19
MODEL 520
MECHANICAL ADJUSTMENT
REPLACEMENT AND ADJUSTMENT OF THE NEEDLE
THREADER PLATE
If the hook of the threader plate is damaged, change or adjust the part as follows:
TO CHANGE THE THREADER PLATE:
TO REMOVE:
1. Push down the needle threader knob and pull the needle threader plate (A) down to remove
it (see FIG 1).
2. To install the needle threader plate, line the groove up with the pin (B) and push it up to snap fit.
TO ADJUST THE THREADER PLATE POSITION:
1. If the hook on the threader plate touches the left or right side of the needle guide, loosen
setscrew (C) and adjust the hook position (FIG 2).
2. If the hook on the threader plate touches the top or bottom side of the needle guide, loosen
setscrew (D) and adjust the hook position (FIG.3)
Threader knob
Hook
Needle hole
Replacing the needle threader cover
(with the threader plate attached
Threader plate
supporter (A)
FIG. 1
Vertical adjustment
Threader
position set
plate
FIG. 3
FIG. 2
X
Pin (B)
Setscrew (D)
Adjustment of left or right direction
Threader plate
Nut
Setscrew (C)
View from "X"
