Festo ADN Series, Repair Instructions

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22 / 34 Festo 7ADNc_en
Note
Check the plain bearing in the bearing cap (the front and rear bearing caps
of cylinders with through piston rod (S2 / S20)) for visible damage which
can impair its function, such as deposits and scoring. The entire bearing cap
must be replaced if the plain bearing showing signs of significant damage.
3. Clean the seat of the piston rod seal
1
.
4. Clean the seat of the O-ring
2
.
1 2
5. Grease the new piston rod seal (one per bearing cap on cylinders with
through piston rod (S2 /20)) as follows:
Area Greasing
1
Grease reservoir
1)
of piston rod Fill 2/3 with grease
2
External surface of bearing cap Apply a thin film
1)
of
grease
3
Grease reservoir
1)
of bearing Fill 2/3 with grease
1)
see Chapter 8.2 “Greasing”
1 2 3
6. Insert the piston rod seal into the bearing cap (into both bearing caps of
cylinders with through piston rod (S2/20)).
Note
Note the installation direction (individual sealing lip facing the outside).
7. Grease new O-rings.
8. Insert the greased O-rings into the slots in the bearing cap and end cap (the
rear bearing cap of cylinders with through piston rod (S2/20 )).
9. Position the matching mounting sleeve (see Chapter 10.2 “Special tools” )
on the thread of the piston rod to protect the bearing and seals from
damage.
10. Push the bearing cap (both bearing caps of cylinders with through piston
rod (S2/20)) over the mounting sleeve (see Chapter 10.2 “Special tools” )
onto the piston rod up to the cylinder barrel.
11. Position the rear end cap on the cylinder barrel.