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Festo 7CRDSNUb_en
4
Repair steps
Only the complete sealing seat can be replaced on the cylinder of the type CRDSNU.
4.1
Preparation
•
Before starting the repair, remove any attachments in accordance with the instructions in the accompanying
operating instructions.
•
Keep your working environment tidy.
•
Only use the spare parts and assembly aids (grease, locking agent, etc.) provided in the set of wearing parts.
Warning
Make sure that the sealing seat cannot suddenly come flying off.
•
Remove the non-return valves and tubing connection from the cylinder and depressurise the cylinder completely
so that any pressure present is not suddenly released when the cylinder is opened.
To prevent damage to sealing rims or guide surfaces, do not use pointed or sharp-edged assembly aids.
4.2
Visual inspection
Check the cylinder for visible damage that might impair its function (e.g. warping of the piston rod) as well as deposits
and scoring. The entire cylinder must be replaced if the cylinder barrel is showing signs of significant damage.
4.3
Repairing the cylinder CRDSNU-…-A1
The description in this chapter can be used to repair cylinders of the type CRDSNU-…-A1 with the following features:
Code Description
Code Description
P
Elastic cushioning rings/pads at both ends
S2
Through piston rod
(not possible with MQ and MG)
PPS
Self-adjusting pneumatic cushioning
…K2
Extended male piston rod thread
(not possible with K3)
PPV
Adjustable pneumatic cushioning
K3
Female piston rod thread
(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 pos-
sible with S2)
…K8
Extended piston rod at front
MG
Sealing seat without mounting thread
(not possible with S2)
The repair steps can be found in chapter
4.8 "Repair steps for replacing the sealing seat"
.
