Yard-Man 21A-458B401 User's Manual
Contents
1. TO OPERATE THE TILLER 1 Select the depth stake setting 2 Start engine as instructed on page 9 3 Move gear selection handle to one of the forward modes or reverse Use the reverse tine drive when tilling virgin ground sod or hard soil Use the forward tine drive when cultivating or tilling soft ground IMPORTANT When using the forward tine drive lower the depth stake use a shallower tilling depth to make certain the tines do not run across the ground WARNING Do not move the gear A selection handle with the wheels or tines engaged Make certain the unit is stopped completely before changing the gear selection 4 Squeeze the clutch control bail against the handle to engage the wheels and tines NOTE Make certain the gear selection indicator is correctly positioned before engaging the clutch handle If it is between gears the engine will stall To transport tiller do not engage the tines Select the wheel drive only handles so that the wheels are lifted off the ground while using the reverse tine drive or the tiller could move backward and cause personal injury WARNING Do not push down on the For best results it is recommended the garden be tilled twice lengthwise then widthwise to pulverize the soil BELT TENSION ADJUSTMENT Periodic adjustment of the belt tension may be required due to normal stretch and wear on the belt Adjustment is needed if the tines or wheels seem to hesitate wh2. SECTION 5 ASSEMBLY INSTRUCTIONS IMPORTANT This unit is shipped WITHOUT GASOLINE or OIL After assembly see separate engine manual for proper fuel and engine oil recommendations NOTE Left and right is determined from the operator s position standing behind the tiller TOOLS REQUIRED FOR ASSEMBLY Adjustable Wrenches Pair of Pliers TO REMOVE UNIT FROM CARTON 1 Remove staples break glue on top flaps or cut tape at carton end and peel along top flap to open carton 2 Remove loose parts included with unit i e operator s manual etc 3 Cut along dotted lines and lay carton down flat Remove packing material 5 Roll or slide unit out of carton Check carton thoroughly for loose parts 6 Extend control cable and lay on the floor Be careful not to bend or kink control cable li T Handle Hex Bolt y T Knob ls Hex Bolt Ee Depth Washer Washer Stake Clevis Pin SERA E nn HA Hairpin Clip Depth Stake Figure 3 ATTACHING DEPTH STAKE ASSEMBLY 1 Tip the tiller forward so it counterweight rests on front 2 Raise the tine shield hinge flap assembly Remove T knob flat washer and hex bolt from depth stake Insert the depth stake assembly in front of spacer under the tine shield and up through the tine shield assembly as shown in Figure 3 3 Insert clevis pin through the tine shield and the second hole from top of the depth stake Secure with hairpin clip 4 Insert h
3. fF I YaRD MaN REAR TINE TILLER MODEL 21A 458B401 MTD For A Growing World IMPORTANT READ SAFETY RULES AND INSTRUCTIONS CAREFULLY Warning This unit is eguipped 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 368022 Cleveland Ohio 44136 9722 MTD PRODUCTS INC P O BOX 368022 CLEVELAND OHIO 44136 9722 PRINTED IN U S A FORM NO 770 10085A 01 99 SECTION 1 FINDING YOUR MODEL NUMBER This Operators Manual is an important part of your new tiller It will help you assemble prepare and maintain your tiller Please read and understand what it says Before you start to prepare your tiller for its first use please locate the model plate and copy the information from it in this Operators Manual The information on the model plate is very important if you need help from your dealer or the MTD customer
4. 741 0420 741 0421 741 0563 741 0862 750 0258 750 0570 750 0664 750 0671 786 0171 786 0238 737 0300 737 0288 686 0107 Seal 1 0 Shaft DESCRIPTION Seal 75 Shaft Taper Cap Ring Compression Spring 50 Lg Thrust Wash 1 03 I D x 1 62 O D Fl Wash 76 I D x 1 5 O D Bell Wash 45 I D x 1 0 Thrust Wash 445 x 1 92 x 060 Fl Wash 635 I D x 1 59 O D Detent Shaft 1 2 Dia Jack Shaft 625 x 2 385 Jack Shaft 625 x 5 0 Ball Bearing Flange Bearing 1 0 x 2 5 x 1 38 Flange Bearing 75 x 2 5 x 1 38 Ball Bearing 6692 x 5745 x 466 Detent Ball 250 Spacer 315 Spacer 1 0 I D x 2 0 O D x 440 Spacer 505 D x 88 O D x 440 Spacer 75 x 2 0 x 50 L H Chain Case Ass y Gear Positioner Bracket Benelene 920 Grease Never Seez Grease Gear Case Assembly Complete 15 Model 458 16 iodel 458 PART NO DESCRIPTION PART NO DESCRIPTION 747 1152 Shift Rod 32 738 0849 Hex Screw 5 16 18 x 75 Lg 649 0033 Upper Handle Ass y 33 747 0432 Rod 649 0034 Lower Handle Ass y 34 750 0885 Spacer 435 O D x 322 1 D 710 3005 Hex Screw 3 8 16 x 1 25 35 786 0090 Shoulder 710 3056 Hex Screw 5 16 18 x 3 25 36 786 0113 Tine Shield Hinge Flap 711 0415 Clevis Pin 3 8 1 62 37 786 0176 R H Handle Brkt 712 0379 Flange Lock Nut 3 8 24 38 786 0177 L H Handle Brkt 712 0429 Hex Lock Nut 5 16 18 39 786 0178 Tine Shield 714 0147 Cotter P
