Adjustment Procedure
Results of Improper Adjustment
1. Turn the ywheel until the needle bar ❷ comes to its lowest
position, and loosen the needle bar connecting setscrew ❶.
2. Determine the needle bar height.
Adjust the engraved marker line (marker line A for the DB
needle and marker line B for the DA needle) of the needle bar
❷ to the lower end of the needle bar lower metal ❸ and tighten
the needle bar connecting setscrew ❶. (Be careful not to tighten
the needle bar connecting setscrew ❶ too much.)
3. Determine the mounting position of the hook ❺.
Turn the three hook setscrews in the direction of ywheel
forward revolutions to raise the needle bar ❷. In this direc-
tion, adjust the engraved marker line (marker line C for the DB
needle and marker line D for the DA needle) to the lower end of
the needle bar lower metal ❸.
4. In this state, adjust the blade point ❺ of the inner hook to the
center of the needle ❹ so that a clearance of 0.04 to 0.1mm
(goal value) is secured between the needle ❹ and the hook ❺.
Since then, rmly tighten the three hook setscrews.
(Cautions) The needle bar ❸ of the DDL-9000C-FMS becomes
black because a special coating is applied to the
needle bar ❸. When it is difcult for you to check a
marker line, make the room brighter using a light and
check it.
<Information about the dry hook>
Use the following part number.
The hook part numbers come in two types according to the speci-
cations.
22890206 (without the needle guard)
22890404 (with the needle guard)
22890305 (22890206 with special surface treatment)
(Cautions) The dry hook (RP hook) tends to collect thread
chips and material dust. This can cause malfunction
or defective stitches. Periodic cleaning is required.
<Lubricated hook K: Available separately>
This is a hard blade point hook with a needle holder applicable
to needle size #9 (#65).
Where a thin needle has to be used for reasons of sewing pro-
cesses, this type of hook is applicable to the prevention of stitch
skipping and needle breakage.
About the needle bar
Specications Part No.
Amount
of looper
return
Needle shank
DDL-9000C-SMS,FMS 22886904 1.8mm φ 1.64
DDL-9000C-SMS,FMS 22887004 1.8mm φ 2.02
DDL-9000C-SMS,FMS 40086602 1.8mm φ 1.64
DDL-9000C-SMS,FMS 40086604 1.8mm φ 2.02
DDL-9000C-SSH,FSH 40061767 2.3mm φ 2.04
◦ If this clearance is too small, the
blade point of the hook ❺ may be
damaged.
Too much clearance may give rise
to stitch skipping.
◦ When you use a dry hook, buy
and mount the parts that stop the
hook oil quantity.
Refer to "3.-(6)-5) Adjusting the
amount of oil in the hook".
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