MTD 12A 528F731 User Manual LAWN MOWER Manuals And Guides 1108734L

User Manual: MTD 12A-528F731 12A-528F731 MTD LAWN MOWER - Manuals and Guides View the owners manual for your MTD LAWN MOWER #12A528F731. Home:Lawn & Garden Parts:MTD Parts:MTD LAWN MOWER Manual

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Operator's Manual

22" Self-Propelled

Mower

Model Series 520

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 California the above is required by law (Section 4442 of the California Public Resources Code). Other states may have

similar laws. Federal laws apply on federal lands. A spark arrester for the muffler is available through your nearest engine authorized

service dealer or contact the service department, P.O. Box 361131 Cleveland, Ohio 44136-0019.

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

PRINTED IN U.S.A. FORM NO. 770-10349E

(12/03)

Content

Important Safe Operation Practices

Slope Gauge

Assembling Your Lawn Mower

Know Your Lawn Mower

Operating Your Lawn Mower

TABLEOFCONTENTS

Page Content Page

3 Making Adjustments 11

6 Maintaining Your Lawn Mower 12

7 Trouble Shooting 15

9 Illustrated Parts 16

10 Warranty 20

FINDINGMODELNUMBER

This Operator's Manual is an important part of your new lawn mower. It will help you assemble, prepare and

maintain the unit for best performance. Please read and understand what it says.

Before you start assembling your new equipment, please locate the model plate on the

equipment and copy the information from it in the space provided below. A sample model plate is

also given below. You can locate the model plate by standing at the operating position and

looking down at the rear of the deck. This information will be necessary to use the

manufacturer's web site and/or help from the Customer Support Department or an authorized

service dealer.

P. O. BOX 3611131

CLEVELAND,OH 44136

330-228-4683

', www.m{uprOuuc_s.com 888-888-7318

Copy the model number here:

Copy the serial number here:

CUSTOMERSUPPORT

Please doNOTreturntheunit to the retailer fromwhereit waspurchased,withoutfirstcontactingCustomerSupport.

If you have difficulty assembling this product or have any questions regarding the controls, operation or

maintenance of this unit, you can seek help from the experts. Choose from the options below:

En ine

Visit mtdproducts.com for many useful suggestions. Click on Customer Support button and

you will get the four options reproduced here. Click on the appropriate button and help is

immediately available.

answer you are

looking for could be just

"f

a mouse c//cA awayf

answer are

looking for could be just

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a mouse c//cA awayf

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

The engine manufacturer is responsible for all engine-related issues with regards to

performance, power-rating, specifications, warranty and service. Please refer to the engine

manufacturer's Owner's/Operator's Manual, packed separately with your unit, for more

information.

SECTION1: 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 walt 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.

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. If you 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 welt balanced with sure footing.

c. Pull the mower back slowly, no more than halfway

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 a safety device. 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 a warning of trouble.

19. 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.Onlyusepartsandaccessoriesmadeforthismachineby

themanufacturer.Failuretodoso,canresultinpersonal

injury.

23.Ifsituationsoccurwhicharenotcoveredinthismanual,

usecareandgoodjudgment.Contactyourdealerfor

assistance.Telephone1-800-800-7310forthenameof

yournearestdealer.

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 if the 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, look behind and

down for small children.

4. Use extreme care when approaching blind corners,

8,

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 instructions and

safety rules in this manual and should be trained and

supervised by a parent.

Service

Safe HandlingOfGasoline:

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 a vehicle 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 it on 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 is complete. 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

wilt 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. If gasoline is spilled, wipe it off the engine and equipment.

Move unit to another area. Wait 5 minutes before starting

the engine.

13. Never store the machine or fuel container inside where

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 free of 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.

GeneralService:

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.E.M.)blade

only,listedinthismanual."Useofpartswhichdonot

meettheoriginalequipmentspecificationsmayleadto

improperperformanceandcompromisesafety!"

4. Mowerbladesaresharpandcancut.Wrapthebladeor

weargloves,anduseextracautionwhenservicingthem.

5. Keepallnuts,bolts,andscrewstighttobesurethe

equipmentisinsafeworkingcondition.

6. Nevertamperwithsafetydevices.Checktheirproper

operationregularly.

7. Afterstrikingaforeignobject,stoptheengine,disconnect

thesparkplugwireandgroundagainsttheengine.

