JUKI LK-1900AN Engineer's Manual page 43

1. When incorporating the AT solenoid unit !0 , the solenoid cable !1 should be laid beside the AT so-
lenoid. If this solenoid cable !1 is positioned in the vicinity of the AT link unit (rear) 4 , this will be a
cause of AT solenoid malfunction.
2. The center-to-center distance is 358 mm between the AT joint block 8 of the AT connector rod .!2
In cases of disassembly and reassembly of the AT joint block 8 , the center-to-center distance must
be secured correctly. In addition, the parallelism of the two front and rear joint block 8 must also be
secured, without fail. If the correct distance and parallelism are lost, this can be a cause of AT mal-
function and normal sewing tension cannot be obtained.
3. Upon the completion of all reassembly work, confirm that there is a close contact between the thrust
collar !3 and the AT solenoid unit !0 . If any clearance is perceived, loosen the two set screws 9 and
assemble the AT solenoid unit !0 after it has been moved to the left side (in the direction of the arrow
F ).
* If the above-mentioned center-to-center distance is great between the AT joint block 8 , the clear-
ance will be opened wider.
Cautions for disassembly and reassembly
358 mm
– 31 –
Secure parallelism between plane and plane.