16
7. Adjustment of the toothed segment to the bevel gear
Note:
This adjustment is only to be carried out if it is urgently required.
Requirement:
Toothed segment 61 must not strike the gear housing when the sewing hook timing of 2.5 mm
is correctly set (fig. 7).
The hook drive shaft 25 must not exhibit any play.
When the handwheel is turned, the toothed segment must not move out of mesh.
Adjustment:
● Remove the needle and the presser foot holder completely.
● Remove the detachable work support (accessory box) by pulling it to the left.
● Take out the bobbin case and the hook race cover.
● Lay the machine on its back.
● Turn out the five baseplate retaining screws and remove baseplate.
● Turn out both free-arm cover retaining screws.
● Remove free-arm cover.
● Disconnect the spring of gear housing cover.
● Turn out both retaining screws of gear housing cover and remove gear housing cover.
● Loosen screw 24 with a 2.5 mm Allen key.
● Loosen screws 27 with a 2.5 mm Allen key (fig. 7a).
● Move hook drive shaft 25 to the right until teeth are out of mesh.
● Turn hook driver until both driver points 60 are the same distance from the top (fig. 7b).
● Turn hook drive shaft 25 until center of toothed segment 61 is exactly facing bevel gear 23 (fig. 7).
● Push hook drive shaft to the left until toothed segment 61 is resting against bevel gear 23 without
any play.
● Tighten screw 24
Test:
● Check that bevel gears run easily and without play.
Note:
After the sewing hook timing has been adjusted (Point 8 of this manual), check that toothed
segment 61 cannot move out mesh.
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