Singer class 251 - Hook Assembly Movement; Moving Hook Assembly Away from Needle; Moving Hook Assembly Toward Needle; Feed Eccentric Stop Screws

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
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DO NOT
HITBRIDG~
► 'f
~
TAP VERY
LIGHTLY
;
¼" BRASS DRIFT PIN
Fig. 39. Moving Hook Assembly away from Needle
DO NOT DAMAGE
Z3
'
oc__
/ ◄
BRASS DRIFT PIN
Fig. 40. Moving Hook Assembly toward Needle
G
TAP 1
LIGHTLY
When the point of the hook has been correctly set in relation to
the needle, securely tighten the hook shaft bushing set screw Z3,
Fig. 40.
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Make certain set screw #1, Fig. 37 (the first of two bevel gear set
screws to appear as the machine pulley is turned over toward operator)
seats over flat on hook shaft. Remove all end shake from hook shaft, by
pushing hook firmly against front hook shaft bushing and, at the same
time, pushing gear S4, Fig. 37 toward the hook on the shaft. Securely
tighten first set screw #1, Fig. 37, page 27, then tighten set screw #2.
Time the sewing hook, as instructed on pages 22 and 33.
Replace the bobbin and bobbin case, as instructed on page 13.
FEED ECCENTRIC STOP SCREWS
The machine is prevented from making longer stitches than a pre-
determined maximum by the stop screw W, Fig. 41 in the feed
eccentric.
Feed eccentric stop screw 140256, furnished with Machine 251-1,
permits a maximum length of seven stitches per inch. Stop screw
140258, for 14 stitches per inch or shorter, can also be used. Machines
251-2 and 251-3 are regularly fitted with stop screw 140257 permitting
a maximum length of 5-1 /2 stitches per inch, but either 140256
(7 stitches per inch) or 140258 (14 stitches per inch) can be used.
Fig. 41. Feed Eccentric Stop Screw