MTD 410 Thru 420 770 10136A User Manual To The A435084a 2a49 A164 Dd03 87502d9444a7

User Manual: MTD 410 Thru 420 to the manual

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Operator’s Manual

Rear Tine Tiller
Models
410 Thru 420 Series

IMPORTANT: Read safety rules and instructions carefully before operating equipment.
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 368022 Cleveland, Ohio 44136-9722.

MTD PRODUCTS INC. P.O. BOX 368022 CLEVELAND, OHIO 44136-9722
PRINTED IN U.S.A.

FORM NO. 770-10136A.fm
(10/99)

TABLE OF CONTENTS
Content

Page

Important Safe Operation Practices................................................................... 3
Assembling Your Tiller ....................................................................................... 5
Know Your Tiller................................................................................................. 8
Operating Your Tiller.......................................................................................... 9
Making Adjustments .......................................................................................... 10
Maintaining Your Tiller ....................................................................................... 11
Service............................................................................................................... 11
Off-Season Storage ........................................................................................... 12
Troubleshooting ................................................................................................. 13
Parts List............................................................................................................ 14

FINDING MODEL NUMBER
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. The information on
the model plate is very important if you need help from our Customer Support Department or
an authorized dealer.
•

You can locate the model number by standing in the operating position behind the unit and looking
down at the center of the rear tine cover. A sample model plate is explained below. For future
reference, please copy the model number and the serial number of the equipment in the space below.

(Model Number)

(Serial Number)

Copy the model number here:

Copy the serial number here:
MTD PRODUCTS INC
CLEVELAND, OHIO 44136

CALLING CUSTOMER SUPPORT
If you have difficulty assembling this product or have any questions regarding the controls, operation or
maintenance of this unit, please call the Customer Support Department.
Call 1- (330) 220-4MTD (4683) or 1- (800)-800-7310 to reach a Customer Support
representative. Please have your unit’s model number and serial number ready when you
call. See previous section to locate this information. You will be asked to enter the serial
number in order to process your call.

SECTION 1: IMPORTANT SAFE OPERATION 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 your tiller. Failure to comply with these
instructions may result in personal injury. When you see this symbol— heed its warning.
WARNING: The Engine Exhaust from this product contains chemicals known to the State of
California to cause cancer, birth defects or other reproductive harm.

DANGER: Your tiller 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 tiller is capable of amputating hands and feet. Failure to observe the following safety
instructions could result in serious injury or death.

GENERAL OPERATION
•

•

•
•

•

•
•
•

•

Read this operator’s manual carefully in its entirety
before attempting to assemble this machine. Read,
understand, and follow all instructions on the
machine and in the manual(s) before operation. Be
completely familiar with the controls and the proper
use of the machine before operating it. Keep this
manual in a safe place for future and regular
reference and for ordering replacement parts.
Your tiller is a powerful tool, not a plaything.
Therefore, exercise extreme caution at all times.
Your unit has been designed to perform one job: to
till soil. Do not use it for any other purpose.
Never allow children under age 14 to operate the
unit. Children 14 years and older should only
operate the unit under close parental supervision.
Only responsible individuals who are familiar with
these rules of safe operation should be allowed to
use your unit.
Do not operate tiller while under the influence of
alcohol or drugs.
Keep the area of operation clear of all persons,
particularly small children and pets. Stop the engine
when they are in the vicinity of your tiller.
Wear sturdy, rough-soled work shoes and close
fitting slacks and shirt. Shirt and slacks that cover
the arms and legs and steel-toed shoes are
recommended. Do not wear loose fitting clothes or
jewelry and secure hair so it is above shoulder
length. They can be caught in moving parts. Never
operate a unit in bare feet, sandals or sneakers.
Operate tiller only in daylight or good artificial light.
Do not start tiller unless the shift lever (if provided)
is in the neutral (N) position.
Do not allow anyone to stand or walk in front of tiller
when starting or running engine.

•

•
•

•

•
•
•

•

Do not place feet or hands on or near the tines
when starting the engine or while the engine is
running.
Never attempt to make depth bar, tine width, cable,
handle, or wheel adjustments while the engine is
running.
Do not leave the tiller unattended with the engine
running.
Before attempting to remove rocks, bricks and
other objects from tines, stop the engine and be
sure the tines have stopped completely. Disconnect
the spark plug wire and move it away from the
spark plug.
If your machine should start making an unusual
noise or vibration, immediately stop the engine and
allow the machine to come to a complete stop.
Disconnect the spark plug wire and move it away
from the spark plug. Take the following steps:
Inspect for damage.
Repair or replace any damaged parts.
Check for any loose parts and tighten to assure
continued safe operation.
Muffler and engine become hot and can cause a
burn. Do not touch.
Keep all shields, guards and safety devices in place
and operating properly.
Use caution when tilling near fences, buildings and
underground utilities. Rotating tines can cause
damage or injury.
Do not operate engine if air cleaner or cover over
carburetor air intake is removed, except for
adjustment. Removal of such parts could create a
fire hazard.
Only use accessories approved for this machine by
the manufacturer. Read, understand, and follow all
instructions provided with the approved accessory.
If situations occur which are not covered by this
manual, use care and good judgment. Contact your
dealer for assistance.

