Murray 309007x8B Inspect Blade, HOW to Remove and Install the Blade, HOW to Sharpen the Blade

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MAINTENANCE

INSPECT BLADE

WARNING: Before you inspect or remove the blade, disconnect the wire to the spark plug. If the blade hits an object, stop the engine. Check the unit for dam- age. The blade has sharp edges. When you hold the blade, use gloves or cloth material to protect your hands.

If you keep the blade sharp and inspect the blade for damage, the blade will cut better and be more safe to operate. Frequently check the blade for excessive wear, cracks, or other damage. Frequently check the nut that holds the blade. Keep the nut tight. If the blade hits an object, stop the engine. Disconnect the wire to the spark plug. See if the blade is bent or damaged. Check the blade adapter for damage. Before you operate the unit, replace damaged parts with original equipment parts. See the authorized service center in your area. Every three years, have an authorized service person inspect the blade or replace the old blade with an original equipment part.

HOW TO REMOVE AND INSTALL THE BLADE

1.Remove the mower housing. See the instructions on “How To Remove The Mower Housing”.

2.Use a piece of wood to keep the blade from rotating.

3.Remove the nut that holds the blade (Figure 15).

Hi−Lift

Edge Up

Mandrel

Blade Adapter

Blade

Belleville Washer

 

Washer

Nut

Figure 15

 

4.

Check the blade and the blade adapter according to the in-

 

structions for “Inspect Blade”. Replace a badly worn or dam-

 

aged blade with an original equipment blade. See an

 

authorized service center in your area.

5.

Clean the top and bottom of the mower housing. Remove all the

9.Tighten the nut that holds the blade to a torque of 35 foot pounds (47,5 N−m).

10.Install the mower housing. See “How To Install The Mower Housing”.

Blade Adapter

 

 

Blade

 

Washer

Belleville Washer

Nut

 

(Outside rim must be

Figure 16

against the blade.)

HOW TO SHARPEN THE BLADE

WARNING: Vibration can be caused if the blade is not correctly balanced or if the blade is damaged. A blade that is damaged with cracks can break and cause an accident.

Keep a sharp edge on the blade. A blade that is not sharp will cause the tips of the grass to become brown.

1.Sharpen the blade two times a year or every 25 hours.

2.Remove the blade according to the instructions in “How To Re- move And Install The Blade”.

3.Clean the blade with a brush, soap and water. Check the blade. Look for cracks, nicks, or other damage. Replace a badly worn or damaged blade with an original equipment blade. See an authorized service center in your area.

4.Sharpen the blade with a file (Figure 17). Make sure you keep the original bevel angle.

5.Make sure the blade is balanced. Use a screwdriver and hold the blade parallel to the ground (Figure 17). A blade that is balanced will stay parallel to the ground. If the blade is not bal- anced, the heavy end will rotate toward the ground. Sharpen the heavy end until the blade is balanced.

6.A new blade will cut better than a badly worn blade. Every three years, have an authorized service person inspect the blade or replace the old blade with an original equipment blade.

7.Assemble the blade according to the instructions “How To Re- move And Install The Blade”.

 

grass and debris.

6.

Mount the blade and blade adapter on the mandrel

 

(Figure 15).

7.

Mount the blade so that the hi−lift edges are up. If the blade

 

is upside down, the blade will not cut correctly and can cause

 

an accident.

8.

Fasten the blade with the original washers and nut. Make sure

 

the outside rim of the Belleville washer is against the blade

 

(Figure 16).

WARNING: Always keep the nut tight that holds the blade. A loose nut or blade can cause an accident.

F−050611L

24

Screwdriver

Blade is balanced

when parallel to the ground.

Ground

Blade

File

Figure 17

Image 24
Contents This Instruction Book Contains Information Product InformationTable of Contents OWNER’S Information Environmental AwarenessII. Slope operation Safe Mowing Guide Safe Mowing Guide Safe Mowing Guide Steps to Follow Before MowingSafety Warning Pictorials International PictorialsInternational Pictorials Control And Operating PictorialsAssembly AssemblyHOW to Install the Seat HOW to Assemble the Steering WheelMaintenance Free Battery HOW to Charge Maintenance Free BatteryHOW to Install the Battery Cables HOW to Prepare the Engine Check the Level of the Mower HousingIMPORTANT! Before YOU Start Mowing Check the TiresOperation Location of ControlsLift Lever Electrical Safety System HOW to Operate the Ignition KEY SwitchAttachments Operator Presence System SeatHOW to USE Throttle / Choke Control HOW to USE Blade Rotation ControlHOW to USE the Shift Lever See the Instruction Book for the AttachmentHOW to SET the Parking Brake HOW to Change the Cutting HeightHOW to Stop the Unit HOW to Transport the UnitHOW to Install the Side Discharge Attachment Secure the side discharge attachment with the fastenersHOW to Start the Engine Before Starting the EngineCarburetor HOW to Operate with the Mower Housing HOW to Operate the Unit on HillsOperating Tips Mowing and Bagging TipsMaintenance Frequency Maintenance Required CommentsHOW to Check the Muffler General RecommendationsHOW to Remove and Install the Blade HOW to Sharpen the BladeInspect Blade HOW to Check the Blade Rotation Control HOW to Check and Adjust the Drive Brake HOW to Check and Adjust the ClutchHOW to Adjust the Shift Lever Connect the adjuster nut to the shifter yokeWhere to Lubricate HOW to Check the Fuel FilterHOW to Level the Mower Housing HOW to Remove the Mower Housing HOW to Install the Mower HousingHOW to Replace the Motion Drive Belt RemovalHOW to Replace the Mower Drive Belt HOW to Install the Wheels Front WheelHOW to Replace the Fuse HOW to Clean the Mower HousingBattery Clean the UnitTrouble Shooting Chart MURRAY, INC. Lawn Mower Central Parts Distributors −050611L Repair Parts Chassis & Hood Repair Parts Chassis & HoodKey Description Motion Drive Motion Drive Steering Steering Mower Housing Suspension Repair Parts Mower Housing 7601035 Complete Mower Deck Assy Wiring Harness for 30 MID−ENGINE Rider 2004 Main Harness Electrical SystemRepair Parts −050611L Index MID-ENGINE Rider Accessories