Adjustment
72
13
.05.04
Hook shaft bearing and spur gear clearance
Rule
1. The front edge of the hook shaft
5
should be
14.5 mm
away from the needle midpoint,
the groove in the hook shaft bearing
1
(see arrow) should be parallel to the bed plate
and point away from the sewing direction.
2. There should be minimal yet noticeable play between the plastic pinion
3
and the steel
wheel
4
. This play should be approximately the same for a
360°
turn.
3. The steel wheel 4 should align with the plastic pinion
3
.
3
Fig. 13 - 05
●
Align the hook shaft bearing
1
(screw
2
) according to
rule 1.
●
Set the steel wheel
4
with the eccentric bush of the hook shaft bearing
1
according to
rule
2
and tighten the screw
2.
●
Adjust the plastic pinion
3
(screws
6
) according to
rule 3
and tighten the screws
6.
4
2
14.5 mm
6
1
Summary of Contents for 3519-5/01
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