SINGER 95-100 - Manual (Page 6)

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Fig.6. Oiling Points In Base of Machine
At least four times each day apply ONE DROP of oil to the
bobbin case holder bearing In the sewing hook race, as shown In
Fig.7.
Fig.7. Oiling Point In Hook xRace
CAUTION. NEVER OIL THE SEWING HOOK PJ^ l CE THROUGH THE' NEEDLE
HOLE IN THE THROAT PLATE, NOR FLOOD THE HOOK WITH OIL.