JUKI LK-1910 Engineer's Manual page 131

Adjustment Procedures
1) Remove the motor cover.
2) Loosen setscrew 1 and remove manifold 2.
3) Install solenoid valve 3, install manifold 2 again and tighten
setscrew 1.
(Caution) When installing the solenoid valve and manifold,
be sure to securely insert bushings 4 so that they
do not fall. In addition, be careful so that there is
no clearance in respective parts since air leakage
occurs from the clearance.
4) Insert plug 5 into the upper joint of solenoid valve 3 and insert
air tube (7 described on p.123) of the needle cooler into the
lower joint B.
5) Insert solenoid valve connector asm. 6 into solenoid valve 3.
6) Insert pin contact 7 of solenoid valve connector asm. 6 into
the connector (connector marker J79) of the solenoid valve
cable asm.
(Caution) 1. In case of LK-1910 and LK-1920, when inserting
pin contact 7 into the connector, insert "+" side
(red) of solenoid valve connector asm. 6 into
No. 7 and "–" side (black) into No. 8 as shown
in the figure on the left side.
2. In case of LK-1930, connect to the connector
connecting No. designated by the memory
switch. (See p.83.)
1) When installing of the needle cooler is completed, set the needle
cooler control to operative using the memory switch.
* Refer to Instruction Manual for setting the memory switch.
(Caution) For LK-1910 and 1920, when bobbin thread winding,
close the hand valve (6 described on p.123).
Results of Improper Adjustment
126
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