J+J J4C S20, Handbook

Page: 8 / 91

HANDBOOK_
J4C SERIES
08
INDEX
The J4C has 2 operating modes, automatic and manual, the required mode is selected by using a
lever on the lower half of the actuator housing (Fig 7).
The 2 positions are marked:
AUTO = Automatic operation
MAN = Manual operation
Warning: Do not remove the selector lever securing screw, as this will allow its internal mechanism
to become loose and will cause irreparable damage to the actuator’s gearbox.
Removing this screw will invalidate the warranty.
When “AUTO” position is selected:
The hand wheel, of models 20,35,55, and 85 rotates automatically, it is very important not to block
it, otherwise the actuator could suffer unrepairable damages.
EMERGENCY MANUAL OVERRIDE FACILITY:
Fig. 7
J4C 20 TO 85
Fig. 7
J4C 140 TO 300
J4C 20 TO 85
Hand Wheel
J4C 140 TO 300
Position Indicator
Automatic - Manual