9 - AHP Merkle GmbH

Tip
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Installing the piston seal
The piston seal is relatively easy to install using a suitable tool (mounting taper, mounting sleeve). If the piston
seal consists of two parts, the O-ring should be fi tted fi rst. The seal is placed in the designated groove using a
mounting sleeve (image 1) and a mounting taper (image 2). For sets with O-rings, it must be ensured that the
O-ring is not twisted in the process. For seals that do not return to their original shape by themselves, a calibrating
sleeve has to be used (image 3 and 4). After the seal has been installed, this sleeve is slid over the piston and
seal so as to press the seal radially into the groove.
Two piece sealing system:
1 2
3
One piece sealing system:
If the necessary tools are not available, the seal can be made more fl exible in
the hydraulic fl uid heated up to about 60 °C (140 °F). This allows it to stretch
more easily, so that it can be slipped carefully over the piston.
Piston seals should be installed quickly so that they can to their original dimensions.
4
Operating and maintenance instructions en
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