MTD 522, 525, 524, 521, 523 Operator's Manual

OPERATOR'S MANUAL

22" Self-Propelled

Mower

Model Series

520 Thru 530

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 forest*

covered, 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 Califorffla 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, OHIO 44136-0019

PRINTED IN U.S.A.

FORM NO. 770-10349B

(11/01)

TABLEOFCONTENTS

Content Page

Maintaining Safety ............................................................................................. 3

Slope Gauge ...................................................................................................... 6

Assembling Your Lawn Mower ........................................................................... 7

Know Your Lawn Mower .................................................................................... 8

Operating Your Lawn Mower ............................................................................. 9

Making Adjustments .......................................................................................... 10

Maintaining Your Lawn Mower ........................................................................... 11

Storing Your Lawn Mower .................................................................................. 13

Troubleshooting ................................................................................................. 14

Parts List ............................................................................................................ 16

FINDINGMODELNUMBER

This Operator's Manual is an important part of your new lawn mower. It wilt 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 looking down at the rear of the deck. 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.

Copy the model number here:

ENGINEINFORMATION

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.

CALLINGCUSTOMERSUPPORT

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.

SECTION1: IMPORTANTSAFEOPERATIONPRACTICES

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 to cause cancer

and birth defects or other reproductive harm.

DANGER: 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.

GeneralOperation

1. 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 this
machine before operating it. Keep this manual in a safe
place for future and regular reference and for ordering
replacement parts.

2. This machine is a precision piece of power equipment,
not a plaything. Therefore, exercise extreme caution at all
times. Your unit has been designed to perform one job: to
mow grass. Do not use it for any other purpose.

3. 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. Only responsible individuals who are familiar with
these rules of safe operation should be allowed to use

this machine.

4. Thoroughly inspect the area where the equipment is to
be used. Remove all stones, sticks, wire, bones, toys and
other foreign objects which could be tripped over or
picked up and thrown by the blade. Thrown objects can
cause serious personal injury. Plan your mowing pattern
to avoid discharge of material toward roads, sidewalks,
bystanders and the like. Also, avoid discharging material
against a wall or obstruction which may cause
discharged material to ricochet back toward the operator.

5. To help avoid blade contact or a thrown object injury, stay
in the operator zone behind the handles and keep
children, bystanders, helpers and pets at least 75 feet
from the mower while it is in operation. Stop machine if
anyone enters the area.

6. Always wear safety glasses or safety goggles during
operation and while performing an adjustment or repair to
protect your eyes. Thrown objects which ricochet can
cause serious injury to the eyes.

7. Wear sturdy, rough-soled work shoes and close-fitting
slacks and shirts. Shirts and pants that cover the arms
and legs and steel-toed shoes are recommended. Never
operate this machine in bare feet, sandals, slippery or
light weight (e.g. canvas) shoes.

19.

3

8. Do not put hands or feet near rotating parts or under the
cutting deck. Contact with the blade can amputate hands

and feet.

9. A missing or damaged discharge cover can cause blade
contact or thrown object injuries.

10. Many injuries occur as a result of the mower being pulled
over the foot during a fall caused by slipping or tripping.
Do not hold on to the mower if you are falling; release the
handle immediately.

11. Never pull the mower back toward you while you are
walking. Ifyou must back the mower away from a wall or
obstruction first look down and behind to avoid tripping
and then follow these steps:

a. Step back from the mower to fully extend your

arms.

b. Be sure you are well balanced with sure footing.

c. Pull the mower back slowly, no more than half way

toward you.

d. Repeat these steps as needed.

12. Do not operate the mower while under the influence of
alcohol or drugs.

13. Do not engage the self-propelled mechanism on units so
equipped while starting engine.

14. The blade control handle is asafetydevice. Never
attempt to bypass its operation. Doing so makes the
safety device inoperative and may result in personal
injury through contact with the rotating blade. The blade
control handle must operate easily in both directions and
automatically return to the disengaged position when

released.

15. Never operate the mower in wet grass. Always be sure of
your footing. A slip and fall can cause serious personal
injury. If you feel you are losing your footing, release the
blade control handle immediately and the blade will stop
rotating within three seconds.

16. Mow only in daylight or in good artificial light. Walk, never
run.

17. Stop the blade when crossing gravel drives, walks or
roads.

18. If the equipment should start to vibrate abnormally, stop
the engine and check immediately for the cause.
Vibration is generally awarning of trouble.
Shut the engine off and wait until the blade comes to a

completestopbeforeremovingthegrasscatcheror
uncloggingthechute.Thecuttingbladecontinuesto
rotateforafewsecondsaftertheengineisshutoff.Never
placeanypartofthebodyinthebladeareauntilyouare
surethebladehasstoppedrotating.

20.Neveroperatemowerwithoutpropertrailshield,
dischargecover,grasscatcher,bladecontrolhandleor
othersafetyprotectivedevicesinplaceandworking.
Neveroperatemowerwithdamagedsafetydevices.
Failuretodoso,canresultinpersonalinjury.

