Replacing The Needle Thread Trimming Knife; Changing The Thread Trimmer Retaining Plate (Needle Thread Trimmer Type); Standard Of Replacing Time Of The Gas Spring - JUKI MEB-3810N Series Instruction Manual

(4) Replacing the needle thread trimming knife

WARNING :
1. Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start
of the sewing machine.
2. To avoid unexpected personal injuries, be sure to keep away from the bobbin thread trimming
knife and needle thread trimming knife during the adjustment procedure.

(5) Changing the thread trimmer retaining plate (needle thread trimmer type)

WARNING :
1. Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start
of the sewing machine.
2. To avoid unexpected personal injuries, be sure to keep away from the looper thread trimming
knife during work.

(6) Standard of replacing time of the gas spring

DANGER :
There is a risk of pinching of hand, fingers and arms to cause a serious injury if you raise it
when the gas spring does not function, since the sewing machine is very heavy in weight. In
order to prevent an accident, be sure to replace the gas spring with a new one before it is too
late according to the standard of replacing time (as described below).
WARNING :
1. Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start
of the sewing machine.
2. To avoid unexpected personal injuries, be sure to keep away from the looper thread trimming
knife during work.
❶
❷
❶
Gas spring is one of the consumables. Gas inside the gas spring
will be gone naturally even when the frequency of use is low and
the spring cannot display the thrust to secure the safety.
If a load equal to or larger than 156N is required when the sewing ma-
chine is lifted by strapping front foot section ❶ of the bed with a piece
of string as shown in the figure at the left, immediately change the
gas spring with JUKI's genuine gas spring (part number: 40100390).
When the needle thread is not cut sharply, replace
the needle thread trimming knife with a new one. The
part number of the needle thread trimming knife is
40115277.
"10-11. Installing position of the needle
Refer to
thread trimming knife" p. 89
knife.
When the looper thread and the gimp are not smoothly
trimmed, replace thread trimmer retaining plate ❶ with
a new one.
Remove screws ❷ and replace the thread trimmer
retaining plate with a new one. Fix the new thread
trimmer retaining plate with two screws ❷.
1. Do not strap any section of the machine other than
front foot section ❶.
2. The gas spring has a part which is sensitive to the
lateral load when the rod section has flaws or the
gas spring has fully stretched. Carefully avoid the
gas spring being damaged and applied with exces-
sive forces during maintenance and cleaning of the
sewing machine.
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for how to install the