Yard-Man 21A-392B401 User Manual

Front Tine Tiller
Model Number
Warning: This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-
covered, brush-covered or grass-covered land unless the engine’s exhaust system is equipped with a spark arrester meeting applicable local or state laws (if any). If a spark arrester is used, it should be maintained in effective working order by the operator. In the State of California the above is required by law (Section 4442 of the California Public Resources Code). Other states may have similar laws. Federal laws apply on federal lands. A spark arrester for the muffler is available through your nearest engine authorized service dealer or contact the service department, P.O. Box 361131 Cleveland, Ohio 44136-0019.
MTD LLC P.O. BOX 361131 CLEVELAND, OHIO 44136-0019
770-10461A.fm (11/01)
Content Page
Important Safe Operation Practices...................................................................3
Assembling Your Tiller.......................................................................................5
Know Your Tiller.................................................................................................6
Operating Your Tiller..........................................................................................7
Making Adjustments ..........................................................................................10
Maintaining Your Tiller .......................................................................................10
Parts List............................................................................................................14
This Operator’s Manual is an important part of your new tiller. It will help you assemble, prepare and maintain the unit for best performance. Please read and understand what it says.
Before you start assembling your new equipment, please locate the model plate on the equipment and copy the information from it in the space provided below. The information on the model plate is very important if you need help from our Customer Support Department or an authorized dealer.
You can locate the model number by looking down at the rear of the tiller. A sample model plate is explained below. For future reference, please copy the model number and the serial number of the equipment in the space below.
Copy the model number here:
Copy the serial number here:
The engine manufacturer is responsible for all engine-related issues with regards to performance, power­rating, specifications, warranty and service. Please refer to the engine manufacturer’s Owner’s/Operator’s Manual packed separately with your unit for more information.
If you have difficulty assembling this product or have any questions regarding the controls, operation or maintenance of this unit, please call the Customer Support Department.
Call 1- (330) 220-4MTD (4683) or 1- (800)-800-7310 to reach a Customer Support representative. Please have your unit’s model number and serial number ready when you call. See previous section to locate this information. You will be asked to enter the serial number in order to process your call.
For more details about your unit, visit our website at www.yardman.com
WARNING: This symbol points out important safety instructions which, if not followed, could endanger the personal safety and/or property of yourself and others. Read and follow all instructions in this manual before attempting to operate this machine. Failure to comply with these instructions may result in personal injury. When you see this symbol— heed its warning.
WARNING: Engine exhaus t, s om e o f it s con st itu ents , a nd certain vehicle c om ponents contain or e m it chemicals known to State of California to cause cancer and birth defects or other reproductive harm.
DANGER: This machine was built to be operated according to the rules for safe operation in this
manual. As with any type of power equipment, carelessness or error on the part of the operator can result in serious injury. This machine is capable of amputating hands and feet. Failure to observe the following safety instructions could result in serious injury or death.
1. Read, understand, and follow all instructions on the machine and in the manual(s) before attempting to assemble and operate. Keep this manual in a safe place for future and regular reference and for ordering replacement parts.
2. Be familiar with all controls and their proper operation. Know how to stop the machine and disengage them quickly.
3. Never allow children under 14 years old to operate this machine. Children 14 years old and ov er should read and understand the operation instructions and safety rules in this manual and should be trained and supervised by a parent.
4. Never allow adults to operate this machine without proper instruction.
5. Keep bystanders, helpers, pets and children at least 75 feet from the machine while it is in operation. Stop machine if anyone enters the area.
1. Thoroughly inspect the area where the equipment is to be used. Remove all stones, sticks, wire, and other foreign objects which could be tripped over and cause personal injury.
2. Wear sturdy, rough-soled work shoes and close fitting slacks and shirt. Loose fitting clothes or jewelry can be caught in movable parts. Never operate this machine in bare feet or sandals.
3. Disengage clutch levers and shift (if provided) into neutral (“N”) before starting the engine.
4. Never leave this machine unattended with the engine running.
5. Never attempt to make any adjustments while engine is running, except where specifically recommended in the operator’s manual.
6. To avoid personal injury or property damage use extreme care in handling gasoline. Gasoline is extremely flammable and the vapors are explosive. Serious personal injury can occur when gasoline is spilled on yourself or your clothes which can ignite. Wash your skin and change clothes immediately.
