MTD 21AA412A700 User Manual REAR TINE TILLER Manuals And Guides 1109109L

410 Thru 420 1109109L

User Manual: MTD 21AA412A700 21AA412A700 MTD REAR TINE TILLER - Manuals and Guides View the owners manual for your MTD REAR TINE TILLER #21AA412A700. Home:Lawn & Garden Parts:MTD Parts:MTD REAR TINE TILLER Manual

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Operator's Manual

Rear Tine Tiller
Model Series
410 Thru 420

Model Series 410 Shown

IMPORTANT:

READ SAFETY

RULES AND INSTRUCTIONS

CAREFULLY

Warning:

This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forestcovered, brush-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 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 engine authorized
service dealer or contact the service department, P.O. Box 361131 Cleveland, Ohio 44136-0019.

MTD LLC, P.O. BOX 361131 CLEVELAND,
PRINTED IN U.S.A.

OHIO 44136-0019
FORM NO. 770-10136D
(10/03)

TABLEOFCONTENTS
Content

Page
3
5
8

Important Safe Operation Practices
Assembling Your Tiller
Know Your Tiller
Operating Your Tiller
Making Adjustments

9
11

Content
Maintaining Your Tiller
Troubleshooting
Illustrated Parts List

Page
11
13
14
24

Warranty

FINDINGMODELNUMBER
This Operator's Manual is an important part of your new tiller. It will help you assemble, prepare and
maintain the unit for best performance. Please read and understand what it says.
Before you start assembling your new equipment, please locate the model plate on the
equipment and copy the information from it in the space provided below. A sample model plate is
also given below. You can locate the model plate by standing at the operating position and
looking down at the center of the rear tine cover. This information will be necessary to use the
manufacturer's web site and/or help from the Customer Support Department or an authorized
service dealer.

Copy the model number here:

www.m{uprOuuc_s.com

P. O. BOX

3611131

CLEVELAND,OH
330-228-4683

44136

Copy the serial number here:

888-888-7318

CUSTOMER
SUPPORT
Please do NOTreturn theunit to the retailer from where it waspurchased,withoutfirst contactingCustomerSupport.
If you have difficulty assembling this product or have any questions regarding the controls, operation or
maintenance of this unit, you can seek help from the experts. Choose from the options below:
Visit mtdproducts.com for many useful suggestions. Click on Customer Support button and
you will get the four options reproduced here. Click on the appropriate button and help is
immediately available.

answer you are
looking for could be just
a mouse

c//cA awayf

answer

looking
a mouse

are

for could be just
"

c//cA awayf

If you prefer to reach a Customer Support Representative, please call 1-800-800-7310.

En ine

The engine manufacturer is responsible for all engine-related issues with regards to
performance, power-rating, specifications, warranty and service. Please refer to the engine
manufacturer's Owner's/Operator's Manual, packed separately with your unit, for more
information.

SECTION1: IMPORTANT
SAFEOPERATION
PRACTICES
WARNING:

This symbol points out important safety instructions which, if not followed, could
endanger the personal safety and/or property of yourself and others. Read and follow all instructions in
this manual before attempting to operate this machine. Failure to comply with these instructions may
result in personal injury. When you see this symbol - heed its warning.

WARNING:

Engine Exhaust,

some of its constituents,

and certain vehicle

components contain or emit chemicals known to State of California
and birth defects or other reproductive harm.
DANGER:

to cause cancer

This machine was built to be operated according to the rules for safe operation in this

manual. As with any type of power equipment, carelessness or error on the part of the operator can
result in serious injury. This 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.

Training
1.

Read, understand, and follow all instructions on the
machine and in the manual(s) before attempting to
assemble and operate. Keep this manual in a safe
place for future and regular reference and for
ordering replacement parts.
Be familiar with all controls and their proper
operation. Know how to stop the machine and
disengage them quickly.
Never allow children under 14 years old to operate
this machine. Children 14 years old and over should
read and understand the operation instructions and
safety rules in this manual and should be trained
and supervised by a parent.
Never allow adults to operate this machine without
proper instruction.
Keep bystanders, helpers, pets and children at least
75 feet from the machine while it is in operation.
Stop machine if anyone enters the area.

7.
8.
9.
10.
11.
12.

spilled on yourself or your clothes which can ignite.
Wash your skin and change clothes immediately.
Use only an approved gasoline container.
Extinguish all cigarettes, cigars, pipes and other
sources of ignition.
Never fuel machine indoors.
Never remove gas cap or add fuel while the engine
is hot or running.
Allow engine to cool at least two minutes before
refueling.
Never over fill fuel tank. Fill tank to no more than ½

15.

inch below bottom of filler neck to provide space for
fuel expansion.
Replace gasoline cap and tighten securely.
If gasoline is spilled, wipe it offthe engine and
equipment. Move machine to another area. Wait 5
minutes before starting the engine.
Never store the machine or fuel container inside

Preparation

16.

near an open flame, spark or pilot light (e.g.
furnace, water or space heater, clothes dryer etc.).
Allow machine to cool 5 minutes before storing.

Operation

4.
5.

3.
4.
5.

Thoroughly inspect the area where the equipment is
to be used. Remove all stones, sticks, wire, and
other foreign objects which could be tripped over
and cause personal injury.
Wear sturdy, rough-soled work shoes and close
fitting slacks and shirt. Loose fitting clothes or
jewelry can be caught in movable parts. Never
operate this machine in bare feet or sandals.
Disengage clutch levers and shift (if provided) into
neutral CN") before starting the engine.
Never leave this machine unattended with the
engine running.
Never attempt to make any adjustments while
engine is running, except where specifically
recommended in the operator's manual.
To avoid personal injury or property damage use
extreme care in handling gasoline. Gasoline is
extremely flammable and the vapors are explosive.
Serious personal injury can occur when gasoline is

13.
14.

1.
2.
3.

Do not put hands or feet near rotating parts. Contact
with the rotating parts can amputate hands and feet.
Do not operate machine while under the influence
of alcohol or drugs.
Never operate this machine without good visibility
or light. Always be sure of your footing and keep a
firm hold on the handles.
Keep bystanders, helpers, pets, and children at
least 75 feet from the machine while it is in
operation.
area.

