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Pipe
Weld Bolt
Allen
Screw
When reassembling the blade, tighten center
bolttobetween 550-700 inch-pounds and the
two outer boltsto 250-300 inch-pounds, or
lacking torque wrench, tighten securely.
1. Insertscrew driver through hole
"-,,.p
2. Bladeshould be parallel to ground
Sc
D:d_e_ Blade
I I-
Ground
Torque Wrench
Figure 20
• Remove the six hex lock nuts and lock washers
from the housingweld boltsusing a 112"wrench.
Separate the chipper-shredder intotwo halves.
• Remove the back-up plate,
NOTE: When reassembling, make certain the
embossed tab faces inward towards the impeller, and
opening on theback-up plate is toward the bottom of
the unit.
• Remove the two hand knobsand cupped
washers which secure the chute deflector. Raise
the chute deflector,
• Insert a 112"or 314"diameter pipe through the
flail screen intothe impeller to keep itfrom
turning,or remove the flailscreen and inserta
piece ofwood (2 x 4) intothe chute opening.
• Remove the two outside screws on the blade,
using a 3116"allen wrench and a 1/2" wrench,
• Remove the blade by removing the center bolt,
lock washer and flat washer.
WARNING: Use caution when removing
the blade toavoid contacting the weld bolts
on the housing.
When sharpening the blade, follow the odginal
angle of grindas a guide. It isextremely
importantthat each cutting edge receives an
equal amount ofgrinding to prevent an
unbalanced blade.
An unbalanced blade will cause excessive
vibration when rotatingat high speeds and may
cause damage tothe unit.The blade canbe tested
for balanceby balancingiton a roundshaft
screwdriverornail. Remove metal from the heavy
side untilitisbalanced evenly. See Figure21.
Figure 21
Adjusting Carburetor
WARNING: If anyadjustmentsare made to
the engine whiletheengine isrunning(e.g.
carburetor),keep clear of all moving parts.
Becarefulofheated surfaces and muffler.
Differences in fuel,temperature, altitude or load may
require minor adjustments to the carburetor. This
carburetor isequipped with an idle mixturevalve with
a limiter and an idle speed adjustment screw.
• Start engine and let it runfor about 5 minutes.
• Rotate carburetor throttle lever against the idle
speed screw and hold it.Turn idlespeed screw
to obtain 1750 rpm. See Figure 22.
Carburetor Idle Speed Screw
Thro_ Lever
@
Figure 22
Rotate idle mixturevalve fulltravel clockwise
and then counter-clockwise. Finally position idle
mixture valve in middle oftreveL See Figure 22.
16