Specifications

5. Place the finger of the UTC combination gauge (see Figure 2-43 for diagram of
the gauge) between the retaining finger tab and the rotary hook inner basket
notch (see Figure 2-42).
6. Position the UTC assembly until the gap between the retaining finger tab and the
rotary hook inner basket notch is set to the thickness of the gauge finger. The
gap is 0.020 inches as shown in Figure 2-42).
7. Additionally, align the center of the retaining finger tab to the center of the
needle as indicated in Figure 2-42.
8. Tighten the UTC assembly mounting screws.
9. Place the UTC Combination Gauge on top of the needle plate support bracket as
shown in Figure 2-43 and check that the UTC detection arm does not touch the
bottom surface of the gauge which represents the bottom of the needle plate
when it is installed.
10. If the arm touches the gauge, carefully reshape the arm slightly until it clears.
0.020"
rotary hook
assembly
retaining
finger tab
inner basket
notch
UTC
Assembly
TOP VIEW of UNDER
THE NEEDLE PLATE
centerline
of tab and
needle
C
L
place gauge finger here
to obtain proper gap
needle
gauge finger
Figure 2 - 42
UTC detection arm
UTC COMBINATION GAUGE
(p/n# 009027-01)
bottom of gauge
gauge finger
UTC detection arm
must clear the bottom
of the needle plate
(represented by the
bottom of the gauge)
UTC Assembly
Figure 2 - 43
Under Thread Control (UTC) Adjustments 2 - 49
110305-01, Rev A 2. Service Adjustments