Adjusting The Presser Bar Height; Motor Belt - JUKI HZL-F series Service Manual

5-16 Adjusting the presser bar height

○ Remove the frame cover.
Adjustment procedure
. Assemble the standard presser foot in the presser foot holder. Raise the presser foot lifting lever.
2. Loosen the setscrew of the presser bar position bracket. Adjust the distance from the top surface of the
throat plate to the bottom face of the standard presser foot to 6±0.3 mm. At this time, check the direction
of the presser bar so that the standard presser foot is in parallel to the feed dog groove and so that the
needle hole in the throat plate is nearly aligned with the slot in the standard presser foot.
Setscrew of
the presser bar
position bracket

5-17 Motor belt

○ Remove the front panel.
Adjustment procedure
. Set the motor timing belt to the motor pulley and the motor shaft pulley.
2. Adjust the motor bracket so that the belt deflection amount becomes 6±1 mm when pressing the center of
the belt with a force of 0.98 N. After completion of adjustment, tighten the setscrew in the motor bracket.
Motor pulley
Motor shaft pulley
6 ± 1 mm
0.98 N
Motor bracket
Setscrew of the motor bracket
Setscrew of the motor bracket
– 22 –