Reliable MSK-8420B - Manual (Page 13)

30
29
oil amount
adjusting screw
increase
reduce
nut
special screw
crank
increase
reduce
crank link
-10-
5.5 Presser foot lift volume adjustment (Fig.29)
when stitch on the very elastic material or the
thickness of the sewing material is changed. The ad-
justment should be done in the following order:
1. Loosen the special screw.
2. When the centerline distance between the special
screw and the presser foot lift rear crank becomes
shorter, the presser foot lift volume will become longer.
On the country the distance becomes longer, the lift
volume will become shorter.
3. After adjustment, tighten the special screw. The
common presser foot lift volume can be adjusted in
the range of 2-6 mm.
5.6 Hook oil amount adjustment (Fig.30)
It adopts plunger full auto lubrication system,
even at very low speed, it can supply and suck oil very
well. Generally only the hook oil amount can be ad-
justed, the other can not be adjusted. The hook oil
amount can be obtained by the oil amount adjusting
screw. First loosen the nut of the adjusting screw,
turn the scre clockwise to increase the oil amount,
on the contrary reduce the oil amount. After adjust-
ment, tighten the nut.
w