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9
10
4
11
A
B. When the machine starts for initial time or reuse
after a long time, the proper oil amount should be filled
in the sections of machine shown by arrows in Fig. 8,9.
When it is in operation, please observe the oil sparking
in oil screen to check the oil condition. .
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C. When a new machine starts running, for extending its
lift, please run at a medium and low speed (1000s.p.m)
for about a month and then raise the speed gradually.
D. Please turn off the power when it is not in use or the
operator leaves away from it.
E. Replace the oil every month, when replacing, fully
drain off the old oil in the oil pan and add the new one.
F. For MSK-8420BL-18, the needle gauge options are: 6.4,
3.2,4,4.8,8,9.5,12.7,16,19,24.5mm. To get it, the needle
plate, inner and outer presser foot, needle holder, feed
dog, left and right sliding plate, thread guide should be
changed, the standard needle gauge is 6.4mm, for the
other needle gauge, the relevant parts can be ordered
from the factory.
1. Coordination among needle, thread and materials
Please use needle DP 17 or 135 17, Nm125 180, the
coarseness of needle should be in accordance with the
nature of materials. If stitching on heavy weight
materials with a slim needle, the needle will be broken
easily. Needle skipping or thread breakage will also
occur. On the contrary, stitch on tightly materials with a
very coarse needle, the materials will be destroyed
because of over-big needle hole, so the needle and
thread should be properly selected. .
2. Install the needle (Fig. 11)
Turn the hand wheel to lift the needle bar to its highest
position, loosen the needle set screw A, fully insert the
needle shank up to the bottom of needle holder, keep the
long grooves of the two needles opposite with each
other, then tighten the set screw as shown in Fig.(a), For
single needle, keep the long groove of needle facing the
left of the operator as shown in Fig.(b).
Note: Fig.(c) insufficient insertion or Fig. (D) wrong
direction of needle groove is incorrect.
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Oil screen
Single
needle
Clearance
Long groove leftward