5. ff Bail Th es Figure 6 3 Pull the cable upwards to obtain slack push the Z end into the bail You will need to attach Z fitting from the inside to the outside See Figure 6 4 With the clutch control bail released adjust the bottom nut at the cable bracket three turns up from end of threads Tighten the upper nut against the bracket Carefully squeeze the clutch control bail against the handle The control wire should now be straight NOTE Do not overtighten control wire Too much tension may cause it to break WARNING Be certain to check the A clutch cable adjustment as instructed on page 7 of your owner s guide before operating the tiller Secure drive cable to handle using cable tie Refer to Figure 8 Cut off excess end of cable tie ATTACHING THE CONTROL ROD 1 Remove hairpin clips from control rod rubber washers to remain on control rod 2 Insert one end of the control rod through the indicator bracket on the shift cover and secure with hairpin clip that was removed in step 1 See Figure 7 3 Insert the remaining end of the control rod through the hole in the gear selector handle and secure with hairpin clip See Figure 8 Control Rod Washer Idler S Pulley Rod Figure 7 CHECKING THE CLUTCH ADJUSTMENT IMPORTANT Service the engine with oil and gasoline before checking this adjustment Refer to the separate engine manual packed with your tille
6. idler Bracket 710 0237 Hex Bolt 5 16 24 x 62 Lg 26 1786 0186 Belt Keeper Brkt 710 0412 Hex Bolt 1 4 28 x 75 Lg 27 786 0123A Shift Cover Brkt 710 0502A Hex Wash TT Sems Screw 3 8 16 x 28 786 0193 Idier Belt Keeper 1 250 Lg 29 634 0106 RH Wheel Ass y Comp 16 0 x 4 0 710 0591 Hex Bolt 3 8 24 x 1 00 634 0107 LH Wheel Ass y Comp 16 0 x 4 0 710 0599 Hex Wash Hd S Tap Scr 734 0808 Tire Only 16 0 x 4 0 710 0723 Hex Cap Screw 3 8 16 x 1 25 30 1634 0108 Wheel Rim Ass y Comp 712 0266 Ctr Lock Jam Nut 3 8 16 31 734 0255 Air Valve 712 0267 Hex Nut 5 16 18 32 1711 1017 Clevis Pin 1714 0104 Internal Cotter Pin 33 714 0104 Internal Cotter Pin 736 0104 Hairpin Clip 34 710 0506 Hex Bolt 1 2 13 x 5 00 Lg 1736 0119 L Wash 5 16 I D 35 712 3066 Hex Nut 1 2 13 Thd 1736 0176 Fl Wash 1 4 I D x 93 O D 36 731 1595 Counterweight 1736 0271 Spring Wash 317 x 625 O D x 099 37 736 0179 Fl Wash 510 I D x 1 0 O D 1736 0329 L Wash 1 4 LD 38 736 0921 L Wash 1 2 Lg i 736 0452 Bell Wash 396 x 1 140 x 095 39 710 0653 Hex Screw 1 4 20 x 375 Lg 738 0876 Shld Nut 7 16 20 40 710 1017 Screw 1 4 14 x 625 Lg 746 1083 Clutch Cable 41 712 0392 Acorn Lock Nut 747 1159 Idler Pulley Rod 42 736 0463 Fl Washer 1 4 x 620 Lg 1 1754 0434 Belt 4L x 58 16 Lg 43 784 0158A Belt Cover 756 0405 Fl Idler w Flange 3 75 O D 44 710 0805 Hex Bolt 5 16 18 x 1 50 Lg 1756 0971 Outer Engine Pulley Half 45 736 0242 Be
7. support department Every tiller has a model plate You can locate it by standing in the operating position behind the unit and looking down at the center of the rear tine cover e The model plate will look like Figure 1 This is where your model number will be XXX X XXX X XXX XXXXXXXXXXX This is where your serial number will be Copy the model number here MTD PRODUCTS INC P O BOX 368022 j GREAT AND Om aioe Copy the serial number here Figure 1 SECTION 2 CALLING CUSTOMER SUPPORT LOCATE YOUR MODEL NUMBER AND SERIAL NUMBER Record this information in the space provided To find your units specific model number and serial number see SECTION 1 FINDING YOUR MODEL NUMBER If you are having difficulty assembling this product or if you have any guestions regarding the controls operation or maintenance of this unit please call the Customer Support Department Customer Support can be reached by dialing 1 330 220 4MTD 4683 or 1 800 800 7310 Please have your model number and serial number ready when you call Although both numbers are important you will be asked to enter only your serial number before your call can be processed SECTION 3 IMPORTANT SAFE OPERATION PRACTICES WARNING THIS SYMBOL POINTS OUT IMPORTANT SAFETY INSTRUCTIONS WHICH IF A 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