CHILDREN
•

•

•
•

•

Tragic accidents can occur if the operator is not
alert to the presence of small children. Children are
often attracted to the tilling activity. Never assume
that children will remain where you last saw them.
Keep children out of the work area and under the
watchful eye of a responsible adult other than the
operator.
Be alert and turn the unit off if a child enters the
area.
Never allow children under the age of 14 to operate
the tiller.

•

SERVICE
•

•

•
•

Use extreme care in handling gasoline and other
fuels. They are extremely flammable and the
vapors are explosive.
Store fuel and oil in approved containers, away
from heat and open flame, and out of the reach of
children. Check and add fuel before starting the
engine. Never remove gas cap or add fuel while the
engine is running. Allow engine to cool at least two
minutes before refueling.
Replace gasoline cap securely and wipe off any
spilled gasoline before starting the engine as it may
cause a fire or explosion.
Extinguish all cigarettes, cigars, pipes and other
sources of ignition.
Never refuel unit indoors because flammable
vapors will accumulate in the area.

•

•
•
•

Never store the machine or fuel container inside
where there is an open flame or spark such as a
gas hot water heater, space heater, clothes dryer or
furnace.
Never run your machine in an enclosed area as the
exhaust from the engine contains carbon
monoxide, which is a odorless, tasteless and
deadly poisonous gas.
To reduce fire hazard, keep engine and muffler free
of leaves, grass, and other debris build-up. Clean
up fuel and oil spillage. Allow unit to cool at least 5
minutes before storing.
Before cleaning, repairing, or inspecting, make
certain the tines and all moving parts have stopped.
Disconnect the spark plug wire and keep wire away
from spark plug to prevent accidental starting. Do
not use flammable solutions to clean air filter.
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.
Keep all nuts, bolts, and screws tight to be sure the
equipment is in safe working condition.
Never tamper with safety devices. Check their
proper operation regularly.
Do not alter or tamper with the engine’s governor
setting. The governor controls the maximum safe
operating speed of the engine. Overspeeding the
engine is dangerous and will cause damage to the
engine and to other moving parts of the machine.

WARNING — YOUR RESPONSIBILITY: Restrict

the use of this power machine to persons who
read, understand and follow the warnings and instructions in this manual and on the machine.

SECTION 2: ASSEMBLING YOUR TILLER
This instruction manual covers several different model
tillers. Follow only those instructions which pertain to
your unit.

•
•

To Remove Unit From Carton
•

•
•
•
•
•

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

•

•
•

•

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. Insert the
depth stake assembly in the slot (under the tine
shield) and up through the tine shield assembly as
shown in Figure 1.
Insert clevis pin through the tine shield and depth
stake assemblies. Secure with hairpin clip.
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. See Figure 1.
Tighten securely.
Tip the tiller back down so it rests on the tines.

IMPORTANT: The Engine is shipped WITHOUT

Attaching the Handle Assembly

GASOLINE or OIL. After assembly, see separate
engine manual for proper fuel and engine oil
recommendations.

•

NOTE: Left and right is determined from the operator’s
position, standing behind the tiller.

•

Loose Parts In Carton
(1)
(1)
(1)
(1)

Depth Stake
Handle Assembly
Shift Rod
Handle Adjustment Rod (Model 420 series only)

Remove the handle adjustment lock, 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.

Flange Nut Retainer Bracket
Shoulder Bolt
Lock Nut
Handle Adjustment
Lock
Flange Nut

NOTE: All hardware needed for assembly is attached
to the loose parts or the tiller.

Attaching The Depth Stake Assembly
T-Knob, Flat Washer, Hex Bolt
Tine Shield
Hinge Flap

Pivot Bracket
Figure 2
•

Clevis Pin
Hairpin Clip

Depth Stake
Figure 1
5

Lift up the handle assembly and align the bottom
holes in the handle assembly with the holes in the
pivot bracket. Insert hex bolt (with hex nut retainer
attached through the round hole). The head of hex
bolt, flange nut retainer bracket should be to the
right hand side of the unit. See Figure 3.

Flange Nut Retainer Bracket
Shoulder Bolt
Lock Nut

T-Handles

Lift up
Handle

Gear Shift
Rod

Handle
Adjustment Rod
(Model 420 series only)
Figure 5
Figure 3
•

Place the hex opening of the flange nut retainer
bracket over the flange nut securing the handle
adjustment lock and install the lock nut on the lower
shoulder bolt. See Figure 4.

