Sears 917.253120 Quick reference guide

. ..
8920H
3.11.62'
ASSEMBLY, OPERATING INSTRUCTIONS
AND PARTS LIST FOR
SEARS
SICKLE BAR MOWER
MODEL NUMBER 917.253120
ISears J
SEARS, ROEBUCK AND CO.--U.S.A.; ·
SIMPSONS-SEARS LIMITED-CANADA ·
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SAFETY PRECAUTIONS
1. Place tractor sh i ft l ever in neutral and mower clutch lever in rear or disengaged position before starting engine .
2. Never start the engine when anyone is near, and never ploc e hands or feet near cutter bar.
3. Never refuel engine while it is in a bui l ding, and always when refuel ing engine be careful that fuel con does not
touch battery. A spark from the fuel con touching the battery terminal could cause a fire.
4. Do not store equipment with fuel in the tonk ins i de a bui lding where fumes may reach on open flame or spark. Let
eng i ne cool before storing in any enclosure.
5. Never fill the fuel tonk while the engine is hot, and wipe off any gasoline that might hove been spilled. Replace
fuel con on tonk.
6. Only persons thoroughly acquainted with the rules of safe operation should be permitted to use mower, and no minor
should operate this machine unless properly supervised.
7. Do not attempt to get off or on tractor when mower is engaged and tractor engine is running. Wait until knife stops
before getting off tractor . Be sure broke is on securely and shift transmission into low or reverse g ea r, especially
on on incline or hill.
8. Always keep broke properly adjusted.
9. Keep knife sharp.
10. If your equipment should start vibrating, stop the engine and check for damage or loose ports. Vi brat ion is generally
o warning of trouble. Always replace ports showing excessive wear.
11. Always replace thrust washer and lock nut when replacing knife, and check lock nut at frequent intervals to make
su re it is tight.
12. Wear relatively tight fitting clothing, and always keep hands, feet or lo ose fitting clothing away from mowing belts.
13. Do not mow crossways on steep slopes because of danger of tra ctor tipping over.
14 . Do not attempt to clean cutter bar, or to otherwise clean , adjust, or repair machine before stopping tractor engin e
and mower
clutch lever is in disengaged position.
15. Never leave machine running unattended , and remove key from ignition switch to prevent children from starting
tractor or mower.
16, Always keep all shie l ds and guards in place. Mower or tractor must never be ope rated with any shields or guards
removed.
17. Never run engine inside a building.
18. Remove stones, wires, cans, boards, branches, bones and other foreign objects from area before each mowing. Avoid
striking rocks or roots. Any of the above, if struck by the knife, may damage knife or guards and may cause injury
to people or property.
19. Keep people, pets and particularly children away from mowing area when mowing with your sickle bar mower.
20. Always drive olowly over uneven ground, on hills and curves to prevent tipping of tractor.
21. Do not operate the tractor in high gear going down hill, and do not turn sharp corners while going down hi II. If it is
necessary to stop tractor while going down hill, do so quickly to prevent tractor from picking up speed during the
declutching to braking operation. NOTE: The enginP. produces cons iderable braking action when throttled bock to
idling speed without declutching , and this procedure is recommended before applying brake.
22. Do not shift gears while going up steep hills. Choose a low enough gear to climb hill without slopping and shifting
gears. If it is necessary to stop while going up hill, do so qui ck ly to prevent tractor rolling backward. When start-
ing tractor in motion going uphi II, use one of the lowest gears, reduce engine speed and engage clutch gradually to
prevent tractor from "rearing up".
YOU CAN DO MANY JOBS EASILY
WITH THE WIDE VARIETY OF ATTACH-
MENTS -- AND FIRST OF ALL BE
CAREFUL.
2.3.69
-2-
ONLY ONE PER SON ON THE
TRACTOR AT A Tl ME.
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.•
INTRODUCTION
Setting Up, Operating Instructions and Safety
Precautions should be studied very closely before
beginning to assemble your mower. A number at the
beginning of a paragraph in the following instructions
refers to an arrow in the adjoining figure, except
when otherwise stated. When R.H. (Right Hand) and
L.H. (Left Hand) are used, it shou ld be understood
to mean from a position behind and facing the mower
(or
direction of travel).
