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Safety • Assembly • Operation • Tips & Techniques • Maintenance • Troubleshooting • Parts Lists • Warranty OPERATOR’S MANUAL Rear Tine Tiller – Model Series 450 IMPORTANT READ SAFETY RULES AND INSTRUCTIONS CAREFULLY BEFORE OPERATION 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 . PRINTED IN U.S.A FORM NO . 769 - 02193A MTD LLC , P.O . BOX 361131 CLEVELAND , OHIO 44136 - 0019 12 / 2006
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This Operator’s Manual is an important part of your new tiller . It will help you assemble , prepare , and maintain the unit for best performance . Please read and understand what it says . Table of Contents Safety Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Maintaining Your Tiller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Safe Operation Practices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Off Season Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Assembling Your Tiller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Know Your Tiller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 Operating Your Tiller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Making Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Back Cover Finding and Recording Model Number BEFORE YOU BEGIN ASSEMBLING YOUR NEW EQUIPMENT , please locate the model plate on the equipment Model Number Serial Number and copy the information to the sample model plate provided to the right . You can locate the model plate by looking at the rear of the tine shield . This information is important for use when visiting the manufacturer’s web site , obtaining assistance from the Customer Support Department , or when communicating with an authorized service dealer . Customer Support Please do NOT return the unit to the retailer from which it was purchased , without first contacting Customer Support . 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 : mtdproducts.com . Click on the Service & Support menu option . 1 . Visit 2 . Phone a Customer Support Representative at 1 ( 800 ) 800 - 7310 . 3 . The engine manufacturer is responsible for all engine - related issues with regards to performance , power - rating , specifica - tions , warranty and service . Please refer to the engine manufacturer’s Owner’s / Operator’s Manual , packed separately with your unit , for more information .
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1 Safety Labels WARNING Hot surfaces can cause severe burns . Do not touch S30647 muffler or WARNING adjacent areas . This symbol points out important safety instructions which , if not followed , could WARNING WARNING endanger the personal TO AVOID SERIOUS INJURY C 1 . READ THE OPERATOR'S MANUAL . DEPTH . KNOW LOCATION AND FUNCTIONS U safety and / or property OF ALL CONTROLS . STAKE T 3 . KEEP ALL SAFETY DEVICES AND of yourself and others . SHIELDS IN PLACE AND WORKING . 4 . NEVER ALLOW CHILDREN OR TRANSPORT UNINSTRUCTED ADULTS TO Read and follow all O OPERATE TILLER . 1 " 5 . SHUT OFF ENGINE BEFORE 3 " U U NCLOGGING TINES OR MAKING instructions in this 5 " 7 " REPAIRS . T 6 . KEEP BYSTANDERS AWAY FROM manual before at - M ACHINE . . KEEP AWAY FROM ROTATING KEEP AWAY FROM PARTS . tempting to operate ROTATING TINES . 8 . USE EXTREME CAUTION WHEN ROTATING TINES R EVERSING OR PULLING THE this machine . Failure M ACHINE TOWARDS YOU . WILL CAUSE INJURY . S3 146 to comply with these instructions may result in personal injury . When you see this symbol . HEED ITS 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 . 3
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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 Safe feet and throwing objects . Failure to observe the following safety instructions could result in Operation serious injury or death . Practices • Never remove gas cap or add fuel while the engine Training is hot or running . • Read , understand , and follow all instructions on the • Allow engine to cool at least two minutes before machine and in the manual ( s ) before attempting to refueling assemble and operate . Keep this manual in a safe • Never over fill fuel tank . Fill tank to no more than ½ place for future and regular reference and for ordering inch below bottom of filler neck to provide space for replacement parts . fuel expansion . • Be familiar with all controls and their proper operation . • Replace gasoline cap and tighten securely . Know how to stop the machine . • If gasoline is spilled , wipe it off the engine and • Never allow children under 14 years old to operate equipment . Move machine to another area . Wait five this machine . Children 14 years old and over should minutes before starting the engine . read and understand the operation instructions and WARNING safety rules in this manual and should be trained and Never store the machine or fuel container inside • supervised by a parent . near an open flame , spark or pilot light ( e.g . furnace , This symbol points out water or space heater , clothes dryer , etc . ) . • Never allow adults to operate this machine without important safety in - proper instruction . • Allow machine to cool five minutes before storing . structions which , if not • Keep bystanders , helpers , pets , and children at least Operation followed , could endanger 75 feet from the machine while it is in operation . Stop • Do not put hands or feet near rotating parts . Contact the personal safety and / or machine if anyone enters the area . with the rotating parts can amputate hands and feet . property of yourself and Preparation • Do not operate machine while under the influence of others . Read and follow all • Thoroughly inspect the area where the equipment is alcohol or drugs . instructions in this manual to be used . Remove all stones , sticks , wire , and other • Never operate this machine without good visibility or before attempting to oper - foreign objects which could be tripped over and cause light . Always be sure of your footing and keep a firm ate this machine . Failure personal injury . hold on the handles . to comply with these • Wear sturdy , rough - soled work shoes and close • Keep bystanders , helpers , pets , and children at least instructions may result in fitting slacks and shirt . Loose fitting clothes or jewelry 75 feet from the machine while it is in