Hex Hole in
Retainer Bracket
over Flange Nut

Gear Shift Rod
Opening

Shift Cover

Handle Adjustment
Lock

Rubber Washer
Flat Washer
Hairpin Clip

Figure 6
•

Install the nut and T-handle on the gear shift rod.

Attaching The Handle Adjustment Rod
(Model 420 series only)
Figure 4
•

Pivot handle assembly into position desired.
Tighten the bottom bolt and nut securely. Tighten
the handle adjustment lock.
Handle
Adjustment
Rod

Attaching The Gear Shift Rod
NOTE: Model 420 series tiller has two control rods. The
gear shift rod is the longer rod.
•

•

Positioner
Bracket

Remove the T-handle, nut, hairpin clip, flat washer
and rubber washer from the end of the gear shift
rod. Slide the rod up through the bracket on the
front of the handle assembly (use the right hand
hole for Model 420 series). 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. See Figure 6. Secure with rubber
washer first, then flat washer and hairpin clip.

Rubber
Washer

Hairpin
Clip

Figure 7
•

Remove the T-handle, nut, hairpin clip, and rubber
washer from the ends of the handle adjustment rod.
Slide the rod up through the left side of the bracket
on the front of the handle assembly. Refer to Figure
5.

•

Slide the rubber washer on the unthreaded end of
the handle adjustment rod. Insert the end of the
handle adjustment rod into the positioner bracket
beneath the handle, on top of the tine shield. See
Figure 7. Secure with hairpin clip.
Reinstall the nut and T-handle.

NOTE: Do not overtighten control wire. Too much
tension may cause it to break.

Final Clutch Adjustment
IMPORTANT: Service the engine with oil and gasoline
before checking this adjustment. Refer to the separate
engine manual packed with your tiller.

Attaching The Clutch Cable

•

Handle
Adjustment
Lock

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.

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

Cable
Clip

•

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. See Figure 9. Tighten the upper hex nut
against the bracket.
• 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 control cable).

Flange Lock Nut
Figure 8
•

Route the clutch cable underneath the handle and
through the cable clip. Be careful not to bend or
kink the cable. Refer to Figure 8. Remove one hex
nut from the threaded casing on the end of the
cable. See Figure 9.

Hex
Nuts

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.

Lock
Washer

Tire Pressure
Slot in
Cable
Bracket

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).

“Z” End
of Cable

Figure 9 Viewed beneath handle panel.
•

•

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.
Pull the cable upwards to obtain slack, and, from
right to left, hook the “Z” end of the cable into the
bracket on the clutch control (beneath the handle
panel) as shown in Figure 9. Tighten the nut
against the cable bracket.

WARNING: Maximum tire pressure under
any circumstances is 30 p.s.i. Equal tire
pressure should be maintained on both
tires.

SECTION 3: KNOW YOUR TILLER
WARNING: Make certain unit is
NEUTRAL when starting the engine.

Gear Selection
Handle

Clutch Handle - (Bail)
Handle Height
Adjustment
Lock

The clutch handle (bail) is located beneath the handle.
See Figure 10. Squeezing the clutch handle against the
handle engages the wheel and tine drive mechanisms.

Handle
Clutch
Adjustment
Handle
(Side to Side)
(Bail)
(Model 420 series
only)

Throttle Control (All Engines)
The throttle control lever is located on the engine. It
controls the engine speed and stops the engine. See
Figure 11.

Choke Lever (Brigg & Stratton Standard and Intek Engines)

Depth
Stake

The choke lever is located by the throttle. It is used to
enrich the fuel mixture in the carburetor when starting a
cold engine. See Figure 11.

Figure 10

Primer Button (Tecumseh Engine Only)

Gear Selection Handle

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. See Figure 11.

The gear selection handle is located on the front of the
handle assembly (right hand handle on Model 420
Series). It is used to select NEUTRAL, REVERSE, or
one of the FORWARD modes.

Depth Stake
The depth stake controls the tilling depth. Refer to
‘‘Setting the Depth’’ on page 10.

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 10.

Handle Adjustment (See Figure 10)
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.

NOTE: If difficulty is encountered in moving the gear
selection handle, refer to following helpful hints. To shift
into forward or reverse wheel drive, move tiller forward
slightly, then backward, to allow the gears to
synchronize.

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.

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.

Fuel Shut-Off Valve (Briggs & Stratton Intek Engine if
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.

REVERSE—Reverse wheel drive only.
NEUTRAL—Transmission is in neutral.
FORWARD Modes:
Wheels Forward— Forward wheel drive only.
Tines Reverse— Forward wheel drive and reverse tine
drive.

