Adjusting Backlash Between Hook Drive Gear And Lower Shaft Gear - Janome MC300E Service Manual & Parts List

MC300E
Adjusting Backlash between Hook Drive Gear and Lower
Shaft Gear
The rotary play of the hook should be 0.8 mm or less.
Adjust the backlash after the adjustment of the clearance between needle and rotary hook.
B
1
2
A
3
To check:
1 Turn the power switch "OFF".
2 Remove the base cover, bed cover, needle plate and
bobbin holder.
3 Jog the hook race with fingers to check the rotary play.
"If the play is larger than 0.8 mm or the gears do not
turn smoothly, adjust the backlash as follows".
Adjustment procedure:
1 Remove the bed cover (See page 4 ) and loosen the
1
Screw .
2 Turn the Lower shaft bushing
direction "B" when the play at shuttle hook tip is too
small.
3 Turn the Lower shaft bushing
direction "A" when the play at shuttle hook is too large.
4 Tighten Screw 1
1 Screw
Lower shaft bushing
2
The rotary hook play should be 0.8 mm or less.
3
12
2
(Eccentric), in the
2 (Eccentric), in the
securely after adjustment.