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6
Disassembling
6.1 Disassembling mod. 0052 to mod. 0270
CAUTION
: It is recommended to use suitable safety equipment during the handling for maintenance because of heavy
and/or bulky parts.
1. Disconnect pneumatic and electric supplies from the actuator;
2. After having disconnected their power supply, remove carefully any accessory attached to the actuator, preventing any
damage during the handling;
3. Detach the actuator from the valve taking careful note of all references that may be helpful for the attachment after
maintenance.
4. Place the actuator on a support with a square of the same size of the pinion ( 2 ) so as to easily execute the below listed
operation (see Fig. 1):
5. Before disassembling the actuator check from the label on the body whether it is a double acting (DA) or spring return
(SR ) type;
6. For DOUBLE ACTING ACTUATOR: Unscrew in crossed sequence the screws ( 25 ) for fastening the end caps ( 21-22 )
see Fig. 2
7. For SPRING RETURN ACTUATOR: Unscrew GRADUALLY in crossed sequence the screws (25) for fastening the end
caps ( 21-22 ), Fig. 2; Note: the screws are long enough to hold the springs even if extended; Loosen nuts ( 16 ) and
unscrew completely screws ( 17 ) see Fig. 3 ;
8. Rotate the cylinder ( 1 ) in CLOCKWISE direction (top view) holding the pinion ( 2 ) so as to release the rack of the
pistons ( 12 ) from the pinion ( 2 ) and to push the pistons towards to the cylinder ends. Now both pistons ( 12 ) can be
removed see Fig. 4.
NOTE: Do not use compressed air to remove the pistons ( 12 ) from the cylinder ( 1 )
9. Remove the snap ring ( 11 ) from the pinion ( 2 ), the washer ( 10 ), the spacer ( 9 ) and the O-ring ( 6 ) see Fig. 5 ;
10. Extract the pinion ( 2 ) from the cylinder ( 1 ) by pushing it down, with special caution for all
seating’s, see Fig. 5
(if necessary use a rubber hammer);
11. Tilt the cylinder (1) and let the cam (7) slide out, see Fig. 5.
