Briggs & Stratton MB (18 HP) Engaging the Mower, Blade Clutch Engaged Blade Clutch Disengaged

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Operating Instructions

3.Reverse direction of the mower by pulling both levers backward.

NOTE: Smooth action on the steering levers will produce smooth mower operation. Remem- ber to keep the engine and ground speed slow until learning the control response.

4.The FSC may be adjusted forward for faster ground speed and backward for slower ground speed. When mowing, ground speed should be adjusted to match the load on the cutter blades, i.e., as the engine pulls down in heavy cutting, pull back on the FSC lever to reduce ground speed. Adjusting ground speed helps maintain a balance between engine power and blade speed for high-quality cutting action.

5.Stop ground travel by pulling both steering levers backward to the NEUTRAL-PARKposi- tion (tractor not moving) and then moving the FSC lever to the NEUTRAL-PARKposition.

NOTE: If the tractor creeps forward or back- ward with the FSC lever in the NEUTRAL-PARKposition, the transmission control needs to be adjusted. Contact your Walker Dealer.

ENGAGING THE MOWER

1.Set the engine throttle at about 1/2 speed. DO

NOT attempt to engage the blade clutch at high engine speeds. This will drastically short- en drive belt and clutch life. Use only moderate engine speed when engaging the blade clutch.

2.Pull up the blade clutch toggle switch to engage the mower blades.

CAUTION

A safety interlock switch (seat switch) will cause the engine to stop if the blade clutch is engaged and the operator is not in the seat. The function of this switch should be checked by the operator rais- ing off the seat and engaging the blade clutch; the engine should stop. If the switch is not working, it should be re- paired or replaced before operating the mower. DO NOT disconnect the safety switches; they are for the operator’s pro- tection.

IMPORTANT: DO NOT engage the blade clutch when transporting the mower across drives, side- walks, loose materials, etc. DO NOT engage the blade clutch with the PTO shaft disconnected (the mower deck removed from tractor).

Blade Clutch Engaged

Blade Clutch Disengaged

CAUTION

If the cutting blades strike a stationary object while mowing, stop the mower im- mediately, disconnect the spark plug wires, lift the deck, and inspect the deck and blades thoroughly for damage. Make sure that the blade timing has not been disturbed (the blades should be at 90 de- grees to each other). Refer to REPLAC- ING/REPAIRING the Blade Overload Shear Bolts in Maintenance Instructions if blades are out of time. Also, make sure the blade retaining nuts are torqued to 60 ft-lb (81.3 Nm).

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Contents Illustrated Parts Manual Foreword Table of Contents Main Component Hydrostatic GroundSteering Control Assemblies Spread Tail Wheel Axle KITGeneral Information GlossaryIdentifying Number Locations Fill In By PurchaserServicing of Engine and Drivetrain Components Specifications EngineElectrical System TransmissionTire Pressure Blade DriveTire Size Mower Deck Drive BeltsSeat FRAME/BODY ConstructionComponent Identification Front View and Right Side ViewRear View and Left Side View Top View Body Raised Do not mow with bystanders in the area Safety InstructionsBefore Operating Operating Maintenance Case of a clogged or plugged mower deckSafety Instructions SAFETY, CONTROL, and Instruction Decals SAFETY, CONTROL, and Instruction Decals Assembly Instructions Setup InstructionsBattery Service Deck Caster Wheel InstallationPTO Shaft Guard Installation Deck InstallationMower Deck Installation PTO Shaft ConnectionDeck Counterweight Spring Installation Deck Leveling Body Rod in Engaged Position Body Rod in Stowed PositionCheck Engine Crankcase OIL Level Adjust Mower Cutting HEIGHT, if RE- Quired Operating Controls Operating InstructionsControl IDENTIFICATION, LOCATION, and Function PTO Switch Engine ChokeEngine Throttle Choke and Throttle Location Forward Speed Control FSCHydro Lockout Rod Location Hourmeter Left Wheel Right Wheel Steering Lever Operating Controls Top View from Drivers Point of ViewDisengaged Adjusting Ground Speed and SteeringStarting the Engine Correct Operator Hand Position on the Controls Engaging the Mower Blade Clutch Engaged Blade Clutch DisengagedCutting Height Adjustment Stopping the MachineTransaxle Lockouts Hydro Lockout Rod Freewheel PositionHydro Lockout Rod Normal Operating Position Recommendations for MowingSide Discharge Shield in Lowest Position Maximum Recommended Side SlopeMaintenance Instructions Service Item 100 250 Daily Hours YearlyImportant Tips for Care of the Briggs & Stratton Engine Lubrication Engine OilEach USE Dipstick Operating RangeDipstick and Oil Fill View from above left side of tractor Grease Fitting and Oil Point LubricationLubrication Maintenance Instructions Mower Deck Gearbox Lubrication Transaxle LubricationCleaning Keep Engine Screen CleanTransaxle Oil Filter Location Transaxle Drain Plugs View from underside of tractorCleaning Clean Cooling Fins and Fan Air Cleaner SystemDeck Secured in Tilt-Up Position CHECKING/SERVICINGBattery Cleaning the TerminalsBatteries Produce Explosive Gases Tire PressureDrive Belts Mower Blade Profile For SharpeningBlade Balanced on Magnetic Wall-Mounted Balancer REPLACING/REPAIRING Spark PlugsBreaker Points Belt LocationsEngine/PTO Belt Remove Belt GuardEngine/PTO Belt Disengaged Engine/PTO Belt EngagedGround Drive Belt Assembly Disengaged Ground Drive Belt Assembly EngagedFuel Filter Fuel Filter LocationCutting Blade Shear Bolts PTO Shear PinMower Blades Adjustments Steering Lever Position Adjustment StepStop Bolt Location Stop Bolt Adjustment Steering Handles Adjustment StepSteering Lever Adjustment Neutral Position Adjustment StepFSC Position Steering Adjustment Actuator Rod Length AdjustmentFull Forward Speed Adjustment Step Straight Tracking Adjustment StepNeutral Window Neutral Travel EndNeutral Travel End Adjust Neutral Switch Adjustment StepFSC Switch Location Forward Speed Control Friction Adjustment StepADJUSTMENTS/ Electrical System Tilt-Up Deck Adjustable Stop75$&725&$/6 0DLQWHQDQFHHFDOVRefer to Decks Parts Manual 13 for Deck Decals +$66,6$660% 7LOW8S/DWFK$VVHPEO\Dvwhqhuv KDVVLV$VVHPEO\F009 $,1&203211732575$160,66,21 372ULYH$VVHPEO\ DvwhqhuvF051 KRNHDQG7KURWWOH$VVHPEOLHV 5283XHO7DQN$VVHPEO\ F392 3DUNLQJ%UDNH$VVHPEO\ +5267$7,&*52815,9$660%/,6URXQGULYH$VVHPEOLHV F066 7UDQVPLVVLRQ6SULQJ$VVHPEOLHV 675,1*&21752/$660%/,66WHHULQJ/HYHU6&$VVHPEOLHV Dvwhqhuv F183 75,&$/$660% OHFWULFDO$VVHPEO\ DvwhqhuvDetail a 635$7$,/+/$/.,7 6SUHDG$OH.LW DvwhqhuvF016 6&+0$7 Limited Warranty For Walker Model MB Rider Mower Sound Model MB Sound Test