Yard-Man 791 Operator's Manual
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Yard-Man 791 Operator's Manual

Yard-Man 791 Operator's Manual

Hydrostatic lawn tractor
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Operator's Manual
Hydrostatic
Lawn Tractor
MODEL 791
IMPORTANT:
Read safety rules and instructions
carefully
before operating
equipment.
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 44136-9722,
MTB LLC, P.O. BOX361131CLEVELAND,OHIO44136-9722
PRINTED IN U.S.A.
FORM NO. 769-01624A
(1/31/2005)

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Summary of Contents for Yard-Man 791

  • Page 1 Operator's Manual Hydrostatic Lawn Tractor MODEL 791 IMPORTANT: Read safety rules and instructions carefully before operating equipment. 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...

  • Page 2: Table Of Contents

    TABLEOFCONTENTS Content Page Content Page Maintenance Customer Support Service Important Safe Operation Practices Tractor Set-up Off-season Storage Controls Attachments & Accessories Operation Warranty Back Cover FINDINGMODELNUMBER This Operator's Manual is an important part of your new lawn tractor. It will help you assemble, prepare and maintain the unit for best performance.

  • 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 23. Muffler a ndengine become hotandcancause a Follow the manufacturer's recommendations burn. D onottouch. wheel weights or counterweights to improve 24. Check overhead c learances c arefully b efore driving stability. under lowhanging treebranches, wires, d oor Use extra care with grass catchers or other openings e tc.,where theoperator m aybestruck or attachments.
  • Page 5 e. Useextreme carewhen approaching blind lock-open device. corners, d oorways, shrubs, t rees or other Extinguish all cigarettes, cigars, pipes and objects thatmayblock yourvision ofa child other sources of ignition. whomayrunintothemachine. Neverfuel machine indoors. f. Toavoidback-over a ccidents, a lways Never remove gas cap or add fuel while the disengage thecuttingblade(s)before engine is hot or running.
  • Page 6 8. Never t amper w iththesafety interlock s ystem or Forsafety protection, frequently c heckcomponents othersafety devices. Check theirproper o peration andreplace immediately withoriginal e quipment regularly. manufacturer's (O.E.M.) parts only,listedinthis 9. Afterstriking a foreign object, s toptheengine, manual. "Useofpartswhich donotmeet t he disconnect thesparkplugwire(s) a ndground original e quipment specifications maylead to against theengine.
  • Page 7 Sight and hold this level with a vertical tree... I.LI I.LI 15° I.LI...

  • Page 8: Tractor Set-Up

    SECTION 3: TRACTOR SET-UP IMPORTANT:Your tractor is shipped with motor oil in the engine. However, you MUST check the oil level before starting the engine and operating the tractor. Refer to the separate engine manufacturer's Operator/Owner Manual packed w th your tractor. Read nstruct ons carefu y. LooseParts Shipping BraceRemoval Packaged with this Operator's Manual you'll find:...
  • Page 9 Attaching theBatteryCables GasandOilFill-up The gasoline tank is located under the hood and has a NOTE: Some models are shipped with the battery capacity of 1-1/2 gallons. Do not overfill. cables already connected. WARNING: extreme care when IMPORTANT:The positive battery terminal is marked handling gasoline.
  • Page 10 Attaching TheSeat Standard Adjustment Seat styles vary by tractor model and there are three HexScrews different styles available: • Standard Adjustment • Quick Adjustment & • Knob Adjustment Shoulder Refer to Figure 4, Figure 5 and Figure 6 to identify your Screws tractor's seat style and follow applicable instructions below.

  • Page 11: Controls

    SECTION 4: KNOW YOUR LAWNTRACTOR Figure 7 Parking Brake Lever Throttle Control Lever brake Pedal Ignition Switch Module Speed Control Lever Deck Lift Lever Choke Control (on models so equipped) PTO (Blade Engage) Lever NOTE: Any reference in this manual to the RIGHT or LEFT side of the tractor is observed from operator's position.
  • Page 12 ThrottleControl L ever ParkingBrakeLever The throttle control lever is located on the right side of To set the parking brake, fully the tractor's dash panel. This lever controls the speed depress the brake pedal. Move the of the engine and, on most models, when pushed all the parking brake lever all the way down way forward, the choke control also.
  • Page 13 SpeedControl L ever IgnitionSwitchModule The speed control lever, located on the left fender, WARNING: Never leave a running machine allows you to regulate the travel direction and ground unattended. Always disengage PTO, move speed of the lawn tractor. To use, release the parking shift lever into neutral position, set parking brake and move the speed control lever forward (to...

