Festo DGE-25 ZR RF Series, Repair Instructions

Page: 28 / 68

28 / 48 Festo 7DGE_25-63_ZR_KFb_en
4.5.1 Preparing the cylinder barrel
• Clean the cylinder barrel using a cloth and an air gun.
• Blow out the cylinder hole and the toothed belt throughfeed using an air
gun.
• Apply a continuous film of lubricant to the bearing surface of the cylinder
hole and the guide slot of the piston using a grease brush.
Documents
The greases to be used are described in section 5.1 “Cleaning and lubricating
the toothed belt axis” .
4.5.2 Preparing the clamping bodies
One of the two clamp pieces must contain a magnet (see chapter 3 “Component
overview” ).
Note
The north pole of a new magnet is indicated with a red dot. The north pole
must be pointing towards the clamp piece during installation.
• If necessary, insert a magnet in one of the clamp pieces using Loctite 6620.
4.5.3 Preparing the piston
For new pistons for toothed belt axes with slide only:
• In the case of newly ordered pistons, the 90° countersinks in the inner holes
must be reworked for use in toothed belt axes with slide. The following
values apply for this:
Type Countersink diameter D
DGE-25 ø 11
H13
DGE-40 ø 13
H13
DGE-63 ø 17.2
H13
D
90°
• Check the following wearing parts on the piston and replace them if necessary:
– Guiding bands
– Band guides
– Lateral scrapers