Singer 2802 Service Manual page 64

Service Manual
Three rings are cut into the upper end of the needle bar. The distance between the center
and lower ring represents the rise required to form a thread loop at the eye of the needle
required for hook point seizure.
Check:
1. Remove face plate, presser foot, needle, needle plate and bobbin
case.
2. Insert a size 18 needle in the needle bar.
3. Set machine for straight stitch, center needle position.
4. Turn the hand wheel toward the front of the machine to bring the needle bar to its
lowest position.
5. Observe the position of the center timing mark (A) with relation to the bottom face of
the upper needle bushing.
6. Turn the hand wheel toward the front of the machine to bring the lower timing mark (B)
to the same relative position as previously occupied by the center needle bar timing
mark (A). In this position the point of the hook (D) should be within the width of the
blade of the needle. Adjust hook timing, if necessary, to satisfy this requirement. (See
pages 82-83)
7. Select zigzag, maximum width. Turn the hand wheel toward the front of the machine to
move the hook point to the rear of the needle when the needle is in the left zigzag
position. The top of the needle eye (E) should be 0,40 mm - 0,80 mm (1/64" - 1/32")
below the underside of the hook point.
Adjustment:
1. Loosen needle bar clamping screw (F) and raise or lower the needle bar to suit the left
needle position requirements.
2. Tighten screw (F) to pinch tightness.
3. Needle clamp hub (C) should be parallel with the front edge of the needle plate.
4. Securely tighten screw (F). Adjust the automatic needle threader bight stop in order not
allow it touches the guide arm of threader shaft.
Rev. n .
o
Needle Bar Height
63
358487-001 Mar./2005