21.Mufflerandenginebecomehotandcancauseaburn.Do
nottouch.

22.Only use parts and accessories made for this machine by

the manufacturer. Failure to do so, can result in personal
injury.

23. If situations occur which are not covered in this manual,
use care and good judgment. Contact your dealer for

assistance. Telephone [phone] for the name of
your nearest dealer.

SlopeOperation

Slopes are a major factor related to slip and fall accidents
which can result in severe injury. Operation on slopes
requires extra caution. If you feel uneasy on a slope, do not
mow it. For your safety, use the slope gauge included as part
of this manual to measure slopes before operating this unit on
a sloped or hilly area. If the slope is greater than 15 degrees,

do not mow it.

Do:

1. Mow across the face of slopes; never up and down.
Exercise extreme caution when changing direction on
slopes.

2. Watch for holes, ruts, rocks, hidden objects, or bumps
which can cause you to slip or trip. Tall grass can hide

obstacles.

3. Always be sure of your footing. A slip and fall can cause
serious personal injury. If you feel you are losing your
balance, release the blade control handle immediately,
and the blade will stop rotating within 3 seconds.

DONot:

1. Do not mow near drop-offs, ditches or embankments, you
could lose your footing or balance.

2. Do not mow slopes greater than 15 degrees as shown on
the slope gauge.

3. Do not mow on wet grass. Unstable footing could cause
slipping.

Children

Tragic accidents can occur ifthe operator is not alert to the
presence of children. Children are often attracted to the
mower and the mowing activity. They do not understand the
dangers. Never assume that children will remain where you

last saw them.

1. Keep children out of the mowing area and under the
watchful care of a responsible adult other than the
operator.

2. Be alert and turn mower off if a child enters the area.

3. Before and while moving backwards, lookbehind and
down for small children.

4. Use extreme care when approaching blind corners,

5.

6.

doorways, shrubs, trees, or other objects that may
obscure your vision of a child who may run into the

mower.

Keep children away from hot or running engines. They

can suffer burns from a hot muffler.

Never allow children under 14 years old to operate a
power mower. Children 14 years old and over should
read and understand the operation instructionsand
safety rules in this manual and should be trained and
supervised by a parent.

Service

Safe Handling Of Gasoline:

1. 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 spilled on
yourself or your clothes which can ignite.

2. Wash your skin and change clothes immediately.

3. Use only an approved gasoline container.

4. Never fill containers inside avehicle or on a truck or
trailer bed with a plastic liner. Always place containers on

the ground away from your vehicle before filling.

5. When practical, remove gas-powered equipment from
the truck or trailer and refuel iton the ground. If this is not
possible, then refuel such equipment on a trailer with a
portable container, rather than from a gasoline dispenser

nozzle,

6. Keep the nozzle in contact with the rim of the fuel tank or
container opening at all times until fueling iscomplete. Do
not use a nozzle lock-open device.

7. Extinguish all cigarettes, cigars, pipes and other sources
of ignition.

8. Never fuel machine indoors because flammable vapors
will accumulate in the area.

9. Never remove gas cap or add fuel while the engine is hot
or running. Allow engine to cool at least two minutes
before refueling.

10. Never over fill fuel tank. Fill tank to no more than ½ inch
below bottom of filler neck to provide space for fuel

expansion.

11. Replace gasoline cap and tighten securely.

12. ffgasoline is spilled, wipe itoff the engine and equipment.
Move unit to another area. Wait 5 minutes before starting
the engine.

13. Never store the machine or fuel container insidewhere
there is an open flame, spark or pilot light as on a water

heater, space heater, furnace ,clothes dryer or other gas
appliances.

14. To reduce fire hazard, keep mower freeof grass, leaves,
or other debris build-up. Clean up oil or fuel spillage and
remove any fuel soaked debris.

15. Allow a mower to cool at least 5 minutes before storing.

General Service:

1. Never run an engine indoors or in a poorly ventilated
area. Engine exhaust contains carbon monoxide, an
odorless and deadly gas.

2. Before cleaning, repairing, or inspecting, make certain
the blade and all moving parts have stopped. Disconnect
the spark plug wire and ground against the engine to
prevent unintended starting.

3. Checkthebladeandenginemountingboltsatfrequent
intervalsforpropertightness.Also,visuallyinspectblade
fordamage(e.g.,bent,cracked,worn)Replaceblade
withtheoriginalequipmentmanufacture's(O.EM.)blade
only,listedinthismanual."Useofpartswhichdonot
meettheoriginalequipmentspecificationsmayleadto
improperperformanceandcompromisesafety!"

4. Mowerbladesaresharpandcancut.Wrapthebladeor
weargloves,anduseextracautionwhenservicingthem.

5. Keepallnuts,bolts,andscrewstighttobesurethe
equipmentisinsafeworkingcondition.

6. Nevertamperwithsafetydevices.Checktheirproper
operationregulady.

7. Afterstrikingaforeignobject,stoptheengine,disconnect
thesparkplugwireandgroundagainsttheengine.
Thoroughlyinspectthemowerforanydamage.Repair
thedamagebeforestartingandoperatingthemower.