8. the engine and allow the machine to come to a complete stop Disconnect the spark plug wire and move it away from the spark plug Take the following steps Inspect for damage e Repair or replace any damaged parts e Check for any loose parts and tighten to assure continued safe operation Muffler and engine become hot and can cause a burn Do not touch Keep all shields guards and safety devices in place and operating properly Use caution when tilling near fences buildings and underground utilities Rotating tines can cause damage or injury Do not operate engine if air cleaner or cover over carburetor air intake is removed except for adjustment Removal of such parts could create a fire hazard Only use accessories approved for this machine by the manufacturer Read understand and follow all instructions provided with the approved accessory If situations occur which are not covered by this manual use care and good judgment Contact your dealer for assistance 2 CHILDREN Tragic accidents can occur if the operator is not alert to the presence of small children Children are often attracted to the tilling activity Never assume that children will remain where you last saw them Keep children out of the work area and under the watchful eye of a responsible adult other than the operator Be alert and turn the unit off if a child enters the area Never allow children under the age of 14 to operate the till
9. to allow the gears to synchronize CLUTCH CONTROL BAIL The clutch control bail is located below the handle See Figure 8 Lifting the clutch control bail against the handle engages the wheel and tine drive mechanisms NOTE Never engage clutch lever while shifting DEPTH STAKE The depth bar controls the tilling depth Refer to SECTION 8 HOW TO USE YOUR TILLER on page 9 SECTION 7 OPERATION NOTE Engine is shipped without oil be certain to read SECTION 8 HOW TO USE YOUR TILLER on page 9 Use the reverse tine drive when tilling virgin ground sod or hard soil Use the forward tine drive when cultivating or tilling soft ground 1 WARNING Before operating the tiller BEFORE STARTING 1 Service engine with oil as instructed in the separate engine manual packed with your unit 2 Fill fuel tank with clean fresh lead free low lead or regular grade leaded gasoline TO START ENGINE WARNING Be Sure No One ls A Standing In Front Of The Tiller While The Engine Is Running Or Being Started 1 Place the throttle control lever in the FAST rabbit position 2 Move choke lever to CHOKE position NOTE A warm engine may not require choking HANDLE ADJUSTMENT See Figure 8 The handle may be adjusted to be raised or lowered in line with the tiller To adjust the handle position loosen the handle height adjustment crank a few turns Pivot handle up or down to desired position Tighten crank 3 Stand at si
10. NCE WARNING Disconnect the spark plug A wire and ground it against the engine before performing any repairs or maintenance ENGINE Refer to the separate engine manual for engine maintenance instructions Maintain engine oil as instructed in the separate engine manual packed with your unit Read and follow instructions carefully Service air cleaner every ten hours under normal conditions Clean every hour under extremely dusty conditions Poor engine performance and flooding usually indicates that the air cleaner should be serviced To service the air cleaner refer to the separate engine manual packed with your unit IMPORTANT Never run your engine without air cleaner completely assembled The spark plug should be cleaned and the gap reset every 25 hours of engine operation Spark plug 5 Replace the wave washer and hairpin clip 6 Check clearance of the idler pulley rod to the indicator bracket by shifting to each forward mode as before CARBURETOR ADJUSTMENT WARNING If any adjustments are made to the engine while the engine is running e g carburetor disengage all clutches and tines Keep clear of all moving parts Be careful of heated surfaces and muffler A Never make unnecessary adjustments The factory settings are correct for most applications If adjustments are needed refer to the separate engine manual packed with your tiller Clutch Bail Lubricate the pivot point on the clutch bail and the cable
11. OPERATE YOUR TILLER FAILURE TO COMPLY WITH THESE INSTRUCTIONS MAY RESULT IN PERSONAL INJURY WHEN YOU SEE THIS SYMBOL HEED ITS WARNING WARNING The Engine Exhaust from this product contains chemicals known to the State of California to cause cancer birth defects or other reproductive harm manual As with any type of power equipment carelessness or error on the part of the operator can 1 DANGER Your tiller was built to be operated according to the rules for safe operation in this result in serious injury This tiller is capable of amputating hands and feet Failure to observe the following safety instructions could result in serious injury or death 1 GENERAL OPERATION Read this operators manual carefully in its entirety before attempting to assemble this machine Read understand and follow all instructions on the machine and in the manual s before operation Be completely familiar with the controls and the proper use of the machine before operating it Keep this manual in a safe place for future and regular reference and for ordering replacement parts Your tiller is a powerful tool not a plaything Therefore exercise extreme caution at all times Your unit has been designed to perform one job to till soil Do not use it for any other purpose Never allow children under age 14 to operate the unit Children 14 years and older should only operate the unit under close parental supervision Only responsible individuals w
