Walker Rider Lawnmowers MB Owner's Manual

™OWNER’S MANUALSafety, Assembly, Operating, and Maintenance Instructionsand ILLUSTRATED PARTS MANUALModel MB (18 HP)Please Read and Save These Instruc

Component Identification8Front View and Right Side ViewNOTE: Control Identificationshown in OperatingInstructions section.Deck Discharge ShieldDeck Li

Component Identification 9Rear View and Left Side ViewOil DipstickLeft HandDrive WheelCylinder Head Cooling FinsOil FillMufflerTailwheel Forkand Wheel

Component Identification10Top View (Body Raised)Fuel TankParking BrakePositive (+) Battery CableOil DipstickRH Transmission Control ArmLH Transmission

Safety Instructions11Pay particular attention to any information labeledDANGER, WARNING, CAUTION, IMPORTANT,and NOTE in this manual.When you see the S

Safety Instructions126. Do not wear loose fitting clothing that could getcaught in moving parts. Do not operate thismachine while wearing shorts; al

Safety Instructions139. Watch for holes, rocks, and roots in the terrainand for other hidden hazards. When mowingtall grass, mow higher than desire

Safety Instructions145. If the engine must be running to perform a main-tenance adjustment, keep hands, feet, andclothing away from moving parts. Do

Safety Instructions 15SAFETY, CONTROL, AND INSTRUCTION DECALSSafety, Control, and Instruction Decals are installed on the machine;if any are miss

Safety Instructions16SAFETY, CONTROL, AND INSTRUCTION DECALSSafety, Control, and Instruction Decals are installed on the machine;if any are missing, i

Assembly Instructions17SETUP INSTRUCTIONSWalker Mowers are shipped partially assembled toour distribution network, and are typically assembledby the s

ForewordThank you. . .for purchasing a Walker mower. Every effort has been made to provide you with themost reliable mower on the market, and we are

Assembly Instructions18PTO Shaft Guard InstallationPosition the shaft guard as shown and mount withtwo 1/4-20 x 1/2 in. bolts.PTO Shaft Guard Installa

Assembly Instructions19Deck Counterweight Spring Installation5. Raise mower body (instead of lifting the front ofdeck) and clip the counterweight spr

Assembly Instructions20Deck Leveling1. Position mower on a smooth, level surface. Setthe cutting height to the highest position - 4 in.(102 mm) - fo

Assembly Instructions21PREOPERATING CHECKLISTBefore operating the mower for the first time, and asa routine before daily operations, it is important t

Assembly Instructions22IMPORTANT: DO NOT permit dirt or other foreignmatter to enter the fuel tank. Wipe dirt from aroundthe filler cap before removi

Assembly Instructions23Deck Secured in Tilt-Up Position CHECK MOWER BLADE CONDITION, SHARP-NESS, AND SECURITY OF MOUNTINGThe blade mounting nut shoul

Operating Instructions24CONTROL IDENTIFICATION, LOCATION, AND FUNCTION Ignition SwitchThe ignition switch is located on the right front of thebody and

Operating Instructions25Engine ChokeThe choke control lever (black knob) is located onthe left side of the seat. To start a cold engine, movethe chok

Operating Instructions26Parking BrakeThe parking brake functions by locking a detent arminto the transaxle outer control gear teeth. Movingthe lever

Operating Instructions27THROTTLEBLADE CLUTCH(PTO)PARKINGBRAKELEFT WHEELSTEERING LEVERForward Position(No Control Change)RIGHT WHEELSTEERING LEVERFORWA

Table of Contents1Owner’s ManualGeneral Information ________________ 3 HIGHLIGHTED INFORMATION _____________ 3GLOSSARY ____________________________

Operating Instructions28STARTING THE ENGINE1. Before attempting to start the engine, makesure the operator is in the seat, the ForwardSpeed Control is

Operating Instructions291. Move the FSC out of NEUTRAL-PARK positionto the desired forward speed. DO NOT hold for-ward on steering levers. It is not

Operating Instructions303. Reverse direction of the mower by pulling bothlevers backward.NOTE: Smooth action on the steering leverswill produce smooth

Operating Instructions31STOPPING THE MACHINE1. Slow the engine to idle; put the throttle in theIDLE position.2. Pull the steering levers to the NEUTRA

Operating Instructions32TRANSAXLE LOCKOUTSIMPORTANT: DO NOT TOW this mower with thetransmission lockout engaged. Towing can produceexcessive internal

Operating Instructions33• Make sure the mower is leveled properly for asmooth cut. Refer to Deck Leveling in AssemblyInstructions.• Use an alternatin

Maintenance Instructions34MAINTENANCE SCHEDULE CHART - RECOMMENDED SERVICE INTERVALS - MODEL MBService ItemDaily25 Hours50 Hours100Hours250Hours Yearl

