Owner's Manual
®
STOP
36" TOW-BEHIND
DO NOT RETURN TO STORE
For Missing Parts or Assembly
Questions Call 1-866-576-8388
UNIVERSAL TILLER
Model No. 486.252444
CAUTION:
• Safety
Before using this product, read
this manual and follow all Safety
Rules and Operating Instructions.
• Assembly
• Operation
• Maintenance
• Parts
Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A.
PRINTED IN U.S.A.
FORM NO. 49940 (04/24/08)
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SAFETY
WARNING: This cutting machine is capable of amputating hands and feet and throwing objects. Failure to
observe the following safety instructions could result in serious injury or death.
•
•
Stop engine and disconnect spark plug lead wire
before cleaning augers, removing obstacles, or
making adjustments, except for those which must
be done with the engine running.
Never place hands or feet under or into rotating
parts or concealed areas. Keep hands and feet
clearly away from auger elements, belts, pulleys,
etc. while engine is running.
Wear substantial shoes and eye protection while
using tiller.
Never attempt to make a maintenance adjustment
while engine is running, except on the carburetor.
Do not run the engine indoors; carbon monoxide
fumes are dangerous to inhale.
Never operate machine without proper guards,
plates, or other safety protective devices in place.
Disengage the Tine Clutch Lever, stop tiller and
tractor engines before getting off the tractor.
Disengage the Tine Clutch Lever and stop the tiller
engine during transportation to and from the work
area.
IMPORTANT
Warnings, Cautions, and Notes are a means of attracting
attention to important or critical information in this
manual.
Look for this symbol to point out important
safety precautions. It means-Attention!
Become Alert! Your safety is involved.
•
•
•
•
•
•
TRAINING
•
•
•
Read opening and Service instructions carefully. Be
thoroughly familiar with the controls and the proper
use of the equipment.
Never allow children to operate the machine. Do not
allow adults to operate the machine without proper
instruction.
Keep the area of operation clear of all persons,
particularly small children and pets.
MAINTENANCE AND STORAGE
PREPARATION
•
Follow maintenance instructions as outlined in this
manual and your Engine Owner's Manual supplied
with the unit.
Disconnect spark plug wire before making
maintenance adjustment or repair.
Store gasoline in an approved metal container in a
cool, dry place.
Safety and performance levels can be assured only
by the use of specified replacement parts.
•
Check the fuel and lubrication before starting the
engine. Do not fill the gasoline tank indoors when
the engine is running or while the engine is still hot.
Wipe off any spilled gasoline before starting the
engine.
Inspect the area to be tilled. Remove glass, wire,
metal objects, large sticks, and stones. Avoid
underground pipes and wiring.
Have a complete working knowledge of your tractor
and know how to handle your tractor with a tiller or
other attachment attached.
•
•
•
•
•
OPERATION
WARNING: This unit is equipped with an
internal combustion engine and should
not be used on or near any unimproved
•
•
•
Give complete and undivided attention to the job at
hand. Operate the tiller in daylight or good artificial
light.
Personal injury may result from contact with the
augers or debris thrown by this machine. Therefore,
always stay a safe distance away from the augers.
Stop the tiller engine when leaving your tiller
unattended.
forest-covered or grass-covered land
unless the engine's exhaust system is equipped with a
spark arrester meeting applicable local or state laws
(if any). If a spark arrester is used, it should be
maintained in effective working order by the operator.
In the state of California, the above law is required by
law (Section 4442 of the California Public Resources
Code). Other states may have similar laws. Federal
laws apply on Federal lands. A spark arrester for the
muffler is available through your nearest Sears
Authorized Service Center.
•
•
Check before each use for loose fasteners or parts.
Never store the equipment with gasoline in the tank
inside of a building where fumes may reach an open
flame or spark. Allow engine to cool before storing in
an enclosure.
3
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ASSEMBLY
TO REMOVE UNIT FROM
CARTON
TO INSTALL THE TILLER
GAUGE WHEELS
•
•
•
•
•
Cut from top to bottom all four corners of the carton
and lay panels flat. (See Fig. 1)
Remove the lag screw that holds the floating hitch to
the packing skid.
Disassemble and discard carton's wood top and side
supports.
