SHARPENING OR REPLACING CHIPPER BLADE
Because the engine on this unit has a tapered crankshaft, a special impeller removal tool (part number
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
•Tighten impeller bolt to 375 - 425
NOTE: Make certain chipper blade is reassembled with the sharp edge facing upward. See Figure 20.
Flail | Chipper | |
Blade | ||
Blade | ||
| ||
| Impeller | |
| Assembly |
Figure 20
15