25 / 49Festo 7DSBGa_en
4.3.7 Repairing and attaching the bearing and end caps
1. Remove the scraper ring 1 from the bearing cap 3.
2. Remove O-ring 6 from the bearing cap and the end cap.
3. Pull the holding discs 5 off the bearing cap and end cap.
4. Remove the buffer seal 4 from the bearing cap and end cap.
5. Check the bearing 2 in the bearing cap.
Note
ISO standard cylinder with metal bearing (DSBG-...-Q / L / U / EX4)
In case of identiable damage to the bearing, which could impair its function
(e.g. deposits or scoring), the bearing cap or the bearing cap with end posi-
tion locking must be completely replaced.
6. ISO standard cylinder with plastic bearing:
If the bearing is damaged, press together at the inner end to unlock and
push out of the bearing cap.
1 2 3 4 5 6
7. Clean the seat of the scraper ring 1.
8. Clean the seat of the buffer seal 4.
9. Clean the seat of the O-ring 5.
10. ISO standard cylinder with plastic bearing:
Insert new bearing into the bearing cap. Push the bearing until the middle
shoulder of the bearing latches into the slot 3 in the bearing cap.
11. Grease the sliding surfaces of the bearing 2 with a thin lm of the grease
included in the set of wearing parts.
Fill the grease reservoir in the bearing 2/3 full with grease included in the
set of wearing parts.
2 53
4
1
12. Grease the new scraper ring as follows:
Area Cylinder with L / U Other cylinders
1 Surface facing piston rod Apply a thin
1)
lm
of grease on the
surface
Fill grease reser-
voir 2/3 full with
grease
2)
2 External surface for bearing
cap
apply a thin lm
1)
of grease
apply a thin lm
1)
of grease
3 Grease reservoir
2)
for bearing Fill 1/3 with grease Fill 2/3 with grease
1)
Chapter 5.2.1 on page 47
2)
Chapter 5.2.2 on page 47
1 2 3
To mount the scraper ring, note the version of the ISO standard cylinder:
DSBG-...- (standard version) or DSBG-...-A3 (suitable for unlubricated operation)
DSBG-...- (standard version)
Note
Note the mounting direction of the scraper ring:
Individual sealing lip or labelling facing the outside.
13. Use a suitable thrust piece to insert the scraper ring into the bearing cap.
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