December 2020
Installation, Operation and Maintenance Manual
MAN 606 Rev. 5
Maintenance
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Section 5: Maintenance
Figure 28
Replacement of cylinder seals
5.2
Extraordinary Maintenance
If there are leaks in the hydraulic cylinder, or a malfunction in the mechanical components,
or in case of scheduled preventive maintenance, the actuator must be disassembled and
seals must be replaced with reference to the follow general sectional drawing and adopting
the following procedures.
5.2.1
Replacement of Cylinder Seals
Stop-setting screw cover
Stop-setting screw
Plug
!
WARNING
Before executing any maintenance operation, it is necessary to intercept the supply line
and discharge pressure from the cylinder of the actuator.
1.
Unscrew the stop-setting screw cover (23) from the cylinder end flange.
2.
Measure the distance of the stop screw (20) with reference to the end flange (22)
surface, so as to be able to easily restore the setting of the actuator mechanical
stop, once the maintenance procedures have been completed.
3.
Unscrew the stop screw (20) by turning it anticlockwise with an Allen wrench until
the screw is completely with drawn inside the end flange threaded hole.
4.
Unscrew the nuts (25) from the tie rods (18): they must be gradually unscrewed all
at the same time.
5.
Slide off the end flange (22) and the tube (21).