Stop the machine if anyone enters the

Be careful when tilling in hard ground. The tines
may catch in the ground and propel the tiller
forward. If this occurs, let go of the handle bars and
do not restrain the machine.

Exercise extreme caution when operating on or
crossing gravel surfaces. Stay alert for hidden
hazards or traffic. Do not carry passengers.

7.
8.
9.
10.
11.

Neveroperate
themachine
athightransport
Do not change the engine governor settings or
speedsonhardorslippery
surfaces.
over-speed the engine. The governor controls the
Exercise
cautiontoavoidslipping
orfalling.
maximum safe operating speed of the engine.
Lookdownandbehindandusecarewhenin
Maintain or replace safety and instruction labels, as
reverse
orpullingmachine
towards
you.
necessary.
Starttheengineaccording
totheinstructions
found 6.
Follow this manual for safe loading, unloading,
inthismanual
andkeepfeetwellawayfromthe
transporting, and storage of this machine.
tinesatalltimes.
7.
Never store the machine or fuel container inside
Afterstriking
aforeignobject,stoptheengine,
where there is an open flame, spark or pilot light
disconnect
thesparkplugwireandgroundagainst
such as a water heater, furnace, clothes dryer etc.
theengine.
Thoroughly
inspect
themachine
forany
Always refer to the operator's manual for proper
damage.
Repair
thedamage
beforestarting
and
instructions on off-season storage.
9.
operating.
If the fuel tank has to be drained, do this outdoors.
Disengage
allclutchleversandstopengine
before 10. Observe proper disposal laws and regulations for
youleavetheoperating
position
(behind
the
gas, oil, etc. to protect the environment.
handles).
Waituntilthetinescometoacomplete
stopbeforeunclogging
thetines,makingany
YourResponsibility
adjustments,
orinspections.
1.
Restrict the use of this power machine to persons
Neverrunanengine
indoorsorina poorly
who read, understand and follow the warnings and
ventilated
area.Engineexhaust
contains
carbon
instructions in this manual and on the machine.
monoxide,
anodorless
anddeadlygas.
2.
The safety label on the tiller is reproduced below for
Mufflerandenginebecome
hotandcancausea
your review. To ensure safe operation of the tiller,
burn.Donottouch.
follow the instructions on all labels closely.
Usecaution
whentillingnearfences,buildings
and
underground
utilities.Rotating
tinescancause
property
damage
orpersonal
injury.
Donotoverload
machine
capacity
byattempting
to
tillsoiltodeepattofastofarate.
Ifthemachine
shouldstartmaking
anunusual
noise
orvibration,
stoptheengine,disconnect
thespark
plugwireandgrounditagainsttheengine.Inspect
thoroughly
fordamage.
Repairanydamage
before
startingandoperating.
Keepallshields,
guardsandsafetydevices
inplace
andoperating
properly.
Neverpickuporcarrymachine
whiletheengineis
running.
Useonlyattachments
andaccessories
approved
by
themanufacturer.
Failuretodoso,canresultin
personal
injury.
Ifsituations
occurwhicharenotcovered
inthis
manual,
usecareandgoodjudgment.
Contact
your
dealerortelephone
1-800-800-7310
forassistance
andthenameofyournearest
servicing
dealer.
4.

12.

13.
14.
15.
16.
17.

18.
19.
20.
21.

Maintenance& Storage
1.
2.

Never tamper with safety devices. Check their
proper operation regularly.
Check bolts and screws for proper tightness at
frequent intervals to keep the machine in safe
working condition. Also, visually inspect machine for
any damage.
Before cleaning, repairing, or inspecting, stop the
engine and make certain the tines and all moving
parts have stopped. Disconnect the spark plug wire
and ground it against the engine to prevent
unintended starting.

SECTION2: ASSEMBLING
YOURTILLER
NOTE: This operator's manual covers various models
of tillers. The units illustrated may vary slightly from
your unit. Follow only those instructions which pertain
to your model number.

Insert hex bolt into the top hole of the depth stake
assembly. Place flat washer on the hex bolt and
thread "T" knob onto the hex bolt. Tighten securely.
See Figure 1.
Tip the tiller back down so it rests on the tines.

NOTE: References to right or left side of the tiller are
determined from behind the unit in the operating
position.

Flat Washer

rpin Clip

ToRemoveUnitFromCarton
•

Remove staples, break glue on top flaps, or cut
tape at carton end and peel along top flap to open
carton.

•

Remove loose parts included with unit (i.e.,
operator's manual, etc.).
Cut corners and lay carton down flat.
Remove packing material.
Roll or slide unit out of carton. Check carton

•
•
•
•

Hex Bolt

T-Knob
Clevis Pin

Depth Stake

thoroughly for loose parts.
Extend control cable and lay on the floor. Be careful
not to bend or kink control cable.

IMPORTANT: This unit is shipped without gasoline or oil
in the engine. Be certain to service engine with gasoline
and oil as instructed in the separate engine manual
before operating your machine.

Figure 1

AttachingHandleAssembly
•

LoosePartsIn Carton
Depth Stake
Handle Assembly
Shift Rod
Handle Adjustment Rod (Model series 420 only)
NOTE: All hardware needed for assembly is attached
to the loose parts or the tiller.

•

Remove the handle adjustment crank, flange nut,
retainer bracket, shoulder bolt, and lock nut from
the pivot bracket.
Place the handle assembly in position in the handle
pivot bracket lining the upper holes in the handle
with the slots in the pivot bracket. See Figure 2.
Retainer Bracket,
Shoulder Bolt, & Lock Nut
Handle Adjustment Crank

and Flange Nut_

j
/

BeforeAssembly
and
ground Disconnect
it against the
prevent
WARNING:
theengine
spark toplug
wire
unintended starting.

AttachingDepthStake
•
•

•

Tip the tiller forward so it rests on front
counterweight.
Unthread the "T" knob from the top of the depth
stake and remove the flat washer and hex bolt.
Remove the hairpin clip from the clevis pin.
See Figure 1.
Raise the tine shield hinge flap assembly and insert
the depth stake assembly in the slot (under the tine
shield) and up through the tine shield assembly.
Insert clevis pin through the tine shield and depth
stake assemblies. Secure with hairpin clip.

