SINGER 251 - Manual (Page 28)

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TO REMOVE THE SEWING HOOK
143350
S2ZH2
F2
Fig. 45. Removing Sewing Hook Fig. 46. Replacing Oil Filter
Remove the needle, slide plate, throat plate and
bobbin case. Remove the screw D2, Fig. 45 and the
bobbin case holder position bracket E2, Fig. 45. Loosen
the two set screws X, Fig. 45 in the hub of the hook
and turn the machine pulley over toward the oper­
ator until the feed bar C2 is raised to its highest point.
Turn the sewing hook until the thread guard F2, is
at the bottom, as shown in Fig. 46. Turn the bobbin
case holder G2, Fig. 46 until the notch J2 is also near
the bottom, as shown in Figs. 46 and 47. The sewing
hook can then be removed from the hook shaft.
TO REPLACE OIL FILTER 143350
While the sewing hook is off the shaft, it is advis­
able to replace the oil filter 143350, Fig. 46, in the
end of the hook shaft. Unscrew the filter from the
center of the shaft at H2, Fig. 46 and replace with
cl
complete new filter 143350.