Page 6 of catalogue Pneumatic part-turn actuators of Fergo Armaturen GmbH

MANUAL - Pneumatic ACTUATORS TYPES DA + SR
5. preventive maintance 5.1 This basically consists in a periodic inspection to see the correct functioning of the actuator.

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5.2 Actuators must be operated at least once every six months. However, depending on the application of the actuator, this may be done within shorter periods. 5.3 It is the end user’s responsibility to establish these operation plans depending on the working conditions. WARNING !! Never leave the actuators opened or closed during a long period of time. 5.4 It is recommended to replace O\-Rings, guides and Washers when an in-depth revision of the installation is made. 6. maintance operations 6.1 PRECAUTIONS BEFORE DISASSEMBLY !! 6.1.1 Disconnect the actuator and its accessories from the air and electrical network. 6.1.2 Disassembly the solenoid from the actuator. 6.1.3 Disassembly the actuator from the valve and/or from its Couplings. WARNING !! Always wear adequate protective clothing (Follow the safety guidelines established by your company!) Any parts replacement should be done with the original Fergo spare parts!! The manufacturer will not be responsible of the wrong functioning of the actuator if original Fergo parts have not been used. 7. reasons for parts and replacement Parts of the actuator will have to be repaired or replaced as soon as leakage is detected through the upper O-ring (111) or lower Oring (110) of the pinion, through the O-ring (109) of the piston or through the O-rings (118) of the end caps. As soon as this happens, proceed with the disassembly of the actuator and replacement of all the O-rings, bushings, slide guides and washers. 8. disassembly of the actuator: Once the precautions prior to the disassembly have been taken, follow the next steps: 8.1 Disassembly the end caps (4) of the actuator by untightening the external Bolts (113). WARNING !! In SPRING RETURN ACTUATORS there is no danger when doing this operation as the fastening bolts of the caps have the adequate safety length for each size. 8.2 Unfasten the Nuts (934) in order to remove the leveling Screws (16). 8.3 Turn the pinion (3) anticlockwise to disengage the pistons (2) in normally closed actuators and clockwise in normally open ones. Remove the pistons from the cylinder. 8.4 Disassembly the position indicator (20), the slip washer (471), the soft pinion washer (5) and the metallic pinion washer (8) from the upper side. 8.5 Disassembly the pinion (3) from the lower part of the body (1) of the actuator. To do this operation, disassembly the upper pinion bearing (10) and the stop (12) through the inside of the body. 8.7 Examine all the parts in order to see if there is any wear due to an over-use. WARNING !! Carefully examine the inside of the cylinder.
Design and materials can be changed without notice. Errors and omissions excepted

8.8 If everthing is in perfect conditions, replace the O-rings, bushings, slide guides and washers that make up our Spare Kit before assembling the actuator. 8.9 Lubricate the parts of the actuator with Molicote B 2-2 plus grease. Apply a thin layer of grease on the O-rings (109, 110 & 111).

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