operation . personal injury . When you can be caught in movable parts . Never operate this Stop the machine if anyone enters the area . see this symbol , HEED machine in bare feet or sandals . ITS WARNING ! • Be careful when tilling in hard ground . The tines may • Disengage clutch levers and shift ( if provided ) into catch in the ground and propel the tiller forward . neutral ( “ N � ) before starting the engine . If this occurs , let go of the handle bars and do not • Never leave this machine unattended with the engine restrain the machine . running . • Exercise extreme caution when operating on or • Never attempt to make any adjustments while engine crossing gravel surfaces . Stay alert for hidden is running , except where specifically recommended in hazards or traffic . the operator’s manual . • Never operate the machine at high transport speeds • To avoid personal injury or property damage use on hard or slippery surfaces . extreme care in handling gasoline . Gasoline is • Exercise caution to avoid slipping or falling . extremely flammable and the vapors are explosive . • Look down and behind and use care when in reverse Serious personal injury can occur when gasoline is or pulling machine towards you . spilled on yourself or your clothes which can ignite . • Start the engine according to the instructions found Wash your skin and change clothes immediately . in this manual and keep feet well away from the tines • Use only an approved gasoline container . at all times . • Extinguish all cigarettes , cigars , pipes and other sources of ignition . • Never fuel machine indoors . 4
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• After striking a foreign object , stop the engine , Maintenance & Storage disconnect the spark plug wire and ground against • Never tamper with safety devices . Check their the engine Thoroughly inspect the machine for any proper operation regularly . damage . Repair the damage before starting and • Check bolts and screws for proper tightness at operating . frequent intervals to keep the machine in safe • Disengage all clutch levers ( if fitted ) and stop engine working condition . Also , visually inspect machine before you leave the operating position ( behind the for any damage . handles ) . Wait until the tines come to a complete Safe • Before cleaning , repairing , or inspecting , stop the stop before unclogging the tines , making any adjust - engine and make certain the tines and all moving ments , or inspections . Operation parts have stopped . Disconnect the spark plug • Never run an engine indoors or in a poorly ventilated wire and ground it against the engine to prevent area . Engine exhaust contains carbon monoxide , an Practices unintended starting . odorless and deadly gas . • Do not change the engine governor settings or • Muffler and engine become hot and can cause a over - speed the engine . The governor controls the burn . Do not touch . maximum safe operating speed of the engine . • Use caution when tilling near fences , buildings and • Maintain or replace safety and instruction labels , underground utilities . Rotating tines can cause as necessary . property damage or personal injury . • Follow this manual for safe loading , unloading , • Do not overload machine capacity by attempting to transporting , and storage of this machine . till soil too deep at too fast of a rate . • Never store the machine or fuel container inside • If the machine should start making an unusual noise where there is an open flame , spark or pilot light or vibration , stop the engine , disconnect the spark such as a water heater , furnace , clothes dryer , etc . plug wire and ground it against the engine . Inspect WARNING • Always refer to the operator’s manual for proper thoroughly for damage . Repair any damage before instructions on off - season storage . starting and operating . • If the fuel tank has to be drained , do this outdoors . This symbol points out • Keep all shields , guards , and safety devices in place important safety in - • Observe proper disposal laws and regulations for and operating properly . structions which , if not gas , oil , etc . to protect the environment . • Never pick up or carry machine while the engine is followed , could endanger Your Responsibility running . the personal safety and / or • Restrict the use of this power machine to persons • Use only attachments and accessories approved property of yourself and who read , understand , and follow the warnings and by the manufacturer . Failure to do so can result in others . Read and follow all instructions in this manual and on the machine . personal injury . instructions in this manual • The safety labels on the tiller are shown in the • If situations occur which are not covered in this before attempting to oper - “ Safety Labels � section . To ensure safe operation manual , use care and good judgment . Contact your ate this machine . Failure of the tiller , follow the instructions on all labels dealer or call the customer service number found on to comply with these closely . page two . instructions may result in personal injury . When you see this symbol , HEED ITS WARNING ! 5
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NOTE : References to right or left side of the tiller are Hex Bolt determined from behind the unit in the operating position . Flat Washer Hairpin Clip T - Knob To Remove Unit From Carton • Remove staples , break glue on top flaps , or cut tape 3 Clevis Pin at carton end and peel along top flap to open carton . • Remove loose parts included with unit ( i.e . , Assembling operator’s manual , etc . ) . • Cut corners and lay carton down flat . Your Tiller • Remove packing material . • Roll or slide unit out of carton . Check carton thoroughly for loose parts . Depth Stake • Extend control cable and lay on the floor . Be careful not to bend or kink control cable . IMPORTANT : This unit is shipped without gasoline or oil in the engine . Be certain to service engine with gasoline and oil as instructed in the separate engine manual before operating your machine . Figure 3 - 1 Loose Parts In Carton WARNING • Depth Stake Handle Remove • Handle Assembly Assembly Disconnect the spark • Shift Rod plug wire and ground NOTE : All hardware needed for assembly is attached Handle to the loose parts or the tiller . it against the engine Bracket