Service Manual
Original issue
May 2014
Page
21／64
Model
XL-420
| 21
Checking:
1.
Turn on the machine,
Select straight stitch at center needle position.
2.
Remove presser foot and needle plate, and then remove bobbin case.
3.
Replace needle with special needle gauge (L=29 mm).
4.
Lower the needle gauge to its lowest position by turning hand wheel by hand.
Check to see if the bottom of the needle gauge aligns with shuttle race pushing
the needle lightly as shown by arrow mark. Needle bar height is high, if needle
gauge hooks with the needle gauge when race is pushed by small screw driver
towards the shuttle.
* Simple checking method without needle gauge:
1.
Attach standard needle (#90) and set needle at its highest position.
2.
Check to see the distance between needle plate and a tip of needle is about
14.6 - 15 mm as shown below.
Shuttle race
Needle gauge L =29 mm
Center needle position
Push the needle gauge by
small screw driver.
14.6-15mm from the surface
of needle plate
Highest position of Needle
Needle position at center
SEC.7-1 Needle bar height (1)
