MTD Shredder 642D thru 648D - Manual (Page 10)

Allen
Screws
When reassembling the blade, tighten to between 550
and 650 inch pounds, or lacking torque wrench, tight­
en securely.
FLAILS
The flails, located inside the housing, may be
reversed when they become dull. It is suggested that
this procedure be performed by your nearest author­
ized dealer.
CARBURETOR ADJUSTMENT
A
Torque
Wrench
WARNING: If any adjustments are made
to the engine while the engine is running
(e.g. carburetor), keep clear of all moving
parts. Be carefui of heated surfaces and
muffler.
FIGURE 12.
5. Loosen the two hand knobs and cupped washers
which secure the chute deflector, and raise the
chute deflector.
6. Insert a 1/2" or 3/4" diameter pipe throuc h the flail
screen into the impeller assembly to kei >p it from
turning, or remove the flail screen, anc insert a
piece of wood (2 x 4) into the chute oper ing.
7. Remove the two outside screws on tt e blade,
using a 3/16" alien wrench and a 1/2" wr inch.
8. Remove the blade by removing the center bolt,
lock washer and flat washer.
NOTE: Use caution when removing the blad ? to avoid
contacting the weld bolts on the housing.
When sharpening the blade, follow the origi
of grind as a guide. It is extremely important
cutting edge receives an equal amount of g
prevent an unbalanced blade. An unbalam
will cause excessive vibration when rotatir
speeds and may cause damage to the unit.
The blade can be tested for balance by be
on a round shaft screwdriver or nail. Rem(
from the heavy side until it is balanced ev
figure 13.
nal angle
that each
rinding to
ed blade
g at high
lancing it
ive metal
inly. See
Minor carburetor adjustment may be required to com­
pensate for differences in fuel, temperature, altitude
or load.
NOTE: A dirty air cleaner will cause engine to run
rough. Be certain air cleaner is clean and attached to
the carburetor before adjusting carburetor.
Do not make unnecessary adjustments. Factory set­
tings are satisfactory for most applications and condi­
tions. If adjustment is needed, refer to the separate
engine manual packed with your shredder.
OFF-SEASON STORAGE
The following steps should be taken to prepare your
shredder for storage.
1. Clean and lubricate the shredder thoroughly.
2. Refer to engine manual for correct engine storage
instructions.
3. If storing in an unventilated or metal storage
shed, coat metal parts with a light oil or silicone to
prevent rust.
4. Store in a dry, clean area. Do not store next to
corrosive materials, such as fertilizer.
10