Remove four hex bolt, hex nuts and flat washer from
the hold down brackets at the rear of the carton.
Remove and save the two Flat Washers and Cotter
Pins from the rear axle. Reuse when attaching gauge
wheels.
•
Assemble Gauge Wheels onto the Rear Axle with the
extended end of Hub facing inward. Secure with the
Flat Washers and Cotter Pins which you removed from
the axle during unpacking. (See fig. 2.)
•
Discard all other packing hardware and hold down
brackets.
FIG. 2
TO INSTALL THE TILLER TINE
ASSEMBLIES
•
Attach the floating hitch to the tractor's draw bar.
(Refer to Operating Instructions on page 7.)
•
Remove the preassembled 3/8" x 2" hex bolt and 3/8"
nylock nut from the L.H. Tine Assembly. Slide the tine
assembly onto the Transmission Axle on the left side
of the tiller and secure with the hex bolt and nylock
nut. (See fig. 3.) Repeat for the R.H. side.
FIG. 1
3/8" NYLOCK
NUT
•
•
Right hand (RH) and left hand (LH) are determined
from the drivers position while seated on the tractor.
We recommend that you remove the Mower Deck
before using the Tiller. Refer to your Tractor Owner's
Manual.
FIG. 3
4
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TO INSTALL (WHEEL)
WEIGHTS TO TILLER
NOTE: Weights are not furnished with the Tiller. 30 lb.
tractor wheel weights may be purchased to mount to the
Tiller if extra weight is required. (Refer to the Operation
section of this manual.)
•
Remove two Carriage Bolts and Nuts from each Tine
Shield, located approximately 3-1/2" from the front
edge. See fig. 4.
•
Place (Wheel) Weights on Tine Shield and secure
with long Bolts and Nuts furnished with the Weights.
See fig. 4.
FIG. 4
5
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OPERATION
FIG. 5
SAFETY SWITCH - prevents engine from starting while
tine clutch lever is engaged
RECOIL START HANDLE - used to start the engine
THROTTLE CONTROL - controls engine speed
FUEL SHUT OFF - shuts of fuel to engine
LIFT HANDLE - selects tilling or transport position by
moving gage wheels
TINE CLUTCH LEVER - starts and stops tine rotation
CHOKE CONTROL - used when starting a cold engine
DEPTH STAKE - controls tilling/cultivating depth
FLOATING HITCH - telescoping hitch limits shock loads
to tractor
6
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The operation of any tiller can result in foreign objects thrown into the eyes, which can
result in severe eye damage. Always wear safety glasses or eye shields before starting
your tiller and while tilling. We recommend a wide vision safety mask for over the
spectacles or standard safety glasses.
•
•
Repeat instructions in two preceding paragraphs until
engine fires. When engine starts, move choke control
gradually to RUN position.
Allow engine to warm up for a few minutes before
engaging tines.
HOW TO USEYOUR TILLER
BEFORE STARTINGYOUR TILLER
FILL THE ENGINE WITH OIL! Your tiller engine is
shipped without oil or gasoline. Add oil and gas as
instructed in the separate engine manual.
ATTACHING TILLER TO TRACTOR
(See Fig. 6)
WARNING: Never fill fuel tank indoors, or
with the engine running, or while the engine
is hot. Do not smoke while filling tank.
•
Rear wheel weights and tire chains can be used on
tractor if additional traction is required for tilling.
Place Tiller on ground level and back up tractor to it.
Slide Floating Hitch of Tiller onto the tractor drawbar
so that the hitch pin holes line up.
•
•
STOPPINGYOUR TILLER
•
Insert hitch pin until it extends through bottom of
Floating Hitch. Insert hair cotter pin into hitch pin.
TINES
•
•
Raise tiller to transport position.
Pull forward on tine clutch lever.
ENGINE (Refer to separate engine manual.)
•
•
•
Move throttle control to "STOP" position.
Turn shut off to "OFF" position.
Never use choke to stop engine.
STARTINGYOUR TILLER
(Refer to separate engine manual.)
CAUTION: The muffler and adjacent
areas are hot!
•
Check oil and gas in Tiller engine.
FIG. 6
•
•
Attach spark plug wire to spark plug.
