Specifications
b) The needle case rests solidly and completely on the bearing retainer plate
assembly and is positioned to the right so the right side of the needle
case is against the socket head cap screw in the bearing retainer plate as
shown in Figure 3-33.
4. Align the 4 through holes on the upper section of the needle case with the 4
threaded holes in the bearing retainer plate assembly.
5. Install and tighten the 4 socket head cap screws.
6. Remove the clamping devises from each end of the V-rail and reinstall all covers
that were removed during the procedure.
7. Power up the peripheral and position the needle cases to needle #5.
8. Go into the Head Timing menu and bring needle #5 down slowly, using the
key.
9. Check for the needle centered in the needle plate hole.
10. If a slight recentering is required:
a) Loosen the four needle case screws installed and tightened in steps 4 and 5.
b) Reposition the needle case within the tolerances of the screw holes.
c) Retighten the screws, crossing diagonally during the tightening sequence to
enable even tightening.
Lower Rail Retainer Adjustment
This adjustment affects the forward and backward movement of the bottom of the
needle case. Do not make the adjustment so tight that you preload the roller
bearing in the head so it wears prematurely. Do not have so much free play that the
needle has excessive movement.
1. Install the needle case into the lower rail retainer and attach the needle case to
the retainer plate assembly. Refer to the needle case installation procedure.
2. Loosen the screw under the lower rail retainer and push it towards the rear to
remove the play between the retainer and the lower rail of the needle case (see
Figure 3-34).
Note: If you have the trimmer option, you will have to remove the grabber blade
guide assembly to access the screw.
3. When the gap between the needle case bottom rail and the embroidery head
roller bearing is between zero preload and .002", tighten the screw under the
lower rail retainer.
Lower Rail Retainer Adjustment 3 - 39
110279-01, Rev B 3. Embroidery Head Maintenance