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Model W1878 (For Machines Mfd. Since 4/21)
3. With blade on and properly tensioned, hold a
straightedge close to center of both wheels. Make
sure straightedge fully extends across the rims of
both wheels, as shown in Figure.48.
4.. Check wheel alignment, and adjust tracking knob
to bring both wheels into alignment as much as
possible. If wheels cannot be adjusted coplanar,
use Figure.47 to determine how to proceed with
alignment adjustments.
Shimming.a.Wheel
A wheel that is parallel with the other wheel, but is not
coplanar, must be shimmed by the distance that it is not
in the same plane with the other wheel.
Tip:.Standard washers work well for shimming the wheel
because they can easily be stacked to get the desired
height.
To.shim.a.wheel,.do.these.steps:
1. DISCONNECT MACHINE FROM POWER!
2. Adjust upper wheel tracking so that it is parallel
with lower wheel.
3. With straightedge touching both rims of wheel that
does not need to be adjusted, measure the distance
away from the other wheel with a fine ruler, as
shown in Figure.49. The distance measured with the
ruler is the distance this wheel must be shimmed.
4. Remove blade.
5. Remove wheel to be shimmed. Place as many shims
as necessary to correct gap measured in Step.3 onto
wheel shaft.
6. Re-install wheel and secure it in place.
7. Re-install blade and properly tension it.
Figure.48. Example of checking if the
wheels are coplanar.
8. Perform previous Checking.Wheel.
Alignment procedure. If necessary to
make the wheels parallel, repeat this
procedure.
9.
The first time you get the wheels
coplanar, place a mark on each wheel
where you held the straightedge, then
use this position again in the future if
you need to repeat the procedure. This
assures repeated accuracy every time
you adjust the wheels.
10. Close wheel covers.
Figure.49. Example of measuring the
distance to shim the wheel to be coplanar.
-45-
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