MTD 462 thru 464 Maintaining Your Chipper Shredder, Sharpening Or Replacing The Shredder Blade

6.Remove the blade by removing the internal hex screws, lock washers, and hex nuts which secure it to the impeller. Retain the hardware. See Figure 13.

NOTE: Use a 3/16” hex key (Allen) wrench on the outside of the blade and a 1/2” box (or socket) wrench on the inside of the impeller. Hold the Allen wrench stationary and rotate the box (or socket) wrench to loosen the nut.

7.Install a replacement blade (Part No. 781-0490) with the hardware removed earlier or sharpen.

IMPORTANT: When sharpening the blade, protect hands by using gloves. Follow the original angle of grind and make sure to remove an equal amount from each blade.

8.To replace the other blade, rotate the impeller to expose the second blade and repeat the steps above.

NOTE: Make certain blades are reassembled with the sharp edge facing upward. Torque hardware to 250 - 300 in. lbs.

Sharpening Or Replacing The Shredder Blade

WARNING: The impeller’s chipper blades are sharp. Wear leather work gloves to protect your hands.

1.Stop the engine and make certain that all moving parts have come to a complete stop.

2.Disconnect the spark plug wire and ground against the engine.

3.Lower the hopper assembly and block up the housing.

4.Remove the six hex lock nuts and flat washers from the weld studs on the flail housing. Retain the hardware.

5.Carefully separate the hopper assembly from the impeller assembly and remove the support plate.

NOTE: When reassembling the support plate, make certain the embossed tab faces inward towards the impeller.

6.Remove the two wing knobs and cupped washers that secure the chute deflector and raise the chute.

7.Insert a 1/2” or 3/4” diameter pipe through the flail screen into the impeller to keep it from turning or remove the flail screen and insert a piece of wood into the chute opening.

8.a. Remove the two internal hex screws, lock washers, and hex lock nuts which secure the shredder blade to the impeller.

b.Remove the hex bolt, lock washer, and flat washer to completely free shredder blade. See Figure 14.

Figure 13

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Figure 14

NOTE: Use a 3/16” hex key (Allen) wrench on the outside of the shredder blade and a 1/2” box (or socket) wrench on the inside of the shredder blade. Hold the Allen wrench stationary and rotate the box (or socket) wrench to loosen the nut. Use caution when removing the blade to avoid contacting the weld studs on housing.

IMPORTANT: When sharpening the blade, follow the original angle of grind as a guide. It is extremely important that each cutting edge receives an equal amount of grinding to prevent an unbalanced blade. An unbalanced blade will cause excessive vibration when rotating at high speeds and may cause damage to the unit. The blade can be tested by balancing it on a screwdriver or nail. Remove metal from the heavy side until it is balanced evenly.

Storing Your Chipper Shredder

The following steps should be taken to prepare your chipper shredder for storage.

1.Clean the equipment thoroughly.

2.Wipe equipment with an oiled rag to prevent rust.

3.Refer to engine manual for correct engine storage instructions.

4.Store unit in a clean, dry area. Do not store next to corrosive materials such as fertilizer.

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Maintaining

Your Chipper

Shredder

WARNING

The impeller’s chipper blades and shredder blade are sharp. Wear leather work gloves to protect your hands.

IMPORTANT

Make certain chipper blades are reassem- bled with the sharp edge facing upward. Torque hardware to 250 - 300 in. lbs.

IMPORTANT

When reassembling the shredder blade, tighten center bolt to between

550and 700 in.-lbs. and the two out bolts to between 250 and 350 in.-lbs.

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