Brother DH4-B981 Instruction Manual page 25

3-20-2. Installing the upper thread presser
w
q
3-20-3. Replacing the plate presser and presser plate
q
w
r
3-20-4. Installing the valve unit
0851Q
1. Install the valve unit q with the screw w.
2. Remove the stopper plug (with the P mark) r from the valve unit e, and then install the joint t.
3. Connect the 6 mm-diameter air tube u to joints t and y.
r
e
q
e
w
1. Loosen the screw q, and then remove the thread guide
0759Q
w.
1.
2. Install the upper thread presser support e with the
screw q.
2. * Adjust the height of the upper thread presser support
e so that it presses against the upper thread presser
2. *
plate t when the upper thread take-up lever r is
2. *
t
2. * lowered.
0779Q
Remove the plate presser q and presser plate (U) w,
and replace them with plate presser (I) e and presser
plate (I) r.
q
0850Q
q
e
y
r
t
u
DH4-B981
3. INSTALLATION
70
Installation position
0852Q
19