12. as To reduce fire hazard keep engine and muffler free of leaves grass and other debris build up Clean up fuel and oil spillage Allow unit to cool at least 5 minutes before storing Before cleaning repairing or inspecting make certain the tines and all moving parts have stopped Disconnect the spark plug wire and keep wire away from spark plug to prevent accidental starting Do not use flammable solutions to clean air filter Keep all nuts bolts and screws tight to be sure the equipment is in safe working condition Never tamper with safety devices Check their proper operation regularly Do not alter or tamper with the engine s governor setting The governor controls the maximum safe operating speed of the engine Overspeeding the engine is dangerous and will cause damage to the engine and to other moving parts of the machine WARNING YOUR RESPONSIBILITY Restrict the use of this power machine to persons who read understand and follow the warnings and instructions in this manual and on the machine NWARNING AVOID INJURY FROM ROTATING TINES KEEP HANDS FEET AND CLOTHING AWAY Figure 2 Safety labels found on your unit SECTION 4 LOOSE PARTS Handle Assembly Depth Control Stake Rod Assembly n Ss O v f o FF ff 9 i O jy I LA N O Sn en I ALT lt A i A NOTE Cable tie not shown
13. 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 Shaft Remove tines at least once a season and lubricate with oil Wheel Axle Remove the wheel assemblies at least once a season and lubricate with oil replacement is recommended at the start of each tiller season check engine manual for correct plug type and gap specification Clean the engine regularly with a cloth or brush Keep the cooling system blower housing area clean to permit proper air circulation which is essential to engine performance and life Be certain to remove all dirt and combustible debris from muffler area CLEANING THE TINE AREA Clean the underside of the tine shield after each use The dirt washes off the tines easier if washed off immediately instead of after it dries BELT REPLACEMENT A CAUTION Do not use an off the shelf belt Your tiller has been engineered with a belt made of special material Kevlar Tensile for longer life and better performance It should not be replaced with an off the shelf belt If belt replacement is required order belt or belts by part number from your nearest authorized dealer Part No 754 0434 V Belt 1 Disconnect and ground the spark plug wire against the engine Remove the belt cover from the left side of the tiller as follows See Figure 11 Remove two t
14. bags rider deck wheels seats snow thrower skid shoes shave plates 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 please check the yellow pages or contact the Customer Service Department of MID PRODUCTS INC P O Box 368022 Cleveland Ohio 44136 9722 Phone 1 330 220 4683 The return of a complete unit will not be accepted by the factory unless prior written permission has been extended by the Customer Support Department of MTD PRODUCTS INC Transportation charges Transportation charges for the movement of any power equipment unit or attachment are the responsibility of the purchaser Units exported out of the United States MTD PRODUCTS INC does not extend any warranty for YABD MEN products sold or exported outside of the United States of America its possessions and territories except those sold through MTD PRODUCTS INC s authorized channels of export distribution Po MTD Other Warranties 1 The engine or component parts thereof carry separate warranties from their manufacturers Please refer to the applicable manufacturers warranty on these items 2 Batteries are covered by a 90 day replacement warranty 3 Log splitter pumps valves and cylinders or component parts thereof are covered by a one year warranty 4 All other warranties express or implied including any imp
15. de of tiller Grasp the starter handle with your right hand and pull out slowly until it pulls slightly harder Place your left hand on the lower portion of the upper handle 4 Pull starter handle rapidly Do not allow handle to snap back Allow it to rewind slowly while keeping a firm hold on the starter handle 5 Repeat steps 3 and 4 until engine starts 6 As engine warms up and begins to operate evenly move choke lever gradually to RUN position If engine falters return to choke position then slowly move to RUN position 7 Refer to engine manual for additional engine information NOTE After starting engine and prior to using the tiller be certain to check the clutch adjustment as described in Checking the Clutch Adjustment section of Assembly Instructions TO STOP ENGINE 1 Move throttle control to the STOP position 2 Disconnect spark plug wire and ground to pre vent accidentally starting while equipment is unattended NOTE After the first ten hours of operation recheck the clutch adjustment Refer to Checking the Clutch Adjustment section of the Assembly Instructions SECTION 8 HOW TO USE YOUR TILLER for the first time use the depth stake setting that gives 1 inch of tilling depth second hole from the top See Figure 9 1 WARNING When operating the tiller Tilling depth is controlled by the depth stake which can be adjusted to five different settings See Figure 9 Adjust the side s
