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Specifications subject to change without notice
Edition: August 2017
Maintenance EB 31a-01_EN
Fig. 22a
Fig. 22a
Note: For actuators from 2006:
The adjusting screws ( 2 ) of this actuator version
are mounted from the inside, into the actuator
housing. This step must carried out before the piston and end
caps are mounted.
•
Mounting the pistons
(see Fig. 23, Fig. 24, Fig. 25a, Fig. 25b, and Fig. 26)
◦ Mount the the piston O-ring ( 16 ), piston bearing ( 5 ),
and piston bearing ( 15 ).
◦ Apply grease to the bearing surface of the piston ( 25 )
inside the housing ( 29 ) and the piston rack teeth.
◦ Either clamp the top end of the shaft in a vise or hold
the shaft stationary with the corresponding counterpart
and place the housing ( 29 ) in a horizontal position
(see Fig. 23).
◦ Make sure that the cam ( 1 ) is in the correct position
(see Fig. 24).
◦ For the standard direction of rotation (clockwise to
close), turn the housing ( 29 ) by 40° to 45°
counterclockwise (view from below) or clockwise (view
from top), depending on which way the shaft is held
(see Fig 25a and Fig. 25b).
◦ Press both pistons ( 25 ) simultaneously into the
housing ( 29 ) until the pistons are engaged and turn
the housing clockwise or counterclockwise (see
above) until the travel end is reached.
◦ Check the pistons in the end position and turn the
shaft 4° over the middle line (0°) (see Fig. 26).
Fig. 23
Fig. 24
Fig. 25a
Fig. 25b
Fig. 26