to prevent unintended Before Assembly starting . WARNING : Disconnect the spark plug wire and ground it against the engine to Be certain to check prevent unintended starting . the clutch cable Attaching Depth Stake adjustment before • Tip the tiller forward so it rests on front counterweight . operating the tiller . • Unthread the “ T � knob from the top of the depth stake and remove the flat washer and hex bolt . Remove the hairpin clip from the clevis pin . See Figure 3 - 1 . • Raise the tine shield hinge flap assembly and insert the depth stake assembly in the slot ( under the tine shield ) and up through the tine shield assembly . Figure 3 - 2 • Insert clevis pin through the tine shield and depth • Remove threaded eyebolt and nut from the cable end . stake assemblies . Secure with hairpin clip . • Route the clutch cable to the right side of the handle • Insert a hex bolt into top hole of the depth stake mounting brackets and underneath the handle . assembly . Place flat washer on the hex bolt and thread “ T � knob onto the hex bolt . Tighten securely . • Push the cable through the hole in the center of the See Figure 3 - 1 . handle and snap in the plastic fitting . See Figure 3 - 3 . • Tip the tiller back down so it rests on the tines . • Remove slot head screw , nut , and two flat washers from the clutch bail . See Figure 3 - 4 . Attaching Handle Assembly • Fasten the threaded eyebolt onto bail by securing from • Remove top two bolts and flange lock nuts from top with slot head screw , flat washers and lock nut . handle mounting brackets , but do not remove the • Thread eyebolt and nut removed earlier into the bottom bolt and nut . See Figure 3 - 2 . internally threaded tube at the end of the cable . • Place handle assembly in position between the Thread engagement should be about 3 / 4 � . Tighten nut handle mounting brackets . NOTE : Specifications are against tube at end of cable . See Figure 3 - 4 . • Line up holes in handle with holes in bracket and subject to change without NOTE : Do not overtighten clutch cable . Too much secure with hardware previously removed . notification or obligation . tension may cause it to break . Images my not reflect your Attaching Clutch Cable WARNING : Be certain to check the clutch exact model and are for Attach the clutch cable to the handle as follows : cable adjustment before operating the reference purposes only . ( be careful not to kink the cable ) tiller . 6
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Attaching Control Rod Slot Head Screw , Nut , & Flat Washers • Make sure the handle assembly is in the highest position . Refer to Know Your Tiller section . Internally • Remove hairpin clips from control rod , ( rubber Threaded Tube 3 washers to remain on control rod ) . • Insert the shorter , ( angled ) , end of the control rod through the indicator bracket on the shift cover and Assembling secure with hairpin clip that was previously removed . See Figure 3 - 5 . Your Tiller • Insert the longer end of the control rod through the hole in the gear selector handle and secure with hairpin clip . Final Clutch Adjustment IMPORTANT : Service the engine with oil and gasoline before checking this adjustment . Refer to the separate Plastic Fitting engine manual packed with your tiller for proper fuel and engine oil recommendations . Figure 3 - 3 Position the tiller so the front counterweight is against a solid object , such as a wall . With the gear selection WARNING lever in NEUTRAL , start the engine . Refer to the Slot Head Screw separate engine manual . Clutch Control Flat Washers Do not put your Standing on the right side of the tiller , examine the belt fingers under the ( inside the belt cover ) . It should not be turning . Nut belt cover . WARNING : Do not put your fingers under Threaded Eyebolt the belt cover . Maximum tire pressure under any Nut If the belt turns without bail engaged , adjust by circumstances is unthreading the internally threaded tube at the end 30 p.s.i . Equal tire of the cable a few turns clockwise ( when standing in pressure should be operator’s position ) and then retighten the nut against the tube . maintained on both Now move the shift lever to FORWARD position . Internally tires . Carefully engage the clutch by lifting the clutch control Threaded Tube bail against the handle . The wheels should spin . If the wheels do not spin with the unit in forward , adjust by unthreading the tube at the end of the cable a few turns counter - clockwise ( when standing in operator’s Figure 3 - 4 position ) and then retighten the nut against the tube . Recheck both adjustments , and readjust as necessary . NOTE : A secondary cable adjustment is available if you reach the point that additional adjustment is needed . Control Rod Remove the belt cover and move the hex nuts at the Rubber Washer other end of the cable towards the end of the casing . Indicator Bracket Then readjust the hex nuts at the handle . Tire Pressure Hairpin Clip The tires on your unit may be over - inflated for shipping purposes . Reduce the tire pressure before operating the unit . Recommended operating tire pressure is approximately 20 p.s.i . ( check sidewall of tire for tire manufacturer’s recommended pressure ) . NOTE : Specifications are subject to change without WARNING : Maximum tire pressure under any circumstances is 30 p.s.i . Equal tire notification or obligation . Idler Pulley Rod pressure should be maintained on both Images my not reflect your tires . exact model and are for reference purposes only . Figure 3 - 5
