JUKI MOL-254 Engineer's Manual page 69

1. Fit timing belt inside the machine head.
(Caution) The timing belt prevents water absorption by means of the drying agent, silicagel.
Perform the tension adjustment within two hours after taking out the belt from the
packing case.
2. When fitting main shaft
into the main shaft.
(Caution) ○ At this time, fit the timing belt around the main shaft as shown in Fig. 2.
○ Insert the parts in the order as shown in Fig. 3.
3. Insert main shaft into counter weight
At this time, adjust the hole in the main shaft to the peak of the setscrew and fix the main shaft.
(Fig. 4)
4. Remove the play in the main shaft with the thrust collar. (Refer to page 7.)
5. Install the hand pulley gear.
6. Install thread trimmer cam
7. Install crank rod .
8. Insert main shaft driving pulley
rotation to the flat portion of main shaft to install it.
At this time, install the pulley at the position where it is located 2 mm from the end face of the crank
as shown in Fig. 5.
9. Insert rear bearing
Disassembling / Assembling
, insert thread trimmer cam
and fix it with setscrews
Fig. 4
. (Refer to page 15.)
into the main shaft and adjust the screw No. 1 in the direction of
.
62
−
, thrust collar
.
2 mm
Fig. 5
−
and hand pulley gear