F. DRIVE BELT ADJUSTMENT. 4-speed
D. TIMING BELT ADJUSTMENT (Fig. 13). The
machines: There are two different V-belt drives on
timing belt should be adjusted tight or snug, but
the 4-speed machine. The primary drive belt goes
not tensioned as one may do with V-belts. If the
from the motor to a countershaft pulley, and the
belt "sings" it indicates too much tension. If the
final drive belts go from the countershaft pulley to
belt is run too loose it may jump cogs. Therefore,
the ring gear pinion shaft pulley. To adjust the final
when performing this adjustment, the mid-span
drive belts, turn the screw shown in Fig. 15. These
point of the belt, when moved with the fingers,
belts should be reasonably tight, so that there is
should have a small but definite up and down
only l/4" of movement when the belt is pushed
movement. Loosen the timing belt adjustment bolt
with the fingers midway between the pulleys.
and rotate the cam sleeve until the desired position
is reached. Then hold the cam in position while
To adjust the primary drive belt, loosen the cap
retightening the bolt.
screw in the motor mount bracket (Fig. 15) and
swing the motor up until the belt is tensioned. This
E. MOTOR SWITCH ADJUSTMENT. Switch
belt will not require much tension to drive the
adjustment can be made by means of the set screw
machine satisfactorily. With the belt tensioned
in the end of the pin which the switch rod passes
properly, retighten the cap screw to clamp the
through (Fig. 14). Loosen the set screw and adjust
motor mount bracket securely to the support bar.
the switch rod longer or shorter as required so that
the cutting head, when lowered, will turn the switch
G. BLADE GUIDE ADJUSTMENT. For
off just before it comes to rest on the stop. The
satisfactory cutting results, it is necessary to
switch should not be turned off so soon that the
maintain the blade guides in good repair and proper
cutting head rests on the switch rather than on the
adjustment. This is probably the most important
stop.
adjustment on the machine, and must be done
carefully and thoroughly. It is very important that
a new blade be installed on the machine before
making any blade guide adjustments. Because this
adjustment is so important, a separate manual has
been prepared and is included with the original
machine manuals.
H. BLADE BRUSH ADJUSTMENT. The blade
brush should engage the blade lightly, usually just
enough to turn it. The blade brush should not
engage the blade beyond the depth of the teeth. To
make this adjustment, slightly loosen the wingnut
and turn the thumb screw to engage the brush
against the blade (Fig. 16). Retighten the wingnut.
Do not make this adjustment with the machine
running for safety reasons.
I. BLADE TENSION INDICATOR AC-
CESSORY. When the blade has been installed in
accordance with this manual, tighten the blade
Figure 14
until the marks on the indicator line up (Fig. 17).
Figure 15
Figure 16
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