Service Manual
44
Removal:
Replacement:
1-
1-
1
Remove the free arm extension table, tension assembly dial, the knobs of the zig-zag and needle
position levers, all covers (face plate, rear, bottom bed and front), the front head end assembly, the
buttonhole assembly, the take-up lever assembly, camstack and hand wheel.
8- Rotate the arm shaft (L) slowly several times. Observe the position of the two gears with relation to
each other. The top edges of the gears should be even with each other (illustration M). If this
condition does not exist, it will be necessary to repeat the above procedure and move the vertical
bevel gear (A) up or down in order to achieve the correct position.
9- Adjust camstack radial play, take-up lever and needle bar connecting link lost motion, pendulum
timing, needle location left-to-right and needle to hook relationship. (See pages 58 to 62, 66-67 and
72 to 75)
10- Check and adjust, if necessary:
needle bar height. (pages 64-65)
left-center-right needle position. (pages 70-7 )
zig-zag lever bight stops (pages 76-79)
presser bar height (pages 84-85)
hook timing (pages 88-89)
2- Remove arm shaft sufficently to clear vertical shaft bevel gear (A).
3- Rotate vertical shaft (C) until vertical gear set screw (B) is accessible.
4- Loosen set screw (B) to remove gear (A).
Replacement is the same as removal in reverse order.
2- Check for vertical shaft end play and adjust if necessary. (See pages 54-55)
3- Locate gear (A) so the top of the gear hub is even with the top of the vertical shaft (C).
4- Locate arm shaft bevel gear (D) on the arm shaft. (See also "Bevel gear mesh and arm shaft end play"
on pages 56-57)
5- Position arm shaft bevel qear (A) and (D) so that the mark (G) on the gear (D) straddles the marks
(F) on the gear (A).
6- Lightly move bevel gear (D) to the left until it just touches vertical shaft gear (A).
7- Tighten bevel gear set screw (E) making sure it is correctly located in the "V" shaped groove in the
horizontal shaft.
l
l
l
l
l
Vertical shaft bevel gear
P/N 357773-002
MAY/00
Rev. n .
o
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