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Festo 7ADVU / AEVUa_en
4
Repair steps
4.1
Preparation
•
Before starting the repair, remove any attachments (e.g. yoke plate on ADVUL) in accordance with 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 bearing or end cap, particularly with types AEVU-… / AEVUZ-… 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.
•
Use suitable support devices.
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 compact cylinder ADVU… / AEVU…
with piston diameter 32 / 40 / 50 / 63 / 80 / 100
The description in this chapter can be used to repair compact cylinders of type ADVU…-…/AEVU…-…:
Code Description
Code Description
L
Protection against rotation (e.g. yoke plate)
S1
Reinforced piston rod
Q
Square piston rod
S2
Through piston rod
Z
Pulling
S6
Seals heat-resistant up to 120°C
A
Male thread
S20
Through, hollow piston rod
P
Elastic cushioning rings/pads
S26
Through piston rod, heat resistant up to 120°C
A
Position sensing
S206 Through, hollow piston rod, heat-resistant up to
120°C
R3
Increased corrosion protection
4.3.1
Structure of the bearing cap
1
2
4
3
1
Bearing cap
2
O-ring
3
Bearing
4
Wiper seal
