Singer 2802 Service Manual page 58

Service Manual
Disc and Disc Follower Clearance
The disc follower should be adjusted so that 0,2 - 0,3 mm (.007" - .0 ") play is obtained
between its contact point and the top of the disc tooth.
Check:
1. Remove arm top cover.
2. Set the zig-zag lever to its maximum width.
3. Set the pattern selector dial (F) between "A" and "B". In this position the "leg" of the
isolating lever (G) will be placed on the top of the selector dial tooth.
4. There should be then
contact point and the top of the disc tooth.
Adjustment:
1. Set the zig-zag lever to its maximum width.
2. Rotate the hand wheel until you meet the disc follower contact point on top of the disc
tooth.
3. Set the pattern selector dial (F) between "A" and "B". In this position the "leg"of disc
follower disengaging lever (G) will be placed on top of the pattern selector dial tooth.
4. Loosen the screw (H).
5. Turn eccentric washer ( I ) so that the frontal point of
touches the arm slide block ( J ).
6. Tighten screw (H).
7. Recheck the play and adjust once again if necessary.
For the cam stack to perform reliably, there should be a minimum of radial play consistent
with uniform operating tone.
Check:
1. Remove arm top cover.
2. Set machine for straight stitch.
3. Rotate the cam stack (C) back and forth. Rotate hand wheel for one complete turn of the
cam stack. Check for rotational play at four equidistant points (each 90º aproximately)
on a full revolution of the cam stack. If there is one point without rotational play in a
complete revolution of the cam stack, no adjustment is needed even though radial play
may exist in other positions.
Adjustment:
1. Loosen the three cam stack mounting plate screws (D).
2. Move cam stack gear assembly (E) toward the worm gear of the arm shaft to eliminate
rotational play and away from the worm gear of arm shaft to eliminate binding.
3. Tighten the three mounting screws (D).
4. Recheck for rotational play and readjust if necessary.
Rev. n .
o
Except 2802/2852
a 0,2 - 0,3 mm. (.007" - .011") play between the disc follower
. .
Cam Stack Radial Play
Except 2802/2852
disc follower disengaging lever
57
11
(G)
358487-001 Mar./2005