Pull forward on tine clutch lever to disengage tines.
A safety switch prevents engine from starting while
tines are engaged.
•
•
Turn shut off to "ON" position.
Move choke lever on engine to CHOKE position.
(A warm engine may not require choking.)
Move throttle control lever on engine to FAST
position.
Grasp starter handle and pull rope out slowly until
engine reaches start of compression cycle (rope will
pull slightly harder at this point). Let the rope rewind
slowly.
BREAKING INYOUR TILLER
•
•
Break-in your belts, pulleys and the control before you
actually begin tilling.
•
Start engine with tiller attached to tractor in transport
position. Engage Tine Clutch Lever to start tine
rotation. Allow tines to rotate for five minutes.
Check tine operation and adjust if necessary. See
"TINE OPERATION CHECK" in the Service and
Adjustments section of this manual.
•
Pull rope with a rapid, continuous, full arm stroke.
Keep a firm grip on starter handle. Let rope rewind
slowly. Do not let starter handle snap back against
starter.
•
7
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8
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MAINTENANCE
Refer to the engine manual for instructions on engine maintenance.
MAINTENANCE SCHEDULE
Fill in dates as you
complete regular service.
Service Dates
Check Engine Oil Level
Change Engine Oil
X
X
X*
Service air cleaner precleaner
Service air cleaner cartridge
Replace spark plug
X**
X**
X
Clean cooling system
X**
Check valve clearance
Check for loose fasteners
X
X
Lubricate Tiller
X
X
Lubricate Tiller Transmission
*Change oil every 25 hours when operating the engine under heavy load or in high temperatures.
**Clean more often under dusty conditions or when airborne debris is present. Replace air cleaner parts, if very dirty.
9
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TILLER LUBRICATION
Check transmission oil level after first 5 hours of
operation. Remove Oil Fill Plug (Fig. 10). Oil Level must
be even with the Plug Hole (with Tiller level.) If necessary,
add Oil. Use SAE30 Non-Detergent Motor Oil. Replace
Oil Fill Plug.
Check transmission oil level after each 10 hours of
operation.
NOTE: It is not necessary to change the Oil in the Tiller
Transmission. If for any reason it must be changed, Oil
capacity is 22 oz.
ENGINE MAINTENANCE
WARNING: Always stop engine and
disconnect spark plug wire before cleaning,
lubricating or before performing any repairs
or maintenance.
•
•
Check oil level before each use and every 8 hours.
Maintain engine oil as instructed in the separate
engine manual.
•
Service air cleaner every 25 hours under normal
conditions. Clean every few hours under extremely
dusty conditions. Poor engine performance and
flooding usually indicates that the air cleaner should
be serviced. To service the air cleaner, refer to the
separate engine manual.
•
Spark plug replacement is recommended every 100
hours or yearly. Check the engine manual for correct
plug type and gap specifications.
10
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SERVICE AND ADJUSTMENTS
WARNING: Shut off (disengage) the Tine
Clutch Lever, the Tiller Engine and the Tractor
Engine before making any repairs.
TO REPLACE V-BELT
Replace V-belt if it has been damaged considerably from
slipping under heavy loads or if it show cracks or frayed
edges. Refer to figures 11 and 12.
IMPORTANT: Do not move or remove the belt guide.
If the position of the belt guide is accidentally altered,
return it to the correct setting (6-1/2" above the tine shield
support plate).
•
•
•
•
•
Remove the screw from the top of the belt guard.
Remove the hex nut from the rear of the guard.
Remove the belt guard to allow access to drive belt.
Disengage tine clutch lever and remove belt.
FIG. 12
Reverse above procedures for installation of new belt.
FIG. 11
11
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WARNING: Shut off (disengage) the Tine
Clutch Lever, the Tiller Engine and the Tractor
Engine before making any repairs.
SPARE TINE DRIVE BOLTS
•
The Tiller drive components are protected from
damage by (shearable) Grade 5 hex bolts in the
Tine Assemblies. The hex bolts drive the tines and
hold them in the proper location. Should the Tine
Assemblies strike or pick up a large hidden object
or become jammed, the hex bolts will break and the
drive components will not be damaged.
