Festo VTSA Series Description page 146

5. Maintenance and conversion
5−12
Removing the components
1. Unscrew the screws of all components above the respect
ive position.
2. Remove these components from the valve position.
Mounting new components.
1. Check the seals for damage. Replace the seals if they are
damaged.
2. Place the new component on the valve position or onto a
component already mounted.
3. Fasten the new component. For width across flats of the
hexagon socket wrench, see Tab. 5/4.
Festo P.BE−VTSA−44−EN en 0905e