4
3.1.7 Setting the regulation of the hook lubrication
Oil is wiped from the lubrication wick by the surface of the
hook eccentric and is then supplied by centrifugal force into
the hook path (7). The intensity of oil supply is regulated by
turning the screw (3).
Caution! Danger of injury!
Switch off the main switch ! Before starting the
setting operation, weit until the motor stops!
- To reduce the oil supply, turn the screw (3) to the right.
- To increase the oil supply, turn the screw (3) to the left.
- After the adjustment, loosen the screw (4) and set the height
of the oil tank so as to ensure reliable contact between the
surface of the eccentric and the lubrication wick.
Caution!
The quantity of the fed oil has been set up in the
manufacturing factory. This setting is to be done
only in emergency events. A bad setting of the quantity of the
fed oil or of the height of the lubrifying tube may cause a
rapid wear or a seizure of the hook.
3.1.8 Replacement of the hook
Caution! Danger of injury!
Switch off the main switch ! Before starting the
setting operation, weit until the motor stops!
- Remove the throat plate and the trimming knife
together
with its holder.
- Unscrew the screws (1) and remove the splice (2).
- After having suitably turned a bit the hook, remove the
bobbin case (3).
- Unscrew thorougly the screw (4).
- Remove the body of the hook (5) upwards.
- When mounting, the procedure is inverse.
3.1.9 Setting the gear
The mutual angular orientation of the gear wheel (1) relative
to the gear wheel (2) should ensure the accessibility of the
screw (5) at the moment when the hook point comes to lie
opposite the needle (4). The wheel (2) is to be set with its gear
rim symmetrically to the centre of the gear wheel (1). The
clearance between the gear wheels is to be the least possible.
Caution ! Danger of injury!
Switch off the main switch! Before starting the
setting operation, wait until the motor stops!
- Set the angle of 2O5
°
on the handwheel (6) and lock it with
the screw (7).
- On the removed post of the hook (8), according to the pa-
ragraph 3.1.10, the hook point (3) is to be turned a bit
according to the illustration.
- Turn the gear wheel (2) into the suitable position and insert
the post of the hook into the machine according to the
respective arrows. Check up, whether the screw (5) is acces-
sible and, if not, repeat the procedure.
- Set the the distance of the hook from the needle according
to the paragraph 3.1.3.
- Set the precise angular displacement of the hook according
to the paragraph 3.1.4.
- Loosen the screw (10) and tighten them slightly.
- Set the clearence in the gear in turning the screws (9). Check
up, whether the gear has a clearance during the whole
revolution of the hook. Turn the handwheel step by step by
15
°
and, with each step, grasp the hook and try, if there is an
angular dead travel. Tighten carefully the screws (9).
- Tighten duly the screws (10) and try anew the clearance of
the gear.
5
2
1
3
4
3
4
7
6
205
o
8
10
10
9
1
2
3
4
5
