Service-Manual_artista_630_640_english_V4.01_032069_50_04.doc
33
4.15 Stepping motor, stitch length and crankshaft
Disassembly:
1. Remove
covers.
2. Remove balance shaft (
28
)
including screw (
29
).
3. De-hook tension springs (
30-34
)
and remove P-Print plug (
146
)
(
p. 26
).
4. Remove both securing screws
(
35
) of the motor bracket (
36
).
5. Remove bushing support (
37
)
including screws (
37a
) and
crankshaft.
6. Replace crankshaft if
necessary.
7. Remove motor bracket.
8. Remove drive pinion (
40
)
including screw (
40a
).
9. Remove the two securing
screws (
41
p.26
)
10. Replace stepping motor.
28
35
39
34
33
36
35
29
38
37a
31
167
30
37
32
