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HYDROPNEU Assembly instructions · M2 - Replacement of piston rod seals
Progress of the assembly:
For the replacement of the piston rod seals the bushing has to be dismantled (on this point see our assembly instructions „Replacement of bushings“).
This type of bushing is a plug-in sleeve held by cheese head screws which serves as a seal carrier and guide box.

Note:
As a replacement package the completely equipped bushing is available besides the complete seal kit.
Replacement of piston rod seals

The O-ring for the statically sealing at the mounting diameter of the bushing is buttoned into the groove pierced at the circle with the help of a seal bailer.
Be careful not to damage the O-ring by sharp edges at the tool or bushing, and do not install it in a distorted way.
The PU-packing ring used as piston rod seal is lead into the in a way “open” installation space from the pressure side.
With bigger diameters the installation into the closed groove is also done from the pressure side, i.e. the seal is also buttoned into the groove.
After the installation of the piston rod seal the so called bushing guide is lead into the bushing from the pressure side.
With bigger diameters this step can be omitted since here the bushing is formed in a way that it can function as guide bush at the same time.
Finally the wiper ring is to be buttoned-in on the front of the bushing.
After the successful replacement of the piston rod seals the bushing can be installed again by controlling the torque, (on this point see our operating instructions „Replacement of the bushings“).

If you have any further questions, you are welcome to ask for our support at any time.
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