Attachment Of Upper Shaft Assy - Baby Lock BLDY Service Manual

Basic of Assembly
6

Attachment of Upper shaft assy

1. Set the felt to the arm bed.
2. Hang the timing belt on the upper shaft assy. Insert the fixed joint to the upper shaft assy.
3. Set the upper shaft metal to the mounting position of arm bed, then attach the metal presser and the
belt support upper to the arm bed with the two screws (taptite, bind S M4x10).
*Key point
• Be careful not to damage the rotation shutter of the upper shaft assy.
4. Set the belt support upper adjust to the belt support upper, and tighten the two screws (screw, pan (S/P
washer) M3x6) temporarily.
*Key point
• Fully tighten the screw after performing
5. Turn the cut surface of unit shaft and the cut surface of upper shaft assy to the front side.
6. Turn the fixed joint with two screw holes A to the front side, slide the fixed joint to the direction of the
arrow, and insert it into the unit shaft. Be sure to make 0.5 mm gap between the retaining ring and the
fixed joint.
7. Tighten the two screws (set screw, socket (FT) M5x5) to the fixed joint.
8. Turn the fixed joint with two screw holes to the front side, and tighten the two screws (set screw, socket
(CP) M4x4). Turn the fixed joint with the screw hole to the front side, and tighten the screw (set screw,
socket (CP) M4x4).

Refer to 3 - 107 Assembly of Upper shaft assy.
Cut surface Set screw, socket (FT) M5x5
Screw hole A
Fixed joint
Fixed joint
Screw hole A
Set screw, socket (FT) M5x5
Taptite, Bind S M4X10
Screw, Pan (S/P washer) M3X6
Set Screw, Socket (FT) M5X5
Set Screw, Socket (CP) M4X4
LED lamp / Upper driving mechanism
"Adjustment of Timing belt and belt support upper/lower
0.5 mm
Set screw, socket
(CP) M4x4
Screw hole A
Rotation shutter
Set screw, socket
(CP) M4x4
Upper shaft assy
Metal presser
Belt support upper
Taptite, bind
S M4x10
Screw, pan (S/P washer)
M3x6
2 - 44
Felt
Upper shaft metal
Belt support upper adjust
clearance".
Mounting
position
Timing belt