SECTION 4: OPERATING YOUR TILLER
NOTE: Engine is shipped without oil.

•

Before Starting
•
•

•

Service engine with oil as instructed in the
separate engine manual packed with your unit.
Fill fuel tank with clean, fresh, lead-free.

•
•

To Start Engine
NOTE: When pushing the unit with the engine off, you
will hear a ratcheting sound (gear noise) which is
normal.
WARNING: Be sure no one is standing in
front of the tiller while the engine is
running or being started.

Tecumseh Engines
•
•

Briggs and Stratton Standard
•
•
•

•

Place gear selection lever in NEUTRAL.
Place the throttle control lever in FAST position.
See Figure 11.
Move choke lever to CHOKE position.

•
Choke

Stop

Place gear selection lever in NEUTRAL.
Place the engine speed control in the START
position.
Push primer two (2) or three (3) times (see Figure
11). Wait about two (2) seconds between each
push.

NOTE: Primer may not be needed to restart a warm
engine after a short shutdown.

NOTE: A warm engine may not require choking.

Run

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 steps 4 and 5 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.
Refer to engine manual for additional engine
information.

Fast

•

Stand at side of tiller. Grasp the starter handle and
pull out slowly, until it pulls slightly harder. Let rope
rewind slowly.
Pull rope with a rapid full arm stroke. Do not allow
handle to snap back. Allow it to rewind slowly while
keeping a firm hold on the starter handle.

NOTE: If engine fails to start after three (3) pulls, push
primer two (2) times and pull starter rope again.

Fuel Shut-Off

Briggs and Stratton Intek

•

Choke

Repeat steps 4 and 5 until engine starts. Refer to
engine manual for additional engine information.

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.

To Stop Engine

Throttle Control
Briggs and Stratton Standard

•
•

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

Air
Cleaner
Primer
Fast

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

WARNING: When operating the tiller for
the first time, use the depth stake setting
that gives 1 inch of tilling depth (second
hole from the top). Refer to Figure 12.

Throttle
Control

Stop

Tecumseh
Figure 11
9

Setting The Depth

depth stake and side shields and make one or two
more passes over the area.
• When tilling loose soil, 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.
• To transport tiller, lower the depth stake (use top
adjustment hole).
To adjust the depth stake, remove the clevis pin and
hairpin clip. See Figure 12. Move the depth stake to the
desired setting. Secure with the clevis pin and hairpin
clip.
To adjust the side shields, remove the wing nuts. See
Figure 13. Move the side shield to the desired position.
Replace the wing nuts. Tighten securely.

Tilling depth is controlled by the depth stake which can
be adjusted to five different settings. See Figure 12.
Adjust the side shields as shown in Figure 13, as you
adjust the depth stake. Be certain spark plug wire is
disconnected and grounded against the engine.
•

When using the tiller for the first time, use the
second adjustment hole from the top (1" of tilling
depth). See Figure 12.
Use This
Position
First Time

Transport
Position
1"
Clevis
Pin

Operating the Tiller

Hairpin
Clip

•
•
•

5"
7"

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. Refer to “Know Your Tiller”
section on page 8.

Figure 12

•
Use This
Hole for
Lowest (Shallowest)
Position

Select the depth stake setting.
Start engine as instructed on page 9.
Move gear selection handle to one of the forward
modes or reverse.

Side
Shields

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

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.
WARNING: Do not push down on the
handles so that the wheels are lifted off the
ground while using the tine drive, or the
tiller could move backward and cause
personal injury.

Use This Hole for
Highest (Deepest)
Position
Figure 13
•

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

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

SECTION 5: MAKING ADJUSTMENTS
Handle Adjustment

Belt Tension Adjustment

The handle height may be adjusted. 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 on page 8 for details of handle
adjustment.

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.
10

To adjust the tension on the belt, refer to final clutch
adjustment in Assembly Instructions.

Be careful of heated surfaces and muffler.
Never make unnecessary adjustments. The factory
settings are correct for most applications. If
adjustments are needed, refer to the separate engine
manual packed with your tiller.

Carburetor Adjustment
WARNING: If any adjustments are made to
the engine while the engine is running,
(e.g. carburetor), disengage all clutches
and tines. Keep clear of all moving parts.

SECTION 6: SERVICE
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. Assemble the left half
to it. This grease can be obtained at your nearest
authorized dealer. Order part number 737-0300.

Clutch Handle—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.
Tine Shafts—Remove tine assemblies and lubricate
the tine shafts at least once a season.
Wheel Shafts—Remove wheel assemblies and
lubricate the axle shafts at least once a season.

SECTION 7: MAINTAINING YOUR TILLER
Cleaning The Tine Area

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

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.

Engine
Refer to the separate engine manual for engine
maintenance instructions.

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.

