MTD 020 User Manual

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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.
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.
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.
Upper
Housing
Impeller
Assembly
Hex Bolt
Lock Washer
Flat Washer
BOTTOM VIEW
Chipper
Blade
Flail
Blade
Flail
Chipper Blade
Impeller
Assembly