Cut all wires.
NOTE: The two ext ra thick flat washers found in bog
of
ports must be saved for use in Step 14, page 5.
•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••
BEFORE MOWING A NEW PLOT OF GRASS,
ALWAYS STOP TO ANALYZE THE LAWN
OR FIELD FOR BEST MOWING PROCEDURE.
CONSIDER ALSO THE HEIGHT OF GRASS,
WEEDS, HAY, ETC. TO BE MOWED, TYPE
OF TERRAIN (LEVEL, HILLY OR PITTED),
AS WELL AS THE PRESENCE OF ROCK OR
TRASH. EACH CONDITION WILL REQUIRE
CERTAIN ADJUSTMENTS OR PRECAUTIONS
AS OUTLINED IN THIS MANUAL.
•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••
SETTING UP INSTRUCTIONS
FIG. 1
1. Raise front channel cover and assemble idler
shaft (A), to front of tractor frame, and hook
spring into hole in rear of front axle brocket and
hole in front of idler frame as show n in Fig. 1.
2.3.69
-3-
FIG. 2
2. Assemble belt tightener lever ( B), to R.H. side of
tractor os shown . NOTE: Bolt (C), must be
removed from tractor to install lever. Use one
3A3 x 1~ inch bolt, lock washer and nut found
in plastic bog, for attaching lever. Use original
bolt (C), removed for attaching other end of lever.
3. Assemble belt tight ener link (D), and adjusting
pin to belt tightener lever (B), and secure with
spring retainer as shown in Fig. 2.
F
R.H. SIDE L.H . SIDE
FIG. 3
4. Slide mower mounting frame beneath tractor as
shown above. Line up hole in frame (E), with hole
rear hanger (F). Slide hanger shaft (G), with roll
pin attached, through holes in frame (E), and
rear hanger (F), from L.H. side.
NOTE : Place a cushion washer (H), -- ~hipped
in bag of ports, over shaft (G), and between frame
(E), and rear hanger (F), at both R.H. and L.H .
sides of tractor. Secure R.H. side with retainer
spring (1), shipped in bog of ports .
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SETTING UP INSTRUCTI ONS -- CO NTINUED
FIG. 4
5. Loosen nu t s (J), in front fr ame strop we ldme nt
(K), and frame weldment as shown in Fig. 4.
Raise frame strop weldment up so that it con be
attached to L.H. front axle brocket (L). Ass emble
flat washer over bolt, then odd bushing . Insert
bolt, washer an d bush in g through front frame strop
then through L.H. front axle brocket as shown
in Fig. 4, and assemble · lock washer and hex nut .
Leave nut loose.
>I'
NOTE: It may be necessary to slide frame strop
weldment forward or backward on frame so that
hanger shaft con be inserted through bra c kets.
Retighten nuts (J), loosened in step 5 ab o ve, and
ol so boIt through front frame st r op and frame
weldmen t lef t loose in step 5 above.
FIG. 5
6. S lide cutter bar and mounting br ocket weldment
(M) , into position shown in Fig. 5, ben e ath yoke
weldment (N). Pins of mounti ng brocke t weldme nt
enter ho l es in yoke weldmen t. Secure with t he
two cot! er pins shipped in bog of por ts . Sp read
cotters.
2.3.69
-4-
FIG. 6
7. Refer to Fi g's. 5 and 6. Remo ve nut loc kw oshe r,
bushing, flat washer and bo lt from 1 lift link (P ).
Assemble lift link (P) , to c utter bar li ft ar m {Q),
with items previously removed.
8. Remove huglock nut and outer wash er from pin
welded to knife head ( R). Leave inner washer on
pi_ n. P_ osit i on end of pitman ass embly (S), over pin
•• It wdl be necessary to hove knife assembly in
extreme R.H. position . Now slide outer washer
previously removed, over pin and secure with
huglock nut.