7. Use only an approved gasoline container.
8. Extinguish all cigarettes, cigars, pipes and other sources of ignition.
9. Never fuel machine indoors.
10. Never remove gas cap or add fuel while the engine is hot or running.
11. Allow engine to cool at least two minutes before refueling.
12. Never over fill fuel tank. Fill tank to no more than ½ inch below bottom of filler neck to provide space for fuel expansion.
13. Replace gasoline cap and tighten securely.
14. If gasoline is spilled, wipe it off the engine and equipment. Move machine to another area. Wait 5 minutes before starting the engine.
15. Never store the machine or fuel container inside near an open flame, spark or pilot light (e.g. furnace, water or space heater, clothes dryer etc.).
16. Allow machine to cool 5 minutes before storing.
1. Do not put hands or feet near rotating parts. Contact with the rotating parts can amputate hands and feet.
2. Do not operate machine while under the influence of alcohol or drugs.
3. Never operate this machine without good visibility or light. Always be sure of your footing and keep a firm hold on the handles.
4. Keep bystanders, helpers, pets, and children at least 75 feet from the machine while it is in operation. Stop the machine if anyone enters the area.
5. Be careful when tilling in hard ground. The tines may catch in the ground and propel the tiller forward. If this occurs, let go of the handle bars and do not restrain the machine.
6. Exercise extreme caution when operating on or crossing gravel surfaces. Stay alert for hidden hazards or traffic. Do not carry passengers.
7. Never operate the machine at high transport speeds on hard or slippery surfaces.
8. Exercise caution to avoid slipping or falling.
9. Look down and behind and use care when in reverse or pulling machine towards you.
10. Start the engine according to the instructions found in this manual and keep feet well away from the tines at all times.
11. After striking a foreign object, stop the engine, disconnect the spark plug wire and ground against the engine. Thoroughly inspect the machine for any damage. Repair the damage before starting and operating.
12. Disengage all clutch levers and stop engine before you leave the operating position (behind the handles). Wait until the tines come to a comple te stop before unclogging the tines, making any adjustments, or inspections.
13. Never run an engine indoors or in a poorly ventilated area. Engine exhaust contains carbon monoxide, an odorless and deadly gas.
14. Muffler and engine become hot and can cause a burn. Do not touch.
15. Use caution when tilling near fences, buildings and underground utilities. Rotating tines can cause property damage or personal injury.
16. Do not overload machine capacity by attempting to till soil to deep at to fast of a rate.
17. If the machine should start making an unusual noise or vibration, stop the engine, disconnect the spark plug wire and ground it against the engine. Inspect thoroughly for damage. Repair any damage before starting and operating.
18. Keep all shields, guards and safety devices in place and operating properly.
19. Never pick up or carry machine while the engine is running.
20. Use only attachments and accessories approved by the manufacturer. Failure to do so, can result in personal injury.
21. If situations occur which are not covered in this manual, use care and good judgment. Contact your dealer or telephone 1-800-800-7310 for assistance and the name of your nearest servicing dealer.
7. Never store the machine or fuel container inside where there is an open flame, spark or pilot light such as a water heater, furnace, clothes dryer etc.
8. Always refer to the operators manual for proper instructions on off-season storage.
9. If the fuel tank has to be drained, do this outdoors.
10. Observe proper disposal laws and regulations for gas, oil, etc. to protect the environment.
Y our Responsibility
1. 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.
2. The safety label on the tiller is reproduced below for your review. To ensure safe operation of the tiller, follow the instructions on all labels closely.
Maintenance & Storage
1. Never tamper with safety devices. Check their proper operation regularly.
2. Check bolts and screws for proper tightness at frequent intervals to keep the machine in safe working condition. Also, visually inspect machine for any damage.
3. Before cleaning, repairing, or inspecting, stop the engine and make certain the tines and all moving parts have stopped. Disconnect the spark plug wire and ground it against the engine to prevent unintended starting.
4. Do not change the engine governor settings or over­speed the engine. The governor controls the maximum safe operating speed of the engine.
5. Maintain or replace safety and instruction labels, as necessary.
6. Follow this manual for safe loading, unloading, transporting, and storage of this machine.
in the engine. Be certain to service engine with gasoline and oil as instructed in the separate engine manual before operating your mower.
