Festo DZF - Inserting the Piston Rod into the Cylinder Barrel

18 / 24 Festo 7DZF / DZHb_en
• Replace the components contained in the set of wearing parts:
– the two groove rings and
– the two-piece guiding band.
4.4.4 Inserting the piston rod into the cylinder barrel
• Clean the inside surface of the cylinder barrel as described in chapter
5.1 "Cleaning".
• Apply the grease included in the set of wearing parts to the following parts:
Component Greasing
Inside surface of cylinder barrel Thin  lm
1)
Surface of piston rod Thin  lm
1)
Groove rings in piston seal Thin  lm
1)
on outside
Piston surface between piston seals (grease reservoir
2)
) Fill 2/3 with grease
Cushioning boss Thin  lm
1)
on outside
1)
See chapter 5.2.2 "Thin grease  lm"
2)
See chapter 5.2.3 "Grease reservoir"
• Place the piston  at against the front side of the cylinder barrel and insert
the piston seal into the cylinder barrel by tilting it slightly.
The sealing lip must not fold back against the side of the piston.
Note
If necessary use a  at and blunt-edged object to insert the groove ring into
the cylinder barrel.
• Insert the piston fully into the cylinder barrel.
• Push the piston far enough into the cylinder barrel so that the groove ring
protrudes slightly at the other end of the cylinder barrel.
• Pull the piston rod back again until the piston is sitting fully in the cylinder
barrel.
Note
This approach ensures that the lips of the two groove rings sit correctly in
the cylinder barrel.