Grizzly G9969 - Manual (Page 34)

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G9969 Radial Drill Press
3. Put on heavy leather gloves and safety
glasses to protect yourself from possible
injury if the spring uncoils during the next
step.
4. While holding the spring lock cover against
the side of the head stock so the cover stays
splined with the locking lug; loosen the jam
nut and cover nut approximately
1 ⁄
4
" (see
Figure 31).
5. Pull the cover outward just enough to
disengage the spring-cover lock slot from the
locking lug.
Note: It is important to keep a good grip
during this step. Letting go of the cover will
cause the spring to rapidly uncoil, which
could cause serious injury!
6. Rotate the cover counterclockwise to increase
spring tension, or let the cover slowly unwind
in the clockwise direction to reduce spring
tension.
7. Engage the next available spring-cover lock
slot with the locking lug and hold the spring
cover tightly against the side of the head
stock.
8. Tighten the lock nut against the spring cover
just until the nut stops, and then back off
the nut approximately
1 ⁄
3
turn, or just enough
so there is no binding at complete spindle
travel.
Figure 31. Loosening cover and jam nut.
A high tension coiled spring is underneath
the cover. Put on heavy leather gloves and
safety glasses to protect yourself from pos-
sible injury when removing the cover.