Connecting The Needle-Presser Module And Upper Shaft - Brother PE770 Service Manual

Main unit
6

Connecting the needle-presser module and upper shaft

1. Face the unit shaft D cut 1 and the upper shaft D cut 2 forward.
2. Screw the 2 screws 1 into the fixed joint 3.
*Key point
• Adjust the gap on the left side of the fixed joint 3 to 0.5 mm.
• Align the screw holes for the screw 1 with the D cuts 1 and
2.
3. Rotate the upper shaft 4 180 degrees, and screw the 4 screws 2 into the
fixed joint 3.
4. Tap the lower shaft bushing 5 on lightly so that the upper shaft 4 turns
easily.
Needle bar and presser unit assy. and fixed joint gap
1
2
7
Tension pulley assembly attachment
1. Hand start the screw the screw 1 in the tension pulley 1 and attach to the
arm bed (fully tighten after 4 - 6 "Timing belt tension.").
1
3 - 6
Needle bar, presser mechanism / upper shaft mechanism
Set Screw, Socket (FT)
M5X5
Set Screw, Socket (CP)
M4X4
Screw, Pan (S/P washer)
M4X10DA
0.5 mm
0. 5 mm gap
Torque
1.37 — 1.79 N·m
Torque
0.78 — 1.18 N·m
Torque
1.18 — 1.57 N·m
1 2
12 (Back: four)
3 4
1 1
4
5