Toyota ESP9000, Service Manual, Page: 51 / 111

take-up
spring
stroke (A)
A=20
±
1
mm
Move the
retracting
lever
position
up and
down to
adjust
.
Initial
thread
take-up
spring
tension (B)
roller. Pull the thread downward and
the thread take-up spring starts
moving. Check the length of thread
pulled until the spring stops.
Hold the thread before the needle
roller and pull the thread downward.
Check the tension when the thread
take-up spring moves approximately
1mm.
B=5
±
1g
The screw
of the
retracting
lever
aligned
with the
ratchet
mark
Clearance
under the
rotary hook
support
A=0.5 to
0.8mm
Relative
positions of
the center
of the
protrusion
on the hook
support
and the
center of
e needle th
Check protrusion on hook
support visually.
B=0 ±
0.2mm
Adjust.
See
P.23.
Needle and
rotary hook
timing
A=201°±
3°
(Standar
d 1.8 to
3.1mm)
Adjust.
See
P.21.
Preliminary inspection
Center of
Lower cover
Retracting Lever
(Equivalent to 8 teeth of ratchet)
Needle Roller
Thread Take-up
Spring
Protrusion
on Hook
support
2-16 Jump function
does not work
2.TROUBLESHOOTING
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