2 - 23
Needle bar, presser mechanism / Upper shaft mechanism
Basics of Assembly
Basics
3 Phase matching of Upper shaft and lower shaft
1. Rotate the upper shaft 1 until the trench on the upper shaft pulley 2 is at
the front.
2. Turn the lower shaft 3 to the point where the mark on the outer rotary
hook 4 is at the front, the larger feed cam 5 is at the rear, and the hole on
the lower shaft 6 is at the vertical.
3. Pull the timing belt 7 and hang it on the timing pulley D 8.
1
7
8
4
6
3
5
3
7
2
Front Rear
4 Attachment of Tension pulley assy
1. Set the tension pulley assy. 1 to the rear cover assy., and then temporarily
tighten the 2 screws 1.
*Key point
• Fully tighten the screw 1 after performing "4 - 4 Adjustment :
Timing belt tension".
→ Refer to 3 - 63 "Assembly of Tension pulley assy".
1
Torque
1.18 – 1.57 N·m
1
1
Giza Tite
M5X16
To Next Page
Loading...
Need help?
General
