Brother BAS-311E Service Manual page 50

Chapter 3. Assembly
V notch
t
!9
!8
Align
w
@1
w
@1
42
!1
!6
e
0.5 - 1mm
q
!1
!4
!3
@0
w
@3
@1
@2
0.5mm
BAS-311E.311EL.326E.326EL
6. Turn the pulley to align the needle bar with the shuttle
hook. At this time, turn the stepping work clamp con-
necting rod !8 to turn stepping work clamp arm F !1 in
the direction of the arrow and move the stepping link
assy ! 6 in the direction of the arrow. When the presser
foot is at the lowest position, secure the stepping work
clamp connecting rod !8 to the upper shaft @0 using the
set screw !9 .
Adjust the lift stroke of presser foot A to 3-5 mm, and 5-8
mm. When the clearance between the presser bar lifter
e and the presser bar bush q is 0.5 - 1 mm, tighten the
bolt ! 4 of stepping work clamp arm R ! 3 . (At this time,
the match mark of stepping work clamp arm F !1 will be
almost aligned with that of arm.)
Note: Make sure that stepping work clamp arm F ! 0 has
no end play.
7. Secure the needle bar clamp t using the screw so that
when the presser bar w is at the lowest position. The
distance between the bottom of the presser bar w and
the top of the needle plate should be 23 mm. (22 mm for
311EL.)
Attach the presser foot @1 to the presser bar w so that
the top of the presser foot @ 1 is aligned with the top of
the screw that holds the presser foot @ 2 .
@2
8. Attach the needle @2 to the needle bar @3 .
9. Turn the pulley to insert the needle @2 into the hole of the
presser foot @1 . Turn the presser bar w so that the
needle @2 is in the center of the hole of the presser foot
@ 1 , and tighten the screw of the needle bar clamp t.
10.Turn the pulley to set the presser bar w at its lowest po-
sition. Adjust the height of the presser foot @1 so that
there is a 0.5 mm clearance from the top of the material
to be sewn.