16. er 3 SERVICE A Use extreme care in handling gasoline and other fuels They are extremely flammable and the vapors are explosive Store fuel and oil in approved containers away from heat and open flame and out of the reach of children Check and add fuel before starting the engine Never remove gas cap or add fuel while the engine is running Allow engine to cool at least two minutes before refueling Replace gasoline cap securely and wipe off any spilled gasoline before starting the engine as it may cause a fire or explosion NWARNING TO AVOID INJURY READ THE OPERATOR S MANUAL KNOW LOCATION AND FUNCTIONS OF ALL CONTROLS KEEP ALL SAFETY DEVICES AND SHIELDS IN PLACE e NEVER ALLOW CHILDREN OR UNINSTRUCTED ADULTS TO OPERATE TILLER e SHUT OFF ENGINE BEFORE UNCLOGGING TINES OR MAKING REPAIRS eKEEP BYSTANDERS AWAY FROM MACHINE e KEEP AWAY FROM ROTATING PARTS USE EXTREME CAUTION WHEN REVERSING OR PULLING THE MACHINE TOWARDS YOU Extinguish all cigarettes cigars pipes and other sources of ignition Never refuel unit indoors because flammable vapors will accumulate in the area Never store the machine or fuel container inside where there is an open flame or spark such as a gas hot water heater space heater clothes dryer Or furnace Never run your machine in an enclosed area as the exhaust from the engine contains carbon monoxide which is a odorless tasteless and deadly poisonous g
17. ex bolt into the top hole of the depth stake assembly Place flat washer on hex bolt and thread T knob onto the hex bolt See Figure 3 Tighten securely 5 Tip the tiller back down so it rests on the depth stake transport position ATTACHING THE HANDLE ASSEMBLY gi Remove e e P i e x Handle S Ass y Handle Bracket Figure 4 1 Remove top two bolts and flange lock nuts from handle mounting brackets as shown in Figure 4 Do not remove the bottom bolt and nut 2 Place handie assembly in position between the handle mounting brackets See Figure 4 3 Line up holes in handle with holes in handle mounting brackets Secure with hardware removed in step 1 Nut Slot in Cable Bracket Hex Washer Nut Figure 5 ATTACHING THE CLUTCH CABLE Attach the clutch cable to the handle as follows be careful not to kink the cable 1 Route the clutch cable to the left side of the tiller and underneath the handle Remove one hex nut and lock washer from the end of the casing on the clutch cable Thread the other nut all the way onto the threaded casing as far as it will go 2 Slip the wire through the slot on the cable bracket on the handle Push the end of the casing up through the cable bracket Slide the lock washer on the casing and rethread the hex nut on the end of the cable casing four turns Do not tighten at this time See Figure 5 z Fitting V S N LE Clutch Control
18. hields as shown in Figure 10 as you adjust the depth stake Be certain spark plug wire is disconnected and grounded against the engine 1 When using the tiller for the first time use the second adjustment hole from the top 1 of tilling depth See Figure 9 2 When breaking up sod and for shallow cultivation use the setting which gives 1 of tilling depth second hole from the top Place the side shields in their lowest position For further depth raise the depth stake and side shields and make one or two more passes over the area 3 When tilling loose soil depth stake may be raised to its highest position use bottom adjustment hole to give the deepest tilling depth Raise the side shields to their highest position Use This Position Figure 9 4 To transport tiller lower the depth stake use top adjustment hole 5 To adjust the depth stake remove the clevis pin and hairpin clip See Figure 9 Move the depth stake to the desired setting 6 To adjust the side shields remove the front wing nut and loosen the rear wing nut See Figure 10 Place side shield in position desired Replace wing nuts and tighten securely Side Shields Use This Hole for Front lt Wing Nut N Wing Nut N Use This Hole for Highest Deepest Position Figure 10 SECTION 9 ADJUSTMENTS HANDLE ADJUSTMENT The handle height may be adjusted Refer to the Control section for details of handle adjustment