Pivot Bracket
Figure 2
Lift up the handle assembly and align the bottom
holes in the handle assembly with the holes in the
pivot bracket. Insert shoulder bolt from the left side
of unit through the pivot bracket and the retainer
bracket on the right hand side of the unit.
See Figure 3.

Retainer Bracket
Shoulder Bolt & Lock Nut

Handle
ustment Rod
(Model Series 420)

Gear

Figure 3
•

•

Place the hex opening of the flange nut retainer
bracket over the flange nut securing the handle
adjustment crank and install the lock nut on the
lower shoulder bolt. See Figure 4.
Pivot handle assembly into position desired.
Tighten the bottom bolt, lock nut, and the handle
adjustment lock securely.

Gear Shift Rod

Rubber Washer
-lat Washer
Hairpin Clip

Handle Ad ustment Crank

Retainer Bracket

Figure 5

AttachingHandleAdjustmentRod
(Model420 seriesonly)
•
Figure 4

AttachingGearShiftRod

Remove the T-handle, flange
rubber washer from the ends
adjustment rod. Slide the rod
side of bracket on the front of
Refer to Figure 5.

Handle
Adjustment

NOTE: Model series 420 tiller has two control rods. The
gear shift rod is the longer rod and must be assembled
on the right side on handle.
•

•

Remove the T-handle, hairpin clip, flat washer and
rubber washer from the end of the gear shift rod.
Slide the rod up through the right side of bracket on
the front of the handle assembly. See Figure 5.
Insert the end of the gear shift rod through the
opening in the top of the shift cover and into the
shift bracket. Secure with rubber washer first, flat
washer, and then hairpin clip. See Figure 5.
Install the nut and T-handle on the gear shift rod.

nut, hairpin clip, and
of the handle
up through the left
the handle assembly.

Rod

Positioner

Rubber
Washer

Figure 6

•

Slide the rubber washer on the unthreaded end of
the handle adjustment rod and insert the end of the
handle adjustment rod into the positioner bracket
beneath the handle and on top of the tine shield.
Secure with hairpin clip. See Figure 6.
Reinstall the nut and T-handle.

Attaching ClutchCable
•

Route the clutch cable underneath the handle and
through the cable clip. Be careful not to bend or
kink the cable. See Figure 7.
Handle Adjustment Crank

Pull the cable upwards to obtain slack and hook the
Z end of the cable from right to left into the bracket
on the clutch control (beneath the handle panel).
Tighten the nut against the cable bracket.
See Figure 8.
NOTE: Do not overtighten clutch cable, since too much
tension may cause it to break.

FinalClutchAdjustment
IMPORTANT:Service the engine with oil and gasoline
before checking this adjustment. Refer to the separate
engine manual packed with your tiller.
Position the tiller so the front counterweight is
against a solid object, such as a wall. With the gear
selection lever in NEUTRAL, start the engine. Refer
to Operation section.

Cable
Clip

NOTE: Keep hands out of belt area while unit is
operating.
•

Figure 7
•

Remove one hex nut from the threaded casing on
the end of the cable. Slip the wire up through the
slot on the cable bracket underneath the handle.

•

Push the end of the casing up through the cable
bracket. Rethread the hex nut on the end of the
cable. Do not tighten at this time.

Standing on the right side of the tiller, visually
examine the belt (inside the belt cover). It should
not be turning.
•
If the belt turns with the unit in neutral, adjust by
moving the hex nut below the cable bracket down a
few turns.Tighten the upper hex nut against the
bracket. See Figure 8.
•
Now move the shift lever to FORWARD (Wheels
Forward) position. Carefully engage the clutch by
squeezing the clutch handle against the handle.
The wheels should spin.
•
If the wheels do not spin with the unit in
forward, adjust by moving the hex nut which is
above the cable bracket up a few turns. Tighten the
bottom hex nut against the bracket.
Recheck both adjustments, and readjust as necessary.
Make certain hex nuts at cable bracket are tight (do not
overtighten clutch cable).
NOTE: If additional adjustment is required, it may be
necessary to remove the belt cover and move the hex
nuts at the other end of the clutch cable to increase belt
tension.

Hex Nut

\
Lock
Washer

Tire Pressure

Hex

End

Slot in
Cable Bracket

(Viewed From Under Handle)
Figure 8

The tires on your unit may be over-inflated for shipping
purposes. Reduce the tire pressure before operating
the unit. Recommended operating tire pressure is
approximately 14 p.s.i, on 14 inch tires and 20 p.s.i, on
16 inch tires.(Check sidewall of tire for tire
manufacturer's recommended pressure).
WARNING: Maximum tire pressure under
any circumstances is 30 p.s.i. Equal tire
pressure should be maintained on both
tires.

SECTION3: KNOWYOURTILLER
Gear Selection

Handle
Handle
Adjustment

Clutch

"_......__

Gear Shift Rod

Cran

\Handle
Adjustment

Stake

Rod

Model 420 Series

Model 410 Series

Figure 9
Reverse
_,

all instructions and warnings on the
WARNING: Read, understand, and follow
machine and in this manual before
operating.

GearSelectionHandle
The gear selection handle is located on the front of the
handle assembly (right handle on Model 420 Series). It
is used to select NEUTRAL, REVERSE, orone of the
FORWARD modes.
This tiller is designed for the gear selection handle to be
moved while the engine is running. (It will be difficult to
obtain all four positions with the engine off.) Pull or push
the handle so that the indicator on top of shift cover
points to the area of the operating mode desired.
See Figure 9.
NOTE: If difficulty is encountered in moving the gear
selection handle, refer to the following helpful hints:
•

•

To shift into forward or reverse wheel drive, move
tiller forward slightly then backward to allow the
gears to synchronize.
To shift into forward wheels and tine drive, push
forward slightly on the gear selection handle and
slowly engage the clutch handle allowing the gears
to synchronize.
To stop forward movement and tine drive, release
the clutch handle. Do not shift gears with the clutch
handle engaged except when engaging the tines.