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Clutch Control 4 Gear Selection Handle Know Your Handle Adjustment Lock Tiller Depth Stake WARNING Make certain unit is in NEUTRAL when starting the engine . Figure 4 - 1 IMPORTANT : Use the reverse tine drive when tilling Gear Selection Handle virgin ground , sod , or hard soil . Use the forward tine drive The gear selection handle is located in the center of when cultivating or tilling soft ground . the handle on the tiller . It is used to select NEUTRAL , NOTE : If difficulty is encountered in moving the gear REVERSE , or one of the FORWARD mode . Pull or push selection handle , refer to following helpful hints . To shift the handle so that the indicator on top of shift cover into forward or reverse wheel drive , move tiller forward points to the operating mode desired . See Figure 4 - 1 . slightly then backward to allow the gears to synchronize . Neutral To shift into forward wheels and tine drive , push forward Transmission is in neutral . slightly on the gear selection handle and slowly engage Reverse the clutch control allowing the gears to synchronize . To Reverse wheel drive . stop forward movement and tine drive , release the clutch Forward Modes control . Do not shift gears with the clutch control engaged Wheels Forward : Forward wheel drive only . except when engaging the tines . Tines Reverse : Forward wheel drive and reverse tine WARNING : Make certain unit is in NEUTRAL drive . when starting the engine . Tines Forward : Forward wheel and tine drive . NOTE : Specifications are subject to change without notification or obligation . Images my not reflect your exact model and are for reference purposes only . 8
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Clutch Control The clutch control is located beneath the handle . Squeezing the clutch control against the handle engages the wheel and tine drive mechanisms . 4 NOTE : Never engage clutch lever while shifting . Know Your Handle Adjustment Lock The handle may be adjusted to the height desired . Tiller Loosen the handle height adjustment lock a few turns . Pivot handle up or down to desired position . Tighten lock . Throttle Control The throttle control lever is located on the engine . It controls the engine speed and stops the engine . Choke Lever ( If Equipped ) The choke lever is located by the throttle . It is used to enrich the fuel mixture in the carburetor when starting a cold engine . WARNING Primer Button ( If Equipped ) This symbol points The primer button is located behind the air cleaner . It is out important safety used to enrich the fuel mixture in the carburetor when instructions which , if starting a cold engine . not followed , could Depth Stake endanger the personal The depth stake controls the tilling depth . Refer to safety and / or property ‘ ‘ Setting the Depth ’ ’ in the Operating Section . of yourself and others . Engine Controls Read and follow all See the separate engine manual for additional informa - instructions in this man - tion and functions of the engine controls . ual 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 ! NOTE : Specifications are subject to change without notification or obligation . Images my not reflect your exact model and are for reference purposes only . 9
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WARNING : Read , understand , and follow Setting The Depth all instructions and warnings on the ma - Tilling depth is controlled by the depth stake which can be chine and in this manual before operating . adjusted to five different settings . Adjust the side shields as you adjust the depth stake . Before Starting 5 WARNING : Be certain spark plug wire is Gas And Oil Fill - Up disconnected and grounded against the Service the engine with gasoline and oil as instructed in Operating engine when performing any adjustments . the separate engine manual packed with your tiller . Read instructions carefully . • When using the tiller for the first time , use the second Your Tiller adjustment hole from the top ( 1 � of tilling depth ) . See WARNING : Use extreme care when Figure 5 - 1 . handling gasoline . Gasoline is extremely flammable and the vapors are explosive . • When breaking up sod and for shallow cultivation , use Never fuel machine indoors or while the Use This Position engine is hot or running . Transport Postion First Time 1 � Starting Engine 3 � NOTE : When pushing the unit with the engine off , you Clevis Pin 5 � will hear a ratcheting sound ( gear noise ) which is normal . 7 � WARNING : Be sure no one is standing in front of the tiller while the engine is running WARNING or being started . Read , understand , • Place gear selection lever in NEUTRAL . and follow all instruc - • Place the throttle control lever in FAST position or tions and warnings if equipped , place the engine speed control in the START position . on the machine and • Move choke lever to CHOKE position or if equipped , in this manual before push primer two ( 2 ) or three ( 3 ) times . Wait about two operating . ( 2 ) seconds between each push . Use This Hole for Use extreme care Lowest ( shallowest ) NOTE : A warm engine may not require choking or priming . Postion when handling Side Sheild • Stand at side of tiller . Grasp the starter handle and pull gasoline . Gasoline is out slowly , until it pulls slightly harder . Let rope rewind extremely flammable slowly . and the vapors are • Pull starter handle rapidly . Do not allow handle to snap explosive . Never fuel back . Allow it to rewind slowly while keeping a firm hold on the starter handle . machine indoors or while the engine is • Repeat previous steps until engine starts . Use This Hole for hot or running . • As engine warms up and begins to operate evenly , Highest ( deepest ) move choke lever gradually to RUN position . If engine Postion Be sure no one is falters , return to choke position , then slowly move to standing in front of RUN position . Figure 5 - 1 the tiller while the • Refer to engine manual for additional engine informa - engine is running or tion . the setting which gives 1 � of tilling depth ( second hole being started . from the top ) . Place the side shields in their lowest NOTE : After starting and prior to using the tiller for the position . first time , be certain to check the clutch adjustment as Be certain spark described in “ Checking the Clutch Adjustment � section of • For further depth , raise the depth stake and side plug wire is discon - the Assembly Instructions . shields and also make one or two more passes over nected and grounded the area . To Stop Engine against the engine • When tilling loose soil , the depth stake may be raised • Move throttle control to STOP or OFF position . when performing any to its highest position ( use bottom adjustment hole ) to • Disconnect spark plug wire and ground to prevent adjustments . give the deepest tilling depth . Raise the side shields to accidentally starting while equipment is unattended . their highest position . NOTE : After the first ten hours of operation , recheck • To transport tiller , lower the depth stake ( use top the clutch adjustment . Refer to final clutch adjustment in adjustment hole ) . Assembly Instructions . 10
