Maintenance Instructions; Needle Bar Height Adjustment - Jack C4 Training Courseware

Maintenance instructions

Screw of needle

1. Needle bar height adjustment

bar adjustment
When the needle bar
comes to the heighest
point, and the distance
between needle to needle
plate is 10.5mm(4
threads) and
10.5mm 10.5mm
11.5mm(5threds),then
fasten the screw.