8. Neverattempttomakeawheelorcuttingheight
adjustmentwhiletheengineisrunning.

9. Grasscatchercomponents,dischargecover,andtrail
shieldaresubjecttowearanddamagewhichcould
exposemovingpartsorallowobjectstobethrown.For
safetyprotection,frequentlycheckcomponentsand
replaceimmediatelywithoriginalequipment
manufacturer's(O.EM.)partsonly,listedinthismanual.
"Useofpartswhichdonotmeettheoriginalequipment
specificationsmayleadtoimproperperformanceand
compromisesafety!"

10.Donotchangetheenginegovernorsettingoroverspeed
theengine.Thegovernorcontrolsthemaximumsafe
operatingspeedoftheengine.

11.Maintainorreplacesafetyandinstructionlabels,as
necessary.

12.Observeproperdisposallawsandregulations.Improper
disposaloffluidsandmaterialscanharmthe

environment.

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.

NOTE: Not all safety labels shown may apply to yeurlawn mower.

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SIGHT AND HOLD THIS LEVEL WITH A VERTICAL TREE

A POWER POLE

A CORNER OF A BUILDING

OR A FENCE POST

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co . Do not mow on inclines with a slope in excess of 15 degrees (a rise of approximately 2=1/2 feet every 10 feet). A riding mower could

Z _ c_ overturn and cause serious injury. If operating a walk=behind mower on such a slope, it is extremely difficult to maintain your footingco O

o. -_ and you could slip, resulting in serious injury.

_ Operate RIDING mowers up and down slopes, never across the face of slopes.

Operate WALK-BEHIND mowers across the face of slopes, never up and down slopes.

_D

SECTION3: ASSEMBLINGYOURLAWNMOWER

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 mower.

NOTE: Reference to right or left hand side of the mower

is observed from the operating position.

RemovingUnitFromCarton

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

carton.
Remove loose parts if included with unit (i.e.,

operator's manual, etc.)
Carefully cut along corners, lay carton down flat,
and remove packing material.

Roll or slide unit out of carton and check carton
thoroughly for loose parts.

DisconnectingSparkPlugWire

Before setting up your lawn mower, disconnect the

spark plug wire from the spark plug and ground against

the engine. See Figure 1.

Spark _
Plug Wire

Figure 1

SettingUpYourLawnMower

Lift up and pullback onthe upper handle to raise

the handle intothe operating position.Make certain
the lower handle is seated securely intothe handle
bracket assemblies. To secure the upper and lower
handle, tighten the wing nuts near the top of lower
handle (carriage bolts must be seated properly into
the handle).
Tighten the wing nuts at the end of the lower handle

to secure the handle to handle bracket assemblies.
See Figure 2.

NOTE: Your mower is shipped with the handle in the
higher position. If you wish to lower the height of the
handle, refer to the Adjustment Section.

Nuts

Lower
Handle

Handle
Bracket

Assemblies

Figure 2

Fasten the cables to the lower handle with the

cable tie found on the lower handle. Pull the cable

tie tight and trim offthe excess. See Figure 3.

Cable Tie

Handle

Figure 3

If not already, move rope guide to the first hole
above the lower handle on right side. The wing nut
loosens and secures the rope guide. See Figure 4.

Starter\ \ _ Upper Handle
Rope

jWing Nut

Rope j_

Guide

, Lower

Handle

Figure 4

With the spark plug wire disconnected and
grounded, hold the blade control handle against the

upper handle, and pull the starter rope out of the
engine. Release the blade control handle. Slip the

starter rope into the rope guide. Tighten the wing
nut.

NOTE: This manual represents two different model
series. Model 520 series comes with the side

discharge assembly on the unit and a snap on
mulching baffle. The 530 series comes with the

mulching baffle on the unit and a snap on side
discharge chute.

RemovingChuteRetainer(Models520 Series)
The chute deflector on your mower is held in an upright

position by a retainer for shipping purposes only.

Remove the retainer, following steps below, before
running the mower for the first time.

Push the chute deflector up and towards the
engine. Holding the deflector inthis position,
remove the retainer. See Figure 5.
Lower the chute deflector carefully to its operating
position keeping your fingers out of the way.

Raise Chute
Deflector

Retainer

Figure 5

WARNING: The chute retainer must be

removed and discarded before operating
the mower.

InstallingMulchingBaffle(Model 520 Series)

If your mower is equipped with the optional mulching
baffle, install it following these instructions:

Lift up side discharge chute and insert the mulching
baffle so that the notches at the bottom of the baffle

sit firmly on the lip of the deck opening. See Figure

6.
Snap the hooks of the baffle over the hinge pin on

the discharge chute. Make sure that the hooks
snaps into place, locking the mulching baffle firmly

on to the mower.
Release the side discharge chute.