Thoroughlyinspectthemowerforanydamage.Repair

thedamagebeforestartingandoperatingthemower.

8. Neverattempttomakeawheelorcuttingheight

adjustmentwhiletheengineisrunning.

9. Grasscatchercomponents,dischargecover,andtrail

shieldaresubjecttowearanddamagewhichcould

exposemovingpartsorallowobjectstobethrown.For

safetyprotection,frequentlycheckcomponentsand

replaceimmediatelywithoriginalequipment

manufacturer's(O.E.M.)partsonly,listedinthismanual.

"Useofpartswhichdonotmeettheoriginalequipment

specificationsmayleadtoimproperperformanceand

compromisesafety!"

10.Donotchangetheenginegovernorsettingoroverspeed

theengine.Thegovernorcontrolsthemaximumsafe

operatingspeedoftheengine.

11.Maintainorreplacesafetyandinstructionlabels,as

necessary.

12.Observeproperdisposaltawsandregulations.Improper

disposaloffluidsandmaterialscanharmthe

environment.

_, ARNING - 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 your lawn mower.

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WARNING

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

overturn and cause serious injury. If operating a walk-behind mower on such a slope, it is extremely difficult to maintain your footing

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.

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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. See Figure 1.

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 3.

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.

Lower

Handle/

Bracket j/

Assembly

Spark Plug

Figure 1

SettingUpYourLawnMower

• Raise the lower handle, as shown in Figure 2

(Step1), until it snaps into place. Lift up and pull

back on the upper handle to raise the handle into

the operating position (Step 2). See Figure 2. Make

certain the lower handle is seated securely into the

handle bracket assemblies.

,_1_2. Lift upper

handle

1. Lift lower

handle

Figure 3

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 4.

Cable Tie

Lower

Figure 4

If not there 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 5.

Starter. Handle

Rope Nut

Rope

Guide

Lower

Handle

Figure 2 Figure 5

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.

RemovingChuteRetainer

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 in this position,

remove the retainer. See Figure 6.

• Lower the chute deflector carefully to its operating

position keeping your fingers out of the way.

Raise Chute

Deflector

Retai ner

Figure 6

WARNING: The chute retainer must be

removed and discarded before operating

the mower.

Installing MulchingBaffle

If your mower is equipped with the optional mulching

baffle, install it on the right side of the deck following

these instructions. Make sure to follow the correct

sequence as indicated here.

• Lift up and hold the side-discharge chute deflector.

• Insert bottom lip of the mulching baffle inside the

chute opening. See Figure 7.

• Snap hooks of the mulching baffle over the hinge

pin of the chute deflector. See Figure 7. The hooks

must snap into place on the hinge pin, locking the

mulching baffle firmly onto the mower. For a close-

up of the hinge pin location, see inset.

• Release the chute deflector.

NOTE: Install bottom lip inside chute opening

(indicated by I in the figure below) before placing hooks

over the hinge pin (indicated by 2 in the figure below).

Chute

Deflector

Hing_

Pin

Hooks

/

Opening

Lip of Mulching Baffle

(install inside chute opening)

Figure 7

InstallingRearWheels

• Place the rear of the mower deck on raised blocks.

• Remove lock nut from pivot arm assembly, slide

wheel, with hollow side in, onto axle and secure

with lock nut. See Figure 8.

Assemble the other side in the same manner.

Nut

Figure 8

SECTION4: KNOWYOURLAWNMOWER

Read this operator's manual and safety rules before

operating your lawn mower. Compare the illustration in

Figure 9 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.

BladeControlHandle

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 asafety device. Never attempt to bypass

its operations

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 9.

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 position to ensure a uniform cut.

See Figure 9.

DriveControl Handle

The drive control handle is located on the upper handle.

Squeeze the drive control handle 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.

Blade Control

Handle

Starter

Handle

Mulching

Plug

Cutting Height

Adjustment

Discharge

Chute

Figure 9

SECTION5: OPERATINGYOURLAWNMOWER

TowardsBetterMowerPerformance

1. Pour fresh, clean gasoline into the mower's gas 5.

tank until the tank is full. Do not use gasoline

that is more than 30 days old. 6.

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. 7.

Check the dipstick and add more if necessary.

Remember that the oil level has to touch the fill

line. 8.

4. Locate the primer decal near the primer bulb on

the engine, and read its instruction. Using your 9.

thumb, press the primer bulb slowly as many

times as the decal advises.

