Operator's M nual Lawn Tractor Model 624 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, brushcovered 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 attester is used, it should be maintained in effective working order by the operator.
TABLEOFCONTENTS Content Page Important Safe Operation Practices ................................................................... 3 Important Note to First-time Operators .............................................................. 7 Slope Gauge ...................................................................................................... 8 Tractor Set-up .................................................................................................... 9 Know Your Lawn Tractor ......
SECTION1: IMPORTANT SAFEOPERATION PRACTICES 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.
23. Mufflerandenginebecomehotandcancausea 5. Use extra care with grass catchers or other burn.Donottouch. attachments. These can change the stability of the machine. 24. Checkoverhead clearances carefullybeforedriving underlowhangingtreebranches, wires,door 6. Keep all movement on the slopes slow and gradual. openingsetc.,wheretheoperatormaybestruckor Do not make sudden changes in speed or direction. pulledfromtheunit,whichcouldresultinserious Rapid engagement or braking could cause the front injury.
f. g. Disengage the cutting blades before moving both control handles into reverse. The "NoCut-In Reverse" feature is a reminder not to cut in reverse and to help avoid back over accidents. Do not defeat it. g. h. Keep children away from hot or running engines. They can suffer bums from a hot muffler. allow space for fuel expansion. Replace gasoline cap and tighten securely. If gasoline is spilled, wipe it off the engine and equipment. Move unit to another area.
9. Afterstrikingaforeignobject,stoptheengine, 12.Donotchangetheenginegovernorsettingsor disconnect thesparkplugwire(s)andground over-speed theengine.Thegovernorcontrolsthe againsttheengine.Thoroughly inspectthe maximum safeoperating speedoftheengine. machineforanydamage.Repairthedamage 13.Maintainorreplacesafetyandinstruction labels,as beforestartingandoperating. necessary. 10. Neverattempttomakeadjustments or repairsto 14.Observe proper disposal laws and regulations for themachine whiletheengineis running.
SECTION2: IMPORTANT NOTETOFIRST-TIMEOPERATORS The Revolution TM lawn tractor has a number of unique features. For example, there is a single pair of Control Handles which replace the steering wheel, forward!reverse shift lever, speed control and brake pedal typically found on conventional lawn tractors. Because of Revolution's TM unique controls, all first-time operators should thoroughly familiarize themselves with the function of all controls before beginning to mow.
SIGHT AND HOLD THIS LEVEL WITH A VERTICAL TREE 1,9 A POWER POLE I A CORNER OF A BUILDING n,i I OR A FENCE POST I I I cO 10 ° #. =, _WARNING Z n n iii Do not use the riding mower on inclines with a slope in excess of 10 degrees (a rise of approximately dding mower could overturn and cause serious injury. Operate RIDING mowers up and down slopes, never across the face of slopes. 2 feet every 10 feet).
SECTION4: TRACTOR SET-UP AttachingtheBatteryCables NOTE: The positive battery terminal is marked Pos. (+). The negative battery terminal is marked Neg. (-). The positive cable (heavy red wire) is secured to the positive battery terminal (+) with a hex bolt and hex nut at the factory. Make certain that the rubber boot covers the terminal to help protect it from corrosion. Remove the hex bolt and wing nut from the negative cable.
SECTION5: KNOWYOURLAWNTRACTOR G H A B I C J D K L M F.
ThrottleControlLever Refer to StartingTheEngineon page 14 of this manual for detailed starting instructions The throttle lever is located on the right side of the tractor's dash panel. This lever controls the speed of the engine, and on some units the choke control also. When set in a given position, the throttle will maintain a uniform engine speed. See Figure 4. Choke Position Fast The ignition switch is also used to operate the tractor's headlights.
ControlHandles ChokeControl The control handles are located in the center of the On some units, moving the throttle lever all the way forward activates the engine's choke control. On all other units, the choke control can be found in the tractor's dash. Moving the handles forward or rearward controls both the ground speed of the tractor and the direction of travel. When released, the control handles will return to their original STOP (neutral) position.
Electric PTO SeatAdjustmentLever (PowerTake-off)Knob To adjust the seat forward or backward, slide the seat adjustment lever to the left and reposition the seat to the desired position. Once a comfortable position is found, release the seat adjustment lever to lock the seat in place. Refer to SEATADJUSTMENT on page 19 of this manual for more detailed instructions. To engage the power to the cutting deck, pull outward on the PTO knob. Push the PTO knob inward to disengage the power to the cutting deck.