Installing Side DischargeChute (Model 530 Series)

If your mower is equipped with the optional side
discharge chute, install it following these instructions:

Slide the hooks of the side discharge chute under
the hinge pin on the mulching baffle. Make sure that
the hooks snaps into place, locking the chute firmly

onto the mower. See Figure 7.

Release the mulching baffle.

Discharge

fChute

Baffle
Hook

Side Discharge

Chute

Insert Notches

on Top of Lip

Figure 6

Hinge Pin

Mulching
Baffle

Hooks

Figure 7

SECTION4: KNOWYOURLAWNMOWER

Read this operator's manual and safety rules before

operating your lawn mower. Compare the illustrationin

Figure 8 with your lawn mower to familiarize yourself

with the location of various controls and adjustments.
Save this manual for future reference.

WARNING: The operation of any lawn
mower can result in foreign objects being
thrown into the eyes, which can damage
your eyes severely. Always wear safety
glasses while operating the mower, or
while performing any adjustments or
repairs on it.

EngineControls

See the separate engine manual for the location and
function of the controls on the engine.

Blade Control Handle
The blade control handle is located on the upper handle

of the mower. The blade control handle must be
depressed in order to operate the unit. Release blade

control handle to stop engine and blade.

WARNING: This blade control mechanism

is a safety device. Never attempt to bypass
its operations.

eControl

Handle #_

_-Drive Control

Handle

Mulching
Plug

jDischarge

,F Chute

Starter

Cutting Height
Adjustment
Lever

Mulchi_
Plug

Discharge j

Chute

Figure 8

RecoilStarter

The recoil starter is attached to the right lower handle.
Stand behind the unit and pull the recoil starter to start

the unit. See Figure 8.

CuttingHeightAdjustmentLevers
These levers are located on each wheel and they are

used to adjust the cutting height. All four levers have to

be at the same relative positionto ensure a uniform cut.
See Figure 8.

DriveControlHandle
The drive controlhandle is located on the upper handle.

Squeeze the drive controlhandle against the upper
handle to engage drive system. Release the control
handle to disengage the drive system in order to stop,
slow down, or backup.

StoppingEngine

Release blade control handle to stop the engine

and the blade.

Disconnect spark plug wire and ground it to a bolt

on the engine.

SECTION5: OPERATINGYOURLAWNMOWER

v

TowardsBetterMowerPerformance

1. Pour fresh, clean gasoline intothe mower's gas
tank until the tank isfull. Do not use gasoline

that is more than 30 days old.

2. Make sure to connect the mower's spark plug
wire before trying to start the engine.

3. Add engine oil to the oil fill on the mower engine.

Check the dipstick and add more if necessary.
Remember that the oil level has to touch the fill

line.

4. Locate the primer decal near the primer bulb on
the engine, and read itsinstruction. Using your

thumb, press the primer bulb slowly as many
times as the decal advises.

5. Hold control handle down and pull rope firmly to
start the engine.

6. Set cutting height adjustment lever to middle
setting and mow a single pass on your lawn;
then adjust to desired height for a closer cut.

7. To mulch insert the mulch plug/cover on the
mower.

8. Before storing the lawn mower for the winter,
use stabilizer-treated fuel and run the tank dry.

9. Thirty days before start of the new season,
check the air filter, spark plug and blade on the

lawn mower, and replace if needed.

J

&

WARNING: Keep hands and feet away from
chute area on the cutting deck. The
operation of any lawn mower can result in
foreign objects being thrown into the eyes,
which can result in severe eye damage.
Always wear safety glasses or eye shields.

NOTE: For shipping purposes your mower is set with

the wheels in a low cutting height position. For best
results raise the cutting position until it is determine

which height is best for your lawn. See the Adjustment
Section for details.

GasandOilFill-Up

Service the engine with gasoline and oil as instructed in

the separate engine manual packed with your mower.
Read instructions carefully.

WARNING: Never fill fuel tank indoors with
engine running or until the engine has

been allowed to cool for at least two
minutes after running.

BeforeStartingYourMower

Check for proper clutch operation by performing the

following procedure before starting the engine.

With the drive clutch released, push mower

forward. It should move freely. Pull mower

backward. It should move with only a small amount
of resistance.

Ifthewheelstendtolockup,theclutchmaynotbe

releasingcompletely.Donotstarttheengineuntil
correctionshavebeenmade.

Checkthedrivecableforseverebends,kinks,or
binding.Alsocheckforgrassbuild-uparoundthe

belt.

Ifdriveclutchcontrolneedsadjustmentseethe

AdjustmentSection.

StartingEngine

Attach spark plug wire to spark plug. Make certain
the metal cap on the end of the spark plug is
fastened securely over the metal tip on the spark
plug.
Prime engine as instructed in the separate engine
manual packed with your unit.
Your lawn mower may be equipped with a constant
speed throttle, which is set at full throttle for best
performance.
Stand behind the mower and squeeze the blade
control handle against the upper handle.
Grasp recoil starter handle and pull rope out slowly
until engine reaches the start of compression cycle
(rope will pull slightly harder at this point). Let the
rope rewind slowly. Pull rope with a rapid,
continuous, full arm stroke. Keeping a firm grip on
the starter handle, let the rope return to the starter
slowly.