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To adjust the depth stake , remove the clevis pin and hairpin Belt Tension Adjustment clip . Move the depth stake to the desired setting and Periodic adjustment of the belt tension may be required secure with the clevis pin and hairpin clip . See Figure 5 - 1 . due to normal stretch and wear on the belt . Adjustment To adjust the side shields , remove the wing nuts . Move is needed if the tines or wheels seem to hesitate while 6 the side shield to the desired position and replace the turning , but the engine maintains the same speed . wing nuts . Tighten securely . To adjust the tension on the belt , refer to Final Clutch Making Adjustment in Assembly Instructions . Operating the Tiller • Select the depth stake setting . After belt tension has been adjusted , if the belt is Adjustments excessively stretched , you may need to adjust the idler • Start engine as instructed on the previous page . pulley rod . This can easily be checked . • Move gear selection handle to one of the forward With the engine off and the clutch control bail disen - modes or reverse . gaged , shift the gear selection handle to each forward WARNING : Do not move the gear selection mode . If the indicator bracket touches the idler pulley handle with the wheels or tines engaged . rod ( with the clutch control bail disengaged ) , then an Make certain the unit is stopped com - adjustment is necessary . pletely before changing the gear selection . A partial engagement may be necessary • Disconnect and ground out spark plug wire against when engaging tines . the engine . • Remove the belt cover as described under Belt IMPORTANT : Use the reverse tine drive when tilling WARNING Replacement in the Maintenance section . virgin ground , sod , or hard soil . Use the forward tine drive when cultivating or tilling soft ground . • Remove the hairpin clip and spring washer from the Do not move the gear idler pulley rod . Refer to Figure 9 . • Squeeze the clutch handle against the handle to selection handle engage the wheels and tines . • Move the idler pulley rod to the lower hole in the idler with the wheels or bracket . NOTE : Make certain the gear selection indicator is tines engaged . Make correctly positioned before engaging the clutch handle . If • Replace the spring washer and hairpin clip . certain the unit is it is between gears , the engine will stall . • Check clearance of the idler pulley rod to the stopped completely indicator bracket by shifting to each forward mode , To transport tiller , do not engage the tines . Select the before changing the as before . wheel drive only . gear selection . A WARNING : Do not push down on the Engine Adjustment partial engagement handles so that the wheels are lifted off Refer to the separate engine manual for engine adjust - may be necessary the ground while using the tine drive , or ment instructions . when engaging tines . the tiller could move backward and cause personal injury . Do not push down For best results , it is recommended the garden be tilled on the handles so twice ( lengthwise , then width - wise ) to pulverize the soil . that the wheels are Making Adjustments lifted off the ground WARNING : Never attempt to make any while using the tine adjustments while the engine is running , drive , or the tiller except where specified in operator’s could move backward manual . and cause personal Handle Adjustment injury . The handle height may be adjusted to the desired height . Never attempt to Refer to the handle adjustment in Know Your Tiller make any adjust - section . ments while the engine is running , except where speci - fied in operator’s NOTE : Specifications are subject to manual . change without notification or obligation . Images my not reflect your exact model and are for reference purposes only . 11
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WARNING : Disconnect the spark plug Cleaning Tine Area wire and ground it against the engine Clean the underside of the tine shield after each use . before performing any repairs . The dirt washes off the tines easier if rinsed off im - mediately instead of after it dries . Always towel dry the Engine tiller afterwards and apply a light coat of oil or silicone to Refer to the separate engine manual for engine prevent rusting or water damage . maintenance instructions . Maintaining IMPORTANT : Never use a “ pressure washer � to clean Maintain engine oil as instructed in the separate your tiller . Water can penetrate tight areas of the tiller and engine manual packed with your unit . Read and follow Your Tiller its chain case and cause serious damage to the unit . instructions carefully . Service air cleaner every ten hours under normal Belt Replacement conditions . Clean every hour under extremely dusty Your tiller has been engineered with a belt made of special conditions . Poor engine performance and flooding material ( Kevlar Tensile ) for longer life and better perfor - usually indicates that the air cleaner should be serviced . mance . It should not be replaced with an off - the - shelf belt . To service the air cleaner , refer to the separate engine Order all belts through you authorized service dealer . manual packed with your unit . • Disconnect and ground the spark plug wire against the IMPORTANT : Never run your engine without air cleaner engine . completely assembled . • Remove the belt cover from the left side of the tiller by WARNING The spark plug should be cleaned and the gap remove two torx screws from the top of belt cover . See reset every 25 hours of engine operation . Spark plug Figure 7 - 1 . replacement is recommended at the start of each tiller Disconnect the spark Belt Cover Torx Screws season ; check engine manual for correct plug type and plug wire and ground gap specification . it against the engine Clean the engine regularly with a cloth or brush . Keep before performing the cooling system ( blower housing area ) clean to any repairs or permit proper air circulation which is essential to engine Hex Cap Nut & maintenance . performance and life . Be certain to remove all dirt and Flat Washer combustible debris from muffler area . Lubrication Transmission The transmission is pre - lubricated and sealed at the factory . It requires no checking