SETTING
THE
CLEARANCE
BETWEEN
NEEDLE
AND
HOOK
POINT (Continued)
To move hook point toward or away
from
needle,
loosen the two bevel gear screws shown in Fig. 47
and loosen bushing set screw shown in Fig. 48.
MAKE
CERTAIN
THAT
BEVEL
GEARS
ARE
KEPT
IN MESH
CONSTANTLY
UNTIL
THEIR
SCREWS
ARE
SECURELY
RETIGHTENED.
Using a light mallet and a
1/4
inch
brass
drift pin,
move
hook assembly toward or away
from
needle as
required.
Figs.
48 and 49 show correct placement of
drift pin. TAP
VERY
LIGHTLY
to avoid
damaging
hook
assembly.
Securely tighten bushing
set
screw.
Remove all end play
from
hook shaft by moving
hook assembly firmly against front hook shaft bushing
and, at the same time,
moving
hook shaft
*bevei
gear
toward
sewing
hook end of
shaft.
DO
MOT
DAMAGE
LOOSEN
BUSHING
SET
SCREW
^\JJ
1/4"
BRASS
DRIFT
PIN
TAP
VERY
LIGHTLY
TOWARD
NEEDLE.
Fig.
48.
Position
of
Drift
Pin
when
Moving Hook
Toward
Needle
^SETTING
THE
POSITION
FINGER
Clearance between position finger and bobbin
case
holder should be just sufficient to allow thread to
pass
through
easily.
Normally an .018 to .022 inch
clear
ance,
as
shown in Fig. 50, is required. If
necessary,
bend position finger CAREFULLY to
achieve
this
setting.
Top
surface
of the position finger must be kept
level with the top
surface
of the bobbin
case
holder.
HOOK
SHAFT
BEVEL
GEAR^
ALWAYS
KEEP
GEARS
IN
MESH-
BEVEL
GEAR
SCREWS
-1
-2
Fig, 47. Bevel Geor
Screws
Tighten screw 1, Fig. 47 on bevel gear. Securely
tighten
bevel
gear
screw
2,
Fig.
47.
Replace all parts previously removed.
Check thread
clearance
between position finger
and
bobbin
case,
as
instructed
next.
TAP
VERY
LIGHTLY
AWAY
r.
FROM
NEEDLE
1/4"
BRASS
DRIFT
PIN
LOOSEN
BUSHING
SET
SCREW
DO
NOT
HIT
BRIDGE
Fig.
49.
Position
of Drift
Pin
when
Moving Hook Away from
Needle
BOBBIN
CASE
HOLDER
POSITION
FINGER
Vf
a)r-^
.018"
TO
.022"
.CLEARANCE
POSITION
FINGER
SCREW
Fig.
M^Position
Finger
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