Hold control handle down and pull rope firmly to

start the engine.

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.

To mulch insert the mulch plug/cover on the

mower.

Before storing the lawn mower for the winter,

use stabilizer-treated fuel and run the tank dry.

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

•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.

StartingEngine

• Prime engine as instructed in the separate engine

manual packed with your unit.

• Your lawn mower is 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.

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.

10

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, or wet 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 aforeign 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

114"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 10.

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 will

help stop scalping of the grass.

Height

Adjustment Lever

Figure 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 11.

• 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.

• Reassemble wing nuts and place starter rope back

into the rope guide.

Nuts

Lower"

Handle

Handh

Bracket

Assemblies

Figure 11

EngineAdjustments

See the separate engine manual packed with your unit

for adjustments to the engine.

11

SECTION7: MAINTAININGYOURLAWNMOWER

CustomerResponsibilities

£

MAINTENANCE Qeo<"

SCHEDULE

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SERVICE

DATES

Lubricate Wheels

t---

© Lubricate Blade Control

_) Clean Deck

n_

a_ Blade Care

Check Oil

Change Oil

7m Replace Air Filter

0 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.

• 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.

Lubrication

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 12.

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 pivot arm axle

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 your unit for lubrication instructions.

12

Lubricate

Figure 12

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 of the 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 invite rust and corrosion, and may

prevent proper mulching, discharge, or bagging. The

deck may be cleaned by tilting the mower and scraping

clean with a suitable tool (make certain the spark plug

wire is disconnected).

IMPORTANT:We do not recommend the use of a

pressure washer or garden hose to clean your unit.

CuttingBlade Removal,Replacement,and Sharpening

WARNING: 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 13.

• Remove the blade and the adapter from the

crankshaft.

Blade Bell

Support

Bolt

Figure 13

,_ WARNING: Periodically inspect the blade

adapter for cracks, especially if you strike

aforeign object. Replace when necessary.

IMPORTANT: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.

• 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 oil.

• 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.

13

• Place blade bell support on blade. Make sure the

notches on the blade bell support are aligned with

small holes in the blade.

• Replace hex bolt and tighten hex bolt to torque: 450

in. Ibs. min., 600 in. Ibs. max.

NOTE: To ensure safe operation of your mower, the

blade bolt must be checked periodically for correct

torque.

Drive BeltRemovalAndReplacement

• 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.

4

Figure 14

Transmission

Cover

Plastic

• To get easier access to the belt, just securely place

the mower on raised blocks.

• Remove the transmission cover by sliding off the

two plastic rivets with a screwdriver on each side of

cover. See Figure 14.

• Using a torque wrench, loosen the screw holding

the belt tension spring to the transmission. See

Figure 15.

• Do not remove the screw completely, as you loosen

the screw the tension on the belt will be released.

• Push the transmission up a little and slide the belt

off the transmission pulley.

• Lift the mower to access the belt from the underside

of the mower.

Loosen this screw

Shoulder

Screw

_Transmission

Figure 15

• Slide the belt off the engine pulley and around the

blade. See Figure 16.

Right Front Left Front

Wheel Wheel

Engine

Pulley

Figure 16

WARNING: As always, use athick piece of rag to

handle the blade while sliding the belt around it.

Make sure the spark plug is disconnected and

grounded for this job.

• Replace with the new belt, working around the

blade. Make sure the belt is firmly seated on the

engine pulley while pulling from the other side and

sliding it around the transmission pulley.

• Put the mower down with all four wheels firmly

placed on one level.

• Tighten the screw, loosened earlier, to secure the

belt tension spring to the transmission, and

reassemble the front drive cover.

14

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.

• Refer to engine manual for correct engine storage

instructions.

• Coat mower's cutting blade with chassis grease to

prevent rusting.

• Store mower in a dry, clean area. Do not store next

to corrosive materials, such as fertilizer.

NOTE: When storing any type of power equipment in a

poorly ventilated or metal storage shed, care should be

taken to rust-proof the equipment. Using a light oil or

silicone, coat the equipment, especially cables and all

moving parts.

SECTION8: TROUBLESHOOTING

Problem Cause Remedy

Engine fails to start

Engine runs erratic

Engine overheats

Idles poorly

Excessive vibration

Mower will not mulch grass

Uneven cut

Wheels will not propel

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 low.