Reverse wheel drive only.
Neutral
Transmission

is in neutral.

Wheels Forward
Forward wheel drive only.
Tines Reverse
Forward wheel drive and reverse tine drive.
is
,_

NEUTRAL
starting
the engine.
WARNING: when
Make
certain
unit

ClutchHandle
The clutch handle is located beneath the handle.
Squeezing the clutch handle against the handle
engages the wheel and tine drive mechanisms.
See Figure 9.

ThrottleControl
The throttle control lever is located on the engine. It
controls the engine speed and stops the engine.

ChokeLever(If Equipped)
The choke lever is located by the throttle. It is used to
enrich the fuel mixture in the carburetor when starting a
cold engine.

PrimerButton(If Equipped)
The primer button is located behind the air cleaner. It is
used to enrich the fuel mixture in the carburetor when
starting a cold engine.

DepthStake
The depth stake controls the tilling depth. Refer to
"Setting the Depth" in the Operating Section.

HandleAdjustmentCrank
The handle may be adjusted to the height desired.
Loosen the handle height adjustment lock a few turns.
Pivot handle up or down to desired position. Tighten
lock. See Figure 9.

On Model 420 series, the handle may also be adjusted
to be in line with the tiller or swung to the left or right so
the operator is not walking in the freshly tilled soil. To
adjust the handle position from side to side, pull the
handle adjustment handle back, pivot the tiller handle to
desired position and release the handle.

FuelShut-OffValve

Equipped)

Make sure the valve is in the On (horizontal) position
when starting the unit. Any time the tiller is not in
operation (i.e., storing, performing maintenance or
adjustment), make sure the valve is in the OFF
(vertical) position.

EngineControls
See the separate engine manual for additional
information and functions of the engine controls.

SECTION4: OPERATING
YOURTILLER
,_

all instructions
and warnings on the
WARNING: Read, understand, and follow
machine
and in this manual before
operating.

BeforeStarting
GasAndOilFill-Up
Service the engine with gasoline and oil as instructed in
the separate engine manual packed with your tiller.
Read instructions carefully.
WARNING:
Use extreme
care when
handling gasoline. Gasoline is extremely
flammable and the vapors are explosive.
Never fuel machine indoors or while the
engine is hot or running.

StartingEngine
NOTE: When pushing the unit with the engine off, you
will hear a ratcheting sound (gear noise) which is
normal.

_,
•
•

•

front of the tiller while the engine is
WARNING: Be sure no one is standing in
running or being started.
Place gear selection lever in NEUTRAL.
Place the throttle control lever in FAST position or if
equipped, place the engine speed control in the
START position.
Move choke lever to CHOKE position or, if
equipped, push primer two (2) or three (3) times.
Wait about two (2) seconds between each push.

NOTE: A warm engine may not require choking or to be
primed.
•

•

•
•

Stand at side of tiller. Grasp the starter handle and
pull out slowly, until it pulls slightly harder. Let rope
rewind slowly.
Pull starter handle rapidly. Do not allow handle to
snap back. Allow it to rewind slowly while keeping a
firm hold on the starter handle.
Repeat previous steps until engine starts.
As engine warms up and begins to operate evenly,
move choke lever gradually to RUN position. If
engine falters, return to choke position, then slowly
move to RUN position.

NOTE: See your engine manual packed with your unit
for more detailed instructions.
NOTE: After starting and prior to using the tiller for the
first time, be certain to check the clutch adjustment as
described in "Checking the Clutch Adjustment" section
of the Assembly Instructions.

ToStopEngine
•
•

Move throttle control to STOP or OFF position.
Disconnect spark plug wire and ground to prevent
accidentally starting while equipment is
unattended.

NOTE: After the first ten hours of operation, recheck
the clutch adjustment. Refer to final clutch adjustment
in Assembly Instructions.

SettingTheDepth
Tilling depth is controlled by the depth stake which can
be adjusted to five different settings. Adjust the side
shields as you adjust the depth stake.

•

To transport tiller, lower the depth stake (use top
adjustment hole).
To adjust the depth stake, remove the clevis pin and
hairpin clip. Move the depth stake to the desired setting
and secure with the clevis pin and hairpin clip.
See Figure 10.
To adjust the side shields, remove the wing nuts. Move
the side shield to the desired position and replace the
wing nuts. Tighten securely.

disconnected and grounded against the
WARNING: Be certain spark plug wire is
engine when performing any adjustments.
•

When using the tiller for the first time, use the
second adjustment hole from the top (1" of tilling
depth). See Figure 10.
Use This Position _
First

_ort Position

OperatingtheTiller

Clevis Pin

•
•
•

Select the depth stake setting.
Start engine as instructed on the previous page.
Move gear selection handle to one of the forward
modes or reverse.
WARNING: Do not move the gear selection
handle with the wheels or tines engaged.
Make
certain
the
unit
is stopped
completely
before changing
the gear
selection. A partial engagement may be
necessary when engaging tines.

•
Use This Hole For
Lowest (Shallowest)
Position

NOTE: Make certain the gear selection indicator is
correctly positioned before engaging the clutch handle.
If it is between gears, the engine will stall.

To transport tiller, do not engage the tines. Select the
wheel drive only.
handles so that the wheels are lifted offthe
WARNING:
Do not push down on the
ground while using the tine drive, or the
tiller could move backward and cause
personal injury.

-----Use This Hole For
Highest (Deepest)
Position

For best results, it is recommended the garden be tilled
twice (lengthwise, then widthwise) to pulverize the soil.

Figure 10
•

•

Squeeze the clutch handle against the handle to
engage the wheels and tines.

When breaking up sod and for shallow cultivation,
use the setting which gives 1" of tilling depth
(second hole from the top). Place the side shields in
their lowest position.
For further depth, raise the depth stake and side
shields and also make one or two more passes
over the area.
When tilling loose soil, the depth stake may be
raised to its highest position (use bottom
adjustment hole) to give the deepest tilling depth.
Raise the side shields to their highest position.

SECTION5: MAKINGADJUSTMENTS
,_

BeltTensionAdjustment

adjustments
while the
engine
running,
WARNING: Never
attempt
to is
make
any
except where specified
in operator's
manual.