19. ho are familiar with these rules of safe operation should be allowed to use your unit Do not operate tiller while under the influence of alcohol or drugs Keep the area of operation clear of all persons particularly small children and pets Stop the engine when they are in the vicinity of your tiller Wear sturdy rough soled work shoes and close fitting slacks and shirt Shirt and slacks that cover the arms and legs and steel toed shoes are recommended Do not wear loose fitting clothes or jewelry and secure hair so it is above shoulder length They can be caught in moving parts Never operate a unit in bare feet sandals or sneakers Operate tiller only in daylight or good artificial light Do not start tiller unless the shift lever if provided is in the neutral N position Do not allow anyone to stand or walk in front of tiller when starting or running engine Do not place feet or hands on or near the tines when starting the engine or while the engine is running Never attempt to make depth bar tine width cable handle or wheel adjustments while the engine is running Do not leave the tiller unattended with the engine running Before attempting to remove rocks bricks and other objects from tines stop the engine and be sure the tines have stopped completely Disconnect the spark plug wire and move it away from the spark plug If your machine should start making an unusual noise or vibration immediately stop
20. ile turning but the engine maintains the same speed To adjust the tension on the belt refer to clutch adjustment information in Checking the Clutch Adjustment section of the Assembly Instructions After belt tension has been adjusted if the belt is excessively stretched you may need to adjust the idler pulley rod This can easily be checked With the engine off and the clutch control bail disengaged shift the gear selection handle to each forward mode If the indicator bracket touches the idler pulley rod with the clutch control bail disengaged then an adjustment is necessary 1 Disconnect and ground out spark plug wire against the engine 2 Remove the belt cover as described in the belt replacement section on page 12 3 Remove the hairpin clip and flat washer from the idler pulley rod See Figure 12 4 Move the idler pulley rod to the lower hole in the idler bracket See Figure 12 SECTION 10 LUBRICATION Transmission The transmission is pre lubricated and sealed at the factory lt requires no checking unless the transmission is disassembled To fill with grease lay the right half of the transmission on its side Add 30 ounces of Benalene 920 grease Apply a bead of RTV or silicone sealant to the right half of the transmission all the way around the gear compartment Assemble the left half to it This grease can be obtained at your nearest authorized dealer Order part number 737 0300 SECTION 11 MAINTENA
21. in 40 786 0179 Tine Shield Brkt 0 720 0313 Grip 41 786 0180 Shoulder Spacer Brkt 1 720 0210A T Knob 42 686 0109 Shift Crank Ass y 2 720 0278 Foam Grip 44 710 1017 Screw 1 4 14 x 625 4 726 0317 Cable Tie 46 715 0120 Spirol Pin 3 16 x 1 00 5 735 0246 Plug 49 784 0208C Shift Cover 6 736 0117 Flat Washer 3 8 x 620 x 033 50 711 0415 Clevis Pin 7 736 0242 Bell Wash 340 I D x 872 O D 51 712 3054 Hex Nut 3 8 24 Thd 8 738 0958 Shoulder Spacer 53 742 0305 13 Dia Articulating Tine 9 784 0190 Handle Adjustment Crank 54 738 0689 Shld Bolt 1 2 Dla x 175 0 784 0191 Hex Nut Ret Bracket 55 736 0208 Fl Wash 51 I D x 1 50 1 786 0120 Depth Stake 56 736 0253 Bell Wash 515 I D x 1 14 2 747 1157 Bail Clutch 57 738 0688 Shld Bolt 1 2 Dia x 320 3 786 0181 Shift Lever Rod 58 784 0160 Tine Adapter Ass y 18 4 686 0044A Tine Shield Cover Ass y 59 714 0149B Internal Cotter Pin 5 710 0176 Hex Cap Screw 5 16 18 x 2 75 60 735 0127 Rubber Washer 6 710 3008 Hex Cap Screw 5 16 18 x 750 61 714 0104 Cotter Pin 7 710 3097 Carriage Bolt 3 8 16 x 1 0 62 710 3022 Hex Screw 3 8 16 x 2 75 Lg 8 712 0421 Wing Nut 63 736 0204 Flat Washer 9 712 0431 Flange Nut 3 8 16 64 712 0431 Flange Nut 344 I D x 62 O D 0 712 3004A Flange Nut 5 16 18 65 736 0169 Lock Washer 1 726 0106 _ Cap Nut _ de de La 17 Model 458 18 lodel 458 EF REF 10 PART NO DESCRIPTION NO PART NO DESCRIPTION 686 0111 Belt Cover Brkt Ass y 25 786 0064A