Maintain engine oil as instructed in the separate
engine manual packed with your unit. Read and follow
instructions carefully.
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.

Tires
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.

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

When installing a tire to the rim, be certain rim is clean
and free of rust. Lubricate both the tire and rim
generously. Never inflate to over 30 p.s.i. to seat beads.

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.

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.

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.

Belt Replacement

•

CAUTION: Do not use an off-the-shelf
belt.

Remove belt. Reassemble new belt, following
instructions in reverse order.

NOTE: Upon reassembly, make certain the belt is
routed over the idler pulley and inside of belt keepers by
engine pulley. See Figure 14.

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.

Engine
Pulley

Belt Keeper

If belt replacement is required, order belt or belts by
part number from your nearest authorized dealer.
Part No. 754-0438—‘‘V’’ Belt
•
•
•
•

•

Disconnect and ground the spark plug wire against
the engine.
Remove the belt cover from the left side of the tiller
as follows:
Remove two torx head screws from the top of belt
cover.
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 14.

Hex Bolts

Belt
Keeper

Idler
Pulley
Figure 14

SECTION 8: OFF-SEASON STORAGE
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.
•

•

•
•
•

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, especially any springs,
bearings and cables.

SECTION 9: TROUBLE SHOOTING GUIDE
Trouble

Possible Cause(s)

Corrective Action

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.
Move throttle lever to start position.

Engine runs
erratic

Engine overheats

Tines do not
engage

Wheels do not
engage

Throttle control lever not in correct
starting position (if so equipped).
Blocked fuel line.
Dirty aircleaner.
Choke not in ON position.
Spark plug wire disconnected.
Faulty spark plug.
Engine flooded.
Unit running on CHOKE.
Spark plug wire loose.
Blocked fuel line or stale fuel.
Vent in gas cap plugged.
Water or dirt in fuel system.
Dirty air cleaner.
Carburetor out of adjustment.
Engine oil level low.
Dirty air cleaner.
Air flow restricted.
Carburetor not adjusted properly.
Foreign object lodged in tines.
Tine clevis pin(s) missing.
Pulley and idler not in correct
adjustment.
Not shifting properly.
Control cable not adjusted properly.
Belt worn and/or stretched.
Clevis pin missing.
Tiller is not being shifted properly.
Control cable not adjusted properly.
Belt worn and/or stretched.

Clean fuel line.
Refer to the engine manual packed with your unit.
Move switch to ON position.
Connect wire to spark plug.
Clean, adjust gap or replace.
Refer to the engine manual packed with your unit.
Move choke lever to OFF position.
Connect and tighten spark plug wire.
Clean fuel line; fill tank with clean, fresh gasoline. Fuel will
not last over thirty days unless a fuel stabilizer is used.
Clear vent.
Drain fuel tank. Refill with fresh fuel.
Refer to the engine manual packed with your unit.
Refer to the engine manual packed with your unit.
Fill crankcase with proper oil.
Refer to the engine manual packed with your unit.
Refer to the engine manual packed with your unit.
Adjust carburetor as instructed in separate engine manual.
Dislodge foreign object.
Replace tine clevis pin(s).
Take unit to authorized service dealer.
Refer to controls section of operator’s manual for proper
shifting procedures.
Adjust control cable (see assembly instructions).
Replace belt.
Replace clevis pin.
Refer to controls section of operator’s manual for proper
shifting procedures.
Adjust control cable (see assembly instructions).
Replace belt.

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

Models 410 Series

REF.
NO.

PART
NO

1
2
3

735-0246
647-0014
710-1017

4
5
6
7
8
9
11
12
13
14
15
16
17
21
22
23
24
28
29
30
31
32

786-0131
786-0098
786-0118
720-0278A
720-0210A
712-3008
735-0127
736-0204
747-0902
714-0104
649-0017
710-0896
726-0330
746-0916
786-0120
736-0117
710-0253
715-0120
686-0095
711-0415
714-0149B
642-0015
642-0016

DESCRIPTION

REF.
NO.

Vinyl End Plug
Clutch Control Ass’y.
Torx Mach. AB-Tap Scr.
1/4 x .62" Lg.
Handle Cover
Retaining Brkt.—R.H.
Retaining Brkt.—L.H.
Grip (2 Req’d.)
Knob
Hex Jam Nut 3/8-16 Thd.
Rubber Washer
Fl-Wash. .344" I.D. x .6" O.D.
Gear Shift Rod
Hairpin Clip
Handle Ass’y.
Tap Scr. 1/4-14 x 5/8" Lg.
Cable Clip
Clutch Cable
Depth Bar
Fl-Wash. 3/8" I.D. x 5/8" O.D.
Hex Bolt 3/8-16 x 1" Lg.*
Spiral Pin 3/16" x 1"
Shift Crank Ass’y.
Clevis Pin
Hairpin Clip
Tine Ass’y.—L.H.
Tine Ass’y.—R.H. (Not Shown)