UsingYourLawnMower

Be sure that the lawn is clear of stones, sticks, wire, or

other objects which could damage the lawn mower or
the engine. Such objects could be accidently thrown by
the mower in any direction and cause serious personal
injury to the operator and others.

For best results, do not cut wet grass because it tends
to stick to the underside of the mower, preventing
proper discharge of grass clippings, and could cause
you to slip and fall. New grass, thick grass, orwet grass
may require a narrower cut.

For a healthier lawn, never cut off more than one-third
of the total length of the grass. Your lawn should be cut

in the fall as long as there is growth. This mower is
designed to be operated at full throttle to give you the

best cut and do the most effective job of mowing or
mulching.

WARNING: If you strike a foreign object,

stop the engine. Remove wire from the
spark plug, thoroughly inspect the mower

for any damage, and repair the damage

before restarting and operating the
mower. Extensive vibration of the mower

during operation is an indication of
damage. The unit should be promptly

inspected and repaired.

Mulching

For effective mulching, do not cut wet grass because it
tends to stick to the underside of the deck, preventing

proper mulching of grass clippings. New or thick grass
may require a narrower cut. The ground speed should

be adjusted to the condition of the lawn. If mowing has
been delayed and the grass has been allowed to grow

in excess of 4", mulching is not recommended. Mow
using the side discharge to reduce the grass height to 3

1/4" maximum before mulching.

SECTION6: MAKINGADJUSTMENTS

WARNING: Do not at any time make any

adjustments without first stopping engine
and disconnecting spark plug wire.

CuttingHeightAdjustment

Each wheel has a height adjustment lever which
provides cutting height adjustment. When the
adjustment lever is moved from one location to another
the height of cut will be changed. Simply depress the
lever towards wheel and move lever assembly to
desired position. See Figure 9.

IMPORTANT: All wheels must be placed in the same
relative position. For rough or uneven lawns, move the
height adjustment lever to a higher position. This wilt
help stop scalping of the grass.

Height \ _ _//

Adjustment Levers_

Figure 9

10

HandleHeightAdjustment

Your mower is shipped with the handle in the higher
height position.To lower the height proceed as follows:

Remove the starter rope from the rope guide,
Disconnect the handle from the handle bracket

assemblies by removing the wing nuts.

See Figure 10.
Position each handle bracket assembly stud into
one of the other holes in the lower handle.

Each end of the lower handle must be placed in
same relative position.

EngineAdjustments

See the separate engine manual packed with your unit
for adjustments to the engine.

Lower'
Handle

Handle
Bracket

Figure 10

Nuts

SECTION7: MAINTAININGYOURLAWNMOWER

CustomerResponsibilities

MAINTENANCE o,_ _ _ _ _ _ SERVICE

SCHEDULE

£ £ ,o_ .co° no< DATES

Lubricate Wheels

t-
0 Lubricate Blade Control

:::3

_ Clean Deck

n Blade Care

CheckOil

Change Oil

Replace Air Filter

_ Clean Engine

UA

Check Spark Plug
Check Spark Arrester (if any)

GeneralRecommendations

Always observe safety rules when performing any
maintenance.

Changing of engine governed speed will void
engine warranty.

The warranty on this lawn mower does not cover
items that have been subjected to operator abuse

or negligence. To receive full value from the
warranty, operator must maintain the lawn mower
as instructed in this manual.

Lubrication

Some adjustments will have to be made
periodically to maintain your unit properly. All
adjustments in the Making Adjustments section of

this manual should be checked at least once each

season.
Periodically check all fasteners and make sure

these are tight.

Follow the maintenance schedule under Customer
Responsibilities to get quality performance from

your lawn mower.

11

WARNING: Always stop engine and

disconnect spark plug wire before
cleaning, lubricating or doing any kind of

service work on the lawn mower.

Blade Control Handle and Drive Clutch Control:

Lubricate the pivot points on the blade control handle
and the drive clutch control at least once a season with

light oil. These handles must operate freely in both
directions. See Figure 11.

Wheels: Lubricate the wheels at least once a season
with light oil (or motor oil). If the wheels are removed for

any reason, lubricate the surface of the axle bolt and
inner surface of the wheel with light oil.

Chute Deflector or Mulching Baffle: Lubricate the
torsion spring and pivot point periodically with light oil to
prevent any rust or binding.

Engine: Follow the separate engine manual packed
with you unit for lubrication instructions.

Lubricate

J

LubricateJ

Figure 11

Maintenance

NOTE: When tipping the unit or emptying the fuel tank

keep the air cleaner side of engine up. Never tip the
mower more than 90 degrees and do not leave the

mower tipped for any length of time. Oil can drain into
the upper part of the engine causing a starting problem.

Engine

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

Maintain engine oil as instructed in the separate
engine manual packed with your unit.
Service air cleaner every 25 hours under normal
conditions. Poor engine performance and flooding
usually indicate that the air cleaner should be

serviced. To service the air cleaner, refer to the
separate engine manual packed with your unit.

