Specifications

UTC Adjustments
It is very important that you follow these instructions any time the rotary hook or
UTC is loosened or moved.
Please follow the instructions in the order they occur.
Note: The procedures in this section require the following special tools:
1) a small straight blade screw driver with a thin blade, and
2) the Melco UTC combination gauge part number 009027-01. (This tool
is located in the Melco tool kit that came with the machine.)
Rotary Hook Retaining Finger Positioning
1. Attach the UTC assembly as described earlier in this procedure.
2. With the machine ON and ready for operation, press to switch to the
Service/Maintenance Menu. Then press at the peripheral keyboard until
the LCD displays HEAD TIMING MENU.
3. Press and the LCD displays HEAD TIMING ON.
4. Press keys. The head rotates to the ‘‘Head Up’’ position and the LCD
displays GO TO HEADUP 110.0.
5. Hold down and press (the display will read NEEDLE DEPTH).
6. Slightly loosen the 2 UTC assembly mounting screws from under the needle plate
support bracket.
7. Place the finger of the UTC combination gauge (see Figure 4-27 for diagram of
the gauge) between the retaining finger tab and the rotary hook inner basket
notch (see Figure 4-26).
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 26
Rotary Hook Retaining Finger Positioning 4 - 31
110279-01, Rev B 4. Trimmer Maintenance