TINE CARE
•
For best results--Tine Blades should be kept
reasonably sharp. The Tine Blade can be sharpened
on a grinding wheel. Do not attempt to sharpen Tines
while they are mounted to Tiller.
•
•
Two extra tine hex bolts and nuts are included with
the tiller. They are located in the Tiller Stake Support
Bracket on the rear of the Tiller.
The tine hex bolts are designed to be loose fit. Do not
attempt to use a bolt or pin that is larger or harder
than the original Grade 5 hex bolts.
STORAGE
Immediately prepare your tiller for storage at the end of
the season or if the unit will not be used for 30 days or
more.
•
•
Lubricate as instructed in the Customer
Responsibilities section of this manual.
Be sure that all nuts, bolts and screws are securely
fastened. Inspect moving parts for damage, breakage
and wear. Replace if necessary.
Touch up all rusted or chipped paint surfaces; sand
lightly before painting.
If possible, store tiller indoors and cover it to protect
from dust and dirt.
Cover tiller with a suitable protective cover that does
not retain moisture. Do not use plastic. Plastic cannot
breathe, which allows condensation to form and will
cause your unit to rust.
CAUTION: Never store the tiller with
gasoline in the tank inside a building,
where fumes may reach an open flame
or spark. Allow the engine to cool before
storing in any enclosure.
•
•
•
ENGINE
•
Follow the instructions in the "Service & Storage"
section of the Engine Manual.
WARNING: Never cover Tiller while
engine and exhaust areas are still warm.
TILLER
•
•
Clean entire tiller (See "CLEANING" in the Customer
Responsibilities section of the manual).
Inspect and replace belts, if necessary (See belt
replacement instructions in the Service and Adjust-
ments section of this manual.
12
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TROUBLESHOOTING
Follow the instructions in the "Service & Storage" section of the
Engine Manual when performing any work on the Engine.
13
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PARTS
REPAIR PARTS FOR MODEL
486.25244 36" TOW-BEHIND
UNIVERSAL TILLER
14
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REPAIR PARTS FOR MODEL 486.252444 36" TOW-BEHIND UNIVERSAL TILLER
REF. PART NO. QTY.
DESCRIPTION
Engine (49 State)
Engine (California)
Guide - Belt
Bolt, 5/16-18 x 1-1/2" Hex Head
Screw, 5/16-18 x 5/16"
Key, Square 1/4" x 2"
Pulley
Nut, 1/2-12 Nylock Jam
Nut, 1/2-12 Hex Jam
Spring, Depth Extension
Hitch Bracket Assembly
Bolt, 5/16-18 x 1" Hex Head
Locknut, 5/16-18 Hex
Lift Handle Assembly
Screw, Self-Tapping 1/4" x 1/2"
Washer, 5/16" Std. Wrt.
Ring, Retainer
REF. PART NO. QTY.
DESCRIPTION
Tine & Hub Assembly - RH
Tine & Hub Assembly - LH
Bolt, 3/8-16 x 2"
Bolt, Hex 5/16-24 x 1"
Pin, Hitch
1
40993
40997
48346
1
1
1
4
1
1
1
1
1
1
1
5
1
1
3
1
1
1
1
6
1
1
1
44
45
46
47
48
49
50
HA20094
HA20088
43054
47600
HA5236
43062
1
1
4
1
1
1
2
1
1
8
2
2
1
2
1
1
2
3
4
5
6
7
8
9
43085
HA115321
HA11154
HA20176
48733
HA124934
HA19860
64282
43063
43064
64343
48840
Hex Bolt, 3/8-16 x 1-1/2"
Wheel
HA20918
51 R74780828
Bolt, 1/2-13 x 1-3/4" Hex Head
Pivot Axle Assembly
Bolt, 3/8-16 x 1" Carriage
