Festo DSBC Series, Repair Instructions

Page: 39 / 56

39 / 56 Festo 7DSBCa_en
4.7.5 Inserting the piston rod into the cylinder barrel
1. Clean the cylinder barrel with a cloth (

Chapter 5.1 on page 53 ).
2. Grease the following parts with the grease included in the set of wearing
parts:
Component Greasing
Inside surface of cylinder barrel apply a thin film
1)
of grease
Surface of piston rod apply a thin film
1)
of grease
Piston seal lip rings
3)
apply thin film
1)
of grease on the outside
Piston surface between lip rings
(grease reservoir
2)
)
fill uniformly with grease
Cushioning boss / buffer sleeve apply thin film
1)
of grease on the outside
1) 
Chapter 5.2.1 on page 53
2) 
Chapter 5.2.2 on page 53
3)
Do not (completely) fill the installation groove of the lip rings / T-rings and
reduction of the seal to the sealing lip (outside) with grease.
3. Position the piston flat against the front side of the cylinder barrel.
Note
The sealing lip of the lip ring may not fold back against the inside of the
piston.
If necessary, use a flat object without sharp edges to insert the lip ring into
the cylinder barrel.
4. Insert the lip ring in the cylinder barrel by tilting and turning the ring slightly.
5. Push the piston completely through the cylinder barrel until the first lip ring
protrudes from the end of the cylinder barrel.
6. Pull back the piston rod until the piston sits fully in the cylinder barrel.
This procedure ensures that the sealing lips of the two lip rings sit correctly
in the cylinder barrel.
4.7.6 Repairing and attaching the bearing and end caps
1. Remove the circlip
1
and scraper ring
2
from the bearing cap
3
.
2. Remove the O-ring
6
from the bearing and end cap.
3. Pull the holding discs
5
off the bearing and end caps.
4. Remove the buffer seal
4
from the bearing and end caps.
5. Check the bearing in the bearing cap.
Note
ISO cylinder with metal bearing (DSBC-…-T1 / T4 and DSBC-…-L / U / L1)
In case of identifiable damage to the bearing, which could impair the
function (e.g. deposits or scoring), the bearing cap must be completely
replaced.
6.
ISO cylinder with plastic bearing (DSBC-…-A1):
If damaged, push the bearing out of the bearing cap.
1 3 2 4 5 6
Illustrated: DSBC-32-…-T1 / T4