JUKI HZL-T100, Service Manual

Page: 12 / 28

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7. Main shaft, operating
lever receiving plate
Preparation required
Remove the top board and
the face plate cover.
Remove the front panel.
Remove the microcomputer
circuit board and the idler.
Remove the timing belt.
Remove the needle bar
connecting rod.
Remove the motor belt.
Disassembly Assembly Point to be checked
Remove two screws , and remove
the operating lever shaft receiving plate
(asm.).
Loosen screw in the needle bar crank.
Remove screw in the ball bearing
receiving plate located at the right-hand
side and remove the right-hand receiving
plate. Also, remove screw in the ball
bearing receiving plate located at the left-
hand side and remove the left-hand re-
ceiving plate.
· Detach the right-hand end of the main
shaft from the frame, and draw out
needle bar crank rod from the needle
bar connecting stud.
Or, remove the needle bar crank. · Attach the main shaft in place.
(Engage the main shaft with the
needle bar crank or the crank rod.)
· Set the operating lever shaft receiving
plate in place, and fix it with the
screws. * Set the timing belt and the motor
belt in place.
· Check the torque and thrust play of
the main shaft.
· Check the retaining position of the
leads.
Screw in the operating lever
shaft receiving plate
Screw in the
needle bar crank
Needle bar crank rod
8. Cylinder bed receiving plate (asm.)
Remove the top board and the bed base.
Remove the cylinder bed lower cover.
Loosen the idler.
(See No.3 on page 8)
Disassembly Assembly Point to be checked
Remove timing belt (large) from the
hook driving shaft pulley.
Remove five screws in receiving
plate .
· Remove the receiving plate of the
cylinder bed.
Remove knife change-over lower link
from engaging section .
· Engage the knife change-over lower
link with the receiving plate, and fix
them with the five screws.
· Put the timing belt (large) in place.
Check the needle entry and the
clearance provided between the
needle and the blade point of the hook.
· A uniform clearance should be
provided between the frame and the
throat plate (needle plate).
· Check the torque of the hook driving
shaft.
· When putting the timing belt in place,
refer to the description indicating the
timing of thread trimming (No.2 on
page 22.)
Timing belt (large)
Knife change-over lower link
Screw in the cylinder bed receiving plate
Screw in the main shaft ball bearing
Idler
Timing belt (large)
Knife change-over lower
link engaging diagram
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