SINGER W1066 (older model) - Manual (Page 18)

If Machines
Binds
BOBBIN
CASE
CLAMPS
BOBBIN
RAC:
LATCH
2 — Turn clamps outward and remove race cover.
3— Remove hook. . • i j
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. 1 , 1 j
7 _Grasp threaded bobbin case by latch and re­
place, fitting tongue into notch of race cover.