Periodic adjustment of the belt tension may be required
due to normal stretch and wear on the belt. Adjustment
is needed if the tines or wheels seem to hesitate while
turning, but the engine maintains the same speed.

HandleAdjustment

To adjust the tension on the belt, refer to Final Clutch
Adjustment in Assembly Instructions.

The handle may be adjusted to the height desired and
on Model 420 series, the handle may also be adjusted
to be in line with the tiller or swung to the left or right.
Refer to the handle adjustment in the Know Your Tiller
section for details.

EngineAdjustment
Refer to the separate engine manual for engine
adjustment instructions.

SECTION6: MAINTAININGYOURTILLER
Lubrication
,_

and ground it against the engine before
WARNING: Disconnect the spark plug wire
performing any repairs or maintenance.

Transmission
The transmission is pre-lubricated and sealed at the
factory. It requires no checking unless the transmission
is disassembled. To fill with grease, lay the right half of
the transmission on its side, add 22 ounces of
Benalene 920 grease, and assemble the left half to it.
This grease can be obtained at your nearest authorized
dealer by ordering part number 737-0300.

Engine
Refer to the separate engine manual for engine
maintenance instructions.
Maintain engine oil as instructed in the separate
engine manual packed with your unit. Read and follow
instructions carefully.

Clutch Handle

Service air cleaner every ten hours under normal
conditions. Clean every hour 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 packed with your unit.

Lubricate the pivot point on the clutch handle and the
cable at least once a season with light oil. The control
must operate freely in both directions.
Pivot Points
Lubricate all pivot points and linkages at least once a
season with light oil.

IMPORTANT: Never run your engine without air cleaner
completely assembled.

Tine Shafts
Remove tine assemblies and lubricate the tine shafts at
least once a season.

The spark plug should be cleaned and the gap reset
every 25 hours of engine operation. Spark plug
replacement is recommended at the start of each tiller
season; check engine manual for correct plug type and
gap specification.

Wheel Shafts
Remove wheel assemblies and lubricate the axle shafts
at least once a season.

Clean the engine regularly with a cloth or brush. Keep
the cooling system (blower housing area) clean to
permit proper air circulation which is essential to engine
performance and life. Be certain to remove all dirt and
combustible debris from muffler area.

Cleaning
TineArea
Clean the underside of the tine shield after each use.
The dirt washes off the tines easier if rinsed off
immediately instead of after it dries. Always towel dry
the tiller afterwards and apply a light coat of oil or
silicone to prevent rusting or water damage.
IMPORTANT:Never use a "pressure washer" to clean
your tiller. Water can penetrate tight areas of the tiller
and its chaincase and cause serious damage to the
unit.

Tires

NOTE: Upon reassembly, make certain the belt is
routed over the idler pulley and inside of belt keepers by
engine pulley. See Figure 11.

Recommended operating tire pressure is
approximately 14 p.s.i, on 14 inch tires and 20 p.s.i, on
16 inch tires. (Check sidewall of tire for tire
manufacturer's recommended pressure). Maximum tire
pressure under any circumstances is 30 p.s.i. Equal tire
pressure should be maintained on both tires.

Engine
Pulley

Belt Keeper

Hex Bolt

When installing a tire to the rim, be certain rim is clean
and free of rust. Lubricate both the tire and rim

Idler

generously.
WARNING: Excessive pressure (over 30
p.s.i.) when seating beads may cause tire/
rim assembly to burst with force sufficient
to cause serious injury.

BeltReplacement
Your tiller has been engineered with a belt made of
special material (Kevlar Tensile) for longer life and
better performance. It should not be replaced with an
off-the-shelf belt. Order all belts through you authorized
service dealer.
•
•

Figure 11

Disconnect and ground the spark plug wire against
the engine.
Remove the belt cover from the left side of the tiller

0ff-Seas0nStorage

by removing two torx head screws from the top of
belt cover.
•

•

If the tiller will not be used for a period longer than 30
days, the following steps should be taken to prepare the
tiller for storage.

Remove two hex cap nuts and flat washers from
front side of the belt cover. Remove the hex nut and
flat washer at the back of the cover.

•

Remove the belt keeper assembly located behind
the engine pulley by removing two hex bolts and
lock washers. See Figure 11.
Remove belt and reassemble the new belt. Follow
instructions in reverse order.

•

•
•
•

Clean the exterior of engine and the entire tiller
thoroughly. Lubricate the tiller as described in the
lubrication instructions.
We do not recommend the use of pressure
washers to clean your unit. They may cause
damage to electric components, spindles, pulleys,
bearings or the engine. The use of pressure
washers will result in shortened life and reduce
serviceability.
Refer to the engine manual for correct engine
storage instructions.
Wipe tines with oiled rag to prevent rust.
Store tiller in a clean, dry area. Do not store next to
corrosive materials, such as fertilizer.

NOTE: When storing any type of power equipment in
an unventilated or metal storage shed, care should be
taken to rustproof the equipment. Using a light oil or
silicone, coat the equipment and especially any
springs, bearings, and cables.

SECTION7: TROUBLE
SHOOTING
GUIDE
Trouble

Possible

Engine fails to
start

Fuel tank empty, or stale fuel.

Fill tank with clean, fresh gasoline. Fuel will not last over thirty
days unless a fuel stabilizer is used.

Throttle control lever not in correct starting
position (if so equipped).
Blocked fuel line.

Move throttle lever to start position.

Dirty aircteaner.

Refer to the engine manual packed with your unit.

Choke not in ON position.

Move choke to ON position.

Spark plug wire disconnected.

Connect wire to spark plug.

Faulty spark plug.

Clean, adjust gap or replace.

Engine flooded.
Unit running on CHOKE.

Refer to the engine manual packed with your unit.
Move choke lever to OFF position.

Spark plug wire loose.
Blocked fuel line or stale fuel.

Connect and tighten spark plug wire.

Engine runs
erratic

Corrective

Cause(s)

Action

Clean fuel line.

Vent in gas cap plugged.

