Bolens 769-00407 Sharpening or Replacing Chipper Blade, Disconnect and ground the spark plug wire

Page 15

SHARPENING OR REPLACING CHIPPER BLADE

Because the engine on this unit has a tapered crankshaft, a special impeller removal tool (part number 753-0900) is required to remove the impeller assembly. For further assistance, contact your Sears Service Center.

NOTE: When tipping the unit, empty the fuel tank and keep engine spark plug side up.

•Disconnect and ground the spark plug wire.

•Remove the front hubcaps, lock nuts, front wheels, and wave washers that attach to the pivot arm assemblies. See Figure 17.

•Remove the shoulder screws and bell washers that go through the pivot arms and height bracket adjusters to the front support brace.

Pivot Arm Assembly

 

Bell Washer

 

Wave Washer

 

Hubcap

Height Adjustment

 

Bracket

 

Shoulder

 

Screw

Lock Nut

 

Figure 17

•Remove the three screws on the upper housing that secure the nozzle cover and the nine screws that secure the lower housing to the upper housing. See Figure 18.

Housing

 

Screws

 

Nozzle

Lower Housing

Screws

Screws

 

Figure 18

•Remove lock nut that secures flail screen to the lower housing. The flail screen does not have to be removed. Refer to Figure 15.

•Remove the hex bolt, lock washer, and flat washer that secure the impeller assembly to the crankshaft. See Figure 19.

Upper

Housing

Chipper

Blade

Impeller

Assembly

Hex Bolt

Lock Washer

Flat Washer

Flail

Blade

BOTTOM VIEW

Figure 19

•Apply lubricant to the threads of impeller removal tool and then thread the tool into the crankshaft. Stop when the impeller assembly can move on the crankshaft.

•Remove the impeller assembly from the crankshaft. Unthread the impeller removal tool from the impeller assembly.

•Remove the chipper blade using a 3/16" allen wrench on the outside of the blade and 1/2" wrench on the underside of impeller assembly.

•Replace or sharpen chipper blade.

•When sharpening blade, protect hands by using gloves and follow the original angle of grind.

•Reassemble by performing the previous steps in reverse order.

•Tighten blade screws to 210 - 250 in-lbs.

•Tighten impeller bolt to 375 - 425 in-lbs.

NOTE: Make certain chipper blade is reassembled with the sharp edge facing upward. See Figure 20.

Flail

Chipper

Blade

Blade

 

 

Impeller

 

Assembly

Figure 20

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Contents Yard Vacuum Warranty Table of ContentsSafety TrainingPreparation Operation Maintenance and StorageLoose Parts in Carton See Figure Disconnecting Spark PlugAssembly Removing Unit from CartonAttaching The Hose Assembly Attaching the BAGAttaching the Blower Chute Front Tab Locking Rod Throttle Control / Choke Lever Bag Nozzle Height Adjustment LeverChipper Chute NozzleGAS and OIL FILL-UP To Stop EngineTo Start Engine To Remove Blower Chute Using the Nozzle VacuumWhen temperature is below 32 degrees F To Empty BAGNozzle Height Adjustment Using the Hose Assembly Lubrication Clean Equipment General Recommendations Check Engine OILClean Engine Service AIR CleanerService Spark Plug Service MufflerRemoving the Flail Screen Carburetor AdjustmentService and Adjustments Engine SpeedSharpening or Replacing Chipper Blade Disconnect and ground the spark plug wireStorage Yard VacuumEngine OtherProblem Possible Causes Corrective Action TroubleshootingParts List Part Description Part DescriptionSears Craftsman 6.0 H.P. Yard Vacuum Model Polo Green Oyster Grey Powder Black 12H800 Choke System 968 425 425A 968B 966A 159 972 972A 957 930 1040 1059 972D 930C Emission Label 332 356 333 493365 493260399269 493279691092 499429499425 20AK272199 499423691997 497465134 D398188 117 494870125 498170 133 398187209 691864 209B 691851209A 690567 222 692031 217 690354276 Dz271716 305 691108455 695161 445A 491588601 95162 689 691855923 691994 Switch801 690782 870 6903801036 695111 970 6916691019 494256 1059 692311Garantia ContenidoSeguridad Operacion EN GeneralServicio NiñosInstalacion DEL Manillar DesembalajePiezas Sueltas Desconexion DE LA BujiaTuercas de ChavetaPasador Tolva de SopladorEtiqueta Barra Delantera Cierre de Recolector Controles DE OperacionTubo de astillado BoquillaPara Apagar EL Motor GasolinaCuando la temperatura esta por debajo de 32F 0C Para Arrancar EL MotorDescarga de la bolsa Cuando la temperatura es sobre 32F 0CAjuste de la altura del pico Extracción del canal de sopladoUso del pico de la aspiradora Uso del montaje de la mangueraCambio DE Aceite DEL Motor LubricacionLimpieza DEL Equipo Revision DEL Aceite DEL MotorServicio DEL Silenciador Para Vaciar EL AceiteServicio DEL Filtro DE Aire Servicio DE LA BujiaServicio Y Ajustes Ajuste DEL CarburadorVelocidad DEL Motor Retiro DE LA Rejilla DE FlagelosAstilladora CarcasaSuperior CuchillaAlmacenamiento Aspiradora para jardinesMotor OtrosLocalizacion DE Averias Problema Causas posibles Solución
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