PART
NO

33
34
35
36
38
39
40
43

786-0090
786-0113
686-0044A
738-0849
710-0376
710-3097
712-0798
712-3004A

44
45
46
47
48
49
50
51

786-0076
786-0077
711-0415
786-0085
747-0432
726-0106
710-0189
786-0101B
786-0168
710-1017
786-0109
786-0108
784-0191
712-0379
750-0885
784-0190
712-0421
736-0169

52
54
55
56
57
58
59
60
61

DESCRIPTION
Side Shield
Rear Tine Shield
End Cover Ass’y.
Hex Cap Bolt 5/16-18 x 1.25"
Hex Bolt 5/16-18 x .75" Lg.
Carriage Bolt 3/8-16 x 1" Lg.
Hex Ins. L-Nut 3/8-16 Thd.
Hex Flange Top L-Nut
5/16-18 Thd.
Tine Shield Brkt.—R.H.
Tine Shield Brkt.—L.H.
Clevis Pin .375" Dia.
Tine Shield
Tiller Flap Rod
Cap Speed Nut
Hex Bolt 5/16-18 x 3" Lg.
Shift Cover (410, 412 & 422)
Shift Cover (415 & 417)
Torx Mach. AB-Tap Scr. 1/4 x
Handle Brkt.—L.H.
Handle Brkt.—R.H.
Hex Nut Retainer Brkt.
Hex Flange Nut 3/8-24 Thd.
Spacer .322 Dia.
Handle Adjustment Crank
Knob 5/16-18 Thd.
L-Washer 3/8" I.D.

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.

Models 410 & 420 Series

REF.
NO.

PART NO.

DESCRIPTION

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

710-3008
712-3004A
786-0107
710-1017
738-0899
786-0117
786-0100
736-0142
712-0392
756-0634
736-0105
712-0379
754-0438
686-0031A
736-0119
710-0237
738-0876
712-0266
756-0405
710-1039
736-0217
736-0258
756-0972

Hex Bolt 5/16-18 x .75" Lg.
Hex Top L-Nut 5/16-18 Thd.
Cable Mtg. Bracket
Torx Mach. AB-Tap Scr. 1/4 x .6" Lg
Belt Cover Bolt
Shift Cover Bracket
Belt Cover
Fl-Wash. .281" I.D. x .5" O.D.
Hex Cap Nut 1/4-28 Thd.
Flat Pulley 8" O.D.
Bell-Wash. .38" I.D. x .88" O.D.
Hex Flange Nut.
“V”-Belt
Belt Keeper Brkt.
L-Wash. 5/16" I.D.
Hex Bolt 5/16-24 x .62" Lg.
Shld. Nut
Hex Jam L-Nut 3/8-16 Thd.
Fl-Idler w/Flanges
Hex Bolt 3/8-24 x 1" Lg.
L-Wash. 3/8" I.D.
Fl-Wash. 3/8" I.D. x 1" O.D.
Outer Engine Pulley Half

REF.
NO.

24
25
26
27
28
29
30
31
32

34
35
36
37
38
41
42
43

PART NO.

DESCRIPTION

756-0971
786-0080
710-0723
746-0916
734-0255
714-0104
711-1017
634-0112
634-0108
634-0110
634-0111
634-0106
634-0107
734-1796
734-0808
619-0009
710-1007
710-0376
712-3004A
—
686-0043A
710-3038
736-0256

Inner Engine Pulley Half
Idler Bracket
Hex Bolt 3/8-16 x 1.25" Lg.
Clutch Cable
Air Valve
Hairpin Clip
Clevis Pin
Rim Only (14")
Rim Only (16")
Wheel Ass’y. Comp.—R.H. (14")
Wheel Ass’y. Comp.—L.H. (14")
Wheel Ass’y. Comp.—R.H. (16")
Wheel Ass’y. Comp.—L.H. (16")
Tire Only (14")
Tire Only (16")
Frame Counterweight
Hex TT-Tap Scr. 3/8-16 Thd.
Hex Bolt 5/16-18 x 1" Lg. (Gr. 5)
Hex Flange L-Nut 5/16-18 Thd.
Engine
Tine Shield Brkt. Ass’y.
Hex Bolt 5/16-18 x 7/8" Lg.
Wash. Fl..635 I.D. x .930 O.D. x .03

Models 410 & 420 Series

REF.
NO.

PART NO.