Clean fuel line; fill tank with clean, fresh gasoline. Fuel will not
last over thirty days unless a fuel stabilizer is used.
Clear vent.

Water or dirt in fuel system.

Drain fuel tank. Refill with fresh fuel.

Dirty air cleaner.

Refer to the engine manual packed with your unit.

Carburetor out of adjustment.
Engine oil level tow.

Refer to the engine manual packed with your unit.
Fill crankcase with proper oil.

Dirty air cleaner.
Air flow restricted.

Refer to the engine manual packed with your unit.

Tines do not

Carburetor not adjusted properly.
Foreign object lodged in tines.

Adjust carburetor as instructed in separate engine manual.
Dislodge foreign object.

engage

Tine clevis pin(s) missing.

Replace tine clevis pin(s).
Take unit to authorized service dealer.

Engine overheats

Refer to the engine manual packed with your unit.

Pulley and idler not in correct
adjustment.
Not shifting properly.

Refer to controls section of operator's manual for proper
shifting procedures.
Adjust control cable (see assembly instructions).

Wheels do not

Control cable not adjusted properly.
Belt worn and/or stretched.
Clevis pin missing.

engage

Tiller is not being shifted properly.

Refer to controls section of operator's manual for proper
shifting procedures.

Control cable not adjusted properly.
Belt worn and/or stretched.

Adjust control cable (see assembly instructions).

Replace belt.
Replace clevis pin.

Replace belt.

NOTE: For repairs beyond the minor adjustments above, contact your local authorized service dealer.

SECTION8: PARTSLISTFORMODELSERIES410THRU420

5
8

2\\
29
23

25
26

\
\

3,
39

[
I
I
I
I
[

ModelSeries410thru420
Ref.
No.

Part No.

Ref.
No.

Part Description

Part No.

Part Description

710-1017

Hex Screw 1/4-20 x.625

19.

714-0104

Cotter Pin

786-0101B

21.

710-1090

Flange Screw 5/16-18 x 1.25

786-0168

Shift Cover - Briggs & Stratton
Shift Cover - Tecumseh

22.

686-0031A

3.
4.

686-0095
712-3004A

Crank Shift Assembly
Hex Lock Nut 5/16-18

23.
24.

736-0119
710-0237

Belt Keeper Bracket Ass'y
Lock Washer 5/16

715-0120

Spiral Pin

25.

756-0971

Inner Pulley Half

786-0117

Shift Cover Mounting Bracket

26.

756-0972

710-3008

27.

754-0438

Outer Pulley Half
V-Belt

712-3010

Hex Cap Screw 5/16-18 x.75
Hex Nut 5/16-18

28.

756-0405

Flat Idler

9.
10.

736-0242
710-3180

Bell Washer.340 ID x.872 OD

738-0899
736-0256

Bolt 5/16-18 x 1/4-28 x 2.35
Flat Washer.635 ID x.930 OD

11.

710-1007

Hex Cap Screw 5/16-18 x 1.75
Hex Washer Screw 3/8-16 x 1.5

29.
30.
31.

756-0634

Flat Pulley

12.

619-0009

Frame Counterweight

32.

736-0105

Spring Washer.401 ID x.870 OD

13.

642-0015

Tine Assembly - LH

33.

712-0379
736-0452

Flange Lock Nut 3/8-24
Bell Washer.396 ID x 1.140 OD

642-0016

Hex Cap Screw 5/16-24 x.625

14.
15.

711-0415
714-0149B

Tine Assembly - RH
Clevis Pin
Cotter Pin

34.
35.
36.

710-0152
786-0080

Hex Cap Screw 3/8-24 x 1.0
Idler Bracket

16.

634-0240

17.
18.

Complete Wheel Ass'y - RH (14")

37.

710-0723

634-0241

Complete Wheel Ass'y - LH (14")

38.

738-0876

Hex Cap Screw 3/8-16 x 1.25
Shoulder Nut 7/16-20

634-0238

Complete Wheel Ass'y - RH (16")

39.

736-3020

Flat Washer.271 ID x.630 OD

634-0239

Complete Wheel Ass'y - LH (16")
Clevis Pin

40.

786-0100

Belt Cover

41.

712-0392

Hex Lock Nut 1/4

Tire Only (14")

42.

786-0107

Cable Bracket

Tire Only (16")

43.

686-0094

Gear Case Assembly

711-1017
734-1796
734-0808

IMPORTANT:
For a proper working machine, use Factory
Approved Parts.
V-BELTS are specially designed to engage and disengage
safely. A substitute (non OEM) V-Belt can be dangerous by not
disengaging completely.

ModelSeries410thru420

32
36
38

13
\
\

3
2

ModelSeries410thru420

Ref.
No.

Part No.

Ref.
No.

Part Description

Part No.

Part Description

721-0378

Shaft Seal 1.0 Dia

29.

786-0086

Reinforcement

Bracket

712-0378

Hex Nut 7/16-20

30.

721-0295

Chain Case Gasket

736-0407

Belt Washer.45 ID x 1.00D

31.

710-0258

721-0379

Shaft Seal.75 Dia

32.

736-0329

Hex Cap Screw 1/4-20 x.625
Lock Washer 1/4

716-0865

Snap Ring.50 Dia

33.

736-0512

Flat Washer.281 ID x.875 OD

686-0038

Gear Case Assembly - RH Half

34.

741-0124

618-0245B

Shift Assembly
Chain - #41 1/2" Pitch x 30 Links

35.

736-0541

Ball Bearing
Flat Washer

36.

717-1451A

Spur Gear 16T

Space 1.0 ID x 2.00D
Thrust Washer 1.03 ID x 1.62 OD

37.

713-0435

38.

736-0265

Sprocket 11T #41 Chain
Flat Washer.88 ID x 1.50 OD

Spacer.635 ID x 1.00D
Thrust Washer.445 ID x 1.92 OD

39.

716-0235

Retainer Ring

40.

718-0237
711-1087

Clutch Key
Drive Shaft

713-0233

10.

750-0570

11.

736-0163

12.

750-0936

13.

736-0518

14.

617-0004

15.

736-0351

Idler Gear Assembly
Flat Washer.760 ID x 1.50 OD

41.
42.

