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Festo 7ADNc_en
8
Cleaning and Greasing
8.1
Cleaning
The seals are designed so that the lubricant film applied to them is effective for the entire service life of the seal. The
cylinder must be cleaned thoroughly to remove all foreign particles, machining residues and old lubricants before it is
greased to ensure this lift-time lubrication is retained.
Note
Festo recommends use of Loctite 7063 or Loctite 7070 for cleaning.
When using other cleaning agents, make sure that they do not corrode the seals of the cylinder with piston rod. If in
doubt check the resistance of the seals with the help of the information of the Festo website (
).
8.2
Greasing
The various components and seals of the cylinder with piston rod require different levels of greasing depending on a
number of factors.
Note
To ensure life-time lubrication, after greasing the piston rod with assembled piston and piston seals must be moved
several times along the entire stroke of the cylinder barrel to produce a uniform lubricant film.
8.2.1
Definition of terms
Grease reservoir
A defined quantity of grease is enclosed between two edges or in an enclosed ring volume.
Thin grease film
A film of grease covers the bearing surface so that the grease colour darkens the surface slightly.
Recommendation:
Apply the grease with a paint brush, a fine bristle brush or similar.
Extremely thin grease film
A barely continuous film of grease covers the bearing surface. The grease may give a sheen to the surface; however, the
colour of the grease must not darken it.
Recommendation:
Apply the grease using a cloth or similar dipped in the grease. Remove excess grease.
9
Maintenance and care
Use a soft cloth to remove contamination from the piston rod.
All non-abrasive cleaning agents are permissible. In addition, the cylinders are maintenance-free as they have been
lubricated for life. Regular removal of the lubricant on the surface of the piston rod reduces its service life.