1
2
3
4
5
6
8
9
10
11
12
13
14

721-0295
786-0086
716-0865
750-0938
611-0058
717-1458
736-0351
721-0379
736-0518
686-0039
750-0935
738-0885
750-0936

15
16
17
18
19

617-0004
712-3067
736-0407
712-0378
710-0896

20
21
22
23
24
26
27

732-0863
741-0862
721-0378
736-0163
750-0570
611-0021
713-0226

713-0233

686-0038

DESCRIPTION
Chain Case Gasket
Reinforcement Plate
Snap Ring
Spacer .735" I.D. x .886" O.D.
Wheel Shaft
Spur Gear 46T
Fl-Wash. .76" I.D. x 1.5" O.D.
Shaft Seal
Thr.Wash..445 I.D.x1.92 O.D.x
Gear Case Ass’y. Half—L.H.
Spacer .635" I.D. x 1" O.D. x .78
Jack Shaft 2.06" Lg.
Spacer .635" I.D. x 1" O.D. x
.37" Thk.
Gear Idler Ass’y.
Hex Patch L-Nut 7/16-20 Thd.
Bell-Wash. .45" I.D. x 1" O.D.
Hex Nut 7/16-20 Thd.
Hex Wash. Hd. TT-Tap Scr. 1/4-20
x .5" Lg.
Spring Detent
Ball Detent
Shaft Seal
Thrust Wash. 1.03" I.D. x 1.62"
Spacer 1" I.D. x 2" O.D. x .5" Thk.
Tine Shaft Ass’y.
Chain #50 5/8" Pitch x 52
Links—Endless
Chain—#41 1/2" Pitch x 30
Links—Endless
Gear Case Ass’y. Half—R.H.
17

REF.
NO.

PART NO.

30
31
32
33
35
36
37
38
39
40
41
42
43
44
45
46
47
49
50
51
52
53
55
56
57
58
59
60
61
—

736-0541
617-0002
738-0884
750-0931
717-1411
750-0930
713-0436
717-1405
736-0518
618-0245B
717-1409
736-0442
732-0614
718-0234
716-0235
711-1087
713-0435
717-1451A
736-0336
741-0124
736-0329
710-0258
741-0563
736-0512
686-0094
718-0237
736-0265
726-0331
750-0987
737-0300

DESCRIPTION
Fl-Wash. 7/16" I.D. x 1-3/8" O.D.
Gear and Sprocket Ass’y.
Jack Shaft 5" Lg.
Spacer .636" I.D. x .86" O.D.
Spur Gear 10T
Spacer 1.5" I.D. x 1.76" O.D.
Sprocket—#41 Chain
Reverse Gear 46T
Thrust Wash. .445" I.D. x 1.92"
Shifter Ass’y.
Spur Gear 17T
Fl-Wash. .69" I.D. x 1.06" O.D.
Wire Ring
Clutch Collar
Retaining Ring .875" Shaft
Drive Shaft
Sprocket 11T
Spur Gear 16T
Fl-Wash. 5/8" I.D. x 1" O.D.
Ball Bearing .669" I.D.
L-Wash. 1/4" I.D.
Hex Bolt 1/4-20 x .62" Lg.
Ball Bearing
Fl-Wash. .281" I.D. x .875" O.D.
Gear Case Ass’y. Comp.
Key—Drive Shaft (Not Shown)
Fl-Wash. .88" I.D. x 1.5" O.D.
Button Plug
Spacer 1.52" I.D.
Grease (40 oz. Req’d.)

Model 420 Series

REF.
NO.
1
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
21
22
23
24
28
29
30
31
32
33
34
35
36

PART NO.
735-0246
647-0014
710-1017
786-0131
786-0098
786-0118
720-0278A
720-0210A
712-3008
735-0127
736-0204
747-0902
714-0104
649-0016
710-0896
726-0330
746-0916
786-0120
736-0117
710-0514
715-0120
686-0095
711-0415
714-0149B
642-0015
642-0016
786-0090
786-0113
686-0044A
738-0849

REF.
NO.

DESCRIPTION
Vinyl End Plug
Clutch Control Ass’y.
Torx Mach. AB-Tap Scr.
Handle Cover
Retaining Brkt.—R.H.
Retaining Brkt.—L.H.
Grip (2 Req’d.)
Knob
Hex Jam Nut 3/8-16 Thd.
Rubber Washer
Fl-Wash. .344" I.D. x .6" O.D.
Gear Shift Rod
Hairpin Clip
Handle Ass’y.
Tap Scr. 1/4-14 x 5/8" Lg.
Cable Clip
Clutch Cable
Depth Bar
Fl-Wash. 3/8" I.D. x 5/8" O.D.
Hex Bolt 3/8-16 x 1" Lg.*
Spiral Pin 3/16" x 1"
Shift Crank Ass’y.
Clevis Pin
Hairpin Clip
Tine Ass’y.—L.H.
Tine Ass’y.—R.H. (Not Shown)
Side Shield
Rear Tine Shield
End Cover Ass’y.
Hex Screw 5/16-18 x .75" Lg.

