Centralizing Left-Center-Right Needle Position - Singer 5400 Series Service Manual

Service Manual

Centralizing left-center-right needle position

The left and right zig-zag needle penetrations, at maximum width, must coincide with the left and right
needle position when the machine is set for straight stitching.
Check:
1-
Set the machine for zig-zag, maximum width.
2- With the presser foot in a raised position, hold a piece of paper in place over the needle plate so
needle penetrations may be observed.
3- Make left and right zig-zag needle penetrations in the paper.
4- Without disturbing the position of the paper move the stitch width lever to straight stitch, move the
needle position lever to left needle position and rotate the hand wheel toward the front of the
machine to bring the tip of the needle over the left zig-zag needle penetration in the paper.
5- Repeat for the right needle position.
6- The needle should enter the zig-zag needle penetrations precisely.
Adjustment:
1-
Remove the free arm extension table, tension assembly dial, the knobs of the zig-zag and needle
position levers, all covers (face plate, rear, bottom bed and front) and presser foot.
2- Set stitch width lever at maximum zig-zag.
3- While holding a piece of paper over the needle plate, rotate the hand wheel until left and right
needle penetrations are made in the paper.
4- Without disturbing the location of the paper move stitch width lever to straight stitch and needle
position lever to left needle position.
5- Rotate hand wheel to bring the point of the needle above the left penetrations in the paper.
6- Loosen screw (A).
7- Move slide block bracket (B) to right or left until the needle coincides with the needle penetration.
8- Without disturbing the position of bracket (B) tighten screw (A).
9- Recheck and adjust if necessary.
Rev. n .
o
MAY/00
71
P/N 357773-002