9. Remove cotter pin (T), from rivet (U), and remove
rivet. Attach clevis to foot lift lever as shown in
Fig . 6 with rivet and secure with c otter pin .
X
FIG. 7 w
10. Secure swothboord with plate (W) , attached to
outer runner plate (X), with a 3/8 x 1 square
neck carriage bolt , 3/ 8 lockwosh er and Gripco
lock nut . Bolt, lo ckwosher and nut shipped in
bog of ports .
NOTE: T i ghten Gripco lock nut aga in st lockwosher
tight e~ough to pr event rottl ing but loo:.e enough
to perm1t swothboord to move freely up end down.
11. Attach swothstic k (Y), to swo thb oord ( W) , with a
3/ 8 x 1
squa re neck carria ge bol t, fla t washer
7/16 x 1, lockwo sher 3/8 and h ex nut. Bolt
washers and nut shipped in bog of port s. '
NOTE : There ore three Io cot ion s in t he swothboord
for the swothstick. Fo r your prope r ap plic a tio n
refer to "Swot h stick Adj us tme nt " .
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~
~-111
' \
{:;; FLAT IDLER PULLEY
()
FIG. 8
12. Remove nut, lockwosher and belt guard (B), from
front i
dler shaft ( A). Place belt on idler sheaves
and on engine pulley as shown. Replace belt
guard {B) and secure with lockwasher and hex
nut. Important: Mower belt wi II be second groove
from engine of engine pulley . See ins ert for
proper way of instal ling belts on idle r pu lle ys.
Back of belt must be against the flat idler as
shown. Refer to Fig. 8.
13. Refer to F i g. 8. Assemble ad jus ting pin (C) to
idler shaft {A), and secure with re tain er spring
(D), as shown. Adjust for proper belt tensio n,
see Belt Adjustment, page 6, Fig. 12.
If your traG tor is equipped with a new style
belt guard (E, Fig . 8-A), disregard step 14
below and follow step 15.
l4. Refer to Fig. 8. Remove bolt (F), from upper
belt guide {G), at engine pulley. Assemb le belt
guide {H ), over short belt guide (G), with washer
betw ee n belt gui des. S ec ure with 3/ 8 x 1)4 hex
bolt and extra th ick washer f urnished. Note:
extra thick washer nex t to head of b~lt, new belt
guide, washer, and short belt guide next to
engine.
Remove bolt (J), from lower be lt gui de (K), and
assemb le other belt guide (L), to en gi ne as
shown. Assemble lower b elt guide over was he r
and
existing belt gui de in some manner as stated
above. All belt gu ides must clear belt by l/8"
when clutches ore engaged (b elts ti ),
~
2.3.69
1 5. When mounting this mower on a tra ctor equipped
with a belt guard weldment (F ig. 8-A), over the
engine pul ley, t he belt gu ide s (J, F ig. 8), will not
be on the tractor . AI so, the ot he r belt guide (L,
Fig. 8), wil l n ot be used. Assemble bolts (M),
bushings (N), and nu ts (P), sh ipped in plastic bag
with your mower, to the two lo wer holes in belt
guard weldment. This acts as a belt guide.
Discord belt guides, bo lt s and washers shown in
Fig . 8 which was furn ished with the mower.
LUBRICATION CHART
Use a good grade of gun grease, and lubricate mower
as per lube chart below. Give grease fittings,
illustrations 1 and 2 (front and rear guides), two shots
of grease. The remaining grease fittings wi II require
only one shot of grease each. See Fig. 9. Lubricate
wear plates and knife clips with S.A.E. 30 motor oil
or grease, These should be lubricated every hour or
two
of steady operation. However , when mowi ng in
sandy or gritty conditions, it may be better to leav e
the knife run dry. The grease or oil wi II hold the sa nd
or grit in place, and wi II oct as a grinding compound.
l. Rear guide " 2 shots grea se every hour or two.
2. Front guide • 2 shots grease every hour or two,
3. Knife clips a~d wear plates- A few drops of SAE
30 motor oiI or a dab of grease at wearing su rfa ces
every hour or two of operation. In sandy or gritty
conditions, do not l ubricate .