PART NO.

38
39
40
43
44
45
46
47
48
49
50
51
52

710-3008
710-3097
712-0798
712-3004A
786-0076
786-0077
711-0415
786-0085
747-0432
726-0106
710-0521
786-0101B
710-1017

54
55
56
57
59
60
61
62
63
64
65
66
67
68
69

686-0071
686-0048
784-0191
712-0379
784-0190
710-0189
732-0493
712-0375
748-0375
736-0317
712-0386A
714-3021
747-0901
712-0421
736-0169

DESCRIPTION
Hex Bolt 5/16-18 x .75" Lg.
Carriage Bolt 3/8-16 x 1" Lg.
Hex Nut 3/8-16 Thd.
Hex Fl. Tp. L-Nut 5/16-18 Thd.
Tine Shield Brkt.—R.H.
Tine Shield Brkt.—L.H.
Clevis Pin .375" Dia.
Tine Shield
Tiller Flap Rod
Cap Speed Nut
Hex Bolt 3/8-16 x 3" Lg.
Shift Cover
Torx Mach. AB-Tap Scr.
1/4 x .6"
Handle Positioner Brkt. Ass’y.
Handle Pivot Brkt. Ass’y.
Hex Nut Retainer Brkt.
Hex Flange Nut 3/8-24 Thd.
Handle Adjustment Crank
Hex Bolt 5/16-18 x 3" Lg.
Torsion Spring
Hex L-Nut 3/8-16 Thd.
Handle Swing Link
Bell-Wash. 5/8" I.D.
Hex Slotted Nut 5/8-18 Thd.
Cotter Pin 1/8" x 1-5/8"
Handle Adjustment Rod
Knob 5/16-18 Thd.
L-Washer 3/8" I.D.

MANUFACTURER’S LIMITED WARRANTY FOR:

The limited warranty set forth below is given by MTD
PRODUCTS INC (“MTD”) 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 will, at its option, repair or
replace, free of charge, any part found to be defective in
material 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 accessory or attachment not
approved by MTD Products Inc. for use with the product(s)
covered by this manual will void your warranty as to any
resulting damages.
Normal wear parts or components thereof are subject to
separate terms as follows: All normal wear part or component failures will be covered on the product for a period of
90 days regardless of cause. After 90 days, but within the
two year period, normal wear part failures will be covered
ONLY IF caused by defects in material or workmanship of
OTHER component parts. Normal wear parts and components include, but are not limited to, belts, blades, blade
adapters, grass bags, rider deck wheels, seats, snow
thrower skid shoes, shave plates and tires. Batteries are
covered by a 90-day limited replacement warranty.
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, please check for a listing in the Yellow
Pages or contact the Customer Service Department of
MTD PRODUCTS INC by calling 1-800-800-7310 or writing to P.O. Box 368022, Cleveland, Ohio 44136-9722.
This limited warranty does not provide coverage in the
following cases:
a. The engine or component parts thereof. These items
carry a separate manufacturer’s warranty. Please
refer to the applicable manufacturer’s warranty on
these items.
b. Log splitter pumps, valves and cylinders have a separate one year warranty.

c. Routine maintenance items such as lubricants, filters,
blade sharpening and tune-ups, or adjustments such
as brake adjustments, clutch adjustments or deck
adjustments; and normal deterioration of the exterior
finish due to use or exposure.
d. MTD does not extend any warranty for products sold
or exported outside of the United States of America,
its possessions and territories, except those sold
through MTD’s authorized channels of export distribution.
No implied warranty, including any implied warranty of
merchantability or 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 or guaranty, 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. (Some states do not
allow limitations on how long an implied warranty lasts, so
the above limitation may not apply to you.)
The provisions as set forth in this Warranty provide the
sole and exclusive remedy arising from the sales. MTD
shall not be liable for incidental or consequential loss
or damages including, without limitation, expenses
incurred for substitute or replacement lawn care services, for transportation or for related expenses, or for
rental expenses to temporarily replace a warranted
product. (Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above
exclusion or limitation 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 the safety features of the product shall void this Warranty. You assume the risk and liability for loss, damage, or
injury to you and your property and/or to others and their
property arising out of the use or misuse or inability to use
the product.
This limited warranty shall not extend to anyone other than
the original purchaser, original lessee or 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.

Source Exif Data:

File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.3
Linearized                      : No
Create Date                     : 1999:10:08 08:45:13
Producer                        : Acrobat Distiller 4.0 for Windows
Creator                         : AdobePS5.dll Version 5.0.1
Title                           : 770-10136A.fm
Modify Date                     : 1999:10:08 09:31:32Z
Page Count                      : 20

EXIF Metadata provided by EXIF.tools

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