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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 60).
Spring Cover
Notch
& Locking Lug
Figure 60. Spring adjustment components
(T33960 shown).
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.
-42-
Spring
Cover
Jam Nut
& Cover Nut
Qty
Wipe any oil off spring cover so it does not
2.
slip in your fingers in following steps (see
Figure 60).
Hold spring cover against side of headstock
3.
so cover stays splined with locking lug, then
loosen jam nut and cover nut approximately
⁄
" each (see Figure 60).
1
4
IMPORTANT: Hold spring cover tightly during
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 lug (see Figure 60).
Rotate cover counterclockwise to increase
5.
tension, or clockwise to reduce spring tension.
Engage next available spring cover notch
6.
with locking lug (see Figure 61) and hold
spring cover tightly to side of headstock.
Locking Lug
Spring
Cover
Notches
(2 of 6)
Figure 61. Location of spring cover notches and
locking lug (T33960 shown).
Tighten cover nut against spring cover
7.
just until nut stops, and then back off nut
approximately
⁄
turn.
1
3
Without moving cover nut, tighten jam nut
8.
against 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 T33959/60/61 (Mfd. Since 08/23)
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