Adjusting Return Spring Tension - Grizzly T33901 Owner's Manual

Adjusting Return
Spring Tension
The spring tension for automatic quill recoil has
been pre-set at the factory. In most cases, it will
never need to be re-adjusted during the life of the
machine. However, if the quill stops automatically
recoiling, the spring may need to be adjusted for
additional tension. If it does need adjustment, the
spring housing is located on the left side of the
headstock (see Figure 49).
Spring
Cover
Jam Nut &
Cover Nut
Spring Cover Notch
& Locking Screw
Figure 49. Spring adjustment components.
If return spring should come
loose from spring cover and
rapidly unwind, laceration
or impact injuries could
occur. Always wear heavy
leather gloves and safety
glasses when adjusting
return spring tension.
Items Needed
Heavy Leather Gloves ..................................1 Pr.
Safety Glasses .............................................1 Pr.
Shop Rags ......................................... As Needed
Open-End Wrenches 19mm .............................. 2
To adjust spring tension:
DISCONNECT MACHINE FROM POWER!
1.
-38-
Wipe any oil off spring cover so it does not slip
2.
in your fingers in following steps (see Figure
49).
Hold spring cover against side of headstock
3.
so cover stays splined with locking screw, then
loosen jam nut and cover nut approximately
⁄ " each (see Figure 49).
1
4
IMPORTANT: Hold spring cover tightly dur-
ing Step 4, or force of spring will cause cover
to spin out of your hands.
Wearing gloves, pull spring cover outward
4.
just enough to disengage spring cover notch
from locking screw (see Figure 49).
Rotate cover counterclockwise to increase
5.
tension, or clockwise to reduce spring tension.
Engage next available spring cover notch
6.
with locking screw (see Figure 50) and hold
spring cover tightly to side of headstock.
Figure 50. Location of spring cover notches and
Tighten cover nut against spring cover just
7.
until nut stops, then back off nut approximately
⁄ turn.
1
3
Qty
Hold cover nut and tighten jam nut against
8.
cover nut.
Check tension adjustment by downfeeding
9.
spindle. Spindle should return quickly when
downward pressure is released.
— If spindle does not retract quickly, repeat
Steps 3–8, and re-check tension until
return speed is adequate.
Model T33901/T33902 (Mfd. Since 07/23)
Spring Cover
Locking
Screw
locking screw.
Notches
(2 of 6)