unless the transmission Self Tap Screw is disassembled . To fill with grease , lay the right half of the transmission on its side , add 22 ounces of Benalene 920 grease , and assemble the left half to it . This grease Figure 7 - 1 can be obtained at your nearest authorized dealer by • Remove the hex cap nut and flat washer from the side ordering part number 737 - 0300 . of the belt cover and remove the self tap screw at the Clutch Handle bottom of the front of the cover . Lubricate the pivot point on the clutch handle and the cable at least once a season with light oil . The control must operate freely in both directions . Pivot Points Lubricate all pivot points and linkages at least once a season with light oil . Tine Shafts Remove tine assemblies and lubricate the tine shafts at least once a season . NOTE : Specifications are Wheel Shafts subject to change without Remove wheel assemblies and lubricate the axle shafts notification or obligation . at least once a season . Images my not reflect your exact model and are for reference purposes only . 1
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• Remove the belt keeper bracket located behind the Idler Pulley Rod engine pulley by removing two hex bolts and lock washers . See Figure 8 - 1 . • Remove belt and reassemble new belt . Follow 8 instructions in reverse order . NOTE : Upon reassembly , make certain the belt is routed over the idler pulley and inside of belt keepers by Off - Season engine pulley . See Figure 8 - 1 . Storage Off - Season Storage If the tiller will not be used for a period longer than 30 days , Belt Keeper the following steps should be taken to prepare the tiller for Bracket Idler Bracket storage . Engine Pulley • Clean the exterior of engine and the entire tiller thoroughly . Lubricate the tiller as described in the Figure 8 - 1 lubrication instructions . • We do not recommend the use of pressure washers to clean your unit . They may cause damage to electric components , spindles , pulleys , bearings or When storing any type the engine . The use of pressure washers will result in shortened life and reduce serviceability . of power equipment • Refer to the engine manual for correct engine in an unventilated or storage instructions . metal storage shed , • Wipe tines with oiled rag to prevent rust . care should be taken • Store tiller in a clean , dry area . Do not store next to to rustproof the corrosive materials , such as fertilizer . equipment . Using a NOTE : When storing any type of power equipment in an light oil or silicone , unventilated or metal storage shed , care should be taken coat the equipment and to rustproof the equipment . Using a light oil or silicone , coat especially any springs , the equipment and especially any springs , bearings , and bearings , and cables . cables . NOTE : Specifications are subject to change without notification or obligation . Images my not reflect your exact model and are for reference purposes only . 13
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16 13 35 29 46 53 16 52 31 35 28 17 45 12 44 17 33 36 6 15 3 27 5 1 18 10 36 43 42 47 34 4 23 40 7 21 22 32 36 20 8 37 50 25 51 10 9 24 34 36 26 41 45 36 35 19 49 16 44 29 33 14 2 14 14 48 35 16 28 11 14 35 16 14
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9 Illustrated Ref . Part No . Part Description Ref . Part No . Part Description Parts List 1 . 611 - 04074 Wheel Shaft Ass’y 33T 27 . 717 - 1594 Spur Gear 16T 28 . 721 - 0378 Seal 1.0 Shaft 2 . 611 - 0021 Tine Shaft Ass’y : 18T 29 . 721 - 0379 Seal . 75 Shaft Model 450 3 . 611 - 0128 Jack Shaft Ass’y 31 . 726 - 0277 Taper Cap Ring 4 . 611 - 0129 Input Shaft Ass’y Series 32 . 732 - 0496 Compression Spring . 50 � Leg . 5 . 617 - 0058 Rev . Idler Gear Ass’y : 30T 33 . 736 - 0163 Thrust Wash . 1.03 � I.D . X . 1.62 � 6 . 617 - 0059 Tine Idler Gear Ass’y : 30T 34 . 736 - 0351 Fl - Wash . 76 � I.D . x 1.5 � O.D . 7 . 617 - 0060 Tine Input Sprocket Ass’y : 9T 35 . 736 - 0407 Bell - Wash . 45 � I.D . x 1.0 � 8 . 617 - 0061 Wheel Input Sprocket Ass’y : 10T 36 . 736 - 0518 Thrust Wash . . 445 x 1.92 x . 060 9 . 617 - 0062 Gear Ass’y : 11T 37 . 736 - 3088 Fl - Wash . . 635 � I.D . x 1.59 O.D . 10 . 686 - 0108 R.H . Housing Ass’y To order replacement 40 . 738 - 0645 Detent Shaft 1 / 2 � Dia . 11 . 710 - 0376 Hex Bolt 5 / 16 - 18 x 1 � Lg . parts , contact 41 . 738 - 0648 Jack Shaft . 625 x 2.385 12 . 710 - 0599 Hex S - Tap Scr . 1 / 4 - 20 x . 5 � 1 ( 800 ) 800 - 7310 42 . 738 - 1013 Jack Shaft . 625 x 5.0 13 . 710 - 0604A Hex S - Tap Scr . 5 / 16 - 18 x . 625 � or visit 43 . 741 - 0124 Ball Bearing 14 . 710 - 3008 Hex Bolt 5 / 16 - 18 x . 75 � www.mtdproducts.com 44 . 741 - 0420 Flange Bearing 1.0 x 2.5 x 1.38 15 . 711 - 1349 Input Shaft 45 . 741 - 0421 Flange Bearing . 75 x 2.5 x 1.38 16 . 712 - 0378 Hex Nut 7 / 16 - 20 46 . 741 - 0563 Ball Bearing . 6692 x 5745 x . 466 17 . 712 - 3004A Flange Nut 5 / 16 - 18 47 . 741 - 0862 Detent Ball . 250 18 . 713 - 0367 # 420 Chain 1 / 2 Pitch x 50 Links 48 . 750 - 0258 Spacer . 315 19 . 713 - 0484 # 50 Chain 5 / 8 Pitch x 54 Links 49 . 750 - 0570 Spacer 1.0 I.D x 2.0 O.D . x . 440 20 . 716 - 0865 Snap Ring 50 . 750 - 0664 Spacer . 505 I.D . x . 88 O.D . x . 440 21 . 717 - 0853 Shifting Fork 51 . 750 - 0671 Spacer . 75 x 2.0 x . 50 22 . 717 - 1582 Spur Gear 44T 52 . 786 - 0171 L.H . Chain Case Ass’y 23 . 717 - 1583 Spur Gear 30T 53 . 786 - 0238 Gear Positioner Bracket 24 . 717 - 1584 Spur Gear 30T 686 - 0107 Gear Case Assembly Complete 25 . 717 - 1585 Spur Gear 44T 26 . 717 - 1587 Spur Gear 44T 15
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12 67 15 12 2 70 22 70 69 60 61 68 5 10 17 23 19 18 7 20 1 3 11 8 60 14 6 16 4 61 34 62 37 9 64 25 27 30 21 39 26 38 63 27 32 36 33 31 26 24 42 46 29 49 28 66 44 26 30 41 30 44 26 40 35 50 59 51 53 65 71 58 55 56 54 57 16