Position the adjustable hand rest forward or rearward until a comfortable position is found for your application. Release the bail to lock the adjustable hand rest in place. StartingtheEngine NOTE: Refer to the TRACTORSET-UPon page 9 of this manual for Gasoline and Oil fill-up instructions. Insert the tractor key into the ignition switch. Place the PTO knob in the disengaged (OFF) position. Engage the tractor's parking brake. Release both control handles.
Control Handle Position Reference Chart m m m ForwardStraight ForwardRight ] i RotateLeft RotateRight m m m ] ReverseLeft i ReverseStraight 15 ReverseRight
Usingthe DeckLift Lever WARNING: Never leave a running machine unattended Always turn off blades/ PTO, move both control handles into neutral position, set parking brake, stop engine and remove key before dismounting. To raise the cutting deck, move the deck lift lever to the left, then place it in the notch best suited for your application. Refer to SettingThe CuffingHeightearlier in this section.
Never attempt to mulch if the lawn is damp. Wet grass tends to stick to the underside of the cutting deck preventing proper mulching of the clippings. Do NOT attempt to mulch more than 1/3 the total height of the grass or approximately 1-1/2 inches. Doing so will cause the clippings to clump up beneath the deck and not be mulched effectively. Maintain a slow ground speed to allow the grass clippings more time to effectively be mulched.
MovingtheTractorManually The Revolution TM lawn tractor has two transmissions, both of which are equipped with a hydrostatic bypass valve for occasions when it is necessary to move the tractor manually. Opening these valves forces the fluid in each transmission to bypass its normal route, allowing the rear tires to "freewheel." To open the hydrostatic bypass valves, proceed as follows: Locate the hydrostatic bypass rods in the rear of the tractor. See Figure 12.
Balancethedeckbyusinga wrenchtoturnthe adjustment gear(foundimmediately behindthehex capscrewjustloosened) clockwise/up or counterclockwise/down. The deck is properly balanced when both blade tip measurements taken earlier are equal. Retighten the hex cap screw on the left deck hanger bracket when proper adjustment is achieved.
Loosen the jam nut found to the rear of the yoke, threaded onto the control cable. See Figure 15. Remove the hairpin clip securing the yoke to the transmission and slide the clevis pin out of the yoke. See Figure 15. Save both pins as they will be reinstalled in later steps. Move the tractor to a smooth, flat surface. Chock the left, rear tire and place the parking brake lever in the disengaged position. Remove the hubcap from the right, rear wheel.
SECTION8: MAINTAININGYOURLAWNTRACTOR IMPORTANT: Refer to the Briggs & Stratton Operator/ Owner Manual packed with your unit for information regarding the proper weight of motor oil. WARNING: Before performing any maintenance or repairs, always turn off blades/PTO, move both control handles into neutral position, stop engine and remove key before dismounting.
Rear Wheels The rear wheels should be removed from the axles once a season. Lubricate the axles and the rims well with an all-purpose automotive grease before reinstalling them. Front CastorWheels Each of the front castor wheel axles and rims is ) equipped with a grease fitting. Lubricate with a grease gun after every 25 hours of tractor operation or at least once a season. See Figure 19.
IMPORTANT: The V-belts found on your tractor are specially designed to engage and disengage safely. A substitute (non-OEM) V-belt can be dangerous by not disengaging completely. For a proper working machine, use factory approved belts. Grasp the rearmost portion of the PTO idler bracket and pivot it toward the discharge chute to relieve tension on the PTO belt. Remove the PTO belt from the electric PTO clutch and from around the PTO idler pulley.
ChangingtheTransmission DriveBelt WARNING: Be sure to shut the engine off, remove ignition key, disconnect the spark plug wire(s) and ground against the engine prior to removing the belt(s) IMPORTANT: The V-belts found on your tractor are specially designed to engage and disengage safely. A substitute (non-OEM) V-belt can be dangerous by not disengaging completely. For a proper working machine, use factory approved belts.
A poorly balanced blade will cause excessive vibration and may cause damage to the tractor and result in :_ersonal injury. CuttingBlades WARNING: Be sure to shut the engine off, remove ignition key, disconnect the spark plug wire(s) and ground against the engine before removing the cutting blade(s) for sharpening or replacement. Protect your hands by using heavy gloves or a rag to grasp the cutting blade.
Always keep the battery cables and terminals clean and free of corrosive build-up. After cleaning the battery and terminals, apply a light coat of petroleum jelly or grease to both terminals WARNING: Batteries give off an explosive gas while charging. Charge battery in a well ventilated area and keep away from an open flame or pilot light as on a water heater, space heater, furnace, clothes dryer or other gas appliances.