Maintenance Instructions BRIGGS & STRATTON TIPS35IMPORTANT TIPS FOR CARE OF THEBRIGGS & STRATTON ENGINEFuel System• Fuel must be clean - free

Maintenance Instructions LUBRICATION36LUBRICATIONProper lubrication is an important maintenance pro-cedure. It reduces wear and makes the machinequie

Maintenance Instructions LUBRICATION373. Remove the dipstick and oil drain plug, and drainoil into a suitable container. Be sure to allowample time

Table of Contents2REPLACING/REPAIRING ________________ 46Drive Belts __________________________ 46Engine/PTO Belt ____________________ 47Ground Dri

Maintenance Instructions LUBRICATION38Ident Lubrication No.No. Location Type PlacesIdent Lubrication No.No. Location Type Places 'HFN&DVWH

Maintenance Instructions LUBRICATION39345778119131617186124767111222 & 2320 & 24212019 151210121422Chassis and Deck Lubrication Points

Maintenance Instructions LUBRICATION40Mower Deck Gearbox LubricationThe mower deck gearboxes (tee gearbox and bladedrive gearboxes) are connected as a

41Maintenance Instructions LUBRICATION/CLEANINGTransaxle Oil Filter Location3. Reinstall drain plugs.4. Place 6” (15 cm) block under the left hand dri

Maintenance Instructions CLEANING42Clean Cooling Fins and FanAir Cleaner SystemThe engine is equipped with a paper air cleaner ele-ment with an oiled

43Maintenance InstructionsCLEANING/CHECKING/SERVICING1. Raise the deck lock lever handle on each side ofthe carrier frame and pull out to release carr

44Maintenance Instructions CHECKING/SERVICINGSecurity of Air Cleaner SystemNOTE: The following inspection is only an externalinspection and should be

45Maintenance Instructions CHECKING/SERVICING3. Check the blades for straightness by markingthe blade tip position inside the deck housing,and then ro

46Maintenance InstructionsCHECKING/SERVICING/REPLACING/REPAIRINGSpark PlugsEvery 100 hours, remove the spark plugs, inspect,clean, and reset the gap (

Maintenance Instructions REPLACING/REPAIRING47Engine/PTO Belt1. To remove the engine/PTO belt:a. Loosen and remove idler tension bolt andjam nut.b. Re

General Information3HIGHLIGHTED INFORMATIONWalker Manufacturing recommends that any ser-vice requiring special training or tools be performedby an aut

Maintenance Instructions REPLACING/REPAIRING48Ground Drive Belt1. To remove the ground drive belt:a. Raise the spring-loaded idler to relax belt.b. Sl

49Maintenance Instructions REPLACING/REPAIRINGFuel FilterModel MB is equipped with an in-line fuel filter.Visually inspect the filter periodically, an

50Maintenance Instructions REPLACING/REPAIRING2. Rotate U-joint on shaft to align the shear pin holewith the hole (and shear pin fragment) in theshaft

51Maintenance Instructions ADJUSTMENTSADJUSTMENTSTransmission ControlIMPORTANT: The proper adjustment of the transax-le control stops is essential for

52Maintenance Instructions ADJUSTMENTSNeutral Position Adjustment - Step 31. With the Forward Speed Control (FSC) in neu-tral, the lever should be str

53Maintenance Instructions ADJUSTMENTS6. One at a time adjust the left and right ControlRods to find the center of the neutral window.Shorten the rods

54Maintenance Instructions ADJUSTMENTSNeutral Switch Adjustment - Step 61. Place the FSC in neutral position. Loosen thebottom lock nut and adjust swi

55Maintenance InstructionsADJUSTMENTS/ELECTRICAL SYSTEMPTO Belt TensionPTO belt tension can be adjusted by lengthening orshortening the position of th

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General Information4Tractor Serial Number LocationMower Deck Serial Number LocationENGINE SERIAL NUMBER LOCATIONThe Briggs & Stratton engine model

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Specifications5MODEL MBENGINEManufacturer/Model Briggs & Stratton Vanguard, 2 Cyl. OHV (Air-Cooled)Displacement 34.7 cu. in. (570 cc)HP (@ 3600 RP

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73LIMITED WARRANTYFORWALKER MODEL MBRIDER MOWER1. WHAT THIS WARRANTY COVERS, AND FOR HOW LONG:Walker Manufacturing company will, at its option, repair

WALKER MFG. CO. • 5925 E. HARMONY ROAD, FORT COLLINS, CO 80528 • (970) 221-5614FORM NO. 090106 PRINTED IN USA www.walkermowers.com ©2007 WALK

Specifications6MODEL MBTRANSMISSION (continued)Neutral Transmission Release by Manual Dump ValveFinal Drive Direct Drive Axle from TransaxleTransmissi

Specifications7MODEL MBDIMENSIONS (continued)48 in. (122 cm) SD Model(with Deflector)53-3/4 in. (137 cm)56 in. (142 cm) SD Model(with Deflector)61-3/4