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Ref . Part No . Part Description Ref . Part No . Part Description 1 . 747 - 1152 Shift Rod 35 . 786 - 0090 Shoulder 2 . 649 - 0041 Upper Handle Ass’y 36 . 786 - 0113 Tine Shield Hinge Flap 9 3 . 649 - 0034 Lower Handle Ass’y 37 . 786 - 0176 RH Handle Bracket 4 . 710 - 3005 Hex Screw 3 / 8 - 16 x 1.25 38 . 786 - 0177 LH Handle Bracket 5 . 710 - 3056 Hex Screw 5 / 16 - 18 x 3.25 39 . 786 - 0178 Tine Shield 6 . 711 - 0415 Clevis Pin 3 / 8 - 1.62 40 . 786 - 0179 Tine Shield Bracket Illustrated 7 . 712 - 0379 Flange Lock Nut 3 / 8 - 24 41 . 786 - 0180 Shoulder Spacer Bracket Parts List 8 . 712 - 0429 Hex Lock Nut 5 / 16 - 18 42 . 686 - 0109 Shift Crank Ass’y 9 . 714 - 0147 Cotter Pin 44 . 710 - 1017 Screw 1 / 4 - 14 x . 625 10 . 720 - 0313 Grip 46 . 715 - 0120 Spiral Pin 3 / 16 x 1.0 Model 450 11 . 720 - 0210A T - Knob 49 . 784 - 0208C Shift Cover Series 12 . 720 - 0278A Foam Grip 50 . 711 - 0415 Clevis Pin 14 . 726 - 0317 Cable Tie 51 . 712 - 3054 Hex Nut 3 / 8 - 24 15 . 735 - 0246 Plug 53 . 742 - 0305 13 � Articulating Tine 16 . 736 - 0117 Flat Washer 3 / 8 ID x . 620 OD 54 . 738 - 0689 Shoulder Bolt 17 . 736 - 0242 Bell Washer . 340 ID x . 872 OD 55 . 736 - 0208 Flat Washer . 51 � ID x 1.50 � OD 18 . 738 - 0958 Shoulder Spacer 56 . 736 - 0253 Bell Washer . 515 � ID x 1.14 � OD To order replacement 19 . 784 - 0190 Handle Adjustment Crank 57 . 738 - 0688 Shoulder Bolt parts , contact 20 . 784 - 0191 Hex Nut Retainer Bracket 58 . 784 - 0160 Tine Adapter Ass’y 18 � 1 ( 800 ) 800 - 7310 21 . 786 - 0120 Depth Stake 59 . 714 - 0149B Internal Cotter Pin or visit 22 . 747 - 1219 Bail Clutch 60 . 735 - 0127 Rubber Washer www.mtdproducts.com 23 . 786 - 0181 Shift Lever Rod 61 . 714 - 0104 Cotter Pin 24 . 686 - 0044A Tine Shield Cover Ass’y 62 . 710 - 3022 Hex Screw 3 / 8 - 16 x 2.75 � 25 . 710 - 0176 Hex Cap Screw 5 / 16 - 18 x 2.75 63 . 736 - 0204 Flat Washer 26 . 710 - 3008 Hex Cap Screw 5 / 16 - 18 x . 750 64 . 712 - 04065 Flange Nut 3 / 8 - 16 27 . 710 - 3097 Carriage Bolt 3 / 8 - 16 x 1.0 65 . 736 - 0169 Lock Washer 28 . 712 - 0421 Wing Nut 66 . 712 - 3017 Hex Nut 3 / 8 - 16 29 . 736 - 0169 Lock Washer 3 / 8 67 . 710 - 0946 Truss Screw 1 / 4 - 20 x . 65 30 . 712 - 04063 Flange Nut 5 / 16 - 18 68 . 712 - 0324 Hex Lock Nut 1 / 4 - 20 31 . 726 - 0106 Cap Nut 69 . 726 - 0273 Battery Hose Clamp 5 / 16 32 . 738 - 0849 Hex Screw 5 / 16 - 18 x . 75 � 70 . 736 - 3090 Flat Washer . 260 ID x . 720 OD 33 . 747 - 0432 Rod 71 . 784 - 0161 Tine Adapter Plate 34 . 750 - 0885A Spacer . 322 x . 625 x 2.0 NOTE : Specifications are subject to change without notification or obligation . Images my not reflect your exact model and are for reference purposes only . 1
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18 9 1 1 6 8 6 13 3 8 40 1 14 5 11 4 15 4 0 1 5 16 38 4 35 41 43 36 3 39 34 33 Wheel shaft shown for reference only 31 3 9 18
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9 Ref . Part No . Part Description Ref . Part No . Part Description Illustrated 1 . 686 - 0111 Belt Cover Bracket Ass’y 23 . 756 - 0972 Inner Engine Pulley Half 2 . 710 - 0237 Hex Bolt 5 / 16 - 24 x . 62 � 24 . 756 - 1162 Input Pulley Parts List 3 . 710 - 0412 Hex Bolt 1 / 4 - 28 x . 75 � 25 . 786 - 0064A Idler Bracket 4 . 710 - 0520 Hex Washer Screw 3 / 8 - 16 x 1.50 � 26 . 786 - 0185 Belt Keeper Bracket Model 450 5 . 710 - 1039 Hex Bolt 3 / 8 - 24 x 1.0 27 . 786 - 0187 Shift Cover Bracket Series 6 . 710 - 0599 Hex Washer Screw 28 . 786 - 0193 Idler Belt Keeper 7 . 710 - 0723 Hex Cap Screw 3 / 8 - 16 x 1.25 29 . 634 - 04231 Wheel Assembly 16.0 x 4.6 x 8 8 . 712 - 0266 Lock Jam Nut 3 / 8 - 16 734 - 0808 Tire Only 16.2 x 4.6 9 . 712 - 0267 Hex Nut 5 / 16 - 18 30 . 634 - 04230 Wheel Rim Assembly 10 . 714 - 0104 Internal Cotter Pin 31 . 734 - 0255 Air Valve 11 . 736 - 0104 Hairpin Clip 32 . 710 - 0606 Hex Head Screw 1 / 4 - 20 To order replacement 12 . 736 - 0119 Lock Washer 5 / 16 � 33 . 712 - 04064 Flange Lock Nut 1 / 4 - 20 parts , contact 13 . 736 - 0176 Flat Washer . 25 ID x . 93 OD 34 . 710 - 0382 Hex Bolt 1 / 2 - 13 x 5.0 1 ( 800 ) 800 - 7310 14 . 736 - 0271 Spring Washer . 317 ID x . 625 OD 35 . 712 - 0206 Hex Nut 1 / 2 - 13 or visit 15 . 736 - 0329 Lock Washer 1 / 4 � ID 36 . 723 - 0381 Counterweight 40 lbs . www.mtdproducts.com 16 . 736 - 0452 Bell Washer . 396 ID x 1.14 OD 37 . 736 - 0326 Flat Washer 17 . 738 - 0876 Shoulder Nut 7 / 16 - 20 38 . 736 - 0921 Lock Washer 1 / 2 18 . 746 - 1117 Clutch Cable 39 . 710 - 0653 Hex Screw 1 / 4 - 20 x . 375 19 . 747 - 1159 Idler Pulley Rod 40 . 710 - 1017 Screw 1 / 4 - 14 x . 625 20 . 754 - 0434 V - Belt 41 . 712 - 0392 Lock Nut 21 . 756 - 0405 Flat Idler w / Flange 3.75 OD 42 . 736 - 3020 Flat Washer . 271 ID x . 630 OD 22 . 756 - 0971 Outer Engine Pulley Half 43 . 784 - 0158A Belt Cover NOTE : For painted parts , please refer to the list of color codes below . Please add the applicable color code , wherever needed , to the part number to order a replacement part . For instance , if a part numbered 700 - xxxx is painted Red , the part number to order would be 700 - xxxx - 0638 . Red : 0638 Powder Black : 0637 Oyster Gray : 0662 NOTE : Specifications are subject to change without notification or obligation . Images my not reflect your exact model and are for reference purposes only . 19
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Problem Cause Remedy 1 . Spark plug wire disconnected . 1 . Connect wire to spark plug . Engine fails to start 10 2 . Fuel tank empty or stale fuel . 2 . Fill tank with clean , fresh gasoline . 3 . Throttle control lever not in correct 3 . Move throttle lever to start position . starting position ( if equipped ) 4 . Move lever to ON position . Trouble 4 . Choke not in ON position . 5 . Clean fuel line . Shooting 5 . Blocked fuel line . 6 . Clean , adjust gap , or replace . 6 . Faulty spark plug . 7 . Wait a few minutes to restart , but do not prime ( if equipped ) 7 . Engine flooding . 1 . Spark plug wire loose . 1 . Connect and tighten spark Engine runs erratic plug wire . 2 . Unit running on CHOKE . 2 . Move choke lever to OFF . 3 . Blocked fuel line or stale fuel . 3 . Clean fuel line ; fill tank with clean , 4 . Vent plugged . fresh gasoline . 5 . Water or dirt in fuel system . 4 . Clear vent . 6 . Dirty air cleaner . 5 . Drain fuel tank . Refill with For repairs beyond 7 . Carburetor out of adjustment . fresh fuel . the minor adjust - ments listed here , 6 . Clean following engine manual . contact an authorized 7 . Refer to engine manual . service dealer . 1 . Fill crankcase with proper oil . 1 . Engine oil level low . Engine overheats 2 . Clean air cleaner . 2 . Dirty air filter . 3 . Remove blower housing and clean . 3 . Air flow restricted . 4 . Refer to engine manual . 4 . Carburetor not adjusted properly . 1 . Stop tiller completely , check and 1 . Foreign object lodged in tines . Tines do no engage discard foreign object . 2 . Tine clevis pin ( s ) missing . 2 . Replace tine clevis pin ( s ) . 3 . Belt worn and / or stretched . 3 . Replace belt . t - 4 . Pulley and idler not in correct adjus ment . 4 . Take unit to authorized service NOTE : Specifications are subject to change without notification or obligation . Images my not reflect your exact model and are for reference purposes only . 0