2. Air flow restricted.

3. Carburetor not adjusted properly.

1. Spark plug fouled, faulty or gap too

wide.

2. Carburetor improperly adjusted.

3. Dirty air cleaner.

1. Cutting blade loose or unbalanced.

2. Bent cutting blade.

1. Wet grass.

2. Excessively high grass.

3. Dull blade.

1. Wheels not positioned correctly.

2. Dull blade.

1. Belt not installed properly.

2. Debris clogging drive operation.

1. Engage blade control handle.

2. Connect wire to spark plug.

3. Fill tank with clean, fresh gasoline.

4. Clean fuel line.

5. Clean, adjust gap, or replace.

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

prime.

1. Connect and tighten spark plug wire.

2. Clean fuel line; fill tank with clean, fresh

gasoline.

3. Clear vent.

4. Drain fuel tank. Refill with fresh fuel.

5. Clean air cleaner.

6. Adjust carburetor.

1. Fill crankcase with proper oil.

2. Remove blower housing and clean.

3. Adjust carburetor.

1. Reset gap to.030" or replace spark

plug.

2. Adjust carburetor.

3. Clean air cleaner.

1. Tighten blade and adapter. Balance

blade.

2. Replace blade.

1. Do not mow when grass is wet; wait

until later to cut.

2. Mow once at a high cutting height, then

mow again at desired height or make a

narrower cutting path.

3. Sharpen or replace blade.

1. Place all four wheels in same height

position.

2. Sharpen or replace blade.

1. Check belt for proper pulley installation

and movement.

2. Clean out debris.

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

15

SECTION9: PARTSLISTFORMODELSERIES520

54

12

22

63 64

40

25

31

16

ModelSeries520

Ref,

No,

1.

2.

3.

4.

5.

6.

7.

10.

11.

12.

13.

14.

15.

16.

17.

18.

20.

21.

22.

23.

24.

25.

26.

27.

28.

29.

30.

31.

32.

33.

Part No.

747-1214

747-1161A

746-1113

746-1132

746-1114

746-04048

749-1092A

710-1205

720-0279

710-1174

736-0451

720-0284

749-04037

725-0157

17098

731-2537

710-0599

682-3062A

712-0431

682-3063A

687-02046

710-0654A

754-04003

782-0585A

728-0199

750-04120

716-0198

618-04025

750-04119

731-0073

748-04016A

742-0742A

Part Description

Drive Control Handle

Blade Control Handle

Blade Control Cable - 37.75"

Blade Control Cable - 40.75"

Blade Control Cable- 50.5"

Drive Control Cable

Upper Handle

Eye Bolt

Wing Nut 1/4-20

Carriage Bolt 5/16-18 x 2.0

Shoulder Washer.320 ID x.93 OD

Wing Nut

Lower Handle

Cable Tie

Hinge Clip

Trail Shield

Hex Screw 1/4-20 x.500

Handle Bracket Assembly - RH

Lock Nut 3/8-16

Handle Bracket Assembly- LH

22" Deck Assembly

Hex Washer Screw 3/8-16 x 1.0

V-Belt

Forward Height Adjustment Plate - LH

Rivet

Sleeve Spacer.550 ID x 3.3

Retainer Ring

Transmission Assembly Complete

Sleeve Spacer.550 ID x 7.95

Transmission Cover

Blade Adapter

22" Mulching Blade

Ref.

No,

34.

35.

36.

38.

39.

40.

41.

42.

43.

45.

46.

47.

48.

49.

50.

51.

52.

53.

54.

55.

57.

58.

59.

60.

61.

62.

63.

64.

Part No.

736-0524A

710-1044

782-0584

710-0514

720-0426

682-0544

682-0545

731-2522

715-0221

717-1762

717-1761

634-0190

747-0710

732-1014

731-1034B

736-0270

17032A

710-0216

741-0717

732-0984B

687-02080

687-02079

738-1127

734-04082

631-04045

748-0390

716-0865

736-0105

712-0130

710-04121

732-04049

Part Description

Bell Blade Support

Hex Cap Screw 3/8-24 x 1.5

Forward Height Adjustment Plate - RH

Hex Cap Screw 3/8-16 x 1.00

Adjustment Knob

Spring Lever Assembly- RH (FWD)

Spring Lever Assembly- LH (FWD)