NOTE: Reference to right or left hand side of the tiller is observed from the operating position.
This unit is shipped without gasoline or oil
Removing Unit From Carton
Remove staples, break glue on top flaps, or cut
tape at carton end and peel along top flap to open carton.
Remove loose parts if included with unit (i.e.,
operators manual, etc.)
Cut along corners, lay carton down flat, and remove
packing material.
Roll or slide unit out of carton and check carton
thoroughly for loose parts.
Extend control cables to the rear of the tiller and lay
them on the floor. Be careful not to bend or kink control cables.
Loose Parts In Carton
Tailpiece and Depth Stake
NOTE: All hardware need ed for assembly is attached to the loose parts or the tiller.
Remove the two self-tapping screws on the frame and slide the tailpiece into the frame, with the lower hole in the tailpiece toward the front. See Figure 1.
Secure tailpiece with screws just removed.
Attaching The Handle Assembly
Remove the hex bolt and cupped washer from the top right sid e of the fra me halves . Hold the ca ble guide bracket on the left side of the frame as it will fall when the bolt is removed. See Figure 1.
Insert the handle assembly between the two frame halves and insert the hex bolt just removed through the frame halves, handle assembly, and into the cable guide bracket (notch in cable bracket goes over the flange on the frame).Tighten securely.
Remove the handle knob and hardware from the handle brace. Insert the carriage screw through the welded bracket on the handle and into the end of the handle brace. See Figure 2.
Secure with bell washer and handle knob.
Select one of the three handle height positions
(three notches in welded bracket), and tighten the handle knob to secure the handle in desired position. Make certain the carriage screw is seated securely into one of the three positions provided.
Handle Brace
Handle Knob
Before Assembly
WARNING: Disconnect the spark plug wire and ground it against the engine to prevent unintended starting.
Setting Up Y our Tiller
Attaching The Tailpiece And Depth Stake
Hex Nut and Cupped Washer
Depth Stake
Self-Tapping Screws
Figure 1
Handle Assembly
Figure 2
Attaching Clutch Control Cables
Attach the end of the forward clutch cable, which is located in the rear of the tiller, to the bracket underneath the handle assembly as follows:
Loosen the hex nut on the threaded rod near the end of the cable and move it up the rod as far as it will go. See Figure 3.
Unthread the rod from the rest of the cable and hook the “Z” end of the rod into the bracket underneath the handle assembly from the right hand side.
Z End Hooked in Bracket
Threaded Rod
Hex Nut
Reverse Tine Engagement Lever
Hex Nut
Forward Tine Engagement Handle
Z End Hooked in Bracket
Threaded Rod
Figure 3
Thread th e rod back i nto t he ca ble unt il th e cab le is straight. Do not tighten it enough to put any tension on the spring. See Figure 3.
Thread the hex nut down against the end of cable. Use a pair of pliers and a wrench to lock the nut against the r od.
The reverse clutch cable is attached to the front of the tiller. Attach the end of the reverse cable to the reverse tine engagement handle above the handle assembly in the same manner as the forward cable. See Figure 3.
NOTE: Do not overtighten control cables. Too much tension may cause it to break when engaged.
Final Clutch Adjustment
To check the clutch cables, proceed as follows:
Disconnect the spark plug wire and move it away from the spark plug to prevent accidental starting.
Engage and release the forward tine engagement handle, then the reverse tine engagement lever. If an excessive noise is heard when releasing either the tine drive clutch handle or lever, the cable may be too loose. Adjust either the forward or reverse clutch cable by loosening the hex nut, threading the rod into the cable one or two turns, then retightening the nut. See Figure 4.
With tine engagement handles in neutral, pull the starter rope several times. The tines should not turn. If they turn forward, loosen the hex nut on the forward cable. If they turn toward the rear, loosen the hex nut on the reverse cable and unthread the rod from the cable two or three turns. Retighten the hex nut and check again for correct adjustment.
Reverse Tine Engagement Lever
Forward Tine Engagement Handle
Figure 4
Reverse Tine Engagement Lever
Forward Tine Engagement Handle
Handle Knob
Depth Stake
End Cap
Figure 5
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