JUKI LK-1900B series Engineer's Manual

– 9 –
Procedures of assembling
1. Insert the crank rod
󱢸
, balancer
󱢴
,handpulleygearA
󱢹
, bobbin winder driver wheel
󱢺
, and the
main shaft counterbalance
❶
in the main shaft
❼
inthisorder,andmounttheassemblyontheframe.
2. Insert the taper screw
❸
inthetaperholeofthemainshaft,andtightenit.Then,tightenthesetscrew
❷
toxthemainshaftcounterbalance
❶
.
3.Lightlypressthemainshaftcounterbalance
❶
in the direction of the arrow D and also the middle metal
󱢻
inthedirectionofthearrowE.Then,tightenthetwosetscrews
❺
.
 (Tightentherstscrewsothatittouchesatlyonthemainshaft
❼
.Then,tightenthesecondone.
Same procedures followed hereafter.)
4.Tightenthetwoeachsetscrews
❹
and
❻
,respectively.
 (Makesurethattherstscrewtouchesatlyonthemainshaft
❼
.)
5.Pushthehandpulley
󱢽
inthedirectionofthearrowFsothatthehandpulleygearA
󱢹
is meshed with
thatthehandpulleygearB
󱢼
.Inthisstate,xthepulleywiththetwosetscrews
󱢷
.
6. Mount the main shaft motor
❽
and the coupling
❾
.
Refer to "3.-(2) Removal of the main shaft motor and coupling".
7.Fixthecrankrod
󱢸
with the two setscrews
󱢵
.
Refer to "3.-(3) Crank connecting rod connection/disconnection".
8.Fixthebalancer
󱢴
with the two setscrews
󱢵
.
Refer to "3.-(4) Crank balancer positioning".
9.Fixthebobbinwinderdriverwheel
󱢺
with the two setscrews
󱢶
.
 Referto"3.-(29)Adjustmentofthebobbinwinderdrivingwheelposition".
*Trytoturnthemainshaft
❼
andconrmthatthereisnotorque.

JUKI LK-1900B series Specifications

General

Brand	JUKI
Model	LK-1900B series
Category	Sewing Machine
Language	English