Wheel Dust Cover

Pin

Spur Gear 14T- RH

Spur Gear 14T- LH

Front Wheel 8 x 1.8

Hinge Pin

Torsion Spring

Side Discharge Assembly

Belt Washer.265 ID x.75 OD

Deflector Chute Adapter

Hex Cap Screw 3/8-16 x.75

Thrust Bearing.688 ID x 1.938 OD

Spring Lever

Rear Pivot Arm Assembly - RH

Rear Pivot Arm Assembly - LH

Shoulder Screw 3/8-16

Rear Wheel 12 x 1.8

Snap Mulching Plug

Bearing Support Spacer

Snap Ring.500

Bell Washer.375 x.870 x.063

Hex Lock Nut 3/8-16

Screw (Included with Item #29)

Extension Spring.47 OD x 2.50

17

NOTES

18

NOTES

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"warrants this product against defects in material and

workmanship for a period of two (2) years commencing on the

date of original purchase and wilt, at its option, repair or

replace, free of charge, any part found to be defective in

materials or workmanship. This limited warranty shall only

apply if this product has been operated and maintained in

accordance with the Operator's Manual furnished with the

product, and has not been subject to misuse, abuse,

commercial use, neglect, accident, improper maintenance,

alteration, vandalism, theft, fire, water, or damage because of

other peril or natural disaster. Damage resulting from the

installation or use of any part, accessory or attachment not

approved by MTD for use with the product(s) covered by this

manual will void your warranty as to any resulting damage.

Normal wear parts are warranted to be free from defects in

material and workmanship for a period of thirty (30) days from

the date of purchase. Normal wear parts include, but not

limited to items such as: batteries, belts, blades, blade

adapters, grass bags, rider deck wheels, seats, snow thrower

skid shoes, shave plates, auger spiral rubber and tires.

HOW TO OBTAIN SERVICE: Warranty service is available,

WITH PROOF OF PURCHASE, through your local authorized

service dealer. To locate the dealer in your area, check your

Yellow Pages, or contact MTD LLC at P.O. Box 361131,

Cleveland, Ohio 44136-0019, or call 1-800-800-7310 or 1-

330-220-4683 or tog on to our Web site at

www.mtdproducts.com.

This limited warranty does not provide coverage in the

following cases:

a,

b,

C.

d,

The engine or component parts thereof. These items

may carry a separate manufacturer's warranty. Refer

to applicable manufacturer's warranty for terms and

conditions.

Log splitter pumps, valves, and cylinders have a

separate one year warranty.

Routine maintenance items such as lubricants, filters,

blade sharpening, tune-ups, brake adjustments, clutch

adjustments, deck adjustments, and normal

deterioration of the exterior finish due to use or

exposure.

Service completed by someone other than an

authorized service dealer.

e,

f,

g.

MTD does not extend any warranty for products sold or

exported outside of the United States, its possessions

and territories, except those sold through MTD's

authorized channels of export distribution.

Replacement parts that are not genuine MTD parts.

Transportation charges and service calls.

No implied warranty, including any implied warranty of

merchantability of fitness for a particular purpose,

applies after the applicable period of express written

warranty above as to the parts as identified. No other

express warranty, whether written or oral, except as

mentioned above, given by any person or entity,

including a dealer or retailer, with respect to any product,

shall bind MTD. During the period of the warranty, the

exclusive remedy is repair or replacement of the product

as set forth above.

The provisions as set forth in this warranty provide the

sole and exclusive remedy arising from the sale. MTD

shall not be liable for incidental or consequential loss or

damage including, without limitation, expenses incurred

for substitute or replacement lawn care services or for

rental expenses to temporarily replace a warranted

product.

Some states do not allow the exclusion or limitation of

incidental or consequential damages, or limitations on how

long an implied warranty lasts, so the above exclusions or

limitations may not apply to you.

In no event shall recovery of any kind be greater than the

amount of the purchase price of the product sold. Alteration

of safety features of the product shall void this warranty.

You assume the risk and liability for toss, damage, or injury to

you and your property and/or to others and their property

arising out of the misuse or inability to use the product.

This limited warranty shall not extend to anyone other than the

original purchaser or to the person for whom it was purchased

as a gift.

HOW STATE LAW RELATES TO THIS WARRANTY: This

limited warranty gives you specific legal rights, and you may

also have other rights which vary from state to state.

IMPORTANT: Owner must present Original Proof of

Purchase to obtain warranty coverage.

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