Toyota ESP9000, Service Manual

Page: 39 / 111

2.TROUBLESHOOTING
・ The needle thread tension may be too high.
・ The bobbin thread tension may be too high.
・ The thread may be stuck on the thread
take-up lever.
・ The margin of the needle thread may be
insufficient. (The setting value of (9) of a
function key is enlarged)
Item Method Standard Action
Thread
wiper hook
return
Must
return
smoothly
.
Adjust.
See
P.28.
Hook tip
damage
Push the guide pin
down as far as it
will go in the
direction of the
arrow and
check the
returning
movement of
the pin.
No
damage is
identified
on the
hook tip.
Repair.
Clearance
between
the picker
and the
bobbin
Press the picker gently until it
stops. Check the clearance
between the picker tip and the
bobbin.
A=0.5～
1.5mm
Adjust.
See
P.27.
Picker
right/left
position
Clearance between the picker tip
center and rotary hook center
B=1mm
or less
Adjust.
See
P.27.
Upper thread hook
Guide
pin
Picker
Thread wiper
mechanism
Preliminary inspection
2-7 Thread comes off
needle.
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