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Festo 7DFPIb_en
6
Cleaning and greasing
6.1
Cleaning
The seals are designed so that the lubricant film applied to them will be effective for the entire service life. The linear
actuator must be thoroughly cleaned of all foreign particles, machining residues and old lubricants before it is greased to
ensure that this "life-time lubrication" is retained.
Note
Festo recommends LOCTITE 7063 and LOCTITE 7070 for cleaning.
When using other cleaning agents, make sure that they do not corrode the seals of the linear actuator. If in doubt,
check the resistance of the seals using the data on the Festo website (
).
6.2
Greasing
6.2.1
Definition of terms
The various components and seals of the linear actuator require different levels of greasing depending on a number of
factors.
Note
To guarantee the life-time lubrication, the piston rod with assembled piston and piston seals must be moved across
the entire stroke of the cylinder barrel several times after greasing in order to produce an even lubricant film.
Grease reservoir
There is a certain amount of oil enclosed between two sealing rims or in enclosed ring volumes.
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 soft brush or similar.
Extremely thin grease film
A barely continuous film of grease covers the bearing surface. The grease can 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 object that has been dipped in the grease.
Remove the excess grease by scraping once with the relevant seal system components (e.g. by drawing the installed
piston with piston rod fully through the greased cylinder barrel once) and then remove the excess from the seal
components by wiping it off.
