AUMA Part-turn gearboxes GS 50.3 - 250.3, primary reduction gearings VZ 2.3 - 4.3_GZ 160.3 - 250.3 - Manual (Page 17)

10.2 Changing the swing angle for sizes GS 160.3 – GS 250.3 .
Remove all bolts (054) and pull off protective cap (16)
(figure J). .
Remove screw (082) with washer (058) and setting ring (34).
Increasing the swing angle
.
Turn end stop nut (15) back counterclockwise.
.
Move valve into the desired end position.
.
Turn end stop nut (15) clockwise until it is tight up to the stop nut (7).
Reducing the swing angle
.
Move valve into the desired end position.
.
Turn end stop nut (15) clockwise until it is tight up to the stop nut (7).
.
Place setting ring (34), secure with washer (058) and screw (082).
.
Check O-ring (056) and replace, if damaged.
.
Place protective cap (16), fasten bolts (054) with lock washers (055).
.
Fasten bolts crosswise with a torque according to table 3.
.
If gearbox is mounted to a multi-turn actuator, set limit switching again for the
end position OPEN according to the operation instructions SA/SAR. Allow for
overrun.
17
Operation instructions Worm gearboxes GS 50.3 – GS 250.3