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Disassembly procedure
Removal procedure of the gauge and upper feed roller
1. Loosen the setscrew and remove the needle bar and the roller cover together with the face cover and
the packing, which are attached to the rear side.
2. Loosen the nut with a 3/8” spanner and remove the washer and clutch rod .
3. Remove the roller pressure regulating screw .
4. Loosen the setscrew securing the upper feed roller shaft with a 3/32" key wrench, remove the setscrew
securing the link, lift the upper feed roller shaft and the guide finger , and remove the upper feed
roller assembly .
(Caution) When the upper feed roller shaft is lifted, the guide finger interferes with the lift lever
crank . Therefore, remove the upper feed roller assembly after lifting the lift lever crank
slightly.
5. Loosen the pressure regulating nut and remove the pressure regulating plate spring assembly .
6. Loosen each setscrew that securing corresponding needles and remove three of each needle .
7. Loosen the setscrew securing the presser yoke with a 5/64" or 2mm key wrench and remove the
presser yoke after lifting the presser shaft .
8. Loosen the setscrew with a 3/32" key wrench and remove the setscrew securing the cover.
Removal of the setscrew allows you to remove the looper cover and spring stud .
9. Loosen three setscrews securing the throat plate and remove the throat plate .
10. Loosen the setscrew and remove the differential feed dog .
11. Loosen the setscrew and remove the main feed dog .
12. Loosen the setscrews securing the loopers and remove the loopers .
(Caution) The disassembly procedure mentioned above mainly describes about the differential feed
mechanism.
As to the 1 piece feed mechanism, the differential feed dog and setscrew are not
provided.
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