Strap Frame Extension
Pin, Clevis
Stake, Drag
Wheel Weight Support Bracket
Decal, Danger
52
53
54
55
56
57
58
59
60
61
HA20670
43350
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
HA20725
HA3433
HA20690
HA20932
HA20940
25830
43081
Plate, Fender Support
HA20135
HA20184
HA20178
47189
24848
HA23199
24847
47810
41576
18 Nut, Hex 5/16-18 Nylock
Pulley, Input
Bolt - Shoulder
Nut, Hex Nylock 1/4-20
Clutch Rod
Switch, Safety Interlock
Lever, Clutch
5
1
2
1
1
1
3
2
1
1
2
1
2
1
6
1
1
5
1
4
2
1
1
1
1
1
Hex Bolt - 3/8-16 x 1-3/4"
Bolt, 1/2-13 x 5-1/2" Hex Head
Bolt, 5/16-18 x 1" Carriage
Belt Guard (incl. #69)
Washer
Strap-Frame Extension Brace
Nut, 1/2-13 Nylock
Decal, Danger
Decal
Spacer
Washer
Nut, Hex 5/18-11 Nylock
Spacer
Bolt, Hex 5/8-11 x 7-1/2"
Pin - 1/8" x 1-1/4" Cotter
Rod - Lift
Anchor - Adjustment
Flat Washer, 17/32" x 1-1/6" x .095"
Nut - 1/2-20 Hex Jam
Flat Washer, 13/16" x 1-1/2" x .134"
Pin - Hair Cotter
Shield, Tine (LH)
Shield, Tine (RH)
Nut, Hex 1/4-20
Washer, 5/8"
Owner's Manual
62 R74760884
63
64
65
66
67
68
69
44326
24849
HA14306
HA20691
712-3083
HA20938
HA20942
HA5713
HA15200
712-0261
HA7974
48278
HA21362
HA20170
C-9M5732
HA20134
HA9131
43661
19 Nut, Hex Nylock 3/8-16
1
2
1
4
Grip, Handle
Rivet, Pop
Bracket, Belt Guide & Idler Mounting 70
Screw, 5/16-18 x 3/4" Self Tap
71
72
73
74
75
76
77
78
79
80
81
82
83
84
11 Bolt, 1/4-20 x 1" Hex Head
HA20185
24863
HA20119
24843
HA20186
24844
24846
HA11496
HA20187
43013
64284
43182
1
1
1
1
1
1
1
1
1
7
1
4
1
1
1
Key, Woodruff No. 61
Cover, Drive
Transmission - Complete
Chassis, Left
Spring, Extension
Chassis, Right
Bracket, Idler
43010
HA20688
HA19649
HA120396
HA124934
HA456151
HA20481
HA22594
HA22595
43178
Pulley, Idler
V-Belt
Nut, 1/4-20 Hex Lock
Module
Bolt, 5/16-18 x 3/4" Hex Hd.
Rear Guard Assembly - LH
Pin - Hair Cotter 5/32"
Rear Guard Assembly - RH
HA20112
714-0117
HA20113
85 R19212113
49940
*Standard Hardware - Purchase Locally
15
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REPAIR PARTS FOR MODEL 486.252444 36" TOW-BEHIND UNIVERSAL TILLER
REF. PART NO. QTY.
DESCRIPTION
1
2
3
4
5
HA20344
43064
HA20123
HA20122
43013
2
8
2
2
Dust Cap
Locknut, 5/16-18 *
Flange & Bearing Assy
Gasket, Flange
17 Locknut, 1/4-20 Hex *
6
7
8
9
HA20120
HA20136
HA20127
HA20121
43866
1
1
1
1
Drive Housing & Bearing Assy - LH
Gasket, Drive Housing
Tine Shaft Assy
Drive Housing & Bearing Assy - RH
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
15 Bolt, Hex 1/4-20 x 5/8" Grade 8
HA20125
HA20124
HA20130
HA20129
HA20132
HA20128
HA20133
HA20131
HA20135
43012
2
2
1
4
1
1
1
1
1
2
4
1
2
3
Washer, Felt
Seal, Rubber
Plug, Transmission Oil
Washer, Thrust
Chain Assembly #40
Chain Assembly #50
Input Shaft Assembly
Idler Shaft Assembly
Ring, Retainer 5/8" Dia. Shaft
Bolt - 1/4-20 x 3/4" Hex Head *
Bearing
HA20137
HA20145
HA20155
HA20138
Seal
Bearing, Flange
Cap, Bearing
*Standard Hardware - Purchased Locally
16
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NOTES
17
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NOTES
18
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NOTES
19
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