The spark plug should be cleaned and the gap
reset once a season. Spark plug replacement is
recommended at the start of each mowing 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 grass,

dirt, and combustible debris from muffler area.

Deck
The underside ofthe mower deck should be cleaned

after each use to prevent a buildup of grass clippings,
leaves, dirt, or other matter. If this debris is allowed to

accumulate, it will inviterust and corrosion, and may
prevent proper mulching, discharge, orbagging. The
deck may be cleaned by tilting the mower and scraping
clean with a suitable tool (make certain the spark plug
wire isdisconnected).

iMPORTANT:We do not recommend the use of a
pressure washer or garden hose to clean your unit.

Cutting Blade Removal,Replacement,and Sharpening

When removing the cutting blade for sharpening or

replacement, protect your hands with a pair of
heavy gloves or use a heavy rag to hold the blade.
Remove the bolt and the blade bell support which
hold the blade and the blade adapter to the engine
crankshaft. See Figure 12.
Remove the blade and the adapter from the

crankshaft.

Blade
Adapte_ I

Blade Bell

_Support

f Hex Bolt

Figure 12

WARNING: Periodically inspect the blade

adapter for cracks, especially if you strike
a foreign object. Replace when necessary.

When sharpening the blade, follow the original angle of
grind as a guide. It is extremely important that each
cutting edge receives an equal amount of grinding to
prevent an unbalanced blade. An unbalanced blade will
cause excessive vibration when rotating at high
speeds. It may cause damage to the mower, and could
break causing personal injury.

12

The blade can be tested by balancing it on a round
shaft screwdriver. Remove metal from the heavy side
until it balances evenly. It is recommended that the
blade always be removed from the adapter when
testing for balance. Before reinstalling the blade and
the blade adapter to the unit, lubricate the engine
crankshaft and the inner surface of the blade adapter
with light oit.

Be sure to install the blade with end tips facing up
or the side of the blade marked "Bottom" (or with
part number) facing the ground when the mower is
in the operating position.
Slide the blade adapter onto the engine crankshaft.
Place the blade on the adapter. Be certain the
blade is aligned and seated on the blade adapter
flanges.
Place blade bell support on blade. Make sure the
notches on the blade belt support are aligned with

small holes in the blade.
Replace hex bolt and tighten hex bolt to torque: 450

in. lbs. min., 600 in. lbs. max.

NOTE: To ensure safe operation of your mower, the

blade bolt must be checked periodically for correct
torque.

DriveBeltRemovalAndReplacement

Disconnect the spark plug wire and ground it
against the engine.

Drain the fuel tank or place a piece of plastic
beneath the cap to prevent gasoline leakage.

If unit is tipped for easier access to belt, tip the

mower back on its side with the air filter side away
from the ground.

Transmission
Cover

_ Rivet

Figure 13

To get easier access to the belt,just securely place
the mower on raised blocks.

Remove the transmission cover by sliding offthe
two plastic rivets with a screwdriver on each side of
cover. See Figure 13.
With the drive system in the disengaged position,
the belt can be lifted offthe transmission pulley.
See Figure 14.

Pull the belt from under the deck toward rear of unit
and through gap in cutting deck.

Transmission

Pulley

(

Belt_ Belt

Keeper

Figure 14

If belt can not be removed by slipping belt around
blade, then remove the blade following the steps in

the previous section. See Figure 15.

Slide new belt around engine pulley and through
gap in cutting deck.

Pull belt toward front of mower and around

transmission pulley.

Make sure belt is routed inside the belt keepers.
See Figure 14.
Reattach the transmission cover using the rivets
previously removed.
Reassemble blade and torque as instructed in
previous section.

Keeper Bracket

Figure 15

0ff-SeasonStorage

The following steps should be taken to prepare your
lawn mower for storage.

Clean and lubricate mower thoroughly as described
in the lubrication instructions.

IMPORTANT:We do not recommend the use of a
pressure washer or garden hose to clean your unit.

13

Refertoenginemanualforcorrectenginestorage
instructions.

Coatmower'scuttingbladewithchassisgreaseto
preventrusting.

Storemowerinadry,cleanarea.Donotstorenext
tocorrosivematerials,suchasfertilizer.

NOTE:When storing any type of power equipment in a

poorly ventilated or metal storage shed, care should be
taken to rust-preof the equipment. Using a light oil or

silicone, coat the equipment, especially cables and all
moving parts.

SECTION8: TROUBLESHOOTING

Problem Cause

Engine fails to start

Engine runs erratic

1. Blade control handle disengaged.

2. Spark plug wire disconnected.

3. Fuel tank empty or stale fuel.

4. Blocked fuel line.

5. Faulty spark plug.

6. Engine flooded

1. Spark plug wire loose.

2. Blocked fuel line or stale fuel.

3. Vent in gas plugged.

4. Water or dirt in fuel system.

5. Dirty air cleaner.

6. Carburetor out of adjustment.

1. Engine oil level tow.

2. Air flow restricted.

3. Carburetor not adjusted properly.

1. Spark plug fouled, faulty or gap too
wide.

Carburetor improperly adjusted.
Dirty air cleaner.

