Festo ADN Series, Repair Instructions

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21 / 34 Festo 7ADNc_en
6.4 Inserting the piston rod into the cylinder barrel
1. Clean the inside surface of the cylinder barrel as described in Chapter
8.1 “Cleaning” .
2. Grease the following parts with the grease included in the set of wearing
parts:
Component Greasing
Inside surface of cylinder barrel Apply a thin film
1)
of
grease
Surface of piston rod Apply a thin film
1)
of
grease
Piston seal lip rings Apply a thin film
1)
of grease on the
outside
Piston surface between lip rings
(grease reservoir
1)
)
Fill 2/3 with grease
Cushioning boss Apply a thin film
1)
of
grease
1)
see Chapter 8.2 “Greasing”
3. Position the piston flat against the front side of the cylinder barrel.
4. Insert the lip ring in the cylinder barrel by tilting and turning the ring
slightly.
The sealing lip must not fold back against the inside of the piston.
Note
Use a flat, blunt -edged object to insert the lip ring into the cylinder barrel
without damage.
5. Insert the piston fully into the cylinder barrel.
6. Push the piston into the cylinder barrel until the first lip ring protrudes
slightly at the other end of the cylinder barrel.
7. Pull the piston rod back again until the piston sits fully in the cylinder
barrel.
Note
This procedure ensures that the sealing lips of the two lip rings sit correctly
in the cylinder barrel.
6.5 Repairing and attaching the bearing and end caps
1. Remove the piston rod seal
1
from the bearing cap
2
(the front and rear
bearing caps on cylinders with through piston rod (S2/20)).
2. Remove the O-ring
3
from the slot of the bearing cap and end cap (the rear
bearing cap of cylinders with through piston rod (S2/20 )).
1 3 2