Specifications

4. Position the left edge of the cross roller bearing in line with the left edge of the
retainer plate and the center of the needle bar guide shaft felt pad. (The second
roller of the cross roller bearing should just be engaging between the
embroidery head v-rail and the needle case v-rail.)
5. Slide the retainer plate assembly onto the embroidery head v-rail and cross roller
bearing.
6. Check that the cross roller bearing is centered in the 2 v-rails by the following
method:
a) Center the retainer plate assembly on the embroidery head v-rail.
b) Carefully insert a solid instrument, such as a straight allen wrench, into the
opening at one end where the two v-rails join. Insert the instrument until
it contacts the cross roller bearing. Do not force it any further.
c) Mark the position of the instrument at the end of the embroidery head
v-rail, when the instrument is inserted to where it contacts the cross roller
bearing.
d) Repeat this on the other side of the v-rails and compare the two marks.
They should be very close to the same - within about 3/32 of an inch.
e) Repeat the above procedure for centering the cross roller bearing until the
checking verifies it is within the proper tolerance.
Retainer Plate Bearing Adjustment
Note: This procedure requires the use of a special service tool: the V-Rail Adjustment
fixture (p/n 995675-01).
1. Loosen the two socket head cap screws holding the needle case v-rail to the
retainer plate assembly as indicated in Figure 3-30.
2. Install the retainer plate assembly with the cross roller bearing centered between
the 2 v-rails.
3. Install the v-rail adjustment fixture (p/n 995675-01) into the middle front hole of
the retainer plate assembly as shown in Figure 3-30.
4. Snug the needle case v-rail to the retainer plate assembly very lightly with the
socket head cap screws. Do not overtighten the screws or the fixture will be
unable to perform its adjustment properly.
5. Carefully
and slowly rotate the v-rail adjustment fixture clockwise until you feel a
slight resistance. The left and right retainer plate bearings should now be snug
against the bottom of the embroidery head v-rail.
Retainer Plate Bearing Adjustment 3 - 33
110279-01, Rev B 3. Embroidery Head Maintenance