Remove flange lock nut that secures flail screen to the lower housing. The flail screen does not have to be removed.

Remove the hex bolt, lock washer, and flat washer that secure the impeller assembly to the crankshaft. See Figure 13.

Upper

Housing

Chipper

Blade

Impeller

Assembly

Hex Bolt

Lock Washer

Flat Washer

Flail

Blade

BOTTOM VIEW

Figure 13

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 blade using a 3/16” allen wrench on the outside of the blade and 1/2” wrench on the impeller assembly.

Replace or sharpen chipper blade. The blade can be sharpened with a file or on a grinding wheel.

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

Reassemble by performing the previous steps in the opposite order and manner of removal.

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 14.

Flail

Chipper Blade

 

 

Impeller

 

Assembly

Figure 14

Storing Your Chipper Shredder Vacuum

Clean the equipment thoroughly.

Wipe equipment with a oiled rag to prevent rust.

Refer to engine manual for correct engine storage instructions.

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

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MTD 020 manual Storing Your Chipper Shredder Vacuum