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Festo 7CRDSNUb_en
4.7
Repairing the cylinder CRDSNU-…-A2
The description in this chapter can be used to repair cylinders of the type
CRDSNU-…-A2
with the following features:
Code Description
Code Description
P
Elastic cushioning rings/pads at both ends
S2
Through piston rod
(not with standard cylinder; not possible with
MQ)
PPS
Self-adjusting pneumatic cushioning
…K2
Extended male piston rod thread
PPV
Adjustable pneumatic cushioning
K3
Female piston rod thread
(not with standard cylinder; not possible with
K2 and K5)
A
Position sensing
…K5
Special piston rod thread
(not possible with K3)
MQ
Short end cap without swivel mounting
(not possible with S2)
…K8
Extended piston rod at front
The repair steps can be found in chapter
4.8 "Repair steps for replacing the sealing seat"
.
4.8
Repair steps for replacing the sealing seat
4.8.1
Removing the sealing seat
•
Loosen the sealing seat from the bearing cap (the rear bearing cap also on
cylinders with through piston rod (S2)) and unscrew it.
•
Pull the sealing seat away from the bearing cap and piston rod.
•
Clean the thread of the bearing cap.
4.8.2
Greasing the piston rod
•
Pull the piston rod as far as possible out of the cylinder barrel.
•
Check the piston rod for damage.
The entire cylinder must be replaced if the piston rod is showing significant
damage.
•
Clean the piston rod as described in chapter
5.1 "Cleaning"
.
•
Apply a thin layer of the grease included in the set of wearing parts to the
surface of the piston rod (see chapter
5.2.2 "Thin grease film"
).