Cutting blade loose or unbalanced.

1.

2.

3.

4.

5.

6.

1.

2.

3.

4.

5.

6.

1.

2.

3.

1.

Engine overheats

Idles poorly

2. 2.

3. 3.

Excessive vibration 1. 1.

2. Bent cutting blade. 2.

Mowerwilt not mulch gras,_ 1. Wet grass. 1.

2. Excessively high grass. 2.

3. Dull blade. 3.

Uneven cut 1. Wheels not positioned correctly. 1.

2. Dull blade. 2.

Wheels will not propel 1. Belt not installed properly. 1.

2. Debris clogging drive operation. 2.

Remedy

Engage blade control handle.
Connect wire to spark plug.
Fill tank with clean, fresh gasoline.

Clean fuel line.
Clean, adjust gap, or replace.

Wait a few minutes to restart, but do not
prime.

Connect and tighten spark plug wire.
Clean fuel line; fill tank with clean, fresh

gasoline
Clear vent.

Drain fuel tank. Refill with fresh fuel.
Clean air cleaner.

Adjust carburetor.
Fill crankcase with proper oil.

Remove blower housing and clean.
Adjust carburetor.

Reset gap to .030" or replace spark
plug.
Adjust carburetor.

Clean air cleaner.
Tighten blade and adapter. Balance

blade.
Replace blade.

Do not mow when grass is wet; wait
until later to cut.

Mow once at a high cutting height, then
mow again at desired height or make a
narrower cutting path.
Sharpen or replace blade.

Place all four wheels in same height
position.
Sharpen or replace blade.

Check belt for proper pulley installation
and movement.

Clean out debris.

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

14

NOTES

15

ModelSeries520thru530

1

2

5

6

7

9

, 13

12

11

10

47 18

_-,._14

32

72j

47_

49

72

50

I

58 "_

4

57 4.!,

16

ModelSeries520thru530

Ref.

No.

1,
2,
3,

4,

5,
6,
7,
8,
9,

10.

11.

12.

13.

14.

15.

16.

17.

18.

19.

20.

21.

22.

23.

24.

25.

26.

27.

28.

29.

30.

31.

32.

33.

34.

35.

36.

37.

Part No.

747-1214
747-1161A

746-1113
746-1132
746-1114

746-1092A

749-1092A
710-1205

726.0279
712-0324
710-0606
710-1174
736-0451

726.0284
749-1093B

725-0157
782-9065
73%2280
710-0896

682-3062A

736-3050
712-0431

682-3063A
682-0096

682-0110

782-9063
710-0654A
712-0240
736-0407
756-1167
754-0483

710-1276
782-9062

732-0992
782-0585
728-0199
750-1209

716-0198

618-0391A

750-1210

Ref.

Part Description No. Part No.

Drive Control Handle 38. 731-0073
Blade Control Handle 39. 756-1183

Blade Control Cable - B&S 40. 748-0426
Blade Control Cable - B&S 41. 742-0642A
Blade Control Cable- Tec 742-0742A

Drive Control Cable 42. 736-0452
Upper Handle 43. 710-1044

Eye Bolt 44. 782-0584
Wing Nut 1/4-20 45. 741-0710

Hex Lock Nut 1/4-20 46. 716.0216
Hex Cap Screw 1/4-20x 1.5 47. 720-0426

Carriage Bolt 5/16-18 x 2.0 48. 682-0544
Shoulder Washer ,320 ID x .93 OD 682-0545

Wing Nut 49. 731-2522
Lower Handle 50. 715-0221

Cable Tie 51. 717-1761
Hinge Clip 717-1762

Trail Shield 52. 736-0105
Hex Screw 1/4-14 x ,625 53. 634-0190

Handle Bracket Assembly - RH 54. 738-1168
Flat Washer .406 ID x .812 OD 55. 747-0710

Lock Nut 3/8-16 56. 732-1014
Handle Bracket Assembly- LH 57. 63%0098

Deck Assembly 22" 58. 731-1034B
Deck Assembly 22" (No Sprigs) 59. 736-0270

Engine Belt Keeper Bracket 60. 73%1035B
Hex Washer Screw 3/8-16 x 1,0 61. 716.0216

Jam Nut 7/16-20 62. 741-0717
Bell Washer .45 ID x 1.00 OD 63. 732-0984B

Pulley 64. 682-0093
V-Belt 65. 738-1127

Hex Washer Screw 1/4-20 x ,750 66. 736-0182
Transmission Belt Keeper Bracket 67. 734-1864

Compression Spring 68. 731-2230
Forward Height Adjustment Plate - LH 69. 731-1386D
Rivet 70. 748-0390

Sleeve Spacer .550 ID x 2,5 71. 716-0865
Retainer Ring 72. 736-0105

Transmission Assembly 73. 712-0130
Sleeve Spacer .550 ID x 8,9

Part Description

Transmission Cover

Drive Pulley

Blade Adapter
Blade 22"