  • Page 14: Operation

    SECTION 5: OPERATING Y OUR LAWNTRACTOR SafetyInterlock Switches Depress the REVERSE PUSH BUTTON (Orange, Triangular Button) at the top, right corner of the key This tractor is equipped with a safety interlock system switch module. The red indicator light at the top, left for the protection of the operator.
  • Page 15 IMPORTANT: Do NOT hold the key in the START position for longer than ten seconds at a time. Doing so WARNING may cause damage to your engine's electric starter. • After the engine starts, deactivate the choke control AVOID SERIOUS INJURY ORDEATH and place the throttle control in the FAST position.
  • Page 16 IMPORTANT: First-time operators should use slower Engaging the Blades speeds. Become completely familiar with the tractor's Engaging the PTO (Blade Engage) transfers power to operation and controls before operating the tractor in at the cutting deck or other (separately available) higher speed.
  • Page 17 Mulching Moving TheTractorManually Your tractor's transmission is equipped with a Some, NOT ALL, models come equipped with a mulch hydrostatic relief valve for occasions when it is kit which incorporates special blades, already standard necessary to move the tractor manually. Activating this on your tractor, in a process of recirculating grass valve forces the fluid in the transmission to bypass its clippings repeatedly beneath the cutting deck.
  • Page 18 SECTION 6: MAKING ADJUSTMENTS • Retighten the jam nut loosened earlier after proper adjustment is achieved. adjustments while engine is running, WARNING: Never attempt to make any except where specified in the operator's Sideto Side manual. If the cutting deck appears to be mowing unevenly, a side to side adjustment can be performed.
  • Page 19 Standard Adjustment Seat To adjust the position of the seat, loosen the two hex HexScrews screws on the bottom of the seat. See Figure 15. Slide the seat forward or backward as desired. Retighten the two screws. Quick Adjustment S eat (if soequipped) To adjust the position of the seat, move the seat adjustment lever (located under the seat) to the left and...
  • Page 20 DragLinkAdjustment ParkingBrakeAdjustment If the tractor turns tighter in one direction than the other, WARNING: Never attempt to adjust the or if either the drag link and ball joint are being replaced brakes while the engine is running. Always due to damage or wear, the drag link may need to be disengage PTO, move speed control lever adjusted.

  • Page 21: Maintenance

    SECTION 7: MAINTAINING YOUR LAWNTRACTOR • Service the oil filter (if so equipped) as instructed WARNING: Before performing in the separate engine manufacturer's Operator/ maintenance or repairs, disengage PTO, Owner Manual packed with your unit. move shift lever into neutral position, Perform the above steps in the opposite order after oil parking brake, stop engine and remove key to...
  • Page 22 Cleaning theEngine AndDeck Any fuel or oil spilled on the machine should be wiped off promptly. Do NOT allow debris to accumulate around the cooling fins of the engine or on any other part of the machine. IMPORTANT:The use of a pressure washer to clean your tractor is NOT recommended.

  • Page 23: Service

    SECTION 8: SERVICE Cutting DeckRemoval IdlerBracket NOTE: Models equipped with a 38-inch deck have one deck idler pulley. Models equipped with a 42-inch deck have two deck idler pulleys. To remove the cutting deck, proceed as follows: • Place the PTO (Blade Engage) lever in the disengaged (OFF) position.
  • Page 24 Battery Cleaning Clean the battery by removing it from the tractor and The battery is sealed and is maintenance-free. Acid washing with a baking soda and water solution. If levels cannot be checked. necessary, scrape the battery terminals with a wire •...
  • Page 25 Idler Bracket 42-Inch Deck Engine Pulley Right Hand Pulley (beneath belt guard) © Left Hand Pulley (beneath belt guard) Deck Idler Pulleys 38-Inch Deck Idler Bracket Engine Pulley Right Hand Pulley (beneath belt guard) Left Hand Pulley (beneath belt guard) Deck Idler Pulley...
  • Page 26 IMPORTANT:Use a torque wrench to tighten the blade Hex F lange Nut spindle hex flange nut to between 70 foot-pounds and 90 foot-po unds. Changing theDeckBelt WARNING: Be sure to shut the engine off, remove ignition key, disconnect the spark plug wire(s) and ground against the engine to prevent unintended starting before removing the belt(s).

  • Page 27: Off-Season Storage

    SECTION 9: OFF-SEASON S TORAGE Clean and lubricate the tractor as instructed in Section 7: Follow the instructions in the Service, Storage & MAINTAINING YOUR LAWN TRACTOR on page 21 of this Specifications section of the engine manufacturer's manual before storing for an extended period. Operator/Owner Manual for proper engine care prior to storing your tractor.
  • Page 28 SECTION 11: TROUBLESHOOTING Trouble Corrective Action Possible Cause(s) Engine fails to start PTO engaged. Place PTO lever in disengaged (OFF) position. Parking brake not engaged. Engage parking brake. Spark plug wire(s) disconnected. Connect wire(s) to spark plug(s). Throttle control lever not in correct Place throttle control in FAST position or CHOKE posi- starting position.
  • Page 29 NOTES...
  • Page 30 NOTES...
  • Page 31 NOTES...

  • Page 32: Warranty

    MANUFACTURER'S LIMITED WARRANTY FOR: YaRD.MaN ® The limited warranty set forth below is given by MTD LLC with MTD does not extend any warranty for products sold or respect to new merchandise purchased and used in the exported outside of the United States, its possessions United States, its possessions and territories.

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