HappyJapan HCR3-1502, Maintenance Manual

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4-2-7 Adjustment of needle bar lowest point
9. Loosen a fixing screw of fasten collar.
Fasten collar
10. Turn Fasten collar to the forward direction and move
needle bar.
< Note > Please do not turn the fasten collar so much,
because the measuring range of the Dial-gauge is limited.
In case needle bar can not be moved,
Fixing screw for Fasten collar is loosen too much.
Tight fixing screw for Fasten collar gradually up to the
position that needle bar can be moved.
< Note > If loosen too much, fasten collar will start slipping
against needle bar cam.
If tight too much, needle bar can not be moved again.
Fasten collar
11. Check movement of the Dial-gauge with turning fasten
collar forward and back ward then, find needle bar lowest
point that the movement of the dial-gauge stops.
12. Tighten fixing screw of fasten collar.
Fasten collar
13. Turn brake switch off.
14. Turn upper shaft to set dial disc to [ 355 degrees ], Turn
main shaft forward and back ward with checking the
Dial-gauge movement then, stop the main shaft at needle
bar lowest point.
Confirm that the dial disk is located at 355 degrees.
If the angle is not correct, repeat steps from 9 to 14.
15. Put removed all parts back to finish.
16. After adjustment, confirm the needle height and rotary
hook timing also.
Please refer to [ 4-2-6 Adjustment of needle height ]
[ 4-4-1 Adjustment of rotary hook timing ].