Troy-Bilt 494 Chipper User Manual


 
11
Figure 8
Chipper Blades
Disconnect the spark plug wire and ground against
the engine.
Remove the flail screen as instructed in the
previous section.
Remove the chipper chute by removing three hex
nuts and washers.
Remove the chipper chute support brace from the
frame by removing the hex bolts.
Rotate the impeller assembly by hand until you
locate one of the two chipper blades in the chipper
chute opening.
Remove the blade using a 3/16 allen wrench on
the outside of the blade and an adjustable wrench
on the impeller assembly. See Figure 9.
Figure 9
Rotate the impeller to expose other blade and
remove in the same manner.
Replace or sharpen blades.
When sharpening the blade, protect hands by using
gloves and follow the original angle of grind. Also,
make sure to remove an equal amount from each
blade and torque to 250 - 300 in. lbs.
NOTE: Make certain blades are reassembled with the
sharp edge facing upward.
Shredder Blade
Disconnect the spark plug wire and ground against
the engine.
Lower the hopper assembly and block up the
housing.
Remove the six hex lock nuts and flat washers from
the weld studs on the flail housing.
Separate the hopper assembly from the impeller
assembly and remove the support plate.
NOTE: When reassembling the support plate, the
embossed tab must face inward towards the impeller.
Remove the two wing knobs and cupped washers
that secure the discharge chute and raise the
chute.
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.
Remove the two outside screws on the blade, using
a 3/16 allen wrench and a 1/2 wrench.
See Figure 10.
Remove the blade by removing the center bolt, lock
washer, and flat washer.
NOTE: Use caution when removing the blade to avoid
contacting the weld studs on the housing.
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.
Figure 10
Discharge
Chute
Hairpin
Clips
Wing Knobs
Flat Screw
Blade
Discharge Chute
Blade
Flat Screw
Hex Bolt
Weld Stud