Brother BAS-761 Service Manual download pdf (Page 45)

5. ADJUSTMENT

BAS-7610

5-05

5-2.

Adjusting the needle bar height and, the needle and the rotary hook timing

Remove the slide plate (the needle plate), the bottom plunger and the work clamp while making this adjustment.

Turn the pulley to set the needle bar (1) to its lowest position. Put the side “1” of the gauge (2) at the end edge of the

needle bar (1). Adjust → Remove the rubber cap (3), Loose the screw (4)

This adjustment is performed in order to prevent the damage to inner rotary hook with a needle. (The rotary hook life is

influenced.)

Perform this adjustment, when needle is exchanged. (Since special rotary hook is used, be sure to use the exclusive

needle.)

Remove the bobbin case holder position bracket while making this adjustment.

Inner rotary hook is rotated so that the needle receptacle part may turn down.

<Timing of the needle and the rotary hook> of the following clause is performed.

The needle receptacle part is returned upwards.

Turn the machine pulley to move the needle bar its lowest position.

It checks that the needle has not hit the needle receptacle part.

When hitting, it reattaches so that the needle may meet the needle receptacle.

1316S

(1)

(2)

(1)

(3)

(4)

1317S

1676S

1677S

1678S

Needle receptacle part

Needle

Needle receptacle part

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Brother BAS-761 Service Manual Page 45