NOTE:
Needle to hook clearance and race cover spring clearance
seldom change or need adjustment.
Needle bar height may change due to jamming the machine or
breaking a needle and should be checked if stitches are skipped or
thread breaks.
NEEDLE TO HOOK CLEARANCE
1. Remove: Lower feed roller plate (Model 126) or shuttle access
plate (Model 155), pan, bobbin, and race cover.
2. Clean the shuttle area, hook and race cover prior to adjusting.
TO CHECK:
Install new needle backwards with the scarf to the outside (left)
rather than inside (right) (See Figure 4).
Hold machine at an angle so that the hook stays in place and the
shuttle area is visible. Turn handwheel counter-clockwise until the
point of the hook passes behind the needle. Stop when the point is
approximately 1/8" past the needle (See Figure 1). The hook should
just touch, but not deflect the needle (See Figure 2). This setting
should be made in the zig zag position and the needle checked so it
does not deflect on either the inside or outside stitch.
If adjustment is necessary, loosen Screw ‘A,’ (part# 126-137) on
shuttle drive clamp (part#126-139) and move shuttle body left or right
as necessary (See Figure 3). Tighten screw ‘A’ slightly. Because
loosening Screw ‘A’ also allows the shuttle assembly to rotate, the
race cover spring clearance should also be checked. (Next step
page 20)
Page 19
ADJUSTMENTS
Needle
TOP OF HOOK
Needle as Viewed
from Front
INCORRECT CORRECT
EYE
Figure 2
Figure 1
Figure 4
Figure 3
