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Disassembling/assembling procedure
1. Loosen and remove three setscrews 1 in the face plate.
2. Bring the needle bar to its upper dead point, loosen and remove needle clamp screw 2. Then loosen
and remove the needle clamp bracket (with the needle clamp bracket hook in case of needle gauge of
3 mm or more).
3. Remove rubber cap 3 of the needle bar upper metal located on the top surface of the machine arm.
Loosen needle bar bracket clamping screw 4 and draw out upward the needle bar. Remove the
needle bar bracket.
4. Loosen setscrew (left hand screw) 5 in the needle bar crank rod, remove first thread take-up needle
bearing and remove needle bar crank rod 6.
5. Remove rubber plug 7 located on the rear side of the machine arm, enter the hexagon wrench from
the hole for screwdriver, loosen first the needle bar crank bracket clamping screw, then loosen the
setscrew to remove the needle bar crank.
6. Pass the needle bar crank to change through thread take-up lever, needle bearing, protection plate 8,
and counterweight. Press the needle bar crank until it will go no further.
7. Tighten setscrew 9 at the flat section of the needle bar crank.
When using the free-setting needle bar crank, stop it at the optional position, after assembling all
components, loosen the needle bar crank setscrew and determine the position while performing
adjustment.
8. Tighten needle bar crank bracket clamping screw !0. At this time, check whether there is any lateral
play at the thread take-up lever. When there is a play, loosen the needle bar crank setscrew and press
the needle bar crank to the back. However, when there is a skew between the needle bar crank and the
thread take-up lever, the seizure of thread take-up lever will be caused. So, be careful.
9. Enter first needle bar crank rod 6 to the needle bar crank and enter the needle bearing between the
needle bar crank and the needle bar crank rod.
10. Tighten setscrew (left hand screw) 5 in the needle bar crank rod.
11. Enter the needle bar bracket to the needle bar crank rod and enter them to needle bar bracket guide
roller !1.
12. Insert the needle bar into the needle bar bracket from the upside and screw the needle clamp to the
needle bar.
13. For the height and positioning of the needle bar, refer to (5) Height of the needle bar.
14. Re-adjust (11) Timing of relationship among the needle, looper and spreader.
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