22. ine or stale fuel Clean fuel line fill tank with clean fresh gasoline Fuel will not last over thirty days unless a fuel stabilizer is used Vent in gas cap plugged Clear vent Water or dirt in fuel system Drain fuel tank Refill with fresh fuel Dirty air cleaner Refer to the engine manual packed with your unit Carburetor out of adjustment Refer to the engine manual packed with your unit Engine over Engine oil level low Fill crankcase with proper oil heats Dirty air cleaner Refer to the engine manual packed with your unit Refer to the engine manual packed with your unit Adjust carburetor as instructed in separate engine manual Dislodge foreign object Replace tine clevis pin s Take unit to authorized service dealer Air flow restricted Carburetor not adjusted properly Foreign object lodged in tines Tine clevis pin s missing Pulley and idler not in correct adjustment Not shifting properly Tines do not engage Refer to Controls section of operators manual for proper shifting procedures Adjust control cable see assembly instructions Replace belt Forward rotation should only be used on soil that has Control cable not adjusted properly Belt worn and or stretched Improper rotation Tines skip over ground already been tilled not on virgin soil Wheels do not Clevis pin missing Replace clevis pin engage Tiller is not being shifted properly Refer to Controls
23. lied warranty of merchantability or fitness for a particular purpose are hereby expressly disclaimed in their entirety 5 The provisions as set forth in this warranty provide the sole and exclusive remedy of MTD PRODUCTS INC s obligations arising from the sales of its products MTD PRODUCTS INC will not be liable for incidental or consequential loss or damage 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 Certain disclaimers are not allowed in some states and therefore they may not apply to you under all circumstances NOTE This warranty does not cover routine maintenance items such as lubricants filters blade sharpening and tune ups or adjustments such as brake adjustments clutch adjustments or deck adjustments Nor does this warranty cover normal deterioration of the exterior finish due to use or exposure
24. ll Wash 340 I D x 872 O D i 1756 0972 Inner Engine Pulley Half 46 712 3010 Nut Hex 5 16 18 756 1162 Input Pulley PORTANT For a proper working machine use Factory proved Parts BELTS are specially designed to engage and disengage fely A substitute non OEM V belt can be dangerous by not engaging completely 19 MANUFACTURER S LIMITED WARRANTY FOR YARD MAN For TWO YEARS from the date of retail purchase within the United States of America its possessions and territories MID PRODUCTS INC will at its option repair or replace for the original purchaser free of charge any part or parts found to be defective in material or workmanship This warranty covers units which have been operated and maintained in accordance with the operating instructions furnished with the unit and which have not been subject to misuse abuse commercial use neglect accident improper maintenance or alteration Normal wear parts or components thereof are subject to separate terms as noted below in the No Fault Ninety Day Consumer Warranty clause All normal wear part failures will be covered on this product for a period of 90 days regardless of cause After 90 days but within the two year period normal wear parts failures will be covered ONLY IF caused by defects in material or workmanship of OTHER component parts Normal wear parts are defined as batteries belts blades blade adapters grass
25. of tire for tire manufacturers recommended pressure WARNING Maximum tire pressure A under any circumstances is 30 p s i Equal tire pressure should be maintained on both tires SECTION 6 CONTROLS Gear A Selectio LX Handle Control vi N Rod 7 Clutch Control Control _ Height gt Adjustment Crank Cable Tie Figure 8 THROTTLE CONTROL The throttle control lever is located on the engine It controls the engine speed and stops the engine See Engine manual for further information CHOKE LEVER The choke lever is located to the left of the throttle lt is used to enrich the fuel mixture in the carburetor when starting a cold engine See Engine manual for further information GEAR SELECTION HANDLE The gear selection handle is located in the center of the handle on the tiller lt is used to select NEUTRAL REVERSE or one of the FORWARD modes see below Pull or push the handle so that the indicator on top of shift cover points to the operating mode desired See Figure 8 NEUTRAL Transmission is in neutral REVERSE Reverse wheel drive FORWARD Modes Wheels Forward Forward wheel drive only Tines Reverse Forward wheel drive and reverse tine drive Tines Forward Forward wheel and tine drive WARNING Make certain unit is in A NEUTRAL when starting the engine NOTE If difficulty is encountered in moving the gear selection handle move the tiller forward or backward slightly