4. Flywheel bearing tube • 1 sho t grease every 10
hou rs of opera ti on .
5. Pi tm an tube - grease unt il grease appears at
spherica l rod ends, every hour or two.
Lubricate all pi vot points and li nkages with a few
drops of SA E 30 motor oi I eve ry 5 hours of operation.
NOTE: W ip e grease f ittings clean before lubricating.
This ovoids forcing dirt into the fittings with new
greas e.
IMPORTANT:
LUBRICATE
OPERATION .
DO
MOWER
NOT ATTEMPT TO
WHILE MOWER IS IN
~
FIG. 8-A
- 5-
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OPERATING INSTRUCTIONS
For each job of mowing it wi II be necessary to vary
the ground trav e l speed with each plot to be mowed.
In thin stan ds of material the ground travel speeds
may be inc reased (shift to a higher gear) and in most
cases, the engine may ol so be throttled bock. In
heavy blue grass it may be necessary to shift to a
lower
gear (slower ground trave l speed) and run
engine at o higher speed. Pick gear and engine speed
which seems to do the best job of mowing. Always
run engine throttle ot slower spee ds if possible to
reduce wear and vibration.
DO NOT ATTEMPT TO LUBRICATE WHILE
MOWER IS IN OPERATION.
CAUTION: Run engine at reduced speed whenever
possible to reduce vibration and wear on pitman and
knife. Operating angle of cutter bar not to exceed 35°
above level.
It is the respon s ibi Iity of the operator to see that the
area where the sickle bar will be used is free of all
types of foreign material. This includes wire, rope,
sti cks, cons , bottles, pipe, rocks, e tc. These
represent potentia l dangers to the sickle bar and
operator, and ore certain to damage the knife
assemble. Always be on the alert for obstacles when
mowing, and never leave the sickle bar in operation
while unattended.
NOTE: Sickle bar must be in operation before begin·
ning to move through material to be cut.
TO TRANSPORT
FIG. 10
Stop tractor engine. Depress on foot lift lever (A)
until latch brocket (B) con be positioned as shown in
Fig. 10. Secure bar in upright position with tra nsport
strop (C).
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SWATHSTICK ADJUSTMENT
FIG. 11
There are three hol es in swothboord for swa thstick
adjustment. Adjust to best turn crop being cut . Lower
hole for higher weeds.
BELT ADJUSTMENT
--- ......
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.,
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FIG. 12
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I
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I
Turning the adjusting pin (A, Fig. 12), adjusts the
belt. Remove retainer spring (D, Fig. 8), and turn
adjusting pin (A, Fig. 12), in o counter-clockwise
directi on (when standing in front of the tractor),
to tighten belt. Belt tightener lever (B, Fig. 2},
requires a fair amount of effort to engage lever
(pu sh forward), when belt is properly adjusted. Belts
that slip wear out rapidly. Keep belt properly adjusted
to prevent premature failure . Replace retainer spring
in adjusting pin.
STORAGE
Before storing mower for any long period of t ime,
thoroughly clean away al l dirt and debris. Wearing
surfa ces should be given o good coot of grease or
rust preventive espec i ally the mower knife. Store in a
clean , dry area.
·.
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•
MAINTENANCE AND SERVICE INSTRUCTIONS
DAILY MAINTENANCE
Ma ke sure a ll nu ts on bol ts ore ti g ht and co tter pins spre ad. Keep k ni fe sh arp and t rue. Obse rve all safety pr ecau t ion s.
Keep mow er l ubric ate d.
TO REMOVE KNIFE
1. Pos ition knife in the ex treme out po sit io n (knife farthest away f ro m tra ct or ).
2. Re move hug loc k nut and outer w ash er from pin welded to kni fe head. Slip p itm an from pin and pu ll co mple te knife
ossemb ly out f ro m the L.H. end of bar. Sh ar pen knife se ctio ns. Repair or str aigh ten kn i fe as needed , or rep lace
with n ew kni fe. A djust k ni fe cli ps as stated be lo w.
