469 I.D. x 1 1;8 X
10
3012P
Hex Bolt 5/16-18 x 1 ~
11 Ga.
11
3494R
Heat Shield-Carburetor
66
6479H1
Belt Guide Finger
12 2697R Exhaust Manifold-Front
67
1518P
Washer 15/.32xll/16x l6Ga .
13 2696R Exhaust Manifold-Rear
68
3262P Hex Bolt 7/16-14 x 2 Y2
14 1998R Clip- Da shboar d
69
5501P
Pan Hd. Phillips Thread Cutting
15 634A605 Dashboard wltlips (Includes
Screw #10-24 x 3;8 Type T
Item #14 Does Not Include 70 2249R
Safety Switch
Item #19)
71
1003P
5/16 Lockwasher
16 2683R Ignition Switch (Includes
72
634A492
Switch Bracket As sy
Item # 17) '
73
634A491
Belt Lightener Arm &
17
7552H Key Set Idler Shaft
18
2682R
Remote Control-Throttle
74
5999H
Spring Washer
19 2680R
Dashboard Panel
75
1689E
Bushing
20
2754R Choke Control
76
634A494
Hanger Weldment-R.H. Front
21 2686R Battery Tray
77
4379H
Handle Grip
22
1513P
Washer 13/.32x13!16xl6Ga.
78
634A493
Blade Clutch Handle Assy
23
2671 R Bracket-Battery
Support L.H. 79 511P
Nylock Nut 3;8-24
24
1545P Washer 17/.32 x 1 x 16 Ga.
80
3013P
Hex Bolt 5/16-18 x 1Y2
25
2689R Bearing
81
1002P Lockwasher ~
26
634A523
Battery S~ort & Id l er
82
1506P
Washer 9/.32 x 5!8 x 16 Go.
Support w eorings
83
1004P
Lockwosher 3;8
26A 4104R Battery Heat Shield
84
501P
Hex Nut 3!S-16
27
634A508 Engine 16 H.P. (Twin Cyl)
85
1605H
Locknut ~-2 0
Model BF-MS2379B
86
1006P
Lockwasher #1 0
27A 4394R Grill Brace
87
505P
Hex Mach. Screw Nut
28
9396E Sq. Key~ x 2 # 10-24
29
634A104
Engine Pulley w!Set Screws
88
1003P
Lockwosher 5/16
30 634A527 Belt Guide Weldment
89
5394H
Locknut 3!8- 16
31
8704H1 Spacer
90
1001 p Lockwasher 7/16
32 9011H Be lt Retainer A 503P
Hex Nut ~ - 20
33
4939M Retainer Spring
B
3027P
Hex Bolt 3!8-16 x 1Y2
34 347H Huglock Nut ~-20
c
3023P Hex Bolt 3A3- 16 x 1
35 8238H
Split Spacer
D
3008P Hex Bo It 5/16-18 x Y2
36
634A390 Belt Guide Weldment
E
3075P
Slotted Truss Hd. Mach.
37
3154P Slotted F iII ister Hd . Mach.
Screw ~ - 20 x 3A3
Screw ~- 20 x 2~
F
5554P
Phillips Pan Hd. Thrd.
38
2672R Gri II Screen-Upper
Cutting Screw # 10-16 x Y2
39 2676R Gri 11-Upper
G
503P
Hex Nut ~ -20
40 3652R
Decal-Grill Top (SS/16)
H
5564P
Phillips Pan Hd. Thrd.
41 3653R
Deca l-Grill (Twin) Cutting
Screw # 10-24 x Y2
42
2678R Gri II Side
J
3267P
Hex Bolt ~-20 x 1 Y2 H.T.
42A
4171 R lnsu
Ia ted Clip K 3122P
Slotted Truss Hd. Mach.
43
2673R Gri II Screen-R.H.
Screw #10-24 x 3;8
44
2677R Gri 11-Lower L
505P
Hex Mach . Screw Nut #10-24
45 3747R
GriII Cable M 3010P
Hex Bolt 5/16-18 x ~
46
2794R Gri II Screen-Center N 3159P
Hex Bolt 5/16-18 x 7;8
47
2674R Gri II Screen-L.H. 0 17P
Carriage Bo lt 5/16-18 x 1
48
634A28 Front Channel Cover & p
3025P Hex Bolt 3!S-16 x 1 ~
Weld Bolts Q
3022P
Hex Bolt 3;8-16 x 7;8
49 6485H
Hinge R SOlP Hex Nut 3!S-16
50
2752R Front Channel Cover
s
3023P
Hex Bolt 3;8-16 x 1
Support
T
5557P
Hex Washer Hd. Thrd. Cut-
51 2665R
Gri II Spacer ting Screw ~ -20 x Y2 Type 1
52
634A531 Engine Mount Assy. u
3025P
Hex Bolt 3!8-16 x 1~
53
634A 5 43 Chassis Assy wA3earings
v
4514P
Hex Socket Hdless Set
54 2655R Cover R.H.
Screw 5/16-18 x 5;8
55
634A5 18
Id l er Bracket Weldment
w
28P
Carriage Bolt 3;8-16 x 1
56 2670R
Bracket-Battery Support R.H.
X
3021P
Hex Bolt 3;8-16 x ~
y
3035P Hex Bolt 7/16-14 x 1~
z
53P
Carriage Bolt # 10-24 x Y2
4485R -30.5.73 -
16 -
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repair parts
4485R-18.6.7 3
13--
5""
LNUMBER 917.25751
SS / 16 TRACTOR -- MODE
I
8--------- @ \
17 /
/
A
27
• 17 .
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repair parts
4485R - 18 .6.73
KEY
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
A
SS / 16 TRACTOR -- MODEL NUMBER 917.25751
PART
NO.
1528P
1309H
634A521
4764H
5000P
634A277
9040H
511 p
1505P
6855M
2699R '
634A278
1808R
1552P
634A98
9318H
6842M
634A95
2169R
795R
2892R
1562P
8785H
4831H
8763H
3008P
8798H
6856M
2557R
DESCRIPTION
Washer 13/16 x 11;.1 x 14 Ga.
Bearing
Front Axle with Bearings
(Inc. Key No. 2)
Huglock Nut 5/8 - 11 UNC
E-Ring
Spindle Cornplete-R. H.
Flanged Bearing
Nylock Nut, 3/8-24 UNF
Washer 9/ 32 x Y2 x 14 Ga.
Grease Fitting
Hex Bolt
Spindle Complete-L.H.
Tie Rod and Joints
Washer 49/64 x 11;.1 x 16 Ga.
Steering Bell Crank Weldment
Drag Link and Joints
Grease Fitting
Steering
Gear Sector and Arm
Front Tire-Tubeless
Tire Valve
Front Wheel
Washer 25/ 32 x lY2 x 16 Ga.
Wear Washer
Elastic Nut %- 16 UNF
Dust Cap-Outer
Hex Bolt 5/16-18 x Y2
Roll Pin 5 /32 x 1
Grease Fitting 14 -28 Taper Thread
Amdex No. 1 E.P. Grease (Not
furnished with your Tractor)
- 18 .
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•
repa1r parts
SS / 16 T RAC TO R--MOD EL NUMBER 917.25751
47--- ~
/ CJ - N
48
46
4485R-23.4. 73
• 19 -
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