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Festo 7ADVU / AEVUa_en
•
Unscrew the hex nut (the rear part of the piston rod on cylinders with
through piston rod (S2 )) from the piston rod.
•
Remove the piston components from the piston rod, noting the order and
orientation.
•
Remove any residue of the screw locking agent from the threads of the
piston rod and hex nut.
•
Replace the components with those included in the set of wearing parts and
reassemble the piston components on the piston rod in the correct order.
•
Apply the screw locking agent contained in the set of wearing parts to
the inside of the hex nut (the rear part of the piston rod on cylinders with
through piston rod (S2 / S20)) and screw it onto the piston rod with the
corresponding torque (see table).
Type
Torque
ADVU/AEVU-125 72 Nm
4.4.4
Inserting the piston rod into the cylinder barrel
•
Clean the inside surface of the cylinder barrel as described in chapter
5.1 "Cleaning"
.
•
Apply the grease included in the set of wearing parts to the following parts:
Component
Greasing
Inside surface of cylinder barrel
Thin film
1)
Surface of piston rod
Thin film
1)
Piston seals
Thin film
1)
on outside
Piston surface between piston seals (grease reservoir
2)
)
Fill 2/3 with grease
1)
See chapter
5.2.2 "Thin grease film"
2)
See chapter
5.2.3 "Grease reservoir"
• Place the piston flat against the front side of the cylinder barrel and insert
the piston seal into the cylinder barrel by tilting and turning it slightly.
The lip of the piston seal must not fold back against the side of the piston.
Note
If necessary use a flat and blunt-edged object to insert the piston seal into
the cylinder barrel.
•
Insert the piston fully into the cylinder barrel.
• Push the piston far enough into the cylinder barrel so that the first piston
seal protrudes slightly at the other end of the cylinder barrel.
•
Pull the piston rod back again until the piston is sitting fully in the cylinder
barrel.
Note
This approach ensures that the lips of the two piston seals sit correctly in the
cylinder barrel.
