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Yard-Man 979 Operator's Manual
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Yard-Man 979 Operator's Manual

Yard-Man 979 Operator's Manual

21" self-propelled
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OPERATOR'S
MANUAL
21" Self-Propelled
Mower
Model Number
979
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IMPORTANT:
READ SAFETY
RULES AND INSTRUCTIONS
CAREFULLY
Warning:
This unit is equipped with an internal combustion
engine and should not be used on or near any unimproved
forest-
covered, brush-covered
or grass-covered
land unless the engine's exhaust system is equipped with a spark arrester meeting
applicable local or state laws (if any). If a spark arrester is used, it should be maintained in effective working order by the operator.
In the State of California the above is required by law (Section 4442 of the California Public Resources Code). Other states may have
similar laws. Federal laws apply on federal lands. A spark arrester for the muffler is available through your nearest engine authorized
service dealer or contact the service department,
P.O. Box 368022 Cleveland, Ohio 44136-9722.
MTD PRODUCTS
INC. P.O. BOX 368022 CLEVELAND,
OHIO 44136-9722
PRINTED IN U.S.A.
FORM
NO. 770-10075B
(lo/oo)

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Summary of Contents for Yard-Man 979

  • Page 1 OPERATOR'S MANUAL 21" Self-Propelled Mower Model Number MTD'"#!!:;( _ii_, i!i!i!i!i _ .._!i!i!i!i!i!i iiii iiiiiiii IMPORTANT: READ SAFETY RULES AND INSTRUCTIONS CAREFULLY Warning: This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest- covered, brush-covered or grass-covered...

  • Page 2: Table Of Contents

    TABLEOFCONTENTS Content Page Important Safe Operation Practices ..............Slope Gauge ...................... Assembling Your Lawn Mower ................Know Your Lawn Mower ..................Operating Your Lawn Mower ................Making Adjustments ..................Maintaining Your Lawn Mower ................Troubleshooting ....................Parts List ......................FINDINGMODEL NUMBER This Operator's Manual is an important part of your new lawn mower.

  • Page 3: Important Safe Operation Practices

    SECTION 1: IMPORTANT SAFEOPERATION P RACTICES 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.

  • Page 4: Slope Gauge

    unclogging thechute. The cutting blade c ontinues to obscure your vision of a child who may run into the rotate f orafew seconds after t he engine i sshut o ff.Never mower. place any part o fthebody intheblade area until youare Keep children away from hot or running engines.
  • Page 5 3. Check t he blade and engine m ounting bolts atfrequent 9. Grass c atcher components, discharge cover, and trail intervals forproper tightness. Also, visually inspect blade shield a resubject towear a nddamage which c ould fordamage (e.g., bent, cracked, worn) R eplace blade expose m oving p arts orallow objects tobethrown.
  • Page 6 SIGHT AND HOLD THIS LEVEL WITH A VERTICAL TREE ' ql A POWER POLE A CORNER OF A BUILDING OR A FENCE POST 15 ° .£ WARNING • ¢0 _ Do not mow on inclines with a slope in excess of 15 degrees (a rise of approximately 2-1/2 feet every 10 feet)_ A riding mower could CO O a.

  • Page 7: Assembling Your Lawn Mower

    SECTION 3: ASSEMBLING Y OUR LAWNMOWER IMPORTANT: This unit is shipped without gasoline or oil Assembly in the engine. Be certain to service engine with gasoline and oil as instructed in the separate engine manual before operating your mower. NOTE: Reference to right or left hand side of the mower is observed from the operating position.

  • Page 8: Know Your Lawn Mower

    NOTE: Make certain the drive cable is routed around the outside and above the lower handle so it does not interfere with attaching the grass bag. Starter The rope guide, which is connected to the support rod, is located on the right side of lower handle. Rope See Figure 5.
  • Page 9 SECTION 5: OPERATING Y OUR LAWNMOWER Towards B etterMowerPerformance Pour fresh, clean gasoline into the mower's gas Hold control handle down and pull rope firmly to tank until the tank is full. Do not use gasoline start the engine. that is more than 30 days old. Set cutting height adjustment lever to middle Make sure to connect the mower's spark plug setting and mow a single pass on your lawn;...
  • Page 10 youtoslipandfall.New grass, t hickgrass, o rwetgrass NOTE: The chute door has been designed to move the mayrequire a narrower cut. starter rope out of the way of the bag when the chute Fora healthier lawn,never c utoffmorethanone-third door is opened. ofthetotallength ofthegrass.

  • Page 11: Making Adjustments

    SECTION 6: MAKING ADJUSTMENTS Place the hairpin clips in the inner holes in the weld adjustments without first stopping engine pins and insert the carriage bolts the upper hole on WARNING: Do not at any time make any and disconnecting spark plug wire, the handle mounting bracket and secure with plastic wing nuts.

  • Page 12: Maintaining Your Lawn Mower

    required due to normal wear on the cable. Adjustment Loosen hex nut which secures the adjustable cable is needed if all six speeds do not work. bracket. See Figure 14. Push back on the adjustable cable bracket and The adjustable cable bracket is located on the left side tighten hex nut.
  • Page 13 Periodically check all fasteners and make sure usually indicate that the air cleaner should be serviced. To service the air cleaner, refer to the these are tight. Follow the maintenance schedule under Customer separate engine manual packed with your unit. Responsibilities to get quality performance from The spark plug should be cleaned and the gap your lawn mower.
  • Page 14 speeds. I t maycause damage tothemower, a ndcould Remove the hex bolt from the rear of unit holding breakcausing personal injury. the transmission to the mower housing. Theblade canbetested bybalancing i t ona round See Figure 18. shaftscrewdriver. Remove m etal f romtheheavy side untilitbalances e venly.
  • Page 15 Pinch both sides of the belt together so that the belt Six-Speed is not in the pulley groove, and the lower pulley can Cable Slot Belt be pushed towards the engine. See Figure 22. Control Lower Pulley Belt Lower Pulley H Figure 22 Pivot the control arm back to its original position and reinstall the six-speed cable into the slot.

  • Page 16: Troubleshooting

    Refer to engine manual for correct engine storage NOTE: When storing any type of power equipment in a instructions. poorly ventilated or metal storage shed, care should be Coat mower's cutting blade with chassis grease to taken to rust-proof the equipment. Using a light oil or prevent rusting.
  • Page 17 Notes...
  • Page 18 Model979...
  • Page 19 Model979 Ref. Ref. Part No. Part Description Part Description Part No. 747-0824 Control Handle 734-1981 Wheel 9 x 2 731-0904A Upper Control Handle 712-0414 Top Lock Tab Weld Nut 1/4-20 16864 Ratchet Pawl Plate 6 Spd, Rack Cable Bracket 16855 731-0620 Control Lever 10622B...
  • Page 20 Model979...
  • Page 21 Model979 Ref. Ref. Part No. Part No. Part Description Part Description 736-0425 Bell Washer ,325 ID x ,930 OD 720-0223 Grip 756-0656 732-0803A Pulley Spring Lever 738-0529 736-3084 Flat Washer .510 ID x 1,120 OD Shoulder Nut ,825 x ,165 Lg, 710-0751 712-0896 Hex Jam Nut 1/4-28...
  • Page 24 MANUFACTURER'S LIMITED WARRANTY FOR: YaRD'MaN:}// The limited warranty set forth below is given by MTD PROD- c. Routine maintenance items such as lubricants, filters, blade sharpening and tune-ups, or adjustments such as UCTS INC ("MTD") with respect to new merchandise pur- brake adjustments, clutch adjustments...