732-0863

16.

750-0938

Spacer.735

43.

741-0862

Compression Spring
Detent Ball

17.

717-1458

Spur Gear 46T

44.

718-0234

Clutch Collar

19.

611-0021

717-1409

20.

713-0226

Tine Shaft Assembly 18T
Chain - #50 5/8" Pitch x 52 Links

45.
46.

736-0442

Spur Gear 17T
Flat Washer.69 ID x 1.06 OD

21.

738-0885

Jack Shaft 5/8 Dia. X. 2.06 Lg

47.

732-0614

22.

750-0935

Spacer.635

48.

736-0518

23.

611-0058

Wheel Shift Assembly

49.

611-0016

24.

686-0039

50.

738-0884

Intermediate Gear Assembly
Jack Shaft

25.

710-0896

Gear Case Assembly - LH Half
Hex Washer Screw 1/4-14 x.625

51.

736-0336

Flat Washer.625 ID x 1.00D

26.

726-0331

Plug

52.

750-0931

Spacer.635 ID x.86 OD

27.

741-0563

617-0003

Tine Drive Assembly

28.

712-3067

Ball Bearing w/Snap Ring
Hex Patch L-Nut 7/16-20

53.

ID x.886 OD

ID x 1.00D

Wire Ring
Thrust Washer.445 ID x 1.90D

ModelSeries410

10_
-7

23
25

10
6

j
v

J
J
J
J

J
J

J
J
J

42_

ModelSeries410
Ref,
No.

Part No.

Ref.
No.

Part Description

Part No.

Part Description

710-1017

786-0131

Tap Screw 1/4-14 x.625
Handle Cover w/o Throttle

25.
26.

726-0106
747-0432

Cap Nut
Rod

710-0896

Hex Washer Screw 1/4-14 x.625

27.

786-0113

Rear Tine Shield Flap

4.
5.

720-0278A
735-0246

Foam Grip

28.

710-3005

End Plug

29.

736-0117

Hex Cap Screw 3/8-16 x 1.25
Flat Washer.375 ID x.620 OD

647-0014

786-0118

Clutch Control Assembly
Return Bracket- LH

30.
31.

710-3008
738-0849

Hex Cap Screw 5/16-18 x.75
Hex Screw 5/16-18 x.75

786-0098

Return Bracket-

32.

786-0085

Tine Shield

649-0017
720-0210A
712-3008

33.
34.
35.

712-0421
686-0044A
786-0090

Wing Nut

10.
11.

Handle Assembly
Knob
Jam Nut 3/8-16

12.

726-0330
747-0902

Cable Clip
Shift Control

36.
37.

786-0076
710-0376

Shield Bracket RH

13.
14.

735-0127

Rubber Washer.33 ID x.87 OD

38.

736-0169

Hex Cap Screw 5/16-18 x 1.0
Lock Washer 3/8

15.

714-0104

Cotter Pin

39.

711-0415

Clevis Pin

16.
17.

736-0204
712-3004A

Flat Washer.344 ID x.62 OD

40.

712-0798

Hex Nut 3/8-16

18.

784-0191

Hex Flange Lock Nut 5/16-18
Retainer Bracket

41.
42.

710-3038
686-0043A

Tine Shield Bracket Assembly

19.

712-0379

Flange Lock Nut 3/8-24

43.

786-0120

20.

750-0885A

Spacer.322 ID x.625 OD

44.

786-0077

Depth Stake
Shield Bracket-

21.

784-0190

22.
23.

710-0189
786-0109

Handle Adjustment Crank
Hex Screw 5/16-18 x 3.0

45.
46.

710-3097
714-0147

Carriage Bolt 3/8-16 x 1.0
Cotter Pin

47.

746-0916

Clutch Cable

24.

786-0108

Handle Mounting Bracket-

End Cover Assembly
Side Shield

Hex Cap Screw 5/16-18 x.875

NOTE: For painted parts, please refer to the list of color codes below. Please add the applicable color code, wherever needed,
to the part number to order a replacement part. For instance, if a part numbered 700-xxxx is painted Oyster Gray, the part
number to order would be 700-xxxx-0662.
Black -- 0691 ; Black, Powder-- 0637; Blue, Midnight -- 0667; Charcoal -- 0483; Grey -- 0648;
Grey, Oyster -- 0662; Orange -- 0606; Red -- 0650; Red, MTD -- 0638; Silver-- 0629; Yellow -- 0674.

ModelSeries420
4

]
Ii

]

]
]

ModelSeries420
Ref,
No.

Part No.

Ref.
No.

Part Description

Part No.

Part Description

710-1017
786-0131

Tap Screw 1/4-14 x.625
Handle Cover w/o Throttle

28.
29.

686-0048
710-3097

Handle Pivot Bracket Assembly

2.
3.

746-0916

Clutch Cable

30.

686-0071

Handle Bracket Assembly

720-0278A

Foam Grip

31.

712-0421

647-0014

Clutch Control Assembly

32.

735-0127

Wing Nut
Rubber Washer.33 ID x.87 OD

735-0246
710-0896

33.
34.

736-0204
714-0104

Flat Washer.344 ID x.62 OD

End Plug
Hex Washer Screw 1/4-14 x.625

649-0016
786-0118

35.
36.

786-0090
710-3005

Side Shield

Handle Assembly
Return Bracket - LH

10.

786-0098

Return Bracket - RH

37.

736-0117

11.

720-0210A

Knob

39.

710-3008

12.

712-3008

Jam Nut 3/8-16

40.

738-0849

13.

747-0902

Shift Control

41.

786-0113

14.

747-0901

15.

714-3021

Handle Adjustment Rod
Cotter Pin

42.
43.

786-0085
686-0044A

16.

712-0386A

Slotted Hex Nut 5/8

44.

747-0432

17.

736-0317

Bell Washer.64 ID x 1.25 OD

45.

726-0106

18.

712-0375

Hex Lock Nut 3/8-16

46.

786-0076

Cap Nut
Shield Bracket RH

19.

726-0330

Cable Clip

47.

786-0077

Shield Bracket - LH

20.

732-0493

Torsion Spring

48.

