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Festo 7CRHDb_en
•
Place the insert sleeve for the piston on the other end of the cylinder barrel.
Push the piston far enough through the cylinder barrel and insert sleeve so
that the fi rst lip ring protrudes slightly out of the insert sleeve.
•
Pull the piston rod back again until the piston is sitting fully in the cylinder
barrel.
Note
This approach ensures that the sealing lips of the two lip rings sit correctly in
the cylinder barrel.
4.3.5
Repairing and attaching the bearing and end caps
•
Remove the piston rod seal
1
from the bearing cap
2
.
•
Remove the O-ring
3
from the groove of the bearing cap and end cap.
•
Remove the cushioning seal
4
from the bearing and end caps.
1
3
2
4
Warning
Check the plain bearing in the bearing cap for visible damage that might
impair its function, such as deposits and scoring. The entire bearing cap
must be replaced if the plain bearing is showing signifi cant damage.
•
Remove any residue of the screw locking agent from the threads of the bear-
ing and end caps.
•
Clean the seat of the piston rod seal
1
.
•
Clean the seat of the O-ring
2
.
•
Clean the seat of the cushioning seal
3
.
See chapter
5.1 "Cleaning"
.
1
2
3
•
Grease the new piston rod seal as follows:
Area
Greasing
1
Grease reservoir
1)
for piston rod
Fill 2/3 with grease
2
External surface for bearing cap
Thin fi lm
2)
3
Grease reservoir
1)
for bearing
Fill 2/3 with grease
1)
See chapter
5.2.3 "Grease reservoir"
2)
See chapter
5.2.2 "Thin grease fi lm"
1 2 3
