Adjustment
14
15
.06.08
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. 15 - 09
O
Align the hook shaft bearing
1
( screw
2
) according to
rule 1
.
O
Set the steel wheel
4
with the eccentric bush of the hook shaft bearing
1
according to
rule
2
and tighten the screw
2
.
O
Adjust the plastic pinion
3
( screws
6
) according to
rule 3
and tighten the screws
6
.
4
2
14.5 mm
6
1