26. orx screws from the top of belt cover Remove the hex cap nut and flat washer from the side of the belt cover Remove the hex screw at the bottom of the front of the cover Remove the belt keeper bracket located behind the engine pulley by removing two hex bolts and lock washers See Figure 12 Remove belt Reassemble new belt following instructions in reverse order Torx Screws Belt Cover _ Hex Cap Nut Figure 11 12 NOTE Upon reassembly make certain the belt is routed over the idler pulley and inside of belt keepers by engine pulley See Figure 12 Idler S a td Belt Keeper ler Brkt Figure 12 TIRES Recommended operating tire pressure is approximately 20 p s i check sidewall of tire for tire manufacturers recommended pressure Maximum tire pressure under any circumstances is 30 p s i Equal tire pressure should be maintained on both tires When installing a tire to the rim be certain rim is clean and free of rust Lubricate both the tire and rim generously Never inflate to over 30 p s i to seat beads A WARNING Excessive pressure over 30 p s i when seating beads may cause tire rim assembly to burst with force sufficient to cause serious injury SECTION 12 OFF SEASON STORAGE If the tiller will not be used for a period longer than 30 days the following steps should be taken to prepare the tiller for storage 1 Clean the exterior of engine and the entire
27. r for proper fuel and engine oil recommendations Position the tiller so the front counterweight is against a solid object such as a wall With the gear selection lever in NEUTRAL start the engine Refer to the separate engine manual Standing on the right side of the tiller examine the belt inside the belt cover lt should not be turning NOTE Do not put fingers under the belt cover If the belt turns with the unit in neutral adjust by moving the hex nut below the cable bracket down two full turns See Figure 5 Tighten the upper hex nut against the bracket Now move the shift lever to FORWARD Wheels Forward position Carefully engage the clutch by lifting the clutch control bail against the handle The wheels should spin If the wheels do not spin with the unit in forward adjust by moving the hex nut which is above the cable bracket up two full turns Tighten the bottom hex nut against the bracket Recheck both adjustments and necessary readjust as NOTE A secondary cable adjustment is available if you reach the point that additional adjustment is needed Remove the belt cover and move the hex nuts at the other end of the cable towards the end of the casing Then readjust the hex nuts at the handle TIRE PRESSURE 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
28. section of operator s manual for proper shifting procedures Adjust control cable see assembly instructions Replace belt Control cable not adjusted properly Belt worn and or stretched Note For repairs beyond the minor adjustments above contact your local authorized service dealer 13 Model 458 14 odel 458 IEF NO PART NO DESCRIPTION 611 0020 Wheel Shaft Ass y 33T 611 0021 Tine Shaft Ass y 18T 611 0128 Jack Shaft Ass y 611 0129 Input Shaft Ass y 617 0058 Rev Idler Gear Ass y 30T 617 0059 Ftine Idler Gear Ass y 30T 617 0060 Tine Input Sprocket Ass y 9T 617 0061 Wheel Input Sprocket Ass y 10T 617 0062 Gear Ass y 11T 2 686 0108 R H Housing Ass y 1 710 0376 Hex Bolt 5 16 18 x 1 Lg 2 710 0599 Hex S Tap Scr 1 4 20 x 5 3 710 0604 Hex S Tap Scr 5 16 18 x 625 4 710 3008 Hex Bolt 5 16 18 x 75 5 711 1349 Input Shaft 5 712 0378 Hex Nut 7 16 20 7 712 3004A Flange Nut 5 16 18 3 713 0367 420 Chain 1 2 Pitch x 50 Links 3 713 0484 450 Chain 5 8 Pitch x 54 Links I 716 0865 Snap Ring 1 717 0853 Shifting Fork 2 717 1582 Spur Gear 44T 3 717 1583 Spur Gear 30T 4 717 1584 Spur Gear 30T 5 717 1585 Spur Gear 44T 5 717 1587 Spur Gear 44T 7 717 1594 R Spur Gear 16T PART NO 721 0878 721 0379 726 0277 732 0496 736 0163 736 0351 736 0407 736 0518 736 3088 738 0645 738 0648 738 1013 741 0124
29. tiller thoroughly Lubricate the tiller as described in the lubrication instructions 2 Refer to the engine manual for correct engine storage instructions 3 Wipe tines with oiled rag to prevent rust 4 Store tiller in a clean dry area Do not store next to corrosive materials such as fertilizer NOTE When storing any type of power equipment in an unventilated or metal storage shed care should be taken to rustproof the equipment Using a light oil or silicone coat the equipment especially any springs bearings and cables SECTION 13 TROUBLE SHOOTING GUIDE Trouble Possible Cause s Corrective Action Engine fails to Fuel tank empty or stale fuel Fill tank with clean fresh gasoline Fuel will not last over thirty days unless a fuel stabilizer is used start Throttle control lever not in correct Move throttle lever to start position starting position if so equipped Blocked fuel line Dirty aircleaner Choke not in ON position Spark plug wire disconnected Faulty spark plug Engine flooded Unit running on CHOKE Clean fuel line Refer to the engine manual packed with your unit Move switch to ON position Connect wire to spark plug Clean adjust gap or replace Refer to the engine manual packed with your unit Move choke lever to OFF position Engine runs erratic Spark plug wire loose Connect and tighten spark plug wire Blocked fuel l
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