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
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