710-0376

21.

748-0375

Handle Swing Link

49.

714-0147

Hex Cap Screw 5/16-18 x 1.0
Cotter Pin

22.

712-0379
784-0191

50.
51.

711-0415
686-0043A

Clevis Pin

23.

Flange Lock Nut 3/8-24
Retainer Bracket

24.

712-3004A

Hex Flange Lock Nut 5/16-18

52.

710-3038

25.

784-0190

Handle Adjustment Crank

53.

712-0798

Hex Cap Screw 5/16-18 x.875
Hex Nut 3/8-16

26.

710-0521

Hex Cap Screw 3/8-16 x 3.0

54.

736-0169

Lock Washer 3/8

27.

710-0189

Hex Cap Screw 5/16-18 x 3.0

55.

786-0120

Depth Stake

Carriage Bolt 3/8-16 x 1.0

Cotter Pin
Hex Cap Screw 3/8-16 x 1.25
Flat Washer.375 ID x.620 OD
Hex Cap Screw 5/16-18 x.75
Hex Screw 5/16-18 x.75
Rear Tine Shield Flap
Tine Shield
End Cover Assembly
Rod

Shield Tine Bracket Assembly

NOTE: For painted parts, please refer to the list of color codes below. Please add the applicable color code, wherever needed,
to the part number to order a replacement part. For instance, if a part numbered 700-xxxx is painted Oyster Gray, the part
number to order would be 700-xxxx-0662.
Black -- 0691 ; Black, Powder -- 0637; Blue, Midnight -- 0667; Charcoal -- 0483; Grey -- 0648;
Grey, Oyster -- 0662; Orange -- 0606; Red -- 0650; Red, MTD -- 0638; Silver -- 0629; Yellow -- 0674.

NOTES

MANUFACTURER'S

LIMITED WARRANTY

The limited warranty set forth below is given by MTD LLC with
respect to new merchandise purchased and used in the
United States, its possessions and territories.
"MTD"warrants this product against defects in material and
workmanship for a period of two (2) years commencing on the
date of original purchase and wilt, at its option, repair or
replace, free of charge, any part found to be defective in
materials or workmanship. This limited warranty shall only
apply if this product has been operated and maintained in
accordance with the Operator's Manual furnished with the
product, and has not been subject to misuse, abuse,
commercial use, neglect, accident, improper maintenance,
alteration, vandalism, theft, fire, water, or damage because of
other peril or natural disaster. Damage resulting from the
installation or use of any part, accessory or attachment not
approved by MTD for use with the product(s) covered by this
manual will void your warranty as to any resulting damage.
Normal wear parts are warranted to be free from defects in
material and workmanship for a period of thirty (30) days from
the date of purchase. Normal wear parts include, but not
limited to items such as: batteries, belts, blades, blade
adapters, grass bags, rider deck wheels, seats, snow thrower
skid shoes, shave plates, auger spiral rubber and tires.
HOW TO OBTAIN SERVICE: Warranty service is available,
WITH PROOF OF PURCHASE, through your local authorized
service dealer. To locate the dealer in your area, check your
Yellow Pages, or contact MTD LLC at P.O. Box 361131,
Cleveland, Ohio 44136-0019, or call 1-800-800-7310 or 1330-220-4683 or tog on to our Web site at
www.mtdproducts.com.
This limited warranty does not provide coverage in the
following cases:
a,

The engine or component parts thereof. These items
may carry a separate manufacturer's warranty. Refer
to applicable manufacturer's warranty for terms and
conditions.
Log splitter pumps, valves, and cylinders have a
separate one year warranty.
Routine maintenance items such as lubricants, filters,
blade sharpening, tune-ups, brake adjustments, clutch
adjustments, deck adjustments, and normal
deterioration of the exterior finish due to use or

FOR:

MTD does not extend any warranty for products sold or
exported outside of the United States, its possessions
and territories, except those sold through MTD's
authorized channels of export distribution.
Replacement parts that are not genuine MTD parts.
Transportation charges and service calls.

No implied warranty, including any implied warranty of
merchantability of fitness for a particular purpose,
applies after the applicable period of express written
warranty above as to the parts as identified. No other
express warranty, whether written or oral, except as
mentioned above, given by any person or entity,
including a dealer or retailer, with respect to any product,
shall bind MTD. During the period of the warranty, the
exclusive remedy is repair or replacement of the product
as set forth above.
The provisions as set forth in this warranty provide the
sole and exclusive remedy arising from the sale. MTD
shall not be liable for incidental or consequential loss or
damage including, without limitation, expenses incurred
for substitute or replacement lawn care services or for
rental expenses to temporarily replace a warranted
product.
Some states do not allow the exclusion or limitation of
incidental or consequential damages, or limitations on how
long an implied warranty lasts, so the above exclusions or
limitations may not apply to you.
In no event shall recovery of any kind be greater than the
amount of the purchase price of the product sold. Alteration
of safety features of the product shall void this warranty.
You assume the risk and liability for toss, damage, or injury to
you and your property and/or to others and their property
arising out of the misuse or inability to use the product.
This limited warranty shall not extend to anyone other than the
original purchaser or to the person for whom it was purchased
as a gift.
HOW STATE LAW RELATES TO THIS WARRANTY: This
limited warranty gives you specific legal rights, and you may
also have other rights which vary from state to state.

IMPORTANT: Owner must present Original Proof of
Purchase to obtain warranty coverage.

exposure.
Service completed by someone other than an
authorized service dealer.

MTD LLC, P.O.BOX361131CLEVELAND,OHIO44136-0019; Phone:1-800-800-7310,1-330-220-4683

Source Exif Data:

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File Type Extension             : pdf
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PDF Version                     : 1.2
Linearized                      : No
Page Count                      : 24
Page Layout                     : SinglePage
Page Mode                       : UseNone
Producer                        : Goby Monitor Application version 3, 2, 1, 4
Create Date                     : Sat Mar 29 01:58:47 2014
Author                          : 
Title                           : 
Subject                         :

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MTD 21AA412A700 User Manual REAR TINE TILLER Manuals And Guides 1109109L

410 Thru 420 1109109L

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