SINGER W711 - Manual (Page 25)

TROUBLE CHART
If Machine
Binds
and
and
Thread or lint in
race% ay 1—With take-up lever in highest position, tilt
head back on hinges and remove bobbin case.
BOBBIN
NOTCH RACE
B O B B I N
RACE COVER CLAMPS
2— Turn clamps outward and remove race cover.
3— Remove hook.
4— Clean thread and lint from all parts, includ­
ing race.
5— Run a drop of oil along rim of hook.
6 — Replace hook, then race cover. Snap clamps
into place.
7 — Grasp threaded bobbin case by latch and re­
place, fitting tongue into notch of race cover.