KNIFE
A dul l knife, im prope rly adjusted kn i fe clips , bent guards or worn wearing pla tes will abs orb o great deal of pow er and
make good cutting impo ssib l e. Make the following a dju stm e nts b ef ore ea ch day's cutti ng.
Guards ore often knocked out of Iine by st riking st ones and obstructions. Remove knif e and sight through guards.
Align led ger p lates by str ik in g thick p ortio n of gu ard with o hammer. Do not be nc;llips of gu ard s down abov e kn i fe, as
c ho king may result. Properly a djuste d knife cl ips keep the kni fe fla t upon th e ledg er plates. If the cl ips be come l oose
or bent, the po ints of t he kn if e wi ll rise when cutting and re su lts in pulling or tearing instead of o sh earing act io n.
Remove the k nif e; sight along the bock and if be nt , straighten it carefully on f loor or block by striking w it h hammer
where nece ssary . After the knife has b een straightened, ad jus t the knife c lips. Tap it with light blows of hammer unt il
the cl ip j us t begi ns to t ig h ten dow n on the knife secti on. If th e mower is used in loose abrasive soils , the steel
wear in g pl ates that support th e bo ck e dge of the kni fe s oon b ec omes w or n. The wear plate is located under t he knife
clip . W he n the plates become worn, the back edge of th e knife is n ot supported high enough. This makes it difficult to
hoi d the front of th e knife down on the guard plates. Eve n though t he k nif e cI ip s hove been set down as ou tI i ned above,
these wea r in g p lot es . are i nexpens i ve and should berep l oce d wh enev er badly worn.
PITMAN REPLACEMENT
B
FIG . 13
Tigh ten hex jam n uts ( A), and spherical rod ends (B), in pitman tub e ( C), until on equal amount of threads ore exposed
to obta in th is dimension. Sp herical rod ends must be at 90° to eac h other with zerk fitting facing to rear of mower.
Tighten hex jam nuts securely.
HOW TO ORDER REPAIR PARTS
SEARS SICKLE BAR MOWER-- MODEL NUMBER 917.253 1 20
The above number is t he Model Number of your SEARS SICKLE BAR MOWER. It wi II be found on a plat e attach ed to
the top of th e frame weldment. Always ment ion the Model Number of your mower when communicating wi th u: ; or w hen
or derin g rep air port s.
A ll ports I is ted he rein ma y be ordered thro u gh SEARS , ROEBUCK AND CO . or S IM PSONS-SEARS LI MI TED . When
ordering ports by moil from t he moil or der h ouse which serves the territory in which you li ve, selling prices will be
f
urn ished on request or ports will be s hipp ed at preva i ling prices and you will be billed accordingly.
WHEN ORDERING REP A IR PARTS, ALWAYS G IVE THE FOLLOWING IN FORMAT I ON AS SHOWN IN THIS LIST;
1. The PART NUMB E R. 3. T he MODEL NUMBER·· 917.253120.
2. The PART NAME. 4. The NAME of Implemen t ·· SI CKLE BAR MOWER.
Each p ort has been given 0 K ey le tte r or number which is used only OS a guide to find the part number. Do not use
th e Key letter or number whe n ordering repair ports.
SEA R S, RO EB UCK A ND CO . and S IMP SO N S-SEARS LIMITED reserves th e right to make any changes in design and
change s or imp rovements witho ut imposing a ny ob iigot ion to install the same up on its products heretofore manufactur ed •
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SEARS SICKLE BAR MOWER -- MODEL NUMBER 917.2531 20
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FOR NEW STYLE BELT GUARD--
REFER TO PAGE 5, FIG. 8-A
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SEARS SICKLE BAR MO WER -- MODEL NUMBER 917.253120
KEY
PART
DESCRIPTION
KEY
PART DESCRIPTI ON
NO. NO. NO. NO.
1 5309H
Cushion Washer 36 120389 *Washer, }S x 114 x 14 Go.
