MTD 315B - Manual (Page 10)

6. Remove the other blade in the same manner.
Replace or sharpen blades. If sharpening, make
certain to remove an equal amount from each
blade. Reassemble in reverse order.
NOTE: Make certain blades are reassembled with the
sharp edge facing upward, as viewed from the access
plate opening.
CHANGING THE FRICTION WHEEL RUBBER
The rubber on the friction wheel is subject to wear
and should be checked after 50 hours of operation,
and periodically thereafter. Replace friction wheel
rubber if any signs of wear or cracking are found.
1. Drain the gasoline and oil from the chipper-
vacuum.
2. Tip the unit backward so it rests on the handles.
3. Remove the frame cover by removing eight self­
tapping screws from underneath the chipper-
vacuum. See figure 17.
4. Remove the gear shaft from the unit by removing
the hex bolts, lock washers and flat washers from
each side of the frame. See figure 18. Hold the
friction wheel assembly, and slide the gear shaft
out of the unit toward the right side.
5. Remove the six screws from the friction wheel
assembly (three from each side). Remove the
friction wheel rubber from between the friction
wheel plate.
6. Reassemble new friction wheel rubber to the fric­
tion wheel assembly, tightening the six screws in
rotation and with equal force.
7. Slide the friction wheel assembly up onto the shift
mechanism, then slide the gear shaft back into
the unit. Reassemble in reverse order.
8. Readjust the clutch cable. Refer to adjustment
section.
BELT REMOVAL AND REPLACEMENT
A
WARNING: Disconnect the spark plug
wire and move away from the spark plug.
1 . Remove the plastic belt cover on the front of the
engine by removing two self-tapping screws.
Refer to figure 14.
Drain the gasoline and oil from the chipper-
vacuum.
3. Tip the unit backward so that it rests on the
handles.
Remove the frame cover by removing eight self­
tapping screws from underneath the chipper-
vacuum. Refer to figure 17.
Remove the idler pulley bracket as follows. (See
figure 19.)
a. Take the tension off thé belt by pivoting the
idler pulley toward you, and line up the holes in
the idler bracket assembly. Insert a nail or simi­
lar object through the holes to hold the idler
pulley in this position.
b. Remove three self-tapping screws, and lift off
the idler bracket assembly.
2 .
4.
5.
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