Mulching Blade 22"
Bell Washer .396 ID x 1.140 OD

Hex Cap Screw 3/8-24 x 1,5
Forward Height Adjustment Plate - RH

Sleeve Bearing

Hex Cap Screw 3/8-16 x ,75

Adjustment Knob
Spring Lever Assembly - LH (FWD)

Spring Lever Assembly - RH (FWD)
Wheel Dust Cover

Pin

Spur Gear 14T - LH
Spur Gear 14T - RH

Bell Washer .401 ID x .870 OD

Front Wheel Assembly 8 x 1.8

Shoulder Screw 3/8

Hinge Pin
Torsion Spring
Mulching Baffle (If Equipped)
Side Discharge Assembly

Bell Washer .265 ID x .75 OD
Chute Hinge

Hex Cap Screw 3/8-16 x .75
Thrust Bearing ,688 ID x 1,938 OD
Spring Lever

Rear Pivot Arm Assembly
Shoulder Screw 3/8-16

Spring Washer

Rear Wheel Assembly 14 x 1.8
Snap Discharge Chute (If Equipped)

Snap Mulching Plug (If Equipped)
Bearing Spacer

Snap Ring .500
Washer Spacer .401 ID x ,870 OD

Hex Lock Nut 3/8-16

17

ModelSeries520 thru530

7.

6

_9

3

2

13

©

15

Ref.

No.

1. 618-0392

2. 721-0329

3. 741-0673

4. 736-0520

Upper Housing Assembly
Oil Seal .500 ID x .687 OD

Flange Bearing .503 ID x .689 OD

Flat Washer .504 ID x .700 OD x ,030
736-0711
736-0712
736-0713

5. 717-1596

6. 715-0139
711-1595

8. 719-0538

9. 710-1276

10. 716-0231

11. 736-0336
736-0337

736-0349
736-0494

736-0495

12. 741-0735

13. 719-0537

14. 736-0336
736-0494

15. 711-1390

Flat Washer 504 ID x .700 OD x .035
Flat Washer 504 ID x .700 OD x .040
Flat Washer .504 ID x .700 OD x .045

Bevel Gear 44T
Roll Pin

Output Shaft
Lower Housing

Hex Washer Screw 1/4-20 x .75
E-Ring .750

Flat Washer .625 ID x 1.00D x ,030
Flat Washer ,625 ID x 1.00D
Flat Washer .63 ID x 1.00D x .020

Flat Washer ,632 ID x 1.00D x .035
Flat Washer .632 ID x 1.00D x .035
Needle Bearing .625 x .813

Upper Housing

Flat Washer .625 ID x 1.00D x .030

Flat Washer .632 ID x 1.00D x .035

Input Shaft

18

19

MANUFACTURER'S LIMITED WARRANTY FOR:

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 LLC warrants this product against defects 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 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 acces-

sory or attachment not approved by MTD LLC for use with the
product(s) covered by this manual will void your warranty as
to any resulting damage.

Normal wear parts or components thereof are subject to sep-

arate terms as follows: All normal wear parts 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 materials or workmanship of OTHER
component parts. Normal wear parts and components
include, but are not limited to: batteries, belts, blades, blade

adapters, grass bags, rider deck wheels, seats, snow thrower
skid shoes, shave plates, auger spiral rubber, tires.

d. MTD LLC does not extend any warranty for products

sold or exported outside of the United States, its posses-
sions and territories, except those sold through MTD

LLC's authorized channels of export distribution.

e. Parts that are not genuine MTD parts are not covered by

this warranty.

f. Service completed by someone other than an authorized

service dealer is not covered by this warranty.

g. Transportation charges and service calls are not

covered.

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, includ*

ing a dealer or retailer, with respect to any product, shall
bind MTD LLC. 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

LLC shall not be liable for incidental or consequential
loss or damage including, without limitation, expenses
incurred for substitute or replacement lawn care ser*
vices or for rental expenses to temporarily replace a war*

ranted product.

HOW TO OBTAIN SERVICE: Warranty service is available,

WITH PROOF OF PURCHASE, through your local autho-
rized service dealer. To locate the dealer in your area, check

your Yellow Pages, or contact MTD LLC at RO. Box 361131,
Cleveland, Ohio 44136-0019, 1-800-800-7310, 1-330-220-

4683 or log on to our Web site at www.mtdproducts.com.

This limited warranty does not provide coverage in the follow-
ing cases:
a. The engine or component parts thereof. These items

carry a separate manufacturer's warranty. Refer to the
applicable manufacturer's warranty for terms and condi-

tions.

b. Log splitter pumps, valves, and cylinders have a sepa-

rate one year warranty.

c. 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 exposure.

Some states do not allow the exclusion or limitation of inci-
dental or consequential damages, or limitations on how long

an implied warranty lasts, so the above exclusions or limita-
tions 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 loss, 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 pur-

chased 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.

MTD LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019 1-800-800-7310