2 5235H1 Fr
om e Hanger Shaft 37 272232 *Hex Nut, 7/16 -14
3 5304H Elastic Stop Nut 5/8 • 18 38 131016 *Wash er, 21/32 x 1-5/16 x 13 Go.,
4 5280H
Dust Cop
Cod. Plated
5 131016 *Washer,
21/32 x 1-5/16 x 13 Go. 39 121574 *Lockwosfier 5/ 8 Cod. Plated
6 1554H Timken
Cone 40 219436 *Hex Nut, 5/ 8 -
11 Cod. Plated
7 6855M
Grease Fitting 41 131099 *Lock wo sher, 3 /8
?A
Model Number Plate
42 120377 *H ex Nut, 3/8- 16
8 634A287 Frome Weldment with Bearing
Cups
43 120214 * Lockwosher, 5 /1 6
-9 2623M Bushing 44 219431 *Hex Nut, 5/16 • 18
10 606A286 Frome Strap Front Weldment 45 120393 *Washer, 11/3 2 x 11/16 x 16 Go.
11 120388 *Washer, Flat 7/16 x 1 x 14 Ga. Cad . P lated
12 5277H Bushing 46 120388 *Washer, 7/ 16 x 1 x 14 Go.
13 528 2H
Flywheel Guard 47 120384 *
Lockwasher , Y7 Cad. Plated
14 5249H Flywheel Guard
Bracket
48 219434 *Nut
1 Hex
Y7 -13 Cad. Plated
15 606A287 Belt Guide Weldment • Flywheel 49 120390 *Wash
er, 9/ 16 x 1-3/ 8 x 12' Ga.
16
357H Huglock Nut 50 103384 *
Cotter Pin, 1/8 x %
17
19151616 Washer 15/ 32 x 1 x 12 Ga. 51 8238H
Split Sp acer
18 19211612 Washer 21/32 x 1 x 12 Go. 52 347H Hug lock Nut
19
5310H
Greas e Retainer Washer 53 132295 *Machine Screw, Slotted Fill ister Hd.
20 1553H Timk
en Cup ~~ • 20 UNC x 3 14 Plated
21 9244H
Spherical Rod End - A 4940M Retainer Spring
21A 924
2H Pitman Tube B 1572H Roll
Pin
22 634A301
Flywheel Assembly c 122333 *Bolt, Hex 7/16- 14 x 3
-
23 278H
Greas e Fitting .--.o 428691 - * Bolt, Hex 5 /8 • 11 x 2 Cad . Plated
24 7939M
Bushing E 122145 *Bolt,-Hex 3/
8- 16 x 1 14
25 124944 *Nut, Hex Jam ASF 5
/8 - 18 UNF F 120696 * Bolt , Hex 5/ 16 • 18 x 2 14 Cad. Plated
Plated
G 122007 * Bolt, Hex 5/16 • 18 x % Cad. Plated
26 606A290
Transport Stop and Rivet H 122017 * Bolt, Hex 5 /1 6- 18 x 1
27 6523H
Bushing
I 120696 * Bolt, Hex 5/ 16 -18 x 2 14
28 634A286 Foot
Lever Wel dment J 120233 * Bolt, Hex 3/8- 16 x 1
29 5234H
Clev is
L 122491 *
Bolt, Hex Y, • 13 x 3 14
30 120394 *Washer, 13/32 x 13/16 x 16 Ga. M 103384 *
Cotter Pin, 1/8 x %
31
1542U Spring N 122472 * Bolt , Hex Y7 • 13 x 2}1
32 5252H
Cutter Bar Latch
0 5297H
Drilled Rivet
33 606A278 Yoke Weldment p 456723
*Cott er Pin 3/1 6 x 1
34 5296H
Lift Link R 103408 *
Co tt er Pin 3/ 16 x 1 14
35 5237H
Pull Rod 8920H Instruction
and Parts Book
35A 32 24M
Bushing
35B 122181 *
Bolt, Hex 3/8 • 16 UNC x 2 }1 Plated
* Standard Hardware Item-·
Purchase Locally .
3.11.69
-9 -
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SEARS SICKLE BAR MOWER -- MODEL NUMBER 917.25l120
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