SECTION12: TROUBLESHOOTING Trouble Possible Engine fails to start PTO switch engaged. Parking brake not engaged. Spark plug wire(s) disconnected. Throttle control lever not in correct starting position. Choke not applied. Corrective Cause(s) Fuel tank empty, or stale fuel. Blocked fuel line. Engine runs erratic Faulty spark plug. Engine flooded. Unit running with CHOKE applied. Spark plug wire loose. Blocked fuel line or stale fuel. Vent in gas cap plugged. Water or dirt in fuel system.
SECTION 13: MODEL624PARTSLIST 13.,.
Model624 REF. NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 PART NO. 710-0376 710-0599 710-0642 710-0895 710-0924 710-3015 712-0292 712-3004A 712-3006 726-0201 731-1978 731-1979 731-1980A 731-1981A 731-1982A 731-1995 731-1996 731-2272 736-0173 736-0329 736-0342 736-3078 747-1132A 783-0808A 783-1000A 683-0425 683-0453 710-0506 712-0239 712-0431 714-3001 731-0374 REF. NO. 33 34 35 36 37 38 39 40 41 42 43 44 DESCRIPTION Hex Cap Screw, 5/16-18 x 1.
Model624 36 \ " 62 82 86 46 31 2 22 30 \, 9 16 30 27
Model624 REF. NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 PART NO.
Model624 15 39 16 2O 22. I - Dash support portion shown for referenceon_y. ' ~ ' \ \ 28 32
Model624 REF. NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 PART NO.
Hook spring Model624 _Ro,._g_horo. > oo 22 26 5 36 Suppod pSateshown for refsrenc8 onJy. 10 I 37 34 Hook spring (Ref. 21) here.
Model624 REF. NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 PART NO.
Model624 __ 36 Units Equipped w/46-inch Deck __ Units Equipped w/42-inch Deck
Model624 REF. NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 PART NO. 683-0450 710-0520 710-0831 710-1238 710-3144 712-0229 712-0431 712-3004A 712-3017 714-0470 732-0384 732-0991A 736-0140 736-3010 738-0372 748-0415A 756-0627B 756-1208 783-0891B 683-0297 710-3180 712-3010 732-0978 738-3056 710-3025 783-1003 783-0653D 683-0314 717-1708 754-0497 754-0474 710-0859 738-0785 736-0171 710-3157 DESCRIPTION Engagement Plate Assembly Hex Cap Screw, 3/8-16 x 1.
Model624G ?_.. 2..
Model624G REF. PART NO. NO.
Model624H 46_ 4 27 I I 2O ® J 3o.._ 29,,,_ o 15 / 39 r..
Model624H REF. PART NO. NO.
Model624 (for choke) Briggs& Stratton IntekTwin 0 I 18 20_ I 6 j (deflector must face forward) Briggs& Stratton IntekSingle 10 (deflector must 14 42 faceforward)
Model624 REF. NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 PART NO. 710-0227 710-0599 710-0604A 710-1237 710-1314 710-1315 712-3017 721-0460 726-0205 736-0119 736-0300 751B221535 751-0535 751-0564 751-0616 751-0650 751-0651 751-3140 751-3141 751-3142 783-0615 783-0625B 722-0263 746-1086 746-1084 751-0619 751B213146 751-0617 712-0271 721-0208 732-0966 DESCRIPTION Self-tapping Screw, #8-18 x .5 Self-tapping Screw. 1/4-20 x .5 Self-tapping Screw, 5/16-18 x .
Model624 2 s J 3 18 17 4 16 _ _6 2O _, _15 22 14 44 12
Model624 REF. NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 PART NO.
Model624 REF. PART NO. NO. 1 634-0210 634-0209 734-0255 734-2018 2 710-0180 3 731-2290A 4 736-0356 5 736-0372 6 710-0604A 7 783-1069 8 748-0452 9 711-1601 10 714-0104 11 726-0272 DESCRIPTION Wheel Assembly Complete, 20 x 7 Rim Only Air Valve Tire Only, 20.4 x 7.0 x 8.0 Turf Master Hex Cap Screw, 3/8-24 x .75 Hub Cap Bell Washer, .391 x 1.38 x .062 Flat Washer, .410 x 1.59 x .062 Self-tapping Screw, 16-18 x .625 Cable Bracket Control Yoke Clevis Pin, .3125 x .
NOTES 47
MANUFACTURER'S LIMITED WARRANTY FOR: YaRD-MaNY,f/ The limited warranty set forth below is given by MTD PRODUCTS INC ("MTD") with respect to new merchandise purchased and used in the United States, its possessions and territories. MTD warrants this product against defects in material and workmanship for a period of two (2) years commencing on the date of original purchase and will, at its option, repair or replace, free of charge, any part found to be defective in material or workmanship.