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NOTES : Use this page to make notes and write down important information . For parts and / or accessories please call 1 - 800 - 800 - 7310 , or 1 - 330 - 220 - 4683 . www.mtdproducts.com NOTE : Specifications are subject to change without notification or obligation . Images my not reflect your exact model and are for reference purposes only . 1
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NOTES : Use this page to make notes and write down important information . For parts and / or accessories please call 1 - 800 - 800 - 7310 , or 1 - 330 - 220 - 4683 . www.mtdproducts.com NOTE : Specifications are subject to change without notification or obligation . Images my not reflect your exact model and are for reference purposes only .
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NOTES : Use this page to make notes and write down important information . For parts and / or accessories please call 1 - 800 - 800 - 7310 , or 1 - 330 - 220 - 4683 . www.mtdproducts.com NOTE : Specifications are subject to change without notification or obligation . Images my not reflect your exact model and are for reference purposes only . 3
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MANUFACTURER’S LIMITED WARRANTY FOR The limited warranty set forth below is given by MTD LLC with respect e . MTD does not extend any warranty for products sold or exported to new merchandise purchased and used in the United States , its outside of the United States , its possessions and territories , except possessions and territories . those sold through MTD’s authorized channels of export distribution . “ MTD � warrants this product against defects in material and workman - f . Replacement parts that are not genuine MTD parts . ship for a period of two ( 2 ) years commencing on the date of original g . Transportation charges and service calls . purchase and will , at its option , repair or replace , free of charge , any part found to be defective in materials or workmanship . This limited war - No implied warranty , including any implied warranty of mer - ranty shall only apply if this product has been operated and maintained chantability of fitness for a particular purpose , applies after the in accordance with the Operator’s Manual furnished with the product , applicable period of express written warranty above as to the and has not been subject to misuse , abuse , commercial use , neglect , parts as identified . No other express warranty , whether written or accident , improper maintenance , alteration , vandalism , theft , fire , water , oral , except as mentioned above , given by any person or entity , or damage because of other peril or natural disaster . Damage resulting including a dealer or retailer , with respect to any product , shall from the installation or use of any part , accessory or attachment not bind MTD . During the period of the warranty , the exclusive remedy approved by MTD for use with the product ( s ) covered by this manual is repair or replacement of the product as set forth above . will void your warranty as to any resulting damage . The provisions as set forth in this warranty provide the sole and Normal wear parts are warranted to be free from defects in material and exclusive remedy arising from the sale . MTD shall not be liable workmanship for a period of thirty ( 30 ) days from the date of purchase . for incidental or consequential loss or damage including , without Normal wear parts include , but are not limited to items such as : batter - limitation , expenses incurred for substitute or replacement lawn ies , belts , blades , blade adapters , grass bags , rider deck wheels , seats , care services or for rental expenses to temporarily replace a snow thrower skid shoes , shave plates , auger spiral rubber and tires . warranted product . HOW TO OBTAIN SERVICE : Warranty service is available , WITH Some states do not allow the exclusion or limitation of incidental or PROOF OF PURCHASE , through your local authorized service consequential damages , or limitations on how long an implied warranty dealer . To locate the dealer in your area , check your Yellow Pages , lasts , so the above exclusions or limitations may not apply to you . or contact MTD LLC at P.O . Box 361131 , Cleveland , Ohio 44136 - In no event shall recovery of any kind be greater than the amount of the 0019 , or call 1 - 800 - 800 - 7310 or 1 - 330 - 220 - 4683 or log on to our purchase price of the product sold . Alteration of safety features of Web site at www.mtdproducts.com . the product shall void this warranty . You assume the risk and liability This limited warranty does not provide coverage in the following cases : for loss , damage , or injury to you and your property and / or to others and a . The engine or component parts thereof . These items may carry a their property arising out of the misuse or inability to use the product . separate manufacturer’s warranty . Refer to applicable manufacturer’s This limited warranty shall not extend to anyone other than the original warranty for terms and conditions . purchaser or to the person for whom it was purchased as a gift . HOW STATE LAW RELATES TO THIS WARRANTY : This limited b . Log splitter pumps , valves , and cylinders have a separate one year warranty gives you specific legal rights , and you may also have other warranty . rights which vary from state to state . c . Routine maintenance items such as lubricants , filters , blade IMPORTANT : Owner must present Original Proof of Purchase to obtain sharpening , tune - ups , brake adjustments , clutch adjustments , deck warranty coverage . adjustments , and normal deterioration of the exterior finish due to use or exposure . d . Service completed by someone other than an authorized service dealer . MTD LLC , P.O . BOX 361131 CLEVELAND , OHIO 44136 - 0019 ; Phone : 1